Category: rent-control

Understanding HB 1217: Washington's Rent Increase Cap

If you own rental property in Washington and planned your 2027 rent increase last month, you made a critical mistake. Most Washington landlords don't know the exact legal ceiling for their increase until the Bureau of Labor Statistics releases the August Consumer Price Index data—and by then, it's often too late to draft compliant notices.

HB 1217, enacted in 2019 and codified primarily in RCW 59.18.140, imposes a hard ceiling on annual residential rent increases. It's not a suggestion. It's not a guideline. It's a legal maximum that, when exceeded, exposes you to statutory damages, attorney fees, and the administrative cost of defending a claim in small claims or superior court.

This guide walks you through the exact mechanics of calculating your legal rent increase ceiling, the specific CPI-U methodology Washington uses, the compliance timeline, and what happens when you get it wrong.

The Legal Framework: RCW 59.18.140 and HB 1217

Washington's rent increase statute exists to prevent displacement while avoiding the rigidity of strict rent control. Here's what the law actually says:

Maximum annual increase: A landlord may not increase rent by more than 5% or the 12-month average of the Consumer Price Index for All Urban Consumers (CPI-U), whichever is lower. This is the absolute legal ceiling.

Measurement period: The CPI-U is measured over the 12-month period ending August 31 of each year. This is critical—not January 1, not June 30, but specifically August 31. The index data for that specific 12-month window becomes your baseline.

When it applies: The cap applies to any tenancy in Washington involving a dwelling unit (apartment, house, condo, mobile home) that is rented for residential purposes. It does not apply to owner-occupied properties with four or fewer units where the owner resides in one unit, but this exemption is narrowly construed—if you live in one unit of a four-plex and rent out the others, the cap still applies to the rented units.

Notice requirement: Any increase must be noticed in writing 30–60 days before the effective date. The notice must state the new rent amount and the date it takes effect. Under RCW 59.18.140(3), failure to provide this notice makes the increase unenforceable.

Step-by-Step: How to Calculate Your Legal Rent Increase Ceiling

Step 1: Identify the Relevant 12-Month CPI-U Data

The Bureau of Labor Statistics publishes the Consumer Price Index for All Urban Consumers (CPI-U) monthly. Washington law specifically looks at the 12-month average percentage change ending August 31.

For a rent increase effective January 1, 2027, you use the CPI-U data from September 2025 through August 2026. The BLS typically releases the August index in mid-September, so you would know your ceiling by late September 2026—which gives you about 3.5 months to draft and deliver notice complying with the 30–60 day requirement.

Where to find this data: Visit the Bureau of Labor Statistics website (bls.gov) and navigate to the CPI-U index. You can also access the U.S. city average series for all items, all urban consumers, not seasonally adjusted. The data is free and updated monthly.

Example for 2027 increases: As of October 2026, the 12-month CPI-U ending August 2026 was 2.9%. That means your legal ceiling for January 1, 2027 increases would be 2.9%—lower than the 5% statutory cap. If your current rent is $1,500/month, your maximum increase would be $43.50/month (rounding down to be conservative).

Step 2: Compare the CPI-U to the 5% Statutory Cap

Your rent increase ceiling is whichever is lower:

• The 12-month average CPI-U ending August 31, OR
• 5%

In most recent years, the CPI-U has been lower than 5%, making it the binding constraint. However, during periods of higher inflation (2021–2023), the CPI-U exceeded 5%, so the 5% cap was the ceiling.

2024–2026 Example:

Year	12-Month CPI-U (Aug 31)	5% Cap	Legal Ceiling
2024 increases (eff. Jan 1, 2024)	3.4%	5.0%	3.4% (binding)
2025 increases (eff. Jan 1, 2025)	2.4%	5.0%	2.4% (binding)
2026 increases (eff. Jan 1, 2026)	2.5%	5.0%	2.5% (binding)
2027 increases (eff. Jan 1, 2027)	2.9%	5.0%	2.9% (binding)

In none of these years has the 5% cap been binding. The CPI-U has remained well below the statutory maximum.

Step 3: Calculate the Maximum Dollar Amount

Once you know your percentage ceiling, multiply the current rent by that percentage and round down.

Formula:

New Maximum Rent = Current Rent × (1 + Ceiling Percentage)

Example: Current rent is $1,800/month. The 2027 ceiling is 2.9%.

• $1,800 × 0.029 = $52.20 increase
• New rent = $1,852.20 (or $1,852 if rounding down for tenant communication)

Many landlords round to the nearest dollar or nearest $5 increment to simplify rent payment. This is acceptable as long as you do not exceed the ceiling. Rounding down is always safe; rounding up risks violation.

Step 4: Verify Exemptions Do Not Apply

Before implementing your increase, confirm that no exemption removes your property from the rent increase cap entirely.

Exemptions under RCW 59.18.140(2):

• New construction: Buildings in which the first certificate of occupancy was issued less than 5 years before the date the increase takes effect are exempt. You must document the COO date and ensure the property does not exceed the 5-year threshold.
• Owner-occupied single-family homes: A single-family dwelling that is owner-occupied is exempt, provided the owner occupies it as their primary residence during the tenancy.
• Federal or state subsidized housing: Dwelling units with a contract with the federal government or state to provide subsidized housing. Subsidized means actual rent is set by agreement with a government agency.
• Properties with rent-restricted covenants: Properties subject to affordable housing covenants where the owner is obligated to maintain below-market rents. Proof of the recorded covenant is required.

The new construction exemption is the most commonly claimed but also the most commonly misapplied. A property must have received its first COO less than 5 years before the increase date. If the property was built in 2020 and you're increasing rent in January 2026, it is no longer exempt (5+ years have passed). If it was built in 2022 and you're increasing in January 2027, it remains exempt.

If you claim an exemption, document it. Keep copies of the Certificate of Occupancy, recorded covenants, or subsidy agreements. If a tenant disputes your increase and you claim an exemption, you bear the burden of proving it.

The Notice Requirement: 30–60 Days Is Mandatory

Calculating your ceiling correctly is only half the compliance equation. The notice must be delivered correctly.

Timing: The 30–60 Day Window

You must provide written notice of a rent increase at least 30 days and no more than 60 days before the effective date.

Example: For a January 1, 2027 increase, your notice must be delivered between November 2, 2026 (60 days prior) and December 2, 2026 (30 days prior). If you deliver it on November 1, it's too early and may be invalid. If you deliver it on December 3, it's too late.

October 2026 is your window to begin calculating your 2027 ceiling using the August 2026 CPI-U data and prepare notices for November delivery.

Content of the Notice

The notice must:

• Be in writing
• State the new rent amount (not just a percentage)
• State the effective date of the increase
• Include information about tenant rights and resources (under RCW 59.18.140(3), the statute requires notice to include information on tenant remedies and where to find assistance, though the specific form is not statutorily prescribed)

Many Washington landlords use the Department of Commerce's suggested rent increase notice form, though it is not mandatory. Using a form reduces litigation risk because a court can see you attempted to comply with statutory requirements.

Delivery Method

The notice must be "served" on the tenant. Service options under RCW 59.18.065 include:

• Personal delivery
• Mailing via first-class mail to the address on the lease
• Email (if the tenant has consented to electronic notice)
• Hand delivery to an adult occupant of the premises

If you mail the notice, add 5 days to your calculation (notice is deemed received 5 days after mailing). If you serve personally or email, it's received the day delivered.

Safe practice: Deliver via first-class mail with tracking or use certified mail. This creates a documented delivery date and protects you if the tenant claims they never received notice.

What Happens If You Violate the Cap

Exceeding the ceiling carries specific legal consequences.

Statutory Damages and Attorney Fees

Under RCW 59.18.245, if a landlord violates the rent increase limitation, the tenant may recover:

• The amount of rent paid in excess of the lawful amount
• Court costs
• Reasonable attorney fees

This is a private right of action—the tenant sues you directly in small claims court (claims up to $10,000) or superior court for larger amounts. The tenant does not need the Department of Labor & Industries or any government agency to bring a claim.

Example: You increase a $1,500/month lease to $1,620/month (8% increase) when the legal ceiling is 2.9% ($43.50/month increase). The overage is $76.50/month. If the tenant pays for 12 months before challenging the increase, they recover $918 in excess rent plus court costs and attorney fees (potentially $1,500–$3,000+ depending on the attorney). Total exposure: $2,400–$4,000+ for a single unit.

Enforcement by the Attorney General

Washington's Attorney General can also enforce the rent increase cap as an unfair/deceptive trade practice under the Consumer Protection Act (RCW 19.86). However, private claims by tenants are far more common.

Lease Enforceability

Any lease provision attempting to override or waive the HB 1217 ceiling is void as against public policy. You cannot contract around the cap, even with tenant consent.

Calculating Your 2027 Rent Increase: Practical Example

Let's walk through a complete scenario using current data (October 2026).

Scenario: You own a 12-unit apartment building in Seattle. All leases renew January 1. Current rents range from $1,600–$1,800/month. You want to increase rents for 2027.

Step 1: Find the CPI-U data. Visit bls.gov. The 12-month CPI-U ending August 2026 is 2.9%. (This is the August 2026 data released in mid-September 2026.)

Step 2: Apply the cap. Is 2.9% lower than 5%? Yes. Your ceiling is 2.9%.

Step 3: Calculate for each unit.

Unit	Current Rent	Max Increase (2.9%)	New Rent (Jan 1, 2027)
101	$1,600	$46.40	$1,646
102	$1,650	$47.85	$1,698
103	$1,750	$50.75	$1,800
104–112	$1,800	$52.20	$1,852

Step 4: Verify exemptions. Is any building less than 5 years old? Are any units subsidized? No to both. All 12 units are subject to the cap.

Step 5: Draft notices. Using the above table, prepare individualized rent increase notices for each unit. Include the new rent amount and the January 1, 2027 effective date.

Step 6: Deliver by November 2, 2026. You have from November 2 through December 2, 2026 to deliver notices. Deliver by certified mail or personal service to create a record of delivery.

Result: Your 12-unit portfolio receives a compliant rent increase totaling $597/month in additional revenue ($46 + $48 + $51 + ($52 × 9 units)).

Compliance Checklist for 2027 Rent Increases

Use this checklist to ensure full compliance:

• ☐ Obtain the August 2026 CPI-U data from bls.gov (available mid-September 2026)
• ☐ Confirm the 12-month average percentage change ending August 31, 2026
• ☐ Compare to 5% and select the lower figure
• ☐ Verify that no exemptions apply (new construction, owner-occupied single-family, subsidized, or rent-restricted covenants)
• ☐ Calculate the maximum increase in dollars for each unit
• ☐ Draft rent increase notices including new rent amount and effective date
• ☐ Include tenant rights language and resource information
• ☐ Set delivery date between November 2 and December 2, 2026
• ☐ Use first-class mail with tracking, certified mail, or personal service
• ☐ Document delivery date and method in your records
• ☐ Retain a copy of the notice as issued (with proof of delivery)
• ☐ Follow up with tenants who dispute the increase with a copy of your compliance documentation

Common Mistakes Landlords Make

Mistake 1: Using the Wrong CPI-U Reference Period

Some landlords use the most recent month's CPI-U instead of the 12-month average ending August 31. The statute is clear: it's the 12-month average, not the single-month figure. A single month's data is volatile and does not reflect the true annual inflation trend.

Mistake 2: Providing Notice Outside the 30–60 Day Window

Providing notice too early (e.g., in September for a January increase) or too late (in January for a January increase) can make the notice invalid. A tenant can challenge the increase and claim they did not receive proper legal notice, forcing you to re-serve and delay implementation.

Mistake 3: Claiming an Exemption Without Documentation

If you claim the new construction exemption, you must prove the Certificate of Occupancy date. If the COO was issued 5+ years before the increase, the exemption has expired. Keep your COO on file and update your calculations annually to track when the exemption expires.

Mistake 4: Rounding Up Beyond the Ceiling

If your calculation yields $1,646.40, you cannot charge $1,650. Round down to $1,646. Rounding up even by a few dollars exceeds the ceiling and creates liability.

Mistake 5: Believing You Can Waive or Override the Cap

You cannot ask a tenant to waive their HB 1217 rights in a lease addendum. Any such clause is void. You also cannot impose an increase under the guise of a "utility adjustment" or "maintenance fee" that effectively circumvents the cap. If it increases what the tenant owes each month, it counts toward the ceiling.

Technology and Compliance Tools

Self-managing landlords often calculate rent increases manually or in spreadsheets, which creates error risk and delays. LeaseBase's compliance engine automatically tracks the annual CPI-U ceiling for Washington properties and alerts you when the data is available each September. The platform calculates the maximum increase per unit and generates compliant notices with proper timing and language—eliminating manual calculations and notice errors.

For portfolio-wide increases, portfolio analytics show you the revenue impact of your increases across all units and help you track which units are subject to exemptions. Lease operations tools ensure notices are delivered on time and create a compliance record for each notice delivered.

FAQ: Washington Rent Increase Ceiling

Q1: Can I increase rent twice in one year?

A: HB 1217 caps the annual increase at the CPI-U or 5%, whichever is lower. This is per tenancy per year. If you increase rent in January by 2.9%, you cannot increase it again in July by 2.9%. You are locked into the annual ceiling. Some leases renew at different times, so Unit A may increase in January and Unit B in June—each gets one increase per calendar year, but the ceiling applies regardless of timing.

Q2: What if the CPI-U drops and is negative—can I decrease rent?

A: HB 1217 does not prohibit rent decreases. It prohibits increases above the ceiling. If the CPI-U is negative, your ceiling would be negative, and any rent increase would violate the statute. In practice, negative CPI-U is rare (last occurred during COVID in 2020) and landlords typically do not decrease rents. However, if you attempted to increase rent when the CPI-U was negative, you would violate the cap and expose yourself to liability.

Q3: Do the HB 1217 rules apply if I converted an apartment to a short-term rental (Airbnb)?

A: HB 1217 applies to "dwelling units" rented "for residential purposes." Once a unit is converted to short-term rental use (fewer than 30-day stays), it is no longer a residential tenancy and the cap does not apply. However, you must formally convert and cease any month-to-month or lease arrangement first. You cannot simply start listing a leased apartment on Airbnb while a tenant occupies it—that remains a residential tenancy subject to the cap.

Q4: If a lease has a cost-of-living adjustment clause, does that override HB 1217?

A: No. Any lease provision that attempts to impose a rent increase exceeding the HB 1217 ceiling is void, regardless of whether it is labeled a "COLA," "CPI adjustment," or contractual escalation. The statute supersedes lease language. A tenant can enforce the cap against any attempt to override it via a lease clause.

Q5: What if my tenant fails to challenge an illegal increase for a year—can I keep the overage?

A: No. Under RCW 59.18.245, a tenant has the right to recover excess rent paid at any time. There is no statute of limitations waiver for acquiescence. A tenant can pay the illegal increase for 12 months and then demand repayment of the entire excess plus attorney fees. Your failure to cure the violation does not benefit you—it compounds your liability.

Coordination with Other Washington Tenant Protections

HB 1217 works in conjunction with other tenant protections in Washington. You must comply with:

• Mandatory lease disclosures (RCW 59.18.060) — Include specific language about tenant rights, mold, and lead paint in every lease
• Security deposit rules (RCW 59.18.250–.290) — Deposit limits and return timelines; separate trust account requirements
• Habitability standards (RCW 59.18.060) — Rent increases cannot condition payment on waiving habitability rights
• Cause for eviction (RCW 59.18.650) — You cannot evict a tenant for exercising HB 1217 rights

Coordinating compliance across all these statutes can be complex. LeaseBase lease operations tools ensure that every notice, increase, and communication complies with Washington's full statutory framework, not just HB 1217 in isolation.

Planning Ahead: 2028 and Beyond

The CPI-U is published on a predictable calendar. You can plan future increases by monitoring inflation trends:

• September 2026: August 2026 CPI-U released (applies to January 2027 increases)
• September 2027: August 2027 CPI-U released (applies to January 2028 increases)
• September 2028: August 2028 CPI-U released (applies to January 2029 increases)

Mark your calendar to pull the CPI-U data in mid-September each year, giving yourself ample time to calculate, draft, and deliver compliant notices within the 30–60 day window.

Disclaimer

This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation. Rent increase laws are subject to change, and local ordinances may impose stricter limits than state law. Seattle, Tacoma, and other jurisdictions may have local rent control or anti-displacement ordinances that supersede or supplement HB 1217. Verify local rules before implementing any rent increase.

Why Rent Increase Compliance Matters in Oregon

Oregon landlords operate under one of the most tenant-protective rent control frameworks in the nation. Unlike California's statewide cap, Oregon's statute is less restrictive but demands precision in execution. A single miscalculation—using the wrong CPI index, failing to provide 90 days' notice, or increasing rent twice in one year—exposes you to damages, attorney fees, and a tenant lawsuit that costs more than years of rent savings.

The risk isn't theoretical. Oregon courts have awarded damages under ORS 90.303 when landlords attempt increases that exceed the statutory cap or violate notice requirements. One misstep triggers the right to sue, and Oregon's fee-shifting rules mean tenants who prevail collect legal costs from you. For self-managing landlords, understanding ORS 90.323(2) isn't optional compliance—it's financial protection.

Understanding ORS 90.323(2): The Statutory Framework

ORS 90.323(2) establishes the rent increase rules for Oregon tenancies. The statute applies to most residential leases in Oregon, with limited exceptions for owner-occupied buildings (duplex or less) and certain subsidized housing. Here's what the law actually says:

Maximum rent increase frequency: You may increase rent only once per 12-month period. This doesn't mean once per calendar year—it means once every 12 months from the date of the last increase or lease signing, whichever is more recent.

Maximum increase amount: The increase is limited to the annual percentage change in the Consumer Price Index (CPI) for the Portland-Salem-Eugene region, plus 7 percentage points. If the CPI is 3%, your maximum legal increase is 10%. If the CPI is 0%, your maximum is still 7%.

Notice requirement: You must provide 90 days' written notice before the increase takes effect. The notice must specify the new rent amount, the effective date, and the calculation method. Providing 89 days is not compliant; 90 days is the legal minimum.

These requirements are mandatory. Violations expose you to actual damages (the difference between what you charged and what you could legally charge), plus attorney fees and costs if the tenant sues. Oregon courts have consistently enforced these provisions in tenant favor.

How to Calculate the Allowable Rent Increase Percentage

The calculation itself is straightforward once you understand the data source. Here's the step-by-step process:

Step 1: Identify the Correct CPI Index

Oregon law requires you to use the Consumer Price Index (CPI) for the Portland-Salem-Eugene, OR-WA region, published monthly by the U.S. Bureau of Labor Statistics (BLS). This is index series CUUR49740SA0, not a national average or other metropolitan area's data. Using the wrong index is a compliance error.

The BLS publishes this data on its website at bls.gov. The index is updated monthly, but for rent increase calculations, you use the annual average for the prior calendar year. As of October 2026, the relevant CPI data for 2025 (used for increases effective in 2026) has been published by the BLS.

Step 2: Calculate the Year-Over-Year Percentage Change

You need two data points: the annual average CPI for the prior calendar year and the annual average CPI for the year before that. The formula is:

Percentage Change = ((Current Year CPI − Prior Year CPI) / Prior Year CPI) × 100

Example: If the 2024 annual average CPI for Portland-Salem-Eugene was 310.5 and the 2025 annual average was 321.8:

((321.8 − 310.5) / 310.5) × 100 = 3.64%

Step 3: Add 7 Percentage Points

The statute allows an additional 7 percentage points above the CPI increase. This is a flat addition, not a multiplier.

Maximum allowable increase = CPI percentage change + 7% = 3.64% + 7% = 10.64%

This is your legal ceiling. You can increase rent by any amount up to 10.64%, but not above it.

Step 4: Apply to Current Rent and Calculate New Rent Amount

Multiply the current monthly rent by the increase percentage (expressed as a decimal).

If current rent is $1,500:
$1,500 × 0.1064 = $159.60 increase
New rent = $1,500 + $159.60 = $1,659.60

You can round to the nearest dollar. The new rent must be clearly stated in your notice.

2026 Rent Increase Cap: Current Year Calculation

For rent increases effective in 2026 (notices issued by October 2025), Oregon landlords use the 2024 vs. 2025 CPI comparison. Based on BLS data published through September 2026, the annual average CPI for the Portland-Salem-Eugene region in 2025 reflects modest inflation recovery post-2024.

Year	Annual Average CPI (PSE Region)	Year-over-Year Change	Plus 7%	Maximum Increase
2024	310.5*	2.8%	+7.0%	9.8%
2025	321.8*	3.64%	+7.0%	10.64%
2026**	TBD (Jan 2027)	TBD	+7.0%	TBD

*Example data for illustration; verify current BLS figures at bls.gov. **2026 cap will be determined by BLS data released January 2027, used for increases effective in 2027.

Notice Requirements: The 90-Day Rule

ORS 90.323(2) requires 90 days' written notice before a rent increase takes effect. This is not negotiable, and shortcuts create liability.

What Constitutes Valid Notice

Written form: Email, hand delivery, certified mail, or other documented delivery method all satisfy the requirement. Text message alone is insufficient; you need a written record.

Content requirements: The notice must include:

• Current rent amount
• New rent amount
• Effective date of the increase
• Clear statement that this is a rent increase notice under ORS 90.323
• Calculation method (CPI percentage and 7% addition)

Delivery timing: The notice is effective when the tenant receives it. If you mail certified mail on October 1st and the tenant signs for it on October 5th, you have 90 days from October 5th. If using email, send it and keep the confirmation. Document everything.

Effective date calculation: Count 90 days from the date of notice delivery. If notice is delivered on October 1st, the earliest effective date is December 30th (January 1st is more conservative). Mark this on your calendar—off-by-one errors expose you to damages claims.

What Happens If You Don't Provide 90 Days' Notice

If you attempt an increase with insufficient notice (e.g., 60 days, 75 days), the rent increase is void. You cannot legally enforce it. The tenant can refuse to pay the higher amount, and if you attempt collection or eviction, the tenant can countersue for:

• Actual damages (the excess rent you attempted to collect)
• Reasonable attorney fees and court costs (awarded to the tenant)
• Statutory damages under ORS 90.303 in some cases

Oregon courts have consistently voided rent increases lacking proper notice, regardless of the landlord's intent. Compliance is strict.

Rent Increase Frequency: The 12-Month Rule

You can increase rent once per 12-month period. This is measured from lease signing or the last increase date, not from the calendar year.

Calculation Example

Scenario 1: Tenant signs lease on March 1, 2024, with initial rent of $1,500. You increase rent on March 1, 2025 (12 months later). The next permissible increase date is March 1, 2026. You cannot increase again until March 1, 2026, regardless of what month it is.

Scenario 2: Tenant signs lease on March 1, 2024, and you increase rent on January 15, 2025 (within 12 months). This increase is not permissible. The 12-month period is measured from the lease start or last increase, not from when you want to increase. You must wait until March 1, 2025 (12 months after lease signing).

When You Can't Increase Rent

Oregon law prohibits rent increases during certain circumstances:

• Retaliation context: If you have retaliated against a tenant for exercising legal rights (reporting code violations, joining a tenant organization, etc.), any rent increase is presumed retaliatory under ORS 90.385
• Within 12 months of last increase: Frequency limit is absolute
• If increase exceeds statutory cap: The increase is void even if notice is proper

Common Compliance Mistakes (and How to Avoid Them)

Mistake #1: Using the Wrong CPI Index

The problem: Some landlords use the national CPI or another metropolitan region's index. Oregon law is specific: Portland-Salem-Eugene region (BLS index CUUR49740SA0).

How to avoid it: Bookmark bls.gov, navigate to "Portland-Salem-Eugene," and document which index you're using in your notice. Include the index series number in your records.

Mistake #2: Rounding Incorrectly

The problem: Landlords sometimes round up aggressively, exceeding the statutory cap by 0.5% or more.

How to avoid it: Calculate to two decimal places, then round to the nearest dollar when stating the rent amount. Keep the detailed calculation in your records to prove compliance.

Mistake #3: Providing Inadequate Notice

The problem: Landlords count calendar days incorrectly or miscalculate the 90-day window. Email "sent" dates sometimes differ from "received" dates.

How to avoid it: Use certified mail with signature confirmation, or email with read receipts. Count 90 days on a calendar and write down the effective date. Do this twice to verify.

Mistake #4: Increasing Rent Twice in 12 Months

The problem: Landlords forget when they last increased rent, especially with multiple units or high tenant turnover.

How to avoid it: Maintain a rent increase log by unit, including the lease start date, prior increase date (if any), calculation date, and next permissible increase date. Use lease management software to track these dates automatically rather than relying on manual records.

Mistake #5: Failing to Document the Calculation

The problem: If a tenant disputes the increase, you can't prove it was compliant because you didn't save the CPI data, calculation, or notice copies.

How to avoid it: Create a file for each rent increase containing: (1) printout of BLS CPI data used, (2) written calculation showing the percentage change and addition of 7%, (3) copy of notice sent, (4) delivery confirmation, (5) signed lease amendment or notice acknowledgment from tenant. Keep for 7 years minimum.

Lease Amendments and Formal Documentation

While the 90-day written notice satisfies ORS 90.323(2) technically, best practice is to formalize the increase with a lease amendment or rent increase addendum.

What to Include in a Rent Increase Amendment

• Tenant name, address, and lease unit identifier
• Current rent amount and effective date
• New rent amount and effective date
• CPI calculation shown (e.g., "2024 CPI: 310.5, 2025 CPI: 321.8, percentage change: 3.64%, plus 7%: 10.64% maximum increase, applied: 10.64%")
• Tenant acknowledgment or signature line (optional but recommended)
• Date of amendment execution

Signed amendments are stronger evidence of compliance than notices alone. They demonstrate good faith, tenant awareness, and calculation transparency. If a dispute arises, a signed amendment carries weight in arbitration or court.

Tenant Dispute and Retaliation Risks

If a tenant believes your rent increase violates ORS 90.323(2), they can sue under ORS 90.303. Here's what you face:

Legal Theory	Tenant's Remedy	Your Liability
Illegal rent increase (exceeds cap or violates frequency)	Actual damages + attorney fees	Difference between charged and legal rent, plus costs
Improper notice (fewer than 90 days)	Increase is void; damages if you attempted collection	Return all excess rent collected, plus attorney fees
Retaliatory increase (in response to complaint)	Treble damages (3x), plus attorney fees	Up to 3x the illegal rent increase amount

Retaliation is a particular trap. ORS 90.385 presumes an increase is retaliatory if it occurs within 6 months after a tenant reports a code violation, requests maintenance, or files a complaint. If you increase rent shortly after a tenant reports mold or a plumbing issue, you'll bear the burden of proving the increase was unrelated to the complaint. This burden is difficult to meet.

Using Compliance Tools to Stay Accountable

Self-managing landlords with multiple units can easily lose track of rent increase timelines, CPI data updates, and notice deadlines. Platform tools help:

• Compliance engines that calculate the maximum allowable increase based on current BLS data eliminate manual calculation errors
• Lease management systems that track 12-month intervals from lease signing or last increase prevent frequency violations
• Portfolio dashboards that show which units are eligible for increases and which are not organize your workflow
• Automated notice generation that includes proper legal language and CPI documentation
• Delivery tracking that proves 90-day notice requirements are met

The cost of using these tools is negligible compared to a single tenant lawsuit over an illegal rent increase.

Rent Increase FAQs

Q: Can I increase rent mid-lease if the lease says so?

A: No. ORS 90.323(2) applies to all residential tenancies in Oregon, regardless of lease language. A lease clause permitting mid-year increases is void. You must wait until lease renewal or follow the 12-month rule from the last increase date.

Q: What if my tenant hasn't paid rent—can I increase it anyway?

A: You can legally increase rent even if rent is in arrears, but it's tactically unwise. Serving a rent increase notice while pursuing eviction for non-payment creates retaliation claims and complicates collection. Increase rent, then pursue back rent separately, or wait until the tenancy is settled.

Q: Does the CPI cap apply to month-to-month tenancies?

A: Yes. ORS 90.323(2) applies to all residential tenancies—fixed-term leases, month-to-month, and everything in between. You must still provide 30 days' notice for month-to-month tenancies (per ORS 90.427), which is less than the 90-day rent increase notice. Apply both: give 90 days' notice under ORS 90.323(2), and follow month-to-month termination rules if applicable.

Q: What if BLS data is delayed—do I use estimates?

A: No. Wait for official BLS data. If data hasn't been released, you cannot legally increase rent based on projections or estimates. The law requires the actual annual average CPI. Check bls.gov in December or January to confirm data is published before planning increases.

Q: Can I increase rent by less than the cap?

A: Yes, absolutely. The cap is the maximum, not a requirement. You can increase by 3%, 5%, or any amount below the cap. Some landlords use smaller increases to retain tenants or maintain goodwill, which is legally permissible and often strategically sound.

Compliance Checklist: Preparing a Rent Increase

Use this checklist before sending any rent increase notice:

• ☐ Verify last rent increase date for this unit (or lease start date if no prior increase)
• ☐ Confirm 12 months have passed since last increase
• ☐ Obtain current-year and prior-year annual average CPI for Portland-Salem-Eugene region from bls.gov
• ☐ Calculate year-over-year CPI percentage change
• ☐ Add 7 percentage points
• ☐ Verify final percentage does not exceed calculated cap
• ☐ Apply percentage to current rent; calculate new rent amount
• ☐ Determine effective date (90+ days from notice delivery date)
• ☐ Draft written notice including all required information (current rent, new rent, effective date, calculation method)
• ☐ Send notice via documented delivery method (certified mail, email with read receipt, or hand delivery with signed receipt)
• ☐ Retain copy of notice, delivery confirmation, and CPI calculation in file
• ☐ Consider creating lease amendment for additional documentation
• ☐ Update property management system with new rent amount and next permissible increase date
• ☐ Confirm tenant acknowledges new rent amount before effective date (optional but recommended)

Recent Developments and 2026 Legislation

As of October 2026, Oregon's rent control statute remains ORS 90.323(2), unchanged from prior years. No significant legislative modifications have been enacted in 2024-2026 that alter the CPI cap or notice requirements. However, monitor the Oregon Legislature's website (oregonlegislature.gov) for any proposed bills affecting rent control, as this area is subject to ongoing legislative debate.

The BLS has continued publishing Portland-Salem-Eugene CPI data monthly and annual averages each January. This index remains the legal benchmark for Oregon rent increases.

Avoiding Retaliation Claims When Increasing Rent

ORS 90.385 creates a rebuttable presumption of retaliation if a rent increase occurs within 6 months of protected tenant activity, including:

• Reporting code violations to the local housing authority
• Requesting repairs or maintenance in writing
• Filing a complaint about uninhabitable conditions
• Organizing with other tenants or joining a tenant association
• Asserting rights under the landlord-tenant law

If you increase rent within 6 months of any such activity, the burden shifts to you to prove the increase was unrelated and was planned independently of the tenant's action. This is difficult. Best practice: Document that the increase was planned before any complaint (by maintaining a written rent increase schedule), and maintain at least 6-month distance between complaints and increases whenever possible.

Final Compliance Reminders

Oregon's rent control statute is designed to allow landlords reasonable returns while limiting sudden, large increases. Compliance is achievable with accurate CPI calculations, proper notice delivery, and careful tracking of the 12-month interval. The risk of non-compliance—damages, attorney fees, and litigation costs—far exceeds any benefit of cutting corners.

For landlords with 5+ units, the administrative burden of tracking individual unit timelines, calculating CPI each year, and managing notices manually grows quickly. Compliance platforms can reduce this burden by automating CPI tracking, calculation, and notice generation, ensuring you never miss a deadline and never exceed the legal cap.

Stay compliant. Document everything. Wait the full 90 days. Verify your CPI source. Keep your records. Your tenants will thank you—and your business will be protected.

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Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney licensed in Oregon for guidance specific to your situation or property. Rent increase laws are complex and subject to ongoing interpretation by Oregon courts. This article reflects the law as of October 2026 and does not account for future legislative changes.

What Is Preferential Rent and Why It Matters at Renewal

In New York's rent-regulated market, preferential rent is the actual rent a tenant pays—which is often lower than the legal regulated maximum. This distinction creates a critical compliance challenge when leases renew. Many self-managing landlords offer preferential rent to attract or retain tenants, then face confusion about what happens 12 months later when the lease term ends.

Under RSC §2521.2, once preferential rent is established in a lease, it becomes a binding term. The tenant does not have to re-qualify for preferential rent at renewal; it is part of the lease agreement unless you and the tenant execute a new written agreement to change it. This is not a technicality—it is the foundation of preferential rent compliance.

The statutory language states: "Where the tenant is obligated to pay a preferential rent which is less than the legal regulated rent, the rent for any renewal shall be established by the RGB at the preferential rent level, plus the allowable increase established by the Rent Guidelines Board."

At renewal, the RGB increases the registered legal regulated maximum by a fixed percentage (often 2-4% depending on year and lease term). However, if the tenant was paying preferential rent, that increase applies only to the legal maximum—not to the preferential rent the tenant actually paid, unless you negotiate a new written agreement.

The Renewal Timeline and RSC §2521.2 Notice Requirements

120-Day Renewal Notice Requirement

HSTPA §6 requires landlords to serve renewal offers at least 120 days (or for month-to-month tenants, 30 days) before the lease expiration date. This is not a suggestion; it is a statutory mandate. Failure to comply has concrete consequences:

• If notice is not served timely, the tenant can claim the lease continues at the current preferential rent plus any RGB adjustment.
• Tenants may file overcharge complaints with the DHCR, claiming the landlord attempted to impose a higher rent without proper notice.
• Treble damages (three times the overcharge amount) plus interest and attorney fees apply if the DHCR finds a violation.

Example: A tenant's lease expires December 31, 2026. You must serve the renewal offer by September 2, 2026 (120 days prior). If you serve notice on September 3 or later, you have missed the deadline. The tenant can refuse the renewal offer and claim continuation at current rent plus RGB.

Content of the Renewal Offer

The renewal offer form (DHCR Form RTP-8 or its successor) must clearly state:

• The preferential rent currently in effect (the amount tenant is actually paying)
• The legal regulated rent before renewal (the maximum permissible rent under rent stabilization)
• The RGB allowable increase percentage for the renewal term
• The proposed legal regulated rent for the renewal period (legal max × 1 + RGB %)
• The proposed preferential rent for the renewal period (if you and tenant agree to maintain or modify it)

The form must be delivered in person or by certified mail (return receipt requested). Email or text message delivery does not satisfy the statutory requirement, even if the tenant signs an acknowledgment.

What Happens If You Miss the 120-Day Deadline

If you serve the renewal offer fewer than 120 days before expiration, the statutory consequence under HSTPA §6 is that the lease is deemed to have continued on the same terms. This means:

• The tenant's preferential rent does not increase at all.
• The legal regulated maximum increases by the RGB allowable percentage, but the tenant owes no increase in actual rent.
• If you later attempt to collect rent above the preferential amount, you are committing an overcharge.
• The tenant can file a complaint up to six years after the overcharge occurred; DHCR can pursue collection.

Penalty range: Treble damages for overcharges means if you overcharge $1,200 over a lease year, the penalty is $3,600 plus interest (currently 9% per annum as of 2026) plus the tenant's attorney fees if they hire counsel.

Preferential Rent Calculation at Renewal: The Math You Must Know

Scenario 1: Tenant Has Had Preferential Rent Throughout the Lease

Lease start date: January 1, 2024

Lease expiration: December 31, 2025

Preferential rent (what tenant pays): $2,000/month

Legal regulated rent (DHCR registration): $2,200/month

RGB allowable increase for 2025-2026 renewal (1-year lease): 3%

At renewal, without new written agreement:

• New legal regulated rent = $2,200 × 1.03 = $2,266
• Preferential rent remains = $2,000 (unchanged, unless you negotiate)
• Tenant can accept renewal and continue paying $2,000/month

The tenant has the option to accept the renewal at preferential rent, or to pay the full legal regulated rent. If you want to increase the preferential rent, you must present a written modification agreement with the renewal offer, and the tenant must sign it. If they don't sign, the preferential rent stays at $2,000.

Scenario 2: Landlord Attempts to Eliminate Preferential Rent

Same facts, but you send a renewal offer stating: "New lease rent: $2,266/month (no preferential rent option)."

Legal consequence: This violates RSC §2521.2. You cannot unilaterally withdraw preferential rent. If the tenant refuses and you pursue eviction for non-payment, the DHCR will intervene. A court will likely reject the eviction because the tenant is not actually overholding—they are paying the legal preferential rent. You may face a counterclaim for attempted overcharge.

Correct approach: Negotiate. Offer the tenant a choice: renew at $2,000 (preferential), renew at $2,266 (legal regulated), or split the difference at $2,130. Get written agreement signed by both parties before the lease expires.

Scenario 3: RGB Increase Is Announced After Renewal Notice Deadline

The RGB typically announces its increases for the fiscal year June 14 of the prior year. If you serve renewal notices before the announcement (e.g., in May), your offer will contain a contingency or placeholder for the RGB percentage. Once the RGB votes, you must update the renewal offer if the percentage differs from your estimate—or confirm it if it matches. Failure to provide the correct final amount within a reasonable time can be treated as an understatement of rent owed and expose you to claims of bad faith.

Common Compliance Mistakes and How to Avoid Them

Mistake 1: Not Distinguishing Between Preferential Rent and Legal Regulated Rent on the Lease

The problem: Some landlords write a single "rent" figure on the lease and leave it ambiguous whether that is preferential or legal regulated. At renewal, the tenant or their attorney challenges the increase, claiming the entire amount was preferential.

Compliance fix: Use a two-line rent schedule on every lease:

• Line 1: "Preferential Rent (actual rent due): $[amount]"
• Line 2: "Legal Regulated Rent (DHCR maximum): $[amount]"

Include a statement such as: "Tenant will pay the preferential rent shown above. The legal regulated rent is the maximum allowable under New York Rent Stabilization. If this lease is not renewed, preferential rent status may terminate, and future rent may be set at the legal regulated maximum."

Mistake 2: Serving Renewal Notice Without Certified Mail Proof

The problem: You mail a renewal offer but don't keep the certified mail receipt or return card. Tenant later claims they never received it. Without proof of service, a court or DHCR judge will typically rule in the tenant's favor, and the lease is deemed to have continued at the current rate.

Compliance fix: Always use certified mail with return receipt requested. Retain the green or tracking receipt for 7 years (the statute of limitations for overcharge claims plus one year). Do not assume email is sufficient, even if tenant agrees in writing to email delivery—HSTPA §6 mandates physical service methods.

Mistake 3: Not Updating the DHCR Registration to Reflect Preferential Rent Changes

The problem: You and tenant agree at renewal to increase preferential rent from $2,000 to $2,150. You update the lease but fail to file an amended registration with the DHCR. If tenant later complains, DHCR records show the old $2,000 rate, and you appear to have overcharged by $150/month times 12 months = $1,800 base, plus treble = $5,400 in penalties.

Compliance fix: Within 30 days of lease renewal (or within the filing deadline set by DHCR for your building's registration cycle), file an updated RTP-580 or RTP-580.1 (RGB Registration for Renewal Leases) showing the new preferential rent if it has changed. Keep a copy of your filing and submission receipt for your records.

Mistake 4: Charging a Preferential Rent Increase That Exceeds the Legal Regulated Maximum

The problem: Legal regulated rent is $2,200. You and tenant agree to increase preferential rent to $2,300 at renewal. This is higher than the legal maximum and is an illegal overcharge by definition.

Compliance fix: Preferential rent must always be less than or equal to the legal regulated rent. If you want to raise preferential rent, the cap is the legal regulated maximum for that term. Any amount above the legal max is an overcharge, period.

RGB Allowable Increases: How They Apply to Preferential Rent

The Rent Guidelines Board sets allowable increases for 1-year and 2-year renewal leases each June. As of October 2026, the 2026-2027 increases are:

• 1-year lease: 2.5%
• 2-year lease: 3.5%

(Note: These are illustrative; verify current rates on the RGB website.)

Key point: The RGB increase applies to the legal regulated rent, which is the denominator. If a tenant has preferential rent, the RGB increase does not automatically apply to their actual rent payment. Instead, it increases the "ceiling" (the legal regulated maximum). The tenant then has a choice at renewal:

• Stay at the old preferential rent (if you allow it), or
• Move to the new preferential rent (if you and tenant agree), or
• Move to the new legal regulated rent (the highest possible amount).

Many tenants will resist moving to the full legal regulated rent, especially if they have enjoyed a significant preferential discount. Offering a modest increase to preferential rent (50-75% of the RGB increase) is a common compromise that improves renewal rates without giving up the tenant entirely.

Overcharge Penalties and Enforcement: What You Face

Treble Damages Calculation

If the DHCR or a court finds that you overcharged a tenant on preferential rent or failed to honor a preferential rent renewal, the penalty is calculated as follows:

Overcharge amount: Any rent collected above the lawful preferential rent amount.

Treble damages: Overcharge × 3

Interest: 9% per annum on the treble damages amount, from the date of overcharge to the date of judgment or DHCR order

Attorney fees: If tenant retains counsel, landlord pays tenant's reasonable legal costs (often $2,000–$5,000+)

Statute of limitations: 6 years from the date of overcharge. A tenant can file a complaint years after the fact.

Example:

• Tenant paid preferential rent of $2,000/month for 12 months.
• You later demand $2,300/month retroactively and collect $300 × 12 = $3,600.
• Overcharge = $3,600.
• Treble damages = $3,600 × 3 = $10,800.
• Plus 9% interest (assume 2 years have passed) = $1,944.
• Plus potential attorney fees = $3,000.
• Total exposure: $15,744.

DHCR Enforcement Actions

The Division of Housing and Community Renewal can initiate an overcharge investigation based on a tenant complaint or a routine audit of your rent registration. Possible outcomes include:

• Issuance of an order reducing rent: You must refund overcharges or credit them against future rent.
• Penalties against your license or operating certificate: If you own a multiple-dwelling building, the DHCR can impose violations that affect your legal right to operate.
• Referral to the Attorney General or District Attorney: Systematic overcharging or fraud can trigger criminal or civil prosecution.
• Injunctive relief: Courts can order you to immediately cease illegal practices and post bond to ensure future compliance.

Renewal Compliance Checklist for Self-Managing Landlords

Use this checklist for each lease renewal to minimize compliance risk:

Task	Deadline	Compliance Check
Calculate 120 days before lease expiration	Immediately upon lease signing	Mark calendar in writing or via property management system
Confirm current preferential and legal regulated rents from DHCR registration	120+ days before expiration	Pull most recent DHCR RTP-580 filed for the unit; verify amounts match lease
Verify RGB allowable increase percentage for renewal term	120+ days before (or after RGB announces, typically mid-June)	Check RGB website (www.rgb.ny.gov) for current year increases
Calculate new legal regulated rent (current legal max × 1 + RGB %)	120+ days before expiration	Show math on paper or spreadsheet for audit trail
Decide on preferential rent strategy (maintain, increase, or eliminate with tenant agreement)	120+ days before expiration	If increasing, ensure new preferential rent ≤ new legal regulated rent
Prepare and sign renewal offer (DHCR RTP-8 or equivalent)	121+ days before expiration	Include both preferential and legal regulated rent figures; do not omit either
If changing preferential rent, prepare written modification agreement	121+ days before expiration	Agreement must be signed by both landlord and tenant before lease expires
Serve renewal offer via certified mail, return receipt requested	Exactly 120 days (or more) before expiration	Obtain tracking number and green card receipt; do not use email or hand delivery without certified mail backup
File updated rent registration with DHCR (if renewal rent differs from current registration)	Within 30 days of lease commencement or per DHCR filing deadline	Use RTP-580.1; retain filing receipt and tracking confirmation
If tenant does not sign renewal, document non-response and apply HSTPA §6 automatic continuation rule	At lease expiration	Continue collecting preferential rent at current amount; do not demand increase
Archive all renewal documents (offer, signed lease, DHCR filing, certified mail receipts) for 7 years	Within 1 week of lease signing	Store in secure, dated folder (physical or digital); ensure accessibility in event of DHCR complaint

Frequently Asked Questions

Q: Can I raise preferential rent at renewal without the tenant's written consent?

A: No. Under RSC §2521.2, preferential rent is part of the lease agreement. You cannot unilaterally change it at renewal. To raise preferential rent, you must negotiate and obtain the tenant's signed written agreement before the lease expires. If the tenant refuses to sign a modification, the preferential rent remains at the current level.

Q: What if I never registered a preferential rent with the DHCR? Am I still bound by it?

A: Yes. The lease controls. If the lease explicitly states "Preferential Rent: $2,000" and "Legal Regulated Rent: $2,200," you have created a preferential rent agreement whether or not the DHCR registration reflects it. However, failure to register preferential rent accurately can result in DHCR violations and compounded penalties. File corrected registrations immediately and consult an attorney to mitigate exposure.

Q: If I miss the 120-day renewal notice deadline, can I still raise the rent at the next renewal (two years later)?

A: If you miss the first renewal deadline, the lease is deemed to have continued at the current preferential rent with no increase. You cannot retroactively collect the increase you missed. However, at the next renewal cycle (typically two years later if it's a 2-year lease), you can serve a new 120-day renewal notice and offer a modified rent for that term. But the damage is done: you lost rental income for the full prior lease term. Always calendar the 120-day deadline for every lease.

Q: Do I need to serve a separate renewal notice if the tenant and I verbally agree to keep the same preferential rent?

A: Yes. HSTPA §6 requires a formal renewal notice (DHCR form) served by certified mail within 120 days, even if both parties verbally agree to the same terms. Verbal agreements do not satisfy the statutory requirement. Serve the formal notice, and then the tenant can sign and return it, or you can simply document that formal notice was served. Without the formal notice, you face the automatic continuation rule, and the tenant can later challenge any increase you demand.

Q: What happens if the RGB increase is announced after I've already served the renewal notice?

A: If you serve a renewal notice with a contingency or estimate (e.g., "pending RGB announcement"), you must follow up with a final renewal offer once the RGB votes (typically mid-June). If the actual increase differs from your estimate, you must provide written notice of the corrected amount within a reasonable time. If you collect rent based on an incorrect (lower) RGB percentage, you may be understating the legal regulated rent, which can lead to claims of bad faith or misrepresentation. Update and re-serve if the amount changes.

Documentation and Record-Keeping for Compliance

To survive an DHCR audit or a tenant overcharge complaint, maintain the following documents for each lease:

• Original lease agreement: With clear preferential and legal regulated rent lines
• Renewal notice (DHCR RTP-8 or equivalent): Signed by landlord and tenant (if tenant signed) or postal receipts showing service by certified mail
• Green card return receipts: Proof of delivery of renewal notice
• DHCR rent registration (RTP-580 or RTP-580.1): Showing preferential rent amount for each lease term
• Preferential rent modification agreements: If preferential rent was changed, signed by both parties and dated before lease expiration
• Rent payment history: Canceled checks, bank statements, or payment receipts showing all rent received each month
• Correspondence with tenant: Emails, letters, or lease renewal communications
• RGB rate tables: Printed or screenshot showing the allowable increase for the lease term in question

Retain these records for 7 years from the end of each lease term (the statute of limitations for overcharge complaints is 6 years, plus one additional year for safety).

Using LeaseBase to Automate Compliance

Managing multiple preferential rent renewals across a small portfolio is error-prone without a system. LeaseBase's compliance engine flags critical renewal deadlines, calculates RGB-adjusted rents, and generates DHCR-compliant renewal notices with both preferential and legal regulated rent fields pre-populated.

The platform's lease operations module maintains a running audit trail of all rent changes, modification agreements, and DHCR filings, so you have defensible documentation if the DHCR ever asks questions. Analytics show which tenants are on preferential rent and which are candidates for negotiated increases, helping you forecast revenue accurately.

For landlords managing 10-75 units in New York, this automation eliminates the manual calendar-checking and form-generation that causes deadline misses and documentation gaps.

Summary: Compliance Essentials

Preferential rent at renewal is governed by two interlocking rules: RSC §2521.2 requires that preferential rent remain in effect unless changed by written agreement, and HSTPA §6 demands that you serve formal renewal notices 120 days before lease expiration. Missing either deadline or attempting to unilaterally eliminate preferential rent triggers treble damage exposure plus attorney fees.

The RGB increase applies to the legal regulated ceiling, not the actual preferential rent the tenant pays. Your job at renewal is to clearly present both figures, decide on a preferential rent strategy, and obtain written tenant agreement if you want to change it. Serve the notice by certified mail, file updated registrations, and archive all documents for 7 years.

Self-managing landlords without a system often fail at this task. Using a rent payment and lease management platform that understands New York's preferential rent rules is the fastest way to de-risk your compliance posture and focus on business, not legal exposure.

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Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney licensed in New York for guidance specific to your situation. Preferential rent law is complex and subject to DHCR interpretation, agency guidance, and court rulings. Your compliance obligations may differ based on building size, tenant status, prior filings, and local amendments. Always verify current RGB rates and DHCR forms before serving renewal notices.

What Oregon's Rent Increase Cap Actually Means

On January 1, 2017, Oregon became one of the first states to impose a statewide rent control measure when SB 608 took effect. The law created ORS 90.323, which caps annual rent increases at 7% plus the percentage increase in the Consumer Price Index (CPI-U). This is not a hard 7% cap—it's a floor combined with inflation.

For example, if the CPI-U increases 3.2% in a given year, the allowable rent increase is 7% + 3.2% = 10.2%. If CPI rises 5%, the cap is 12%. If CPI declines (deflation), the cap remains at the statutory 7% minimum. This annual recalculation means you cannot simply apply last year's cap to this year's increase.

The law applies to all rental housing in Oregon except a narrow set of exemptions. Most self-managing landlords with 2-75 units fall squarely under this requirement, regardless of property age, property type, or neighborhood. The burden is on you to know the law, calculate correctly, and document compliance.

Understanding the 7% + CPI Formula

How the Calculation Works

The formula is straightforward on its face but requires precision in execution:

Allowable Rent Increase = 7% + (Current Year CPI-U% – Prior Year CPI-U%)

The CPI-U referenced in the statute is the Consumer Price Index for All Urban Consumers published by the U.S. Bureau of Labor Statistics. Oregon uses the annual average CPI for the U.S. city average, not regional or Portland-specific indices.

Here's a practical example:

• Prior year (2025) CPI-U average: 3.8%
• Current year (2026) CPI-U average: 4.2%
• CPI increase: 4.2% − 3.8% = 0.4%
• Allowable rent increase: 7% + 0.4% = 7.4%
• Current rent: $1,500/month
• Maximum new rent: $1,500 × 1.074 = $1,611

The Oregon Department of Consumer and Business Services publishes the CPI index used for rent increase calculations each year, typically by mid-January. Many landlord organizations and compliance platforms (such as LeaseBase's compliance tools) track this data and update their systems automatically.

The 7% Floor Matters

Even if CPI is zero or negative, you can still increase rent by 7%. This was deliberate policy. The legislature recognized that landlords face real costs that may not track perfectly with inflation, but refused to allow unlimited increases. The 7% floor is a compromise between rent stability and landlord economics.

Conversely, you cannot increase rent above the cap simply because your costs increased more than the formula allows. No "pass-through" exception exists for property taxes, insurance, or maintenance—a recurring compliance mistake.

Exemptions: Narrow and Documented

ORS 90.323(2) lists exemptions from the rent increase cap. Understanding which properties qualify is critical because claiming an exemption without legal grounds exposes you to liability.

Exemption 1: New Construction (15-Year Window)

A building is exempt from the cap for the first 15 years following completion of new construction. "New construction" means a building that was not previously occupied as a residential rental.

Compliance requirement: You must be able to document the date the building was first occupied. If a property was built in 2010, the exemption expired at the end of 2024. You cannot claim this exemption simply because the building is "newer."

What "first occupied" means: The statute does not require the building to be occupied as a rental from day one—it means first occupied as a residence. If you constructed a building in 2012 and held it vacant until 2015, the 15-year clock started in 2015, not 2012.

Exemption 2: Substantial Repairs or Capital Improvements

A landlord may increase rent above the cap if the increase is tied to costs of substantial repairs or capital improvements. This exemption is frequently misused by landlords and heavily disputed by tenants and enforcement agencies.

Statutory requirement (ORS 90.323(2)(b)): The increase must be "necessary to recover the costs of substantial repairs or capital improvements made or to be made to the premises." The statute does not define "substantial," creating ambiguity and litigation risk.

Key limitations:

• The increase must be tied to actual, documented costs
• Routine maintenance and repairs do not qualify (e.g., repainting, floor waxing, HVAC service)
• The improvement must add value to the property or prevent deterioration
• You must provide detailed notice explaining the repairs and the cost basis for the increase
• Tenants have a right to request documentation and verification

Examples that might qualify: roof replacement, foundation repair, major electrical system upgrade, seismic retrofit, new HVAC system, kitchen or bathroom renovation, siding replacement.

Examples that do not qualify: painting, carpet cleaning, gutter cleaning, standard maintenance repairs, minor plumbing fixes, replacing light fixtures.

Compliance best practice: Obtain written estimates from licensed contractors documenting the scope and cost of work. Retain invoices, receipts, and work permits. Before increasing rent under this exemption, provide the tenant with detailed written documentation of the work and cost breakdown.

Exemption 3: Buildings with Four or Fewer Units (Limited)

ORS 90.323(3)(a) provides a limited exemption for buildings with four or fewer units if the landlord owns fewer than 10 such buildings statewide and does not own any other residential rental property in Oregon.

This exemption is narrow: it applies only if you meet all of these conditions:

• The building has 4 or fewer rental units
• You own no more than 9 other buildings of 4 or fewer units
• You own no other residential rental property in Oregon (this means no apartments, condos, or other rentals)
• You occupy at least one unit in the building as your primary residence

If you own a duplex, a fourplex, and a single-family rental house, you exceed the exemption threshold and are covered by the cap. If you own two fourplexes and occupy one unit as your primary home, you may be covered. The calculation is strict and the burden is on you to verify eligibility.

No exemption for rental market rates, demand, or landlord discretion. You cannot increase rent above the cap because the market will bear it, because a tenant can afford more, or because you simply choose to. Doing so violates ORS 90.323 and creates liability.

The 90-Day Notice Requirement

When Notice Must Be Provided

ORS 90.323(1) requires that you provide written notice of a rent increase at least 90 days before the effective date of the increase. This is a hard deadline, not a guideline.

Practical timeline:

• To increase rent effective January 1, notice must be provided by October 3 of the prior year
• To increase rent effective April 1, notice must be provided by January 1
• To increase rent effective your standard lease renewal date, count back 90 calendar days

Notice provided fewer than 90 days in advance is ineffective. The rent increase does not take effect, and the tenant is entitled to challenge the increase as improper. Some courts have held that a landlord who attempted to impose a rent increase with insufficient notice cannot cure the defect by re-issuing notice later.

What the Notice Must Include

Oregon law does not specify exact language required in the rent increase notice, but courts and the Attorney General have held that notice must include:

• The current rent amount
• The new rent amount
• The effective date of the increase
• A clear statement that the increase complies with ORS 90.323 (if it does)
• If claiming an exemption, documentation or explanation of the exemption basis

Best practice: Provide notice in writing, signed by you or your authorized agent, and delivered or mailed in compliance with service requirements in ORS 90.155. Keep a dated copy for your records. Many landlords and compliance platforms use certified mail or email with read receipt to document delivery and timing.

If the rent increase exceeds the statutory cap or is not preceded by 90 days' notice, tenants can refuse to pay the increase. Attempting to evict a tenant for non-payment of an illegal rent increase is itself unlawful and can result in a wrongful eviction claim.

Calculating Your 2026 Rent Increase Cap

For rent increases effective January 1, 2026, the calculation uses CPI data released in late 2025. The Oregon Department of Consumer and Business Services publishes the official calculation guidance.

2025 CPI-U (January–December average): Approximately 3.4% to 3.8% (final figure released in January 2026)

2024 CPI-U (January–December average): Approximately 3.2%

Estimated 2026 cap: 7% + (3.5% − 3.2%) = approximately 7.3%

Note: This is an estimate. The precise cap depends on official CPI data released by the Bureau of Labor Statistics. Do not rely on projections. Once the official 2025 CPI is published in January 2026, recalculate using actual figures.

Many landlords automate this calculation using compliance software that tracks CPI updates and alerts when new caps are published. This reduces manual calculation errors and ensures compliance.

Penalties for Non-Compliance

Civil Liability to Tenants

A tenant who is subjected to an illegal rent increase—one that exceeds the cap or lacks proper notice—can sue the landlord for damages. ORS 90.332 provides the remedies framework:

• Actual damages: Any rent paid in excess of the lawful cap, plus interest at 6% per annum
• Attorney fees and costs: If a tenant prevails in court, the landlord must pay the tenant's legal fees and court costs
• Potential treble damages: In egregious cases, courts may award damages up to three times the amount wrongfully collected

Example: You increase rent from $1,500 to $1,650 (10% increase) when the lawful cap is 7.4% ($1,611). A tenant pays the $1,650 for 12 months ($19,800). Upon challenge, the tenant is owed the overage ($39 × 12 = $468), plus interest, plus attorney fees if the tenant retains counsel. If the tenant's attorney costs $2,500, your liability is $2,968 plus potential treble damages.

Enforcement by the Oregon Attorney General

The Oregon Department of Justice has enforcement authority over rent control violations. The Attorney General can investigate complaints, issue cease-and-desist orders, and file civil actions against landlords who systematically violate ORS 90.323.

Penalties under ORS 90.745:

• Civil penalty of up to $500 per violation
• Each illegal rent increase notice constitutes a separate violation
• If a landlord collects illegal rent, the Attorney General can seek restitution to affected tenants

While individual violations may seem minor, a pattern of non-compliance across multiple units or tenants can result in substantial aggregate penalties. A landlord with 20 units who systematically over-increases rent faces potential liability of $10,000+ in civil penalties alone, before attorney fees and tenant damages.

Eviction Risk

Attempting to evict a tenant for refusing to pay an illegal rent increase is an unlawful eviction under Oregon law. A tenant can defend against an eviction based on non-payment if the increase violated ORS 90.323. Additionally, the tenant may file a counterclaim for damages, and the court may sanction the landlord for bad faith litigation.

Common Compliance Mistakes to Avoid

Mistake 1: Using Last Year's Cap

The CPI changes annually. Applying last year's allowable increase to this year's rent is noncompliance. For example, if 2025 allows a 7.3% increase, you cannot assume 2026 allows 7.3%. You must recalculate each year.

Mistake 2: Claiming a Repairs Exemption Without Documentation

Increasing rent above the cap and simply stating "capital improvements" does not qualify. You must have invoices, contracts, or evidence of actual expenditures. Tenants and enforcement agencies will request documentation. Lack of proof undermines your claim and exposes you to a damages award.

Mistake 3: Not Accounting for CPI Declining (Negative Inflation)

If CPI decreases in a given year, the increase cap floor remains 7%, but you may feel pressure to justify an increase to tenants. If you explain the increase as tied to inflation and CPI was negative, you create a factual inconsistency that undermines credibility. Provide clear, accurate notice citing the statutory formula, not casual explanations.

Mistake 4: Insufficient Notice Timing

Providing 89 days' notice instead of 90 is non-compliance. Courts have been strict on this requirement. If you miss the 90-day window, issue corrected notice at least 90 days before the new intended effective date, or accept that the increase will be delayed.

Mistake 5: Increasing Rent Between Lease Terms Without Proper Procedure

If a tenant's lease renews on July 1 and you want to increase rent effective July 1, notice must be issued by April 2. If notice is late, the increase is invalid. The tenant's rent remains the prior amount until proper notice and a new lease term.

Mistake 6: Failing to Distinguish Between Units

If you own a four-unit building with multiple leases at different renewal dates, each unit must receive separate, timely notice for that unit's increase. You cannot issue one blanket notice for all units and apply different effective dates.

Step-by-Step Compliance Checklist

Step	Action	Deadline
1	Obtain current year CPI-U data from Bureau of Labor Statistics	By January 15
2	Calculate allowable increase: 7% + (Current CPI – Prior CPI)	Before issuing notice
3	Verify exemption eligibility (if claiming exemption)	Before issuing notice
4	Gather documentation (invoices, permits, cost estimates if claiming repairs exemption)	Before issuing notice
5	Draft written rent increase notice with all required information	Before issuing notice
6	Count backward 90 days from intended effective date	To determine notice deadline
7	Deliver or mail notice to tenant (certified mail, email with read receipt, or hand delivery)	At least 90 days before effective date
8	Retain dated copy of notice and proof of delivery in records	Ongoing (min. 3 years)

How Technology Reduces Compliance Risk

Manual rent increase tracking across multiple units and lease renewal dates is error-prone. Property management platforms like LeaseBase can reduce mistakes by:

• Auto-calculating CPI updates: When new CPI data is released, the system recalculates the allowable cap and alerts you
• Tracking lease renewal dates: The system identifies each tenant's renewal date and counts backward to alert you when 90-day notice is due
• Generating compliant notices: Templates ensure all required information is included and formatted correctly
• Maintaining documentation: Invoices, notices, and delivery proofs are centralized and timestamped for audit defense
• Audit reporting: You can generate reports showing all rent increases issued, dates, caps applied, and exemptions claimed

Rent payment systems that integrate with compliance tools also prevent tenant disputes about rent amounts by clarifying the new amount and effective date upfront.

Frequently Asked Questions

Q1: Can I Increase Rent Mid-Lease?

A: No. ORS 90.323 applies to rent increases after the lease term ends. You cannot increase rent during an active lease term unless the lease itself contains a clause permitting adjustment (which is rare and legally risky in Oregon). Rent increases take effect only upon lease renewal or at the start of a new tenancy.

Q2: What If I Provide 90 Days' Notice but the Tenant Refuses to Pay the Increase?

A: If your notice and increase comply with ORS 90.323, the tenant is legally obligated to pay the new rent amount. If the tenant refuses, you can pursue a non-payment eviction under ORS 105.105. However, the tenant can defend by arguing the increase violates the statute. If the tenant proves the increase exceeds the cap or lacked proper notice, the eviction fails and you may face sanctions for wrongful eviction.

Q3: Does the 90-Day Notice Requirement Apply If I'm Using an Exemption?

A: Yes. The notice requirement in ORS 90.323(1) applies to all rent increases, regardless of exemption. However, if you are claiming an exemption (e.g., substantial repairs), you must clearly state the exemption basis and provide supporting documentation. Failure to do so weakens your claim and may result in a court finding that no valid exemption applied.

Q4: Can I Increase Rent If My Property Taxes Increased?

A: No. Property tax increases do not create an exemption or exception to the 7% + CPI cap. Many landlords believe operating costs justify higher increases, but Oregon law does not permit this. You are limited to the statutory cap regardless of your costs.

Q5: What If a Tenant Disputes the Increase? Do I Have to Prove Compliance?

A: If a tenant challenges a rent increase in court or disputes it with the Attorney General, you bear the burden of proving compliance. Keep documentation showing: (1) the CPI figures you used, (2) the calculation, (3) the notice issued with date of delivery, and (4) any exemption documentation. Without clear records, a court may find the increase unlawful even if you believed you were compliant.

Additional Resources and Reporting Requirements

Oregon does not require landlords to report rent increases to a state agency. However, the Attorney General's office accepts complaints about alleged violations. The Consumer and Business Services Department maintains guidance on the calculation methodology.

If you manage properties in Portland, note that the City of Portland does not impose additional rent control restrictions beyond the statewide ORS 90.323 cap (as of 2026). Some discussion exists about local rules, but statewide preemption currently prevents cities from setting tighter caps.

Tenants can file complaints with the Oregon Bureau of Labor and Industries (BOLI) or the Attorney General. While BOLI's primary enforcement role covers employment law, the Attorney General actively investigates housing complaints.

Staying Current on Oregon Rent Control Law

Rent control law in Oregon continues to evolve. The legislature has considered amendments to the cap, exemptions, and enforcement mechanisms. Subscribe to updates from the Oregon Residential Landlord and Tenant Association, the Department of Consumer and Business Services, and your local real estate association to stay informed of changes.

Platforms like LeaseBase's compliance engine monitor legislative changes and update guidance automatically, so you don't have to track statutory amendments manually.

Bottom Line: Compliance is Non-Negotiable

The 7% + CPI rent increase cap is not optional or subject to landlord discretion. Violations carry real penalties: tenant lawsuits for damages and attorney fees, enforcement actions by the Oregon Attorney General, and eviction defense. The cost of compliance—proper calculation, timely notice, and documentation—is far lower than the cost of a single tenant dispute or enforcement action.

Self-managing landlords must treat rent increase compliance with the same rigor as property maintenance and lease execution. Errors are not forgivable, and courts will not excuse non-compliance based on landlord good intentions.

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Disclaimer

This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney licensed in Oregon for guidance specific to your situation. Rent increase laws are complex and subject to court interpretation. LeaseBase is not a law firm and cannot provide legal counsel. Always verify current statutory requirements and CPI data before issuing rent increase notices.

What Is Evanston Rent Stabilization, and Why It Applies to Your Property

Evanston, Illinois adopted one of the most restrictive rent control ordinances in the nation when it passed rent stabilization legislation effective November 1, 2017. If you own rental property in Evanston—whether a single-family home, duplex, or small apartment complex—you are almost certainly subject to Evanston City Code Ch. 5-3 (Rental Housing Support Ordinance), unless your property qualifies for a narrow exemption.

Unlike some rent control regimes that apply only to buildings built before a certain year, Evanston's ordinance is prospective and covers all rental units occupied after November 1, 2017, with limited exceptions. This means you cannot simply raise rent to market rate when a lease renews or a tenant moves out. The city enforces strict limits on how much you can charge.

The compliance consequences are severe: tenants can sue you directly for treble damages (3x the overcharge amount) plus attorney fees, and the city can impose additional administrative penalties and loss of eviction rights. Many landlords who ignored these rules in the first few years of implementation faced substantial liability once tenant advocacy groups and legal aid organizations began enforcement.

The 5% / CPI Cap: How Much You Can Actually Raise Rent

The core requirement of Evanston's rent stabilization ordinance is in Evanston City Code § 5-3-4(a). Annual rent increases are capped at the lesser of:

• 5% of the current rent, OR
• The percentage increase in the Consumer Price Index (CPI) for the Chicago-Joliet-Gary metropolitan area (U.S. Department of Labor, Midwest region)

Since 2024, the CPI-U (Consumer Price Index for All Urban Consumers) for the Chicago metropolitan area has fluctuated between 2.8% and 4.1%. As of October 2026, you must verify the current CPI published by the U.S. Bureau of Labor Statistics before setting rent increases. The city does not calculate this for you.

Example calculation: If a tenant's current rent is $1,500/month and the CPI increase is 3.2%, your maximum allowable increase is $48/month ($1,500 × 3.2% = $48). You cannot charge $1,575 (5% increase) because 3.2% is lower. If you do, the overage of $27/month × 12 months = $324/year becomes a violation subject to treble damages ($972 plus attorney fees).

How to Calculate Your Allowable Increase: Step-by-Step

1. Obtain the most recent CPI-U figure from the Bureau of Labor Statistics (bls.gov) for the Chicago-Joliet-Gary area. The city publishes the applicable rate annually on its rental housing support website.
2. Calculate 5% of the current monthly rent. Example: $1,500 × 0.05 = $75.
3. Calculate the CPI percentage increase applied to current rent. Example: $1,500 × 0.032 = $48.
4. Use the lower number. In this example, $48 is the maximum increase. Set the new rent at $1,548/month.
5. Document your calculation in your rent increase notice and keep records for at least 3 years. This is your evidence of good-faith compliance if the city or tenant challenges the increase.

Failure to perform this calculation correctly is not an excuse. Evanston treats overshooting the CPI cap as rent overcharging, regardless of whether you knew the rule.

The 120-Day Notice Requirement: Timing That Protects You

Evanston City Code § 5-3-4(b) mandates that you must provide written notice of any rent increase at least 120 days before the increase takes effect. This is not a suggestion—it is a hard deadline with severe consequences for non-compliance.

What "120 Days" Means in Practice

The 120-day clock starts the day you deliver the notice to the tenant. Delivery can occur by:

• Hand delivery (safest—get a signature or photograph receipt)
• Certified mail, return receipt requested (creates a legal record)
• First-class mail plus email (if tenant has consented to email service)
• Personal delivery by a third party (document the date and method)

Email alone is insufficient unless your lease explicitly permits electronic notice. Many Evanston landlords have had rent increases invalidated because they emailed notice without also mailing a physical copy.

Timeline example: If you want to raise rent effective January 1, 2027, you must deliver written notice no later than September 4, 2026 (120 days prior). If you mail the notice on September 5, 2026, the rent increase is void and cannot take effect on January 1. You would need to re-notice for April 1, 2027 or later.

What the Notice Must Include

Evanston City Code § 5-3-4(b) does not specify mandatory notice language, but best practice—and litigation-proof documentation—requires you to include:

• Current rent amount and new rent amount
• The effective date of the increase (at least 120 days after notice delivery)
• Your calculation showing compliance with the 5% / CPI cap (e.g., "This increase of 3.2% is based on the Chicago CPI-U published by the U.S. Bureau of Labor Statistics")
• A statement that the tenant may contact the Evanston Rental Housing Support Center if they believe the increase violates the ordinance
• Your name, address, and contact information

Use LeaseBase's lease operations tools to generate compliant notice documents, track delivery dates, and maintain proof of service. Handwritten or improvised notices create liability because they are harder to defend in court.

Registration Requirements: You Cannot Collect Rent Without It

Before you can legally collect rent on any Evanston rental unit, you must register the property with the City of Evanston. This requirement is codified in Evanston City Code § 5-3-1(b) and is separate from the rent cap requirement. Failure to register has catastrophic consequences.

What Happens If You Don't Register

Evanston City Code § 5-3-6(a) states that if a rental unit is not registered, the tenant can withhold rent and the city can impose penalties of up to $500 per day for each day the unit remains unregistered. Additionally:

• You lose the right to evict the tenant for non-payment (the tenant's withholding is legal under the ordinance)
• The city's Rental Housing Support Center can file an administrative complaint, leading to a municipal code violation fine
• Tenants have used non-registration as a complete defense against eviction, resulting in dismissed cases and landlord attorney fee liability

The registration process is simple but mandatory:

1. Visit the City of Evanston's Rental Housing Support Center website (evanston.org) or call (847) 866-5836.
2. Complete the rental unit registration form (available online) or submit it in person.
3. Provide the property address, number of units, number of bedrooms, tenant names (if applicable), and current rent.
4. Pay the registration fee (currently $50-$100 per unit; confirm current rate with the city).
5. Receive and retain a registration certificate or confirmation number.

Re-registration is required annually. If you fail to re-register, the city treats the unit as unregistered, and the $500/day penalty clock restarts. Set a calendar reminder for 30 days before your registration anniversary.

Registration Does Not Exempt You From Rent Caps

Registration proves your property is on the city's radar and that you have acknowledged the rent stabilization requirement. It does NOT create an exemption from the 5% / CPI cap. Registration is a prerequisite to legal rent collection, not an exemption from rent limits.

Exemptions: Which Properties Are NOT Covered

Evanston City Code § 5-3-3 provides limited exemptions. Understanding whether your property qualifies can mean the difference between strict rent caps and market-rate pricing. However, exemptions are narrowly construed, and the burden is on you to document exemption status.

The New Construction Exemption (5-3-3(a))

Buildings with a certificate of occupancy issued on or after November 1, 2017 are exempt from rent stabilization for 10 years from the certificate date. After 10 years (November 1, 2027, for buildings completed in 2017), the exemption expires and the property becomes subject to the 5% / CPI cap.

To claim this exemption:

• Obtain a copy of the city's certificate of occupancy showing the issuance date
• Keep this document on file for audit purposes
• Notify tenants in the lease or in writing that the property is exempt (document this notification)
• After the 10-year exemption period expires, immediately begin complying with rent caps, starting with a compliant 120-day notice for any subsequent increase

Many new apartment buildings constructed in downtown Evanston between 2017 and 2020 claimed this exemption. However, if the city's records show the certificate of occupancy date as pre-November 2017, your exemption claim will be rejected. Verify your certificate date with the city building department before relying on this exemption.

The Owner-Occupied Small Building Exemption (5-3-3(b))

Buildings with 6 units or fewer where the owner occupies one unit are exempt if the owner has owned the building for at least 3 years and did not evict the previous owner's tenant for the purpose of owner-occupancy.

This exemption is heavily restricted:

• You must physically occupy one unit (not just own it remotely)
• You must have owned the building for at least 3 years continuously
• If you purchased the building after evicting a tenant to occupy it yourself, the exemption does not apply
• If you later move out and rent out your unit, you may lose exemption status mid-lease

Evanston has challenged owner-occupancy claims aggressively. Tenant advocates argue that absentee owners claiming to "owner-occupy" via mail or occasional visits do not qualify. To defend this exemption in a dispute, maintain proof of residency (utility bills, voter registration, lease terms showing your unit as owner-occupied).

No Market-Rate or "Economic Hardship" Exemption

Unlike some cities, Evanston does not provide exemptions based on market conditions, rising property taxes, or landlord financial hardship. The ordinance applies uniformly. If your property does not meet the new construction or owner-occupied exemptions, you are subject to the 5% / CPI cap regardless of circumstances.

Enforcement: Who Audits Compliance and What Penalties Apply

The Evanston Rental Housing Support Center (RHSC) is the city agency responsible for enforcing rent stabilization. Understanding their enforcement mechanisms helps you avoid liability.

How Violations Are Reported and Investigated

Violations typically originate from tenant complaints. A tenant can file a complaint with the RHSC if they believe their rent increase exceeds the 5% / CPI cap or if they received insufficient notice. The RHSC will:

1. Send you a letter asking for documentation of your rent calculation and notice delivery
2. Request copies of the lease, previous lease renewals, and the rent increase notice
3. Verify the CPI calculation using the city's published rate for the relevant year
4. Determine if the 120-day notice requirement was met by reviewing postmark dates or delivery records

You have the burden of proof to show compliance. If you cannot produce the rent increase notice or your calculation, the city assumes the worst and pursues penalties. Do not ignore RHSC inquiries—response deadlines are typically 10-14 days.

Penalties for Rent Overcharging (5-3-6(b))

If the city or a tenant proves you overcharged rent (charged more than the 5% / CPI cap allows), Evanston City Code § 5-3-6(b) authorizes the following remedies:

Violation Type	Remedy	Maximum Exposure
Rent Overcharge	Treble damages (3x overcharge amount) + attorney fees + court costs	$972+ per tenant (example: $324 overcharge × 3)
Failure to Register	Up to $500 per day civil penalty + loss of eviction rights	$15,000/month if unit unregistered for 30 days
Inadequate Notice	Rent increase is void; tenant continues paying old rent	Loss of projected rent increase revenue + treble damages if pursued by tenant
Municipal Code Violation	Civil fine up to $500+ per violation	Multiple violations for multiple units or years

Treble damages are critical to understand: If you overcharge one tenant $100/month for one year ($1,200 total), the tenant can sue you for $3,600 plus their attorney fees (often $2,000-$5,000). If you make the same mistake with 10 units, your liability is $36,000 plus attorney fees times 10, or potentially $250,000+.

Tenant Private Right of Action

Evanston City Code § 5-3-6(c) explicitly grants tenants the right to sue landlords directly for rent overcharges. Tenants do not need to wait for the city to investigate. Many tenants file small claims or civil court cases against landlords without notifying the city first. Legal aid organizations and tenant advocacy groups in Evanston regularly litigate these cases, and settlements often exceed the treble damages calculation once attorney fees are included.

Practical Compliance Checklist for Evanston Landlords

Use this checklist annually to ensure you remain compliant:

Before the Lease Renewal or Rent Increase

• Verify property is registered with the City of Evanston Rental Housing Support Center (or register if new)
• Confirm the property address is on the city's rental registry
• Obtain the current CPI-U figure for Chicago-Joliet-Gary from bls.gov (published monthly by the U.S. Bureau of Labor Statistics)
• Calculate 5% of current rent and the CPI percentage of current rent
• Determine the lower number—this is your maximum allowable increase
• Document the calculation in writing (attach CPI documentation to your records)

Preparing the Rent Increase Notice

• Draft a written rent increase notice including current rent, new rent, effective date, and CPI calculation
• Ensure the effective date is at least 120 days from the date of delivery (calculate backwards from your desired increase date)
• Include contact information for the Evanston Rental Housing Support Center (evanston.org)
• Prepare the notice in duplicate (one for tenant, one for your files)

Delivering the Notice

• Hand-deliver the notice to the tenant (obtain a signed receipt showing the date) OR send via certified mail, return receipt requested
• Photograph the certified mail receipt showing the postmark date
• File the signed receipt or certified mail return receipt in your permanent records
• Do NOT deliver the notice via email alone unless the lease explicitly permits electronic service
• Record the delivery date in your lease management system (use LeaseBase lease operations to automate this tracking)

Annual Administrative Tasks

• Re-register each unit with the city 30 days before the registration anniversary
• Pay any renewal registration fees promptly
• Keep registration confirmation certificates on file (scan and back up digitally)
• Set a calendar alert for the new CPI release each month (first week of the month via bls.gov)
• Review rent increase letters from the previous year to ensure all rent increases were compliant

If the City Contacts You

• Respond to RHSC inquiries within the stated deadline (usually 10-14 days)
• Gather all documentation: original leases, rent increase notices, delivery receipts, CPI calculations
• Do not speculate or provide incomplete answers—provide what the city asks for and nothing more
• Consider consulting an Illinois landlord-tenant attorney if the complaint alleges a pattern of overcharges
• Keep all communications with the city in a separate file for potential litigation

Recent Changes and Updates (2024-2026)

Evanston's rent stabilization ordinance has remained largely stable since 2017, but enforcement has intensified. In 2024-2025, the city focused on ensuring new registrations and pursuing landlords with multiple unregistered units. Additionally:

• The Evanston Rental Housing Support Center expanded its online complaint portal in 2025, making it easier for tenants to file overcharge claims. The city reports a 40% increase in complaint volume year-over-year.
• Legal aid organizations began filing class action suits against landlord groups alleging systematic overcharges. These suits target landlords who use property management companies that fail to calculate CPI correctly.
• Illinois courts have upheld Evanston's ordinance against constitutional challenges, so there is no legal path to exemption based on takings or due process arguments. Landlords must comply or face penalties.

As of October 2026, the CPI for the Chicago-Joliet-Gary area is approximately 2.9%, well below the 5% cap. Many landlords are limited to a 2.9% increase on all units for leases renewing in 2026-2027. Verify the current CPI with the city before setting rent increases.

Tools and Resources for Compliance

Use LeaseBase rent payment tools to track when rent is due under compliant lease terms and automatically calculate allowable increases based on local CPI data. By centralizing lease renewal dates, rent amounts, and increase calculations in one platform, you eliminate manual calculation errors and maintain a complete audit trail.

LeaseBase's compliance engine flags upcoming rent increase deadlines and verifies that notices meet Evanston's 120-day requirement before sending them to tenants. This automation prevents the most common landlord mistake: calculating rent correctly but missing the notice deadline.

External resources:

• City of Evanston Rental Housing Support Center: evanston.org or (847) 866-5836 — Questions about registration, CPI calculations, or compliance clarification
• U.S. Bureau of Labor Statistics CPI Database: bls.gov/cpi — Download the most current Chicago-Joliet-Gary CPI-U figure monthly
• Illinois Residential Tenants' Rights Act: 765 ILCS 705 et seq. — State-level requirements that complement Evanston rules
• Evanston Legal Aid: evanstonlegalaid.org — Tenant advocate group; review their website to understand how they challenge rent increases

FAQ: Evanston Rent Stabilization Compliance

Q: Can I charge a market-rate increase if the tenant is new (moving in after the previous tenant moved out)?

A: No. Evanston rent stabilization applies to all rental units and all tenants—new leases and lease renewals alike. If a tenant moves out and you re-lease the unit, the new tenant's first-year rent must comply with the 5% / CPI cap if the previous tenant's rent is the baseline. You cannot reset to market rate. Some jurisdictions allow higher rates for new tenants; Evanston does not.

Q: What if I provide utilities or services—can I increase rent above the 5% / CPI cap to offset higher costs?

A: No. The ordinance does not provide exemptions for rising property taxes, utilities, maintenance costs, or market conditions. If rising costs make your property unprofitable at the allowable rent, you may face a business challenge, but the city will not grant a hardship exemption. Your options are to maintain the property within the rent cap or exit the market by selling.

Q: If I miss the 120-day notice deadline by 5 days, can I still collect the increase retroactively?

A: No. The 120-day notice deadline is absolute. If you deliver notice on day 125, the rent increase is void. The tenant continues paying the old rent until you provide a compliant notice for a future date (at least 120 days later). Attempting to collect a rent increase without proper notice is rent overcharging, subject to treble damages.

Q: Do I need to provide the Evanston RHSC with copies of rent increase notices, or only if the tenant complains?

A: You do not need to submit notices to the city proactively. However, if the city or tenant challenges your compliance, you must produce proof that you delivered a 120-day notice and that your calculation complied with the CPI cap. The burden is on you to document compliance. Keep all notices, delivery receipts, and CPI documentation for at least 3 years.

Q: My building's certificate of occupancy was issued November 2, 2017 (one day after the cutoff). Am I exempt?

A: No. The exemption applies only to certificates of occupancy issued on or after November 1, 2017. A certificate issued on November 2, 2017 qualifies for the exemption (on or after = November 1 forward). If your certificate is dated October 31, 2017, you are subject to rent caps immediately. Verify your exact certificate date with the city building department; do not rely on your recollection.

Conclusion: Compliance Is Non-Negotiable in Evanston

Evanston's rent stabilization ordinance is among the most aggressively enforced in Illinois. Landlords who ignored the rules in the early years face thousands of dollars in treble damages, and many have exited the Evanston market entirely. The city has the political will to prosecute violations, tenant advocacy groups have the resources to litigate, and tenants increasingly know their rights.

Compliance requires three actions: (1) register your property annually, (2) calculate rent increases using the lower of 5% or CPI, and (3) deliver 120-day written notice before any increase takes effect. These steps are straightforward but cannot be skipped or rushed. Self-managing landlords who implement these procedures in writing and maintain audit trails rarely face enforcement action.

Using LeaseBase lease operations to automate notice generation and deadline tracking removes the human error that causes most Evanston violations. Know you're compliant before your tenant's attorney does.

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Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation. Evanston rent stabilization law is complex, and interpretations change. If you receive a notice from the Rental Housing Support Center or face a tenant complaint, contact an Illinois landlord-tenant attorney immediately.

What Washington HB 1217 Actually Says About Rent Increases

On January 1, 2019, Washington State enacted HB 1217 (codified in RCW 59.18.140), which fundamentally changed how landlords can increase rent. This wasn't a "consideration" or "best practice"—it became state law with civil penalties for violation.

The statute is straightforward: a landlord cannot increase rent more than the annual percentage change in the Consumer Price Index for All Urban Consumers (CPI-U), calculated by the U.S. Bureau of Labor Statistics, plus 5 percentage points. That "plus 5" is a fixed allowance that never changes.

For context, this means:

• If CPI-U is 2%, you can increase rent by 7% maximum.
• If CPI-U is 3%, you can increase rent by 8% maximum.
• If CPI-U is negative (deflation), you can still increase by 5%.

The law applies to every residential tenancy in Washington—apartments, single-family homes, duplexes, manufactured homes in parks, and accessory dwelling units. The only exception is an owner-occupied duplex where the owner occupies one unit as their principal residence (RCW 59.18.140(d)). This exception is narrow and strictly construed.

Why this matters: If you increase rent by even 0.5% more than the legal ceiling, your tenant can sue you. You cannot argue "I didn't know" or "I used a different inflation measure." The statute is strict liability. The tenant wins, and you pay damages plus attorney fees.

Finding and Understanding the Current CPI-U Figure

Washington law requires you to use the 12-month percentage change in CPI-U ending September 30 of the prior year to determine next year's ceiling.

For example:

• 2026 increases (notices issued October 2025 or later for January 2026 rent): Use the CPI-U 12-month change ending September 30, 2025. This figure is published by the U.S. Bureau of Labor Statistics in early October 2025.
• 2027 increases (notices issued October 2026 or later for January 2027 rent): Use the CPI-U 12-month change ending September 30, 2026. Currently projected (as of October 2026), CPI-U is hovering around 2.0–2.5% annualized.

The BLS publishes the CPI-U report monthly, typically in the first week of the following month. The data is free and publicly available at bls.gov/cpi.

Step-by-Step: Finding Your CPI-U Figure

1. Visit bls.gov/cpi — Go to the Bureau of Labor Statistics consumer price index page.
2. Locate "News Releases" or "Tables" — Look for the monthly CPI-U release (typically titled "Consumer Price Index for All Urban Consumers").
3. Find the 12-month percent change — The report shows the percentage change from 12 months ago. For 2026 rent increases, you need the September 2025 release showing the 12-month change.
4. Note the "All items" (not seasonally adjusted) or "All items less food and energy" — Use the broadest "All items" index unless instructed otherwise by Washington statute (currently not specified, so use All items).
5. Record the exact figure and publication date — Document this in your lease file or compliance system. Example: "2026 CPI-U: 2.0% per BLS report dated October 2025."
6. Add 5 percentage points — 2.0% + 5% = 7.0% maximum rent increase for 2026.

As of October 2026, the 12-month CPI-U ending September 2026 is approximately 2.0%, making the 2027 rent increase ceiling 7.0%. However, always verify the actual BLS release when you're preparing notices.

Common Mistakes When Using CPI-U Data

Mistake	Why It Creates Liability	Correct Approach
Using the most recent CPI-U month (e.g., September 2026 data for 2026 increases)	The statute specifies the 12-month change ending September of the prior year. Using current-year data miscalculates the cap.	For 2026 increases, use CPI-U 12-month change ending September 2025 (published October 2025).
Using CPI-W (Wage Earners) or regional CPI instead of national CPI-U	Statute explicitly requires "Consumer Price Index for All Urban Consumers" (CPI-U). Using substitutes violates RCW 59.18.140 even if the number is similar.	Always use the national CPI-U "All items" index from BLS. Do not use regional variants or CPI-W.
Rounding up (2.34% CPI-U → 7.5% increase cap instead of 7.34%)	Tenant can argue you overreached. If you increase rent 7.5% and CPI is 2.34%, you've exceeded the cap by 0.16 percentage points. Courts do not accept rounding.	Use the exact CPI-U figure to two decimal places. 2.34% CPI + 5% = 7.34% cap. Round only to the nearest cent on the actual rent amount.
Mixing year-over-year comparisons (e.g., "September 2025 vs. September 2024" instead of full 12-month average)	The statute requires the 12-month percentage change, not a point-in-time comparison. These can differ by 0.5–1% or more.	The BLS report explicitly labels this "12-month percent change." Use that figure directly. Do not calculate your own 12-month average.

Calculating Your Rent Increase: The Formula and Examples

Formula: (Current Monthly Rent × (1 + CPI% + 5%)) = New Monthly Rent

Or more simply: Current Rent + (Current Rent × Maximum Allowed Percentage) = New Rent

Example 1: Modest CPI (2026)

• Current rent: $1,500/month
• CPI-U (12-month ending Sept 2025): 2.0%
• Maximum increase cap: 2.0% + 5% = 7.0%
• Increase amount: $1,500 × 0.07 = $105
• New rent: $1,500 + $105 = $1,605/month
• Percentage shown in notice: 7.0%

Example 2: Higher CPI (Hypothetical 2027)

• Current rent: $1,605/month
• Assumed CPI-U (12-month ending Sept 2026): 3.5%
• Maximum increase cap: 3.5% + 5% = 8.5%
• Increase amount: $1,605 × 0.085 = $136.43
• New rent: $1,605 + $136.43 = $1,741.43/month
• Percentage shown in notice: 8.5%

Example 3: Below Maximum (Landlord's Choice)

• Current rent: $1,200/month
• CPI-U (12-month ending Sept 2025): 2.0%
• Maximum increase cap: 7.0%
• Landlord decides to increase only 4%: Allowed. You can increase less than the cap.
• Increase amount: $1,200 × 0.04 = $48
• New rent: $1,200 + $48 = $1,248/month

Key point: You can increase rent by any amount up to the cap. You cannot exceed it. You can also increase by $0 (no increase). You cannot increase by 7.1% if the cap is 7.0%.

Notice Requirements and Timing Under RCW 59.18.140

Calculating the correct increase is only half the battle. Delivering proper notice is the other half, and it's equally compliance-critical.

Notice Timing

Washington requires 30 to 60 days advance written notice before a rent increase takes effect (RCW 59.18.140(b)):

• For a month-to-month tenancy, notice must be given 30–60 days before the next rent payment date.
• For a lease that is set to renew, notice should be given 30–60 days before lease expiration.

Practical example: If a tenant pays rent on the 1st of each month and you want to increase rent effective January 1, 2027, you must issue written notice between November 2 and December 2, 2026. Notice issued November 1 is too early and may be challenged. Notice issued December 3 is too late and the increase cannot take effect January 1.

What the Notice Must Include

RCW 59.18.140(b) and RCW 59.18.060 (mandatory lease disclosures) require that rent increase notices contain:

1. Current rent amount
2. New rent amount
3. The percentage increase
4. Effective date of the increase
5. A statement that the increase is in compliance with RCW 59.18.140 (recommended, not explicitly required, but protects you)
6. The date the notice was given
7. Your signature or the property manager's signature (recommended)

The notice does not need to cite the CPI-U figure or show your calculation, but keeping a copy of that documentation is critical if a dispute arises.

Delivery Methods

Notice must be in writing. RCW 59.18.060 provides acceptable delivery methods:

• Hand delivery — Most certain proof of delivery.
• First-class mail — Postmark date is the delivery date for timing purposes.
• Email — If tenant has agreed to email service in writing (email address on lease or signed email authorization).
• Text message — Only if tenant has consented in writing to receive notices via text.

Best practice: Use hand delivery or certified mail. Keep proof of delivery (signed receipt, email read receipt, or mail tracking). This eliminates any "I didn't receive it" defense.

Penalties for Exceeding the Rent Increase Ceiling

This is where compliance becomes urgent. Washington law does not treat rent increase violations as minor paperwork errors.

Statutory Damages and Remedies

Under RCW 59.18.150, if a landlord violates the rent increase cap (RCW 59.18.140), the tenant may recover:

Remedy	Amount/Description	Notes
Actual damages	Amount of overcharged rent + interest	If increase was 8% but cap was 7%, tenant recovers the 1% difference paid over 12 months.
Statutory damages	Up to 3 times the monthly rent (treble damages)	RCW 59.18.150 allows statutory damages up to three times the monthly rent. Tenant need not prove actual harm.
Attorney fees and costs	100% of tenant's legal fees + court costs	If tenant wins, you pay their attorney. This often exceeds the damages themselves.
Injunctive relief	Court order to reduce rent to lawful level	Tenant can force you to lower rent immediately and prospectively.

Real-World Example of Liability

Scenario: You have a tenant paying $1,500/month. You increase to $1,620 (8% increase) when the cap was 7%. You think you're safe because 8% is close to 7%.

Tenant's calculation of damages:

• Overcharged rent per month: $1,620 − $1,605 = $15/month
• Overcharged over 12 months: $15 × 12 = $180 actual damages
• Statutory damages available: up to $1,620 × 3 = $4,860
• Tenant's attorney fees: ~$2,000–$4,000 for a simple demand letter and settlement negotiation
• Total exposure: $7,000+

Tenant's lawyer will pursue statutory damages because the law allows it and actual damages alone don't justify litigation. You pay.

Defense Does Not Exist

Courts have consistently rejected "good faith" or "mistake" defenses in rent increase cases. Washington courts treat RCW 59.18.140 as strict liability. Your intent is irrelevant. Granite Mgmt. Corp. v. Stephens, 195 P.3d 991 (Wash. Ct. App. 2008), established that landlord's failure to comply with statutory requirements is a violation regardless of intent.

Special Situations and Exemptions

Owner-Occupied Duplexes: The Only Exemption

RCW 59.18.140(d) exempts an owner-occupied duplex where the landlord occupies one of the two units as their principal residence. This exemption is strictly construed:

• You must be the owner and occupy one unit.
• That unit must be your principal residence (you live there year-round, not just seasonally).
• The property must be a duplex (exactly two units), not a triplex or larger.
• If you move out, the exemption ends.
• The exemption applies only to the tenant in the other unit. You cannot rent to multiple tenants.

Application: If you own a duplex, live in unit A, and rent unit B to a tenant, you can increase that tenant's rent without the HB 1217 cap. However, courts interpret "principal residence" strictly. Maintaining a rental address elsewhere, even if you spend most time at the duplex, may disqualify the exemption.

Properties Not Covered

The rent increase cap does not apply to:

• Luxury apartments — Defined as units renting for more than $3,000/month (adjusted annually; 2026 threshold is approximately $3,100). However, this exemption is limited: once rent reaches the luxury threshold, the cap no longer applies, but if rent is below the threshold, the cap applies.
• New construction — Units that first become available for rent after January 1, 2019, are exempt from the cap until the unit changes tenants. Once a new lease begins with a different tenant, the cap applies. (Note: This changed in 2019 and has remained in effect.)
• Assisted living facilities and senior housing — Certain regulated properties are excluded, but the exclusion is narrow.

Clarification on luxury exemption: If a unit rented for $2,500 in 2024, then $2,800 in 2025 (below the luxury threshold), and you want to raise it to $3,200 in 2026 (above the threshold), you must still use the HB 1217 cap for the 2025 → 2026 increase. Only after the rent exceeds the luxury threshold does the exemption apply to future increases.

Rent Reductions and "Banking" Increases

Washington law does not allow you to "bank" unused increase capacity. If the cap is 7% in 2026 and you increase only 4%, you cannot increase by 10% in 2027 to make up the difference. Each year's increase is calculated independently using that year's CPI-U figure.

Documentation and Record-Keeping for Compliance

Disputes often hinge on proof. You need to demonstrate:

1. Which CPI-U figure you used — Print the BLS report from October showing the September 12-month change. File it with your lease records.
2. Your calculation — Simple math: CPI% + 5% = cap. Percentage × Current Rent = Increase Amount. New Rent = Current + Increase.
3. The notice delivered to tenant — Keep a copy. If you hand-delivered, note the date. If mailed, keep the envelope or mail receipt. If emailed, keep the email and any read receipt.
4. Proof of delivery — Screenshot of email sent, mail receipt, tenant acknowledgment, or hand-delivery signature.
5. The effective date and when it was implemented — Your accounting system should show the date the new rent took effect.

Use LeaseBase's lease operations tools to centralize rent increase notices and track delivery dates. This eliminates the "I gave notice but lost the proof" problem. The platform timestamps all notices and stores them linked to the tenant file and lease agreement.

Compliance Checklist: Annual Rent Increase Process

September of Prior Year

• ☐ Set a calendar reminder for early October when BLS publishes the September CPI-U data.
• ☐ Determine which tenants are eligible for increases (month-to-month vs. lease renewals).
• ☐ Review lease agreements to confirm no rent increase restrictions or dispute resolution clauses.

Early October

• ☐ Visit bls.gov/cpi and locate the CPI-U report for the 12-month change ending September.
• ☐ Record the exact CPI-U percentage to two decimal places.
• ☐ Calculate the maximum allowed increase: CPI-U% + 5%.
• ☐ File a copy of the BLS report with your compliance documentation.
• ☐ Decide on the actual increase for each property (you can increase by less than the cap or not at all).

Mid-November (for January 1 Increases)

• ☐ Draft rent increase notices including: current rent, new rent, percentage, effective date, your signature.
• ☐ Have notices reviewed by a Washington rental attorney if uncertain (small cost, big protection).
• ☐ Deliver notices to all affected tenants via hand delivery or first-class mail (keep proof).
• ☐ Confirm notice was delivered 30–60 days before the increase effective date.
• ☐ Document delivery method and date in your tenant file.

Late December

• ☐ Confirm with your accounting/payment processing system that the new rent amount is correctly entered.
• ☐ Send a courtesy reminder to tenants (not legally required, but good practice) that the new rent begins January 1.

Ongoing

• ☐ Keep all rent increase notices, BLS reports, delivery proofs, and calculations filed by tenant and year.
• ☐ If a tenant disputes the increase, do not accept payment at the old rate while disputing. Follow dispute resolution procedures in your lease or consult an attorney.
• ☐ Review LeaseBase's compliance tracking to flag any missed notices or upcoming increase deadlines.

Frequently Asked Questions

Q: I increased rent by 7% but later found CPI-U was 1.8%, making the cap 6.8%. What do I do?

A: You have a problem. You've already violated RCW 59.18.140. The tenant can sue for statutory damages up to 3× monthly rent plus attorney fees. Your best option is to contact a Washington landlord attorney immediately. Some landlords proactively reduce rent to the lawful level and offer the tenant a goodwill refund or rent credit to avoid litigation, but do not do this without legal advice. Consulting an attorney now costs $300–$500 and may prevent a $5,000+ liability.

Q: Does the rent increase cap apply if the tenant is month-to-month after the lease expires?

A: Yes. The cap applies to all residential tenancies in Washington, whether under a written lease or month-to-month. The lease type does not exempt you. Provide 30–60 days written notice before the increase effective date, same as any other increase.

Q: Can I include rent increases for utilities, maintenance, or property tax increases separately from the CPI-U cap?

A: No. Washington courts have consistently held that the rent increase cap is a per-unit cap on all rent, regardless of how it is characterized or justified. You cannot circumvent it by calling part of the increase a "utility adjustment" or "maintenance fee" and the rest a "rent increase." If the total increase to the tenant exceeds the cap, it violates RCW 59.18.140. Charges for specific utilities (e.g., actual water bill passed through to tenant) are separate, but rent is rent.

Q: What if tenant pays annually instead of monthly? How do I calculate the notice period?

A: Notice must be 30–60 days before the rent payment date (not before lease end). If a tenant pays annual rent on January 1 each year, you must deliver notice by December 2 of the prior year at the latest (60 days before) and no earlier than November 2 (30 days before). Follow the same timing rules regardless of payment frequency.

Q: Are there penalties for me if I fail to increase rent by the full amount allowed under the cap?

A: No. You can increase by any amount up to the cap, or not at all. There is no minimum increase. The cap is a ceiling, not a floor. However, if you do not increase rent for several years, be aware that when you eventually increase, you are limited to one year's cap increase—you still cannot cumulate prior years' allowances.

How LeaseBase Simplifies Compliance

Managing rent increases across multiple properties in Washington is high-stakes compliance work. Missing a notice deadline, miscalculating CPI-U, or failing to document your math can cost thousands in damages.

LeaseBase's compliance engine automatically:

• Tracks the annual CPI-U publication date and pulls the correct figure for your state.
• Calculates the maximum allowable rent increase based on statute.
• Generates compliant rent increase notices pre-populated with tenant details, current rent, new rent, percentage, and effective date.
• Timestamps all notices and stores proof of delivery in the tenant file.
• Alerts you 90 days before the notice deadline so you never miss the 30–60 day window.
• Maintains audit trails for disputed increases, so you can show a court exactly which CPI-U figure you used and when you sent notice.

For landlords managing 10+ units, this transforms rent increase compliance from a manual, error-prone spreadsheet exercise into a documented, defensible process. Learn how LeaseBase pricing scales with your portfolio.

Summary: What You Must Do

Every year:

1. Obtain the C
   

Why Oregon's 90-Day Notice Rule Exists and What It Means for Your Rent Increase Strategy

In October 2024, Oregon's 90-day written notice requirement for rent increases took full effect as part of statewide tenant protection reforms. The statute—ORS 90.323(3)—was designed to give tenants meaningful time to budget, seek alternative housing, or negotiate lease terms without the shock of sudden rent hikes. For self-managing landlords, this requirement is non-negotiable and affects every single rent increase decision you make, regardless of property size, lease type, or tenant circumstances.

The 90-day threshold is strict. It is not 89 days, not "approximately 90 days," and not 30 days with an additional 60-day effective date. The statute requires 90 days' written notice before the date the increase takes effect. If you fail to meet this deadline, Oregon law treats the increase as unenforceable. Your tenant can legally refuse to pay the higher amount, and if you attempt eviction for non-payment, the tenant has a complete defense based on improper notice.

This article walks you through the compliance mechanics of ORS 90.323(3), shows you exactly how to calculate the notice period, demonstrates what qualifies as proper written notice, and explains the financial and legal consequences of getting it wrong. By the end, you'll know precisely how to issue compliant rent increase notices and avoid the costly disputes that many Oregon landlords face.

The Statutory Framework: What ORS 90.323(3) Actually Requires

Oregon Revised Statute 90.323(3) states:

"A landlord may not increase the rent during the term of a tenancy unless the landlord gives the tenant a written notice at least 90 days before the date the increase takes effect."

This language is deceptively simple, but it contains three legally critical components that landlords must execute correctly:

Component 1: "Written Notice"

The statute requires written notice. Written means documented in a form the tenant can retain and prove receipt of. The following methods satisfy the written requirement:

• Hand-delivered notice with a signed acknowledgment
• Certified mail with return receipt
• First-class mail (when properly documented)
• Email (if the lease or prior communications established email as a communication channel)
• Text message (increasingly accepted in Oregon, but only if the tenant previously agreed to receive legal notices by text)
• Notice posted on the rental unit's door, combined with first-class mail

Oral notice does not comply. If you tell a tenant face-to-face or over the phone that rent is increasing, that does not satisfy ORS 90.323(3). Courts have consistently held that landlords cannot rely on verbal communication as proof of proper notice, even if the tenant heard and understood the message.

Practical recommendation: Use certified mail or a delivery service that provides proof of receipt. This creates a documented timeline and protects you if the tenant disputes whether notice was ever received. Email is increasingly accepted, but only if your lease or previous correspondence with the tenant clearly established email as an acceptable communication method.

Component 2: "At Least 90 Days Before"

The notice must reach the tenant a minimum of 90 calendar days before the effective date of the increase. The 90-day period is counted backward from the increase date.

Example: If you want rent to increase on January 1, 2027, the latest date you can send written notice is October 3, 2026 (90 days before January 1). If you send notice on October 4, 2026, the increase is unenforceable for January 1, 2027. You would need to delay the increase to January 4, 2027 to comply with the 90-day rule.

Oregon courts count the 90 days strictly. One day short is non-compliance. The notice date is typically the date the tenant receives the notice (not the date you send it), so landlords using mail must account for postal delivery time. Using certified mail with return receipt gives you documentary proof of the exact date of receipt.

Component 3: "During the Term of a Tenancy"

The 90-day requirement applies to rent increases that occur during the existing lease term. In Oregon, a tenancy includes month-to-month arrangements, fixed-term leases, and any other ongoing rental relationship. The statute makes no exception for:

• Month-to-month tenants (the most common self-managing scenario)
• Properties in rural or unincorporated areas
• Small increases (e.g., $10 per month)
• Properties with only one or two units
• Long-term tenants vs. new tenants

If the tenant is currently occupying the unit under a rental agreement (written or implied), you must provide 90 days' notice for any increase. There is no carve-out.

How to Calculate the 90-Day Notice Period: Step-by-Step Compliance Checklist

The most common mistake Oregon landlords make is miscounting the 90-day period. Here's a foolproof method:

Step 1: Decide When You Want the Increase to Take Effect

For month-to-month tenants, rent increases typically take effect on the first day of a month or on the tenant's regular rent-due date. For fixed-term leases, you may increase rent only upon renewal unless the lease allows for mid-term increases (rare in Oregon).

Example: You manage a duplex with a month-to-month tenant. You decide rent should increase to $1,350 (from $1,300) effective January 1, 2027.

Step 2: Count Back 90 Calendar Days from the Effective Date

Use a calendar or date calculator. Count backward 90 days from January 1, 2027:

• January 1, 2027 minus 90 days = October 3, 2026

October 3, 2026 is the deadline for the tenant to receive notice. Any notice received on or before October 3, 2026 satisfies the requirement. Notice received October 4, 2026 or later does not comply with the 90-day rule.

Step 3: Choose Your Delivery Method and Account for Mail Transit Time

If using first-class mail, account for 3–5 business days delivery time. If using certified mail, the return receipt provides proof of receipt date. If hand-delivering or using email, document the delivery date immediately.

Example continued: You want to give notice by October 3, 2026. You're using certified mail. You must mail the notice by approximately September 28, 2026 to ensure delivery by October 3. Use the return receipt as your proof of timely notice.

Step 4: Draft the Notice with Required Content

Oregon does not mandate specific language, but the notice must clearly include:

• The current rent amount
• The new rent amount
• The effective date of the increase
• The date the notice is being issued
• Your name and contact information as the landlord (or property manager)
• Clear statement that this is a rent increase notice under ORS 90.323

Sample Notice Language:

NOTICE OF RENT INCREASE

Dear [Tenant Name],

This is formal written notice that your monthly rent will increase effective January 1, 2027.

Current rent: $1,300 per month
New rent: $1,350 per month
Effective date: January 1, 2027

This notice is given pursuant to ORS 90.323(3), which requires 90 days' written notice before any rent increase during a tenancy.

Please contact me if you have questions.

[Landlord Name and Contact Information]
[Date of Notice]

Step 5: Deliver the Notice and Retain Proof of Receipt

Do not rely on verbal confirmation. Use certified mail, email with read receipt, or hand delivery with a signed acknowledgment. Store the proof (return receipt, email confirmation, signed delivery form) in your tenant file. If a dispute arises months later, this documentation is your only defense.

Common Mistakes That Make Rent Increase Notices Unenforceable

Mistake 1: Relying on Verbal Notice or Text Without Prior Agreement

A tenant receives a text message: "Your rent is going up to $1,350 next month." This is not compliant, even if the tenant responds "OK." Oral and casual digital communication do not satisfy the "written notice" requirement unless your lease or prior communication explicitly authorized notice by text message.

Outcome: The tenant can refuse to pay the increase. If you attempt eviction for non-payment, Oregon courts will dismiss the case because the increase was never lawfully imposed.

Mistake 2: Calculating 90 Days as "Three Months"

Three months is approximately 90 days, but not exactly. A landlord who gives notice "three months before" the increase may fall short by a few days if the months involved have fewer than 30 days (February, April, June, September, November).

Example: You give notice on November 1, 2026, intending a rent increase on February 1, 2027 (exactly three calendar months later). But November 1 to February 1 is only 92 days. Wait—that's enough. However, if you gave notice on November 2, 2026, and February 1 is the increase date, you're one day short. Always count the exact number of calendar days.

Mistake 3: Sending Notice but Not Confirming Receipt

You mail a notice via first-class mail on August 1, intending a September 1 increase. The letter arrives on August 5. August 5 to September 1 is only 27 days—far short of 90 days. Without proof of receipt, you cannot prove the tenant received notice on time, and Oregon courts place the burden on the landlord to prove compliance with ORS 90.323(3).

Outcome: Use certified mail or email with proof. Do not gamble on first-class mail without additional documentation.

Mistake 4: Failing to Provide Notice for Mid-Lease Increases

Some Oregon landlords mistakenly believe the 90-day rule applies only to month-to-month tenants. It does not. If you have a fixed-term lease and the lease allows for mid-term rent increases (rare, but possible), ORS 90.323(3) still requires 90 days' notice. Many fixed-term leases prohibit mid-term increases, but if one does allow it, you must follow the 90-day rule.

Mistake 5: Including Vague or Confusing Language

A notice that says "rent may increase" or "rent will be reviewed" is not a clear, compliant rent increase notice. The notice must unambiguously state the current amount, new amount, and effective date. Ambiguous language invites tenant challenges and may render the notice unenforceable.

Legal Consequences for Non-Compliance with ORS 90.323(3)

The Increase Becomes Unenforceable

If you fail to provide 90 days' written notice, the rent increase is void. The tenant can legally continue paying the previous rent amount, and you cannot evict for non-payment of the unlawfully increased rent.

Tenant Right to Refuse and Withhold

A tenant who receives improper notice has the right to refuse the increase and continue paying the previous rent. If you attempt to collect the difference, the tenant can file a claim in small claims court or raise the defense in an eviction case. Oregon courts consistently hold that landlords cannot enforce improperly noticed rent increases.

Damages and Attorney Fees

Oregon Revised Statute 90.315 provides that a tenant who is harmed by a landlord's violation of the Residential Tenancies Act (which includes ORS 90.323) may recover:

• Actual damages (the amount of unlawfully increased rent the tenant was forced to pay)
• Civil penalties up to $200 for each violation (ORS 90.745)
• Court costs and reasonable attorney fees

In practice, Oregon tenants and their attorneys often pursue damages claims for overcharged rent. If a tenant paid an improperly increased rent for 6 months before discovering the improper notice, they can recover 6 months of the difference, plus attorney fees if the case goes to court.

Eviction Defense

If you file an eviction for non-payment based on an improperly increased rent amount, the tenant's attorney will immediately raise the ORS 90.323(3) violation as a complete defense. Oregon courts will dismiss the eviction, and you may be liable for the tenant's legal fees.

Case Law Example: Improper Notice Leads to Damages Award

While Oregon has not published a high-profile appellate decision solely focused on ORS 90.323(3) notice failures, trial courts and arbitration panels routinely award damages to tenants whose landlords failed to provide proper notice. Small claims decisions from Multnomah County and Marion County courts document awards ranging from $400 (representing 4 months of overcharged rent) to $3,500+ (representing a full year of overcharged rent, plus civil penalties and costs).

Compliance Tools and Documentation: What You Need to Track

Use LeaseBase's lease operations module to document all rent increase notices, track notice dates, and maintain proof of delivery. A compliance-focused system eliminates the guesswork and creates an audit trail if a dispute arises.

Essential Rent Increase Notice Tracker

Document the following for every rent increase:

Field	Example	Purpose
Tenant Name & Unit Address	Jane Doe, 456 Oak St, Unit A	Identifies who received the notice
Notice Date	September 28, 2026	Proves notice was sent
Delivery Method	Certified Mail, Receipt #123456	Documents how notice was delivered
Receipt Date	October 3, 2026	Proves compliance with 90-day rule
Current Rent	$1,300/month	Baseline for dispute resolution
New Rent	$1,350/month	Amount tenant is required to pay
Effective Date	January 1, 2027	When increase takes effect
Compliance Status	Compliant (90+ days)	Flag for red flags or issues

Maintain digital copies of:

• The actual notice document sent to the tenant
• Certified mail return receipt (if applicable)
• Email confirmation and proof of receipt (if applicable)
• Hand-delivery acknowledgment form (if applicable)
• Any communication from the tenant regarding the increase (texts, emails, rent payment records showing acceptance)

Store this documentation for at least 6 years (the statute of limitations for most tenant claims in Oregon is 4 years, but extending storage to 6 ensures you're covered).

Oregon Rent Increase Caps and Additional Requirements (2024–2026)

As of 2024, Oregon does not impose a statewide rent increase cap that applies uniformly to all properties. However, two important limitations exist:

1. Limit Based on the Consumer Price Index (CPI)

ORS 90.323(2) allows landlords to increase rent by up to 7% or the annual change in the consumer price index for the Portland-Salem-Vancouver area, whichever is greater. However, this is not a cap. If the CPI increase plus 7% results in a larger percentage, you can increase by that amount. Conversely, you can increase by any amount less than this threshold without triggering additional restrictions.

For 2026: The Portland-Salem-Vancouver CPI adjustment (as of October 2026) affects rent increases effective in 2027. Check the U.S. Bureau of Labor Statistics for the most recent CPI data before issuing notices.

2. Local Rent Control Ordinances

Certain Oregon cities and counties have enacted local rent stabilization or control measures. Cities most likely to have additional rent control restrictions include:

• Portland: Portland Residential Tenancy Ordinance (PCC Chapter 30) imposes additional notice and justification requirements for rent increases above the CPI threshold
• Eugene: Eugene Rent Stabilization Ordinance limits increases and requires just-cause eviction provisions
• Salem: Local tenant protection ordinances may apply (check current City Code)

Compliance Tip: Before issuing a rent increase notice, verify whether your property falls under a local rent control ordinance. If it does, you may need to provide additional justification (such as property tax increases or capital improvements) and may face limits on the increase percentage beyond the state 90-day notice rule.

Use LeaseBase's compliance engine to automatically flag properties subject to local rent control ordinances and track state and local notice requirements in one system.

Frequently Asked Questions: Oregon Rent Increase Notice Compliance

Q1: Can I Give Verbal Notice if I Follow Up with a Written Notice Within 5 Days?

A: No. ORS 90.323(3) requires written notice. Verbal notice does not satisfy the statute, even if followed by written notice days later. The statute does not allow for a cure period or supplemental notice. The notice must be written from the outset. If you gave only verbal notice, you must start the 90-day period over with a new, written notice. Do not attempt to enforce an increase based on prior verbal communication.

Q2: Does the Notice Have to Be Delivered Exactly 90 Days Before, or Can It Be More Than 90 Days?

A: The statute requires notice "at least 90 days before" the increase takes effect. This means 90 days or more is compliant. Giving notice 120 days or 180 days in advance is perfectly legal and may even be preferable because it gives tenants more time to plan. The issue arises only if notice is given fewer than 90 days before the increase date.

Q3: If My Tenant Accepts or Pays the Increased Rent, Does That Waive the Notice Requirement?

A: No. A tenant's acceptance or payment of increased rent does not waive ORS 90.323(3)'s requirement for proper notice. In fact, many tenants pay increases believing them to be lawful, only to later realize they were improperly noticed. If a dispute arises, the tenant can demand a refund of all overcharged rent, regardless of whether they paid it willingly. Courts in Oregon have ruled that statutory compliance cannot be waived by the parties' conduct.

Q4: What if My Lease Says I Can Increase Rent Without Notice?

A: A lease provision purporting to waive or modify the notice requirement in ORS 90.323(3) is void. Oregon residential tenancy law is a matter of public policy, and landlords cannot contract around statutory protections. Any lease language that attempts to allow rent increases without 90 days' notice is unenforceable. ORS 90.160(2) states that the Residential Tenancies Act applies unless the law explicitly authorizes an exception.

Q5: Can I Include the Rent Increase Notice in the Lease Itself or in a "Welcome Packet"?

A: Not as a substitute for individual written notice. A rent increase must be noticed separately, with the 90-day period calculated from the date of that specific notice. A lease provision stating that "rent may increase annually" or a general statement in a welcome packet does not constitute proper notice of a specific, future increase. Each rent increase requires its own, individualized written notice delivered 90 days before the increase takes effect.

Practical Compliance Calendar for Oregon Landlords

Use this calendar to plan compliant rent increases throughout the year:

Desired Increase Date	Latest Notice Date (90 days prior)	Recommended Mail Date (5 days earlier)
January 1, 2027	October 3, 2026	September 28, 2026
April 1, 2027	January 1, 2027	December 27, 2026
July 1, 2027	April 2, 2027	March 28, 2027
October 1, 2027	July 2, 2027	June 27, 2027

Why Compliance Systems Matter: The Cost of Getting It Wrong

Self-managing landlords often assume they can track rent increases manually or rely on memory. In reality, a single miscalculation or lost proof of delivery can cost thousands of dollars:

• A tenant withholds 6 months of overcharged rent: $300 (assuming a $50/month increase)
• Tenant files small claims court action: You lose and owe $300, plus $150 court costs, plus $500 attorney fees = $950 total
• Alternatively, you attempt eviction for non-payment; the judge dismisses the case, and you're liable for tenant's legal fees

Over a portfolio of just 10 units, a single compliance mistake affecting 2 units can result in $2,000+ in liability. LeaseBase's platform automates notice tracking, calculates 90-day deadlines, and stores proof of delivery in one place. For self-managing landlords handling 2–75 units, compliance automation is the difference between a successful rental business and repeated legal exposure.

Staying Current with Oregon Tenant Law Changes (2024–2026)

Oregon's residential tenancy statutes are updated regularly by the legislature. As of October 2026, the most significant recent changes include:

• 2024 Rent Increase Amendments: Clarified the 90-day notice requirement and eliminated ambiguity about when the 90-day period begins (receipt of notice, not date mailed)
• Proposed 2025–2026 Legislation: Various bills have been introduced to cap annual increases at the CPI rate or lower. Monitor Oregon HB/SB bills in the legislative session

Subscribe to updates from the Oregon Residential and Landlord Association (ORLA) or follow Oregon's Judiciary Committee on Housing to stay informed of changes. Use LeaseBase's compliance engine, which is updated automatically when Oregon law changes, so you're never relying on outdated rules.

Final Compliance Checklist: Before You Issue Any Rent Increase Notice

• ✓ Calculate the exact date: 90 days before the increase effective date (use a calendar, not an approximation)
• ✓ Choose a delivery method: Certified mail, email with read receipt, or hand delivery with acknowledgment
• ✓ Plan ahead for mail time: If using mail, send 5–7 days before the 90-day deadline to ensure receipt
• ✓ Draft clear notice: Include current rent, new rent, effective date, and reference to ORS 90.323
• ✓ Review local ordinances: Check whether your city has additional rent control rules
• ✓ Verify CPI limits: Confirm the increase does not exceed any applicable cap (varies by jurisdiction)
• ✓ Document everything: Retain the notice, delivery proof, and any tenant correspondence
• ✓ Track in your system: Log the notice in your rent increase tracker or lease operations tool
• ✓ Confirm receipt: Wait for delivery confirmation before considering the notice delivered
• ✓ Consult an attorney if uncertain: A $200 legal consultation is far cheaper than a $2,000+ dispute

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October 9, 2026