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Understanding ORS 90.323(2): The Statutory Rent Increase Formula

Oregon landlords often face confusion about whether they can raise rent and by how much. The answer lies in ORS 90.323(2), which establishes the maximum allowable rent increase tied directly to inflation data published by the U.S. Bureau of Labor Statistics.

The statute reads: “A landlord may not increase the rent for a dwelling unit unless the landlord provides the tenant with written notice of the increase at least 90 days before the date the increase becomes effective, except that a landlord may increase the rent for a dwelling unit without providing 90 days’ notice if the parties agree in writing to a shorter notice period.”

The critical compliance element is that the increase itself cannot exceed the annual percentage change in the Consumer Price Index for All Urban Consumers (CPI-U) for the Portland-Vancouver-Hillsboro metropolitan area, measured over the 12 months preceding the increase, with an absolute maximum of 10% regardless of CPI movement.

This is not discretionary. It is a hard statutory limit. An increase of 11% is unlawful even if you claim business hardship, rising expenses, or market conditions. The law places the burden on you to know and calculate the correct figure before serving notice.

How to Calculate Your Allowable 2026 Rent Increase

Step 1: Identify the Correct CPI Index

Oregon’s statute references the Consumer Price Index for All Urban Consumers (CPI-U) for the Portland-Vancouver-Hillsboro area. This is published monthly by the Bureau of Labor Statistics (BLS) under Series ID CUUR49RSA0, specifically the index for “All items in U.S. city average, all urban consumers, not seasonally adjusted.”

Do not use:

• National CPI data
• Seattle-Tacoma CPI (that is for Washington state under RCW 59.18.145)
• Eugene or Salem local indexes
• Seasonally adjusted indexes

Using the wrong index exposes you to claims that your increase was unlawful. The tenant’s attorney will cite the correct index, and a court will likely agree.

Step 2: Calculate the 12-Month Percentage Change

You must calculate the percentage change from the same month in the prior year to the same month in the current year. For 2026 rent increases effective January 1, 2026, you would compare the CPI-U value for December 2024 to December 2025.

The formula is:

Percentage Change = [(Current Month CPI – Prior Year Same Month CPI) ÷ Prior Year Same Month CPI] × 100

Example: If the Portland CPI-U for December 2025 is 320.50 and for December 2024 is 308.20:

(320.50 – 308.20) ÷ 308.20 = 0.0398 = 3.98%

Your allowable increase would be 3.98% (rounded to two decimal places).

Step 3: Apply the 10% Annual Cap

Even if the calculated CPI increase exceeds 10%, you cannot charge more than 10%. As of 2026, this cap remains in effect under ORS 90.323(2)(b).

If your calculated increase is 3.98%, you use 3.98%. If it were 12%, you would cap it at 10%.

Step 4: Document Your Calculation

Keep records showing:

• The CPI-U index values you used (with the BLS series ID)
• The 12-month period analyzed
• Your calculation showing the percentage change
• The date you performed the calculation
• A copy of the notice served on the tenant with the effective date

If the tenant challenges your increase, this documentation demonstrates compliance. Lacking it, you may struggle to prove the increase was lawful, and the tenant’s burden of proof shifts to you.

2026 CPI Data and Projected Allowable Increase

As of August 2026, the most recent 12-month CPI data available would be through July 2026. The Bureau of Labor Statistics publishes the Portland-Vancouver-Hillsboro CPI-U monthly, typically in the middle of the following month.

*Estimates are for illustration only. Verify actual BLS data before serving notice. Estimates are not reliable for compliance purposes.

To find the current Portland CPI-U data, visit the Bureau of Labor Statistics website and search for Series CUUR49RSA0.

Rent Increase Notice Requirements Under ORS 90.323(1)

90 Days’ Notice Required

A rent increase does not become effective when you decide it should. It becomes effective when your 90-day notice period expires. ORS 90.323(1) requires “written notice of the increase at least 90 days before the date the increase becomes effective.”

If you serve notice on October 1, the earliest effective date is January 1 (92 days later). Serving notice on September 1 for a January 1 effective date satisfies the statute. Serving it on September 2 for January 1 does not—you are one day short.

Notice Content Requirements

Oregon law does not specify the exact language required in a rent increase notice, but it must include:

• The current rent amount
• The new rent amount
• The effective date of the increase
• The date the notice was served
• Calculation or statement of the percentage increase (recommended for compliance defense)

Best practice is to include the CPI calculation method and the index values used. This demonstrates good faith and makes litigation expensive for the tenant—they cannot easily claim the increase was arbitrary.

Service Methods

Oregon does not require hand delivery. ORS 90.320(4) permits notice to be “delivered to the tenant personally or sent by mail in a manner that allows the landlord to determine when the mail is received.”

Acceptable methods:

• Hand delivery with signed receipt
• Certified mail with return receipt
• First-class mail (if tenant accepts—otherwise risky)
• Email if tenant has agreed to accept notices by email (in writing)

Do not rely on posting the notice on the door or gate. If the tenant claims they never received it, you cannot prove otherwise without a receipt or delivery confirmation.

Restrictions on Rent Increases During a Lease Term

Fixed-Term Leases

If the tenant is under a lease with a fixed end date (e.g., 12-month lease expiring June 30, 2027), you cannot raise rent before that date unless the lease explicitly permits it.

The lease may say something like: “Landlord may increase rent by the annual CPI adjustment, with 90 days’ notice, on each anniversary date.” If it does, you can do so. If it does not, you cannot.

When the lease expires and you are negotiating renewal, you can propose any increase you want. The tenant can accept, negotiate, or move out. However, if the tenant stays beyond the lease term and no new lease is signed, they become a month-to-month tenant, and the original terms still apply (including the original rent) unless both parties agree to change them.

Month-to-Month Tenancies

If a tenant is on a month-to-month lease or the fixed term has expired and they are continuing to pay (a continuation tenancy), you can increase rent with 90 days’ notice, subject to the CPI cap.

Example: A tenant’s 12-month lease expires August 31, 2026. They pay September 2026 rent but no new lease is signed. They are now month-to-month. You can serve a 90-day rent increase notice effective December 1, 2026 (89–91 days from service).

Penalties and Consequences for Non-Compliance

Unlawful Rent Increase Claims

If you violate the CPI limit or fail to provide 90 days’ notice, the tenant can sue under ORS 90.385 or assert an unlawful rent increase defense in an eviction case.

Statutory remedies include:

• Actual damages (the overcharge amount)
• Treble damages (actual damages × 3)
• Reasonable attorney fees and court costs
• Civil penalty (at the court’s discretion)

Example: You increase rent from $1,200 to $1,400 per month (16.7%) without proper CPI calculation. The allowable increase was 4%, meaning the lawful amount is $1,248. The overcharge is $152 per month. If rent remains unlawfully high for 12 months, the total overcharge is $1,824. The tenant can recover $5,472 (treble damages) plus attorney fees ($2,000–$5,000 typical) and costs. Your defense costs (your own attorney) are not recoverable.

Retaliation Claims

If you increase rent within 90 days after a tenant files a habitability complaint, requests repairs, or engages in legally protected activity (like joining a tenants’ union), the tenant can claim retaliation under ORS 90.385. You must prove the increase was not retaliatory. The burden shifts to you once the tenant shows temporal proximity (timing).

Administrative Enforcement

Oregon’s Bureau of Labor and Industries (BOLI) does not directly enforce rent increase violations, but the Attorney General’s Consumer Protection Division can address patterns of illegal increases affecting multiple tenants. Complaints to the AG are cost-free and can trigger investigation.

How to Defend Your Rent Increase in Court

If a tenant challenges your increase:

1. Produce the CPI calculation — Show the specific index values, the 12-month period, the formula, and the result. If you calculated 4.2%, show your work.
2. Prove notice delivery — Produce the certified mail receipt, delivery confirmation, or signed hand-delivery receipt showing the date served and the effective date stated in the notice.
3. Establish lease status — Prove whether the tenant was on a fixed-term lease, month-to-month, or a continuation tenancy at the time of notice.
4. Document the CPI source — Cite the Bureau of Labor Statistics series and the official monthly publication showing the index values you used. Print-outs from the BLS website dated before your notice serve as contemporaneous evidence.

Without this documentation, a judge will likely rule in favor of the tenant, especially if they have an attorney. Oregon courts view tenant protection statutes favorably and construe them against landlords.

Practical Compliance Checklist

Use this checklist before serving any rent increase notice:

Frequently Asked Questions

Q1: Can I increase rent during a lease if the lease says “rent increases annually by CPI”?

A: Yes, if the lease explicitly permits annual rent increases by CPI, you can serve the notice during the lease term and increase rent on the anniversary date specified in the lease. However, you still must follow the 90-day notice requirement if the lease does not shorten it, and you must comply with the CPI calculation and 10% cap. ORS 90.323(1) allows shorter notice periods only if both parties agree in writing beforehand.

Q2: What if the Portland CPI data is released late or unavailable?

A: The Bureau of Labor Statistics publishes Portland CPI-U data monthly. If data is delayed, wait for official publication before serving notice. Do not estimate or use preliminary data. If you serve notice based on incorrect CPI data and the final published number is lower, the tenant can sue for unlawful increase. The statute requires you to use the published index; guessing exposes you to liability.

Q3: If my lease expired and the tenant has been paying the same rent for six months as a month-to-month tenant, can I increase rent now?

A: Yes. A month-to-month tenancy is separate from the expired lease. You can serve a 90-day rent increase notice at any time, subject to the CPI cap and the retaliation rules. If the tenant has not filed complaints or engaged in protected activity in the prior 90 days, a retaliation defense is unlikely. However, if you denied repairs or ignored a habitability issue in the prior 90 days, and then immediately served a rent increase notice, the timing creates a retaliation claim. The tenant would bear the initial burden, but you would need to prove the increase was not retaliatory.

Q4: Can I charge a flat fee instead of calculating CPI?

A: No. ORS 90.323(2) caps increases at the CPI percentage change (or 10%, whichever is lower). You cannot circumvent this by charging a flat fee for a “lease renewal” or “administrative adjustment.” Any increase in the monthly rent is subject to the statute. Courts view such workarounds as unlawful attempts to evade the rent control statute.

Q5: What documentation do I need if the tenant sues over the increase?

A: You need: (1) a dated print-out from the BLS website showing the index values you used; (2) your written calculation showing the percentage change; (3) the signed or certified mail receipt proving service of the notice; (4) a copy of the notice showing the effective date and new rent amount; and (5) a copy of the lease or evidence of month-to-month status at the time of notice. Without these, a judge will likely rule the increase was unlawful, and you will owe treble damages and attorney fees.

Building a Compliance System for Recurring Increases

If you manage multiple units, you should establish a system to track rent increase eligibility and calculation dates each year. LeaseBase’s lease operations module tracks lease anniversaries and renewal dates, helping you identify which tenancies are month-to-month or about to transition. By centralizing this data, you avoid the error of increasing rent on a fixed-term lease or missing the 90-day notice deadline.

Additionally, LeaseBase’s compliance engine flags jurisdictional changes in rent control laws and alerts you to statute updates affecting your portfolio. Oregon’s rent control statute has evolved—staying current on amendments is critical.

For portfolio-wide insights, analytics and reporting can show you rent increase history, average increases by unit, and compliance metrics across your properties, reducing the risk of inadvertent violations.

Conclusion: The Cost of Miscalculation

A 1% error in rent increase calculation can cost you thousands in damages and attorney fees once litigation starts. A 5% increase when 4% is allowed results in a $60 monthly overcharge; over 12 months, the tenant recovers $2,160 in actual damages, but sues for $6,480 (treble) plus $3,500 in attorney fees. Your mistake now costs you $9,980, not including your own attorney time fighting the claim.

The safest approach is to pull the official BLS data, calculate precisely, document thoroughly, serve properly, and keep all records. A 15-minute calculation done correctly avoids years of potential litigation.

Oregon landlord-tenant law heavily favors tenants in rent increase disputes. The burden shifts to you once a tenant challenges the increase. Compliance is your only defense.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified Oregon attorney for guidance specific to your situation. Rent control laws change, and interpretations vary by county. This article reflects law as of August 2026 and is subject to updates.

What HB 1217 Actually Changed in Washington Rent Law

In May 2023, Washington Governor Jay Inslee signed HB 1217 into law, establishing the first statewide rent increase cap in Washington history. This law took effect January 1, 2024, and fundamentally changed how self-managing landlords calculate annual rent increases. Unlike California’s strict rent-control regime or Oregon’s similar formula-based system, Washington’s approach uses a dual-ceiling model: you cannot increase rent more than 7% in any 12-month period, and you cannot increase more than the CPI-U plus 1%.

The practical impact: if CPI-U is 3.5%, your maximum allowable increase is 4.5%. If CPI-U is 6.5%, your ceiling is capped at 7% (not 7.5%). If CPI-U somehow reaches 8%, you’re still limited to 7%.

Before HB 1217, Washington landlords could raise rent without statutory limits (apart from the requirement to provide notice). This created exposure for tenants facing double-digit increases in tight markets. The law was a direct response to statewide housing affordability crises, particularly in King, Pierce, and Snohomish counties.

The enforcement mechanism is what makes HB 1217 potent for your compliance risk: tenants don’t need to file complaints with government agencies. They can sue you directly in civil court, and if they prevail, you owe damages equal to 3 times the overcharge plus actual attorney fees and court costs. A $200/month illegal increase sustained over 12 months becomes a $7,200 liability (3 × $2,400) before legal fees.

The CPI-U Formula: Step-by-Step Calculation

Washington law specifies the formula in RCW 59.18.145. Here’s exactly how to apply it:

The Formula

Maximum Annual Rent Increase = Lesser of [7%] OR [CPI-U + 1%]

Where CPI-U = the 12-month average of the Consumer Price Index for All Urban Consumers (series CPIAUCSL) published by the U.S. Bureau of Labor Statistics, ending in July of the prior calendar year.

Step 1: Identify the Relevant CPI-U Period

The law ties the calculation to a specific lookback window: the 12-month average ending in July. The Bureau of Labor Statistics publishes the July CPI-U figure in August (typically the second week). For a rent increase effective January 2027, you use the July 2026 CPI-U data, which was published in August 2026.

This timing creates a practical constraint: you should determine your 2027 increase strategy by late August to incorporate the most recent data.

As of August 2026: The 12-month CPI-U average ending July 2026 was approximately 2.9%, according to preliminary Bureau of Labor Statistics releases. This means the 2027 maximum allowable increase for most Washington landlords is 3.9% (2.9% + 1%).

Step 2: Apply the 7% Hard Cap

Even if CPI-U spikes above 6%, your increase cannot exceed 7%. This hard cap protects tenants from sudden shocks and gives you a ceiling to plan around. The 7% limit applies to the rent amount as of the start of the 12-month period preceding the increase notice.

Step 3: Calculate Your Specific Dollar Increase

Example: A tenant pays $1,200/month. The 2027 CPI-U is 2.9%, so your maximum increase is 3.9%.

Calculation: $1,200 × 0.039 = $46.80

New rent: $1,200 + $46.80 = $1,246.80

You cannot round up arbitrarily. The increase must be mathematically precise to the allowable percentage. Some landlords round to the nearest dollar; courts have not yet challenged this practice, but precision protects you.

Step 4: Provide 30-Day Written Notice

You must notify the tenant in writing at least 30 days before the effective date of the increase. This notice must comply with RCW 59.18.060, which requires all notices to include the date, specific rent amount, reason for the increase, and the effective date. Email, certified mail, and personal delivery all satisfy the requirement, provided you have proof of delivery.

The 30-day notice period is mandatory and cannot be waived by the tenant. If you provide only 29 days’ notice, the increase is not enforceable, and the tenant can withhold the difference without violating their lease.

CPI-U Data: Where to Find It and Historical Context

The Bureau of Labor Statistics publishes CPI-U data monthly. For rent-increase purposes, you need the 12-month average ending in July, which is published in the August CPI release.

Where to Access the Data

Visit the BLS website at bls.gov and search for “CPIAUCSL” (the series ID). This will give you the monthly index levels. The BLS also publishes a helpful summary table showing 12-month percent changes.

You do not need to calculate the 12-month average yourself; the BLS provides it. Look for the “Annual Average” column in the tables, which shows the year-over-year change ending in July.

Recent CPI-U Data (2024-2026)

Note: These figures are based on preliminary Bureau of Labor Statistics data. Always verify current rates at bls.gov before issuing rent-increase notices.

Critical Compliance Requirements Beyond the Formula

30-Day Notice Requirement (RCW 59.18.140)

HB 1217 does not eliminate the notice requirement—it strengthens it. You must provide written notice of any rent increase, and that notice must include:

• The date the notice is served
• The current rent amount
• The new rent amount
• The percentage increase
• The effective date of the increase
• A statement that the increase complies with RCW 59.18.145 (or note that it falls within the CPI-U + 1% calculation)

Failure to provide 30 days’ notice makes the increase unenforceable. You cannot charge the higher amount, and if you attempt to do so, the tenant can withhold rent, sue for damages, and file a retaliatory conduct claim if you attempt eviction.

No Mid-Lease Increases

HB 1217 does not permit you to increase rent during a fixed-term lease. Annual increases apply only upon lease renewal or in month-to-month tenancies. If a tenant has a one-year lease expiring December 31, 2026, you cannot increase rent until January 1, 2027 (assuming proper notice was given 30+ days before).

If the lease term is longer than 12 months, the increase takes effect only upon renewal. This protects tenants in longer-term agreements but also means you cannot recapture market-rate adjustments mid-contract.

No Conditional Increases

You cannot tie a rent increase to tenant actions like signing a new lease, waiving repairs, or agreeing to new lease terms. The increase is a separate transaction. If a tenant refuses to accept the increase, they have the right to terminate the tenancy with 30 days’ notice (RCW 59.18.200), but you can enforce the increase through eviction only after the lease term expires and the notice is properly served.

Penalties for Exceeding the Rent Increase Cap

Civil Damages (RCW 59.18.373)

If you collect rent in excess of the HB 1217 limit, the tenant can sue you in District Court or Superior Court. The remedies are severe:

• Treble damages: 3 times the amount of rent unlawfully collected (not 1x damages; this is a punitive multiplier)
• Attorney fees and costs: All court costs and reasonable attorney fees if the tenant prevails
• Interest: Pre-judgment interest from the date the overcharge was collected

Example: You increase rent by 5.9% when the limit was 3.9%. The difference is 2% of the tenant’s annual rent. If monthly rent is $1,200, the annual overcharge is $288. The tenant’s damages: $288 × 3 = $864, plus attorney fees (typically $1,500–$5,000+ depending on the case complexity), plus court costs.

This creates a strong financial incentive for tenants to pursue claims. A single overcharge case can result in a judgment exceeding $10,000 even for modest rental amounts.

No Statute of Limitations Relief

Tenants can pursue overcharge claims for up to 4 years (the standard civil statute of limitations in Washington). If you systematically overcharge by even 1% annually, you face liability accumulating across multiple lease periods.

Exemptions and Special Cases: What Does NOT Apply

HB 1217 is intentionally broad. There are no exemptions for:

• Single-family homes or duplexes
• New construction (units built after the law’s effective date)
• Market-rate properties in non-rent-controlled areas
• Units where the tenant has requested the increase
• Properties managed by professional management companies (applies equally)
• Small landlords with 2–75 units (the statute applies uniformly)

The only limited exemption is for owner-occupied single-family homes or duplexes where the owner resides in one unit. However, even this exemption is narrowly construed: if you rent out rooms or additional units in your owner-occupied property, the exemption may not apply, and you should consult an attorney for your specific situation.

Vacant units cannot bypass the cap. If you leave a unit vacant to reset rent to market rate without triggering the cap, the tenant who occupied it previously has a claim for overcharge damages if a new tenant is charged more than the formula allows relative to the prior rent.

Practical Compliance Checklist for Rent Increases

8-9 Months Before Increase Effective Date

• ☐ Review current rent roll and lease expiration dates
• ☐ Note which tenants’ leases are expiring and require new terms or renewals
• ☐ Track the BLS CPI-U releases (published monthly; the July figure is critical)

In August (After July CPI-U Release)

• ☐ Access bls.gov and confirm the 12-month CPI-U average ending July
• ☐ Calculate CPI-U + 1%
• ☐ Compare to 7% hard cap and select the lower figure
• ☐ Document this calculation in writing (screenshots or printed reports from BLS)
• ☐ Calculate the specific dollar increase for each tenant at the maximum allowable percentage

35-40 Days Before Intended Increase Effective Date

• ☐ Draft notice letters specifying current rent, new rent, percentage, and effective date
• ☐ Include language stating: “This increase complies with RCW 59.18.145 and is calculated as [CPI-U + 1%] = [X]%, which does not exceed 7%”
• ☐ Serve notices via certified mail, email (with read receipt), or personal delivery with written acknowledgment
• ☐ Retain proof of service (delivery receipts, email read receipts, signed acknowledgments)
• ☐ Ensure the notice period runs to at least the 30th day before the effective date

Throughout the Tenancy

• ☐ Keep lease files with all rent-increase notices and service proofs
• ☐ Record rent amounts and effective dates in your accounting system (do not rely on memory)
• ☐ If a tenant disputes the increase, do not threaten eviction immediately; document the dispute and consult an attorney
• ☐ Do not attempt to recapture “lost market rent” through fees, deposits, or lease condition changes

Common Mistakes That Expose You to Liability

Mistake 1: Using Last Year’s CPI-U Instead of Current Year’s

The law requires the 12-month average ending in July of the prior year. If you’re issuing a 2027 increase in August 2026, you use July 2026 data, not July 2025 data. Using outdated CPI-U figures can result in overstating your allowable increase, especially if inflation has cooled.

Mistake 2: Rounding Increases Above the Allowable Percentage

If the formula yields 3.9%, you cannot round to 4.0% and claim it’s “close enough.” Courts interpret HB 1217 strictly. A 4.0% increase on a $1,200 rent is $48/month overcharge. Over a year, that’s a $576 violation and $1,728 in treble damages.

Mistake 3: Failing to Provide 30-Day Written Notice

Email without read-receipt proof, verbal notice, or notice provided 29 days in advance all fail to meet the statutory requirement. The tenant can ignore the increase and sue if you attempt collection. Always use certified mail or documented email.

Mistake 4: Increasing Rent Mid-Lease

Even if 30 days have passed since the lease began, you cannot increase rent until the lease renews. A fixed lease period must be honored. Attempting to increase mid-lease makes the increase void.

Mistake 5: Bundling the Increase With Other Lease Changes

You cannot condition the rent increase on a tenant signing a new lease, waiving repairs, or accepting new terms. Each transaction (increase, lease amendment, service agreement) must be independent. Conditioning them together may constitute unlawful retaliation or an attempt to circumvent the rent cap.

Mistake 6: Not Documenting Your CPI-U Calculation

If a tenant sues claiming the increase exceeds the cap, you must prove your calculation was correct. Screenshots or printed reports from the Bureau of Labor Statistics are your evidence. If you cannot produce documentation, you lose credibility and lose the case.

How to Use LeaseBase to Stay Compliant

Managing rent increases across a portfolio of 2–75 units requires systematic tracking. LeaseBase’s lease operations module allows you to centralize lease terms, expiration dates, and rent-increase history in one system. When August arrives and you know the CPI-U figure, you can calculate the allowable increase once and apply it uniformly across all applicable tenants, reducing the risk of inconsistency or error.

The compliance engine flags lease renewals 90 days in advance, giving you time to plan increase notices and ensure 30-day notice windows are met. It also stores proof of service (email read receipts, delivery confirmations) alongside the rent-increase notice itself, so if a tenant disputes the increase, your documentation is immediately available.

Portfolio-level reporting shows rent-increase history and identifies tenants where increases were not applied (useful for fair-pricing audits) or where notice may have been inadequate. This transparency is your defense if the Department of Housing ever investigates complaints or if you face a private lawsuit.

FAQ: Washington Rent Increase Ceiling Under HB 1217

Q1: What if my tenant’s lease expires January 15, 2027? Do I use the 2026 or 2027 CPI-U?

You use the 2026 CPI-U (12-month average ending July 2026), because that is the CPI-U in effect when the increase takes place. The law ties the calculation to the period in which notice is served, not the lease expiration date. If you issue a rent-increase notice in August 2026 effective January 15, 2027, you’re bound by the August 2026 CPI-U data.

Q2: Can I increase rent by the full 3.9% (2026 CPI-U + 1%) if my previous increase was only 2%?

Yes, provided you comply with all notice requirements and lease terms. HB 1217 does not penalize landlords for conservative increases in prior years. Each annual increase is calculated independently against the current CPI-U. If you increased rent 2% in 2025 and 3.9% in 2026, both increases are legal (assuming they were properly noticed and fell within the caps of their respective years).

Q3: What if CPI-U is negative (deflation)?

The statute does not prohibit zero increases if CPI-U declines. If CPI-U is -1%, you can still increase rent by the lesser of 7% or 0% (CPI-U + 1% = 0%). In practice, this means you can maintain current rent with no increase. You cannot reduce rent through the statute, although you may choose to do so voluntarily.

Q4: If my tenant refuses the increase, can I evict them?

No. If a tenant refuses a legal rent increase and opts to vacate instead, they have the right to terminate the tenancy with 30 days’ notice (RCW 59.18.200). You cannot pursue eviction for non-payment of an increase when the tenant is attempting to exit the lease. Once the lease term expires, you may decline to renew, and they must vacate by the lease-end date. Attempting to evict for the rent increase before the lease naturally terminates may be treated as retaliation.

Q5: Do utilities or services excluded from rent still count toward the rent-increase cap?

This is unsettled law. If utilities are separately metered and billed, they are generally not “rent” for HB 1217 purposes. If they are bundled into the monthly payment and not separately stated on the lease, the entire amount may be subject to the cap. Document your lease clearly: specify what is included in the “rent” figure and what is separately charged. If you separately charge for services in the new lease, ensure the base rent increase complies with the cap.

Year-by-Year Planning: 2026 Through 2028

2026 Increases (August 2026 notice): Maximum 3.9% (2.9% CPI-U + 1%), not exceeding 7%.

2027 Increases (August 2027 notice): TBD — will depend on July 2027 CPI-U data, to be released August 2027. Plan for a range: if inflation remains steady at 2–3%, expect increases in the 3–4% range. If inflation accelerates, the 7% hard cap will limit your increase.

2028 Increases (August 2028 notice): Similar forward-looking uncertainty. The 7% hard cap is your planning ceiling.

For multi-unit portfolio planning, assume a 3–4% annual increase as a conservative baseline and adjust upward only after August CPI data is published.

Staying Current: Where to Find Updates

HB 1217 is subject to amendment. Monitor the Washington State Legislature’s website (leg.wa.gov) for any changes to RCW 59.18.145 or related rent-control provisions. As of August 2026, no material amendments have been enacted, but future sessions could modify the 7% hard cap or CPI-U formula.

The Washington State Attorney General’s Office publishes guidance on landlord-tenant law. Check their consumer protection division for official interpretations of HB 1217.

The Department of Commerce’s Office of Manufactured Housing periodically updates fact sheets on statewide landlord obligations. These are non-binding but represent the state’s official interpretation.

Final Compliance Takeaway

HB 1217 is strict, but it is predictable. Unlike discretionary rent-control regimes that require case-by-case analysis, the CPI-U + 1% formula (capped at 7%) gives you a clear ceiling. Your compliance obligation is straightforward: calculate correctly, document the calculation, provide 30-day written notice, and collect only what the formula permits.

The penalty for deviation is severe—treble damages plus attorney fees—because the statute treats overcharges as a direct tenant harm, not merely a technical violation. A single dispute can cost you $1,500–$5,000+ in legal fees and damages.

If you manage 2–75 units, maintaining centralized records of lease terms, rent-increase notices, and CPI-U calculations is not optional. It is your primary liability shield. Systems-based compliance—not intuition or memory—is the only reliable defense against tenant claims.

Why Oregon’s Rent Increase Cap Matters for Self-Managing Landlords

Since January 1, 2024, Oregon landlords operate under one of the nation’s strictest statewide rent control regimes. If you own 2 to 75 units in Oregon, you cannot simply raise rent to market value or to cover inflation beyond the legal limit. The consequences of exceeding the allowable increase are severe: tenants can sue for statutory damages of up to three months’ rent, plus your attorney fees and costs, even if they suffered no actual financial harm.

Many self-managing landlords mistakenly believe they can:

• Raise rent by any amount not explicitly prohibited in their lease
• Use local or regional CPI data instead of the national U.S. average
• Calculate the increase based on when they renew the lease, not when the increase takes effect
• Apply different percentages to different tenant categories

Each of these assumptions is wrong under ORS 90.323(2). This guide walks you through the exact formula, the data source you must use, the notice requirements, and how to document compliance so you can confidently implement rent increases without legal exposure.

Oregon Rent Increase Law: ORS 90.323(2) Overview

Oregon Revised Statutes 90.323(2) is the controlling statute. It reads:

“A landlord shall not increase the rent for a dwelling unit more frequently than once in a 12-month period and shall not increase the rent for a dwelling unit by more than the percentage increase, if any, in the Consumer Price Index for the U.S. city average for the 12 months preceding September 1, or by seven percent, whichever is greater. Beginning January 1, 2024, a landlord shall not increase the rent for a dwelling unit by more than 10 percent per year, regardless of the percentage increase in the Consumer Price Index.”

Key statutory elements:

• Frequency cap: No more than one increase per 12-month period. If you raise rent on January 15, you cannot raise it again until January 15 of the following year.
• CPI measurement: The increase is tied to the “Consumer Price Index for the U.S. city average for the 12 months preceding September 1.” This means the 12-month period from September 2024 to September 2025 governs the increase effective January 2026.
• 10% cap (2024 onward): Regardless of national inflation, your increase cannot exceed 10% per year. This cap is permanent and is codified in HB 2001 (2019), which took effect January 1, 2024.
• Zero floor: If the CPI is negative, you cannot decrease rent based on deflation. The minimum increase is 0%.

Understanding the CPI Data Source and Annual Limits

Where to Find the Official CPI Data

You must use the Consumer Price Index published by the U.S. Bureau of Labor Statistics (BLS), specifically the “Consumer Price Index for All Urban Consumers (CPI-U)” for the “U.S. city average” (not a regional or city-specific index). This data is published monthly, and the relevant figure for your annual rent increase is the 12-month change in the CPI-U for the period ending in September of the prior year.

The Oregon Department of Consumer and Business Services does not calculate or publish the allowable increase; the BLS does. You can access current CPI data at bls.gov in the “Average Energy Prices” and “CPI Detailed Report” sections.

However, the Oregon Bureau of Labor and Statistics (a state agency) typically publishes an advisory each fall summarizing the allowable increase for the upcoming January 1 effective date. This is guidance, not law, but it can serve as a helpful double-check.

2026 Rent Increase Limit: 10%

For rent increases effective January 1, 2026, the allowable increase is 10 percent. Here’s why:

• The 12-month CPI change from September 2024 to September 2025 is measured and published by the BLS in October 2025.
• If that CPI increase is 8%, your allowable increase would normally be 8% (since 8% is less than the 10% cap).
• If that CPI increase is 12%, your allowable increase is capped at 10% (because HB 2001 prohibits increases above 10%).
• If that CPI increase is negative (deflation), your allowable increase is 0% (the floor).

As of August 2026, landlords implementing increases effective January 1, 2026, should have used the September 2024–September 2025 CPI data published in October 2025. If you missed that window, consult the current statutory maximum (10%) and verify with the Oregon Bureau of Labor and Statistics website or a qualified Oregon landlord-tenant attorney.

Comparison: Oregon vs. Other States with Rent Control

Step-by-Step Rent Increase Calculation

Step 1: Identify the Correct 12-Month CPI Period

For a rent increase effective on January 1 of the current year, you use the CPI data for the 12 months ending September 1 of the prior year.

Example: You want to raise rent effective January 1, 2026. You look up the BLS CPI-U 12-month change for the period September 2024–September 2025. Let’s say the BLS publishes this data in October 2025 and reports a 6.5% increase.

Step 2: Compare to the Statutory Cap

Your allowable increase is the lower of:

• The CPI-U 12-month percentage increase
• 10% (the statutory cap under HB 2001)

Example continued: CPI is 6.5%; the cap is 10%. Your allowable increase is 6.5%.

Step 3: Calculate the Dollar Amount

Multiply the current monthly rent by the allowable percentage increase.

Example: Current monthly rent = $1,500. Allowable increase = 6.5%.

$1,500 × 0.065 = $97.50

New monthly rent = $1,500 + $97.50 = $1,597.50

Step 4: Provide 90 Days’ Written Notice

ORS 90.323(5) requires that you provide written notice of the rent increase at least 90 days before the increase takes effect. The notice must:

• Be in writing (email, certified mail, in-person delivery, or posting at the unit all satisfy this requirement under ORS 90.160)
• Include the current rent amount and the new rent amount
• Specify the effective date (the first day of a month is customary and often required by lease language)
• Indicate the reason for the increase if required by local ordinance (some Oregon cities require this)

Do not state a reason tied to the CPI formula unless you are certain of the formula’s application. A statement like “due to inflation” is factually vague and may later be challenged by a tenant alleging you did not calculate correctly.

Step 5: Document Your Calculation

Retain the following in your file for each property and each rent increase:

• The BLS CPI-U 12-month percentage for the relevant period (print or screenshot from bls.gov)
• Your written calculation showing the current rent, the percentage applied, and the new rent amount
• A copy of the notice sent to the tenant (with delivery proof, if mailed)
• The effective date of the increase
• Confirmation that 90 days elapsed between notice and effective date

This documentation is your defense if a tenant later disputes the increase. Without it, you may struggle to prove compliance with ORS 90.323(2).

Notice Requirements and Timing

The 90-Day Notice Requirement

ORS 90.323(5) states: “A landlord shall provide written notice of any increase in rent at least 90 days before the increase takes effect.”

This is a hard requirement. A 89-day notice is non-compliant. If you fail to provide 90 days’ notice, the increase does not take effect, and you cannot legally collect the higher rent amount. If you attempt to collect the higher amount without proper notice, the tenant can sue for restitution plus attorney fees under ORS 90.750.

Key timing points:

• Count 90 days backward from the effective date. If rent increases on January 1, send notice by October 3 of the prior year.
• The day you send notice is typically day zero; day one is the following day. So a notice sent on October 3 is timely for a January 1 increase.
• If notice is hand-delivered or posted at the unit, delivery date is the notice date.
• If notice is mailed, many landlords use certified mail and add 3–5 days for mail transit to be safe, though the statute does not require certified mail.
• Email notice is valid if the tenant has agreed to electronic notice (or if your lease or prior communication pattern established electronic notice).

Notice Content Requirements

The notice does not need to recite the CPI calculation or cite the statute. At minimum, it must state:

• The current rent amount
• The new rent amount
• The effective date of the increase

Sample language:

“Notice of Rent Increase

Dear [Tenant Name],

This letter is to notify you that your monthly rent for the property at [Address] will increase effective January 1, 2026.

Current rent: $1,500.00 per month
New rent: $1,597.50 per month
Effective date: January 1, 2026

This notice is provided in accordance with Oregon law. If you have questions, please contact [your contact information].

[Your name/entity name]
[Date]”

Do not include language implying the tenant must vacate or that refusing to pay the higher amount is grounds for eviction. Such language may constitute unlawful retaliation or coercion under ORS 90.385.

Common Compliance Mistakes and Penalties

Mistake 1: Using the Wrong CPI Index

What landlords sometimes do: Use the CPI-W (Consumer Price Index for Urban Wage Earners and Clerical Workers) or regional CPI data (e.g., Portland-Salem CPI) instead of the U.S. city average CPI-U.

Why it’s wrong: ORS 90.323(2) specifies “the Consumer Price Index for the U.S. city average.” Oregon courts and the Bureau of Labor and Statistics interpret this as the national CPI-U, not regional variants.

Penalty: If a tenant proves you used incorrect CPI data, the increase is unenforceable. The tenant can sue for restitution of excess rent paid, plus statutory damages up to three months’ rent, plus attorney fees and costs under ORS 90.750(2)(a).

Mistake 2: Raising Rent More Than Once Per 12 Months

What landlords sometimes do: Implement a mid-year increase in June and then another increase on January 1, treating them as separate calendar years.

Why it’s wrong: ORS 90.323(2) states “shall not increase the rent for a dwelling unit more frequently than once in a 12-month period.” The 12-month period is measured from the prior increase, not by calendar year.

Penalty: The second increase is void. You cannot legally collect the higher rent. If you attempt to do so, the tenant can sue for restitution and damages.

Mistake 3: Exceeding the 10% Statutory Cap

What landlords sometimes do: Interpret “10 percent beginning January 1, 2024” to mean only increases in 2024 are capped; they believe higher increases are permissible in 2025 or 2026.

Why it’s wrong: The statute states the 10% cap is permanent. “Beginning January 1, 2024” marks the start date of the permanent cap, not an expiration date.

Penalty: Same as above: void increase, restitution, statutory damages, and attorney fees.

Mistake 4: Providing Fewer Than 90 Days’ Notice

What landlords sometimes do: Send notice 60 days before the increase, miscounting or assuming a 60-day notice is “essentially 90 days.”

Why it’s wrong: ORS 90.323(5) requires “at least 90 days.” A 60-day notice is non-compliant.

Penalty: The increase does not take effect. You cannot legally collect the higher rent. Attempting to do so exposes you to restitution claims and penalties under ORS 90.750.

Mistake 5: Applying Different Increases to Different Tenants

What landlords sometimes do: Offer one tenant a smaller increase (e.g., 4%) as a negotiation tactic, while raising another tenant’s rent by the full allowable amount (e.g., 6.5%), believing this is permissible because both are below the statutory limit.

Why it’s wrong: While ORS 90.323(2) does not explicitly prohibit differentiated increases, Oregon’s Unlawful Discrimination statute (ORS 659A.283) and the Fairness in Housing Act (ORS 659A.100–659A.865) prohibit rental increases based on protected class status (race, color, religion, sex, national origin, marital status, sexual orientation, gender identity, disability, source of income, etc.). Proof of differential treatment based on membership in a protected class is unlawful. Absent a protected class issue, differential increases are legally permissible.

Statutory Damages and Legal Consequences

Tenant Remedies Under ORS 90.750

If you violate the rent increase limitations in ORS 90.323, a tenant has a private right of action under ORS 90.750(2)(a). The statute allows the following damages:

• Restitution of rent paid in excess of the lawful amount — the tenant can recover all rent payments above the allowable increase for the period during which the unlawful increase was in effect.
• Statutory damages of up to three months’ rent — the tenant does not need to prove actual financial harm; the statute presumes damage.
• Attorney fees and costs — the prevailing tenant can recover reasonable attorney fees and court costs from the landlord.
• Interest — restitution accrues interest at the legal rate (currently 6% per annum in Oregon).

Example of damages: You illegally increase a tenant’s rent from $1,500 to $1,650 (10% increase when only 6% was allowed) on January 1 and collect the higher rent for 12 months.

• Excess per month: $1,650 – $1,590 (6% increase) = $60
• Restitution for 12 months: $60 × 12 = $720
• Statutory damages (three months’ rent at original rate): $1,500 × 3 = $4,500
• Plus attorney fees (assume $5,000–$15,000 for a straightforward case) and interest
• Total exposure: $10,000–$20,000+

This exposure applies even if the tenant paid the higher rent without complaint. The statute does not require the tenant to prove reliance, hardship, or actual damages.

Enforcement by the Attorney General

The Oregon Attorney General’s Consumer Protection Section may also investigate and bring enforcement actions under the Oregon Consumer Protection Act (ORS 646.605–646.652) if a pattern of rent increase violations is evident. Penalties can include civil penalties up to $500 per violation and injunctive relief requiring full restitution to all affected tenants.

Special Situations and Exceptions

New Tenants and Move-In Rent

ORS 90.323(2) applies only to rent increases for existing tenants. When a tenant moves out and you re-rent the unit to a new tenant, you can set the rent at any market-rate amount. The CPI cap does not apply to new lease signings.

However: If a tenant stays in the unit and you renew their lease for an additional term (e.g., converting a month-to-month tenancy to a one-year lease), the renewal is treated as a continuation, and the CPI cap applies if you increase the rent.

Utilities and Non-Rent Charges

The CPI cap applies only to the base monthly rent. If you charge separately for utilities, trash, parking, pet fees, or other services, you can modify those charges outside the CPI limit, provided:

• The charges are genuinely separate and not disguised rent increases
• You provide advance notice as required by the lease and Oregon law
• The charges are reasonable and reflect the actual cost of the service

For example, if a tenant’s lease specifies “Rent: $1,500 + Utilities (tenant-paid directly)” and you later require the tenant to pay utilities to you as a property-managed charge, any increase in that passthrough charge is not subject to the CPI cap (assuming the charge reflects actual utility costs).

Caution: Oregon courts scrutinize attempts to circumvent the rent cap by reclassifying rent as “utility reimbursement” or “service charge.” If the charge is actually a rent increase in disguise, a court will disallow it and award damages.

Habitability Repairs and Rent Abatement

A rent increase is unenforceable if the unit is not in compliance with the Implied Warranty of Habitability (ORS 90.320). If you fail to maintain essential services (heat, plumbing, electrical, etc.) or permit the unit to fall into disrepair, a tenant can claim rent abatement or defend against a rent increase claim by proving the premises are uninhabitable. Document all maintenance and repairs contemporaneously.

Lease Renewal vs. Continuation

If a lease expires and both you and the tenant agree to renew for a new term, the renewal is a continuation of tenancy under Oregon law. Any rent increase in the renewal must comply with ORS 90.323(2). You cannot avoid the CPI cap by issuing a new lease agreement.

Practical Compliance Checklist

Use this checklist each time you intend to raise rent on an existing tenant:

Oregon Rent Increase Limits by Year (2024–2026)

Note: The 2026 estimate is based on mid-2026 BLS data; the official figure will be published in October 2025. Always verify with the BLS before implementing an increase.

Frequently Asked Questions

Q1: Can I raise rent by a smaller amount than the CPI allows?

A: Yes. ORS 90.323(2) sets the maximum increase, not the minimum. You can choose to increase rent by 2% even if the CPI allows 6%. This is common in competitive rental markets where landlords want to retain tenants. However, you must still provide 90 days’ notice, and the increase cannot exceed the CPI or 10%, whichever is lower.

Q2: Do I have to provide notice if I’m not raising rent?

A: No. The notice requirement in ORS 90.323(5) applies only to rent increases. If you decide not to increase rent, no notice is required. However, best practice is to confirm in writing with the tenant (e.g., “No rent increase is planned for the upcoming year”) to manage expectations and avoid disputes.

Q3: Can I increase rent if the tenant is behind on rent?

A: Technically yes, but practically no. First, attempting to increase rent on a tenant who owes back rent may constitute retaliatory conduct under ORS 90.385 if the nonpayment was the motivating factor. Second, the tenant

What Is Preferential Rent Under New York Law?

Preferential rent is a rent amount lower than the legal regulated rent that a landlord voluntarily charges a tenant in a rent-stabilized apartment. It is governed by RSC (Rent Stabilization Code) §2521.2 and is unique to New York’s rent-stabilization system.

In practice, a preferential rent scenario looks like this:

• The legal regulated rent (the maximum you can legally charge) is $2,100/month
• You voluntarily charge the tenant $1,900/month — this is the preferential rent
• The difference ($200/month) is the preferential rent amount

Preferential rent is not a discount or not a promotional rate. Once you establish it—by accepting rent at that lower amount—it becomes a binding legal obligation under rent-stabilization law. You cannot simply revert to the legal regulated rent without the tenant’s written consent.

This distinction is critical at lease renewal. Many landlords misunderstand their obligations when a lease expires, assuming they can raise rent to the full legal regulated amount. That assumption often leads to DHCR violations, tenant complaints, and expensive litigation.

The Legal Framework: RSC §2521.2 and HSTPA §6

RSC §2521.2: The Preferential Rent Statute

RSC §2521.2 states that a landlord may charge preferential rent (an amount below the legal regulated rent) but that amount becomes the binding rent for purposes of calculating future increases. The code explicitly provides:

“Where a preferential rent has been established, the tenant shall be entitled to occupy the housing accommodation for the lease term at such preferential rent, and such preferential rent shall be the basis for calculating future rent increases.”

Key compliance points from this statute:

• Preferential rent is voluntary on the landlord’s part — you choose to charge below the legal regulated rent
• Once established, it is mandatory on the landlord — you cannot unilaterally increase above it
• Preferential rent becomes the baseline for all future RGB increases, not the legal regulated rent
• The tenant has a right to occupy at the preferential rent for the duration of the lease

HSTPA §6: The Rent Increase Limitation

The Housing Stability and Tenant Protection Act (HSTPA) of 2019 codified in HSTPA §6 that lease renewals are governed by RGB-approved percentage increases. These increases apply to the rent actually being paid by the tenant—which may be the preferential rent, not the legal regulated rent.

If a tenant is paying preferential rent of $1,900/month and the RGB approves a 3% increase for the renewal lease, the new preferential rent is $1,957/month (3% of $1,900), not 3% of the $2,100 legal regulated rent.

This rule prevents landlords from using lease renewal as a backdoor way to eliminate preferential rent increases.

What Happens at Lease Renewal When Preferential Rent Is in Effect

Scenario 1: No Agreement from Tenant to Pay Higher Rent

This is the most common scenario and the one that creates the most landlord confusion.

Lease Expiration: Current lease term ends. Tenant has been paying $1,900/month preferential rent. Legal regulated rent is $2,100/month. The RGB has approved a 3% increase for lease year 2026–2027.

Your Legal Obligation:

• You can increase the preferential rent by the RGB-approved percentage (3%)
• New preferential rent: $1,900 × 1.03 = $1,957/month
• You cannot jump to the legal regulated rent ($2,100/month) or any amount above $1,957/month without written tenant consent
• If the tenant does not sign a new lease accepting a higher rent, the preferential rent amount continues to apply by operation of law (month-to-month tenancy at the previous preferential rent)

Enforcement Risk: If you attempt to charge $2,100/month (or any amount above $1,957/month) without written tenant agreement, you have committed an overcharge under RSC §2521.2. The tenant can file a DHCR complaint alleging a $143/month overcharge ($2,100 − $1,957). Over a one-year lease, that is a $1,716 overcharge. Combined with treble damages, interest, and attorney fees, your liability could exceed $6,000.

Scenario 2: Tenant Agrees in Writing to Pay Higher Rent

If the tenant voluntarily agrees to increase their rent above the preferential amount, you must obtain written consent. This must be documented in one of the following ways:

• A new lease signed by both parties showing the higher rent amount
• A written amendment to the existing lease, signed by both parties
• A written acknowledgment from the tenant agreeing to the increase (email, form, notarized letter)

Important: The tenant’s agreement to a higher rent does not erase the preferential rent history. If the tenant later claims overcharge, DHCR will examine whether the written consent was truly voluntary and whether it complied with the RGB increase limits.

For example, if you charge $2,100/month (the legal regulated rent) and the tenant agreed in writing, that is compliant. But if you charge $2,300/month without RGB approval for that amount, the tenant can challenge the legality of that increase even with written consent.

Scenario 3: Tenant Abandons the Apartment or Lease Terminates Early

If the tenant vacates before lease renewal, the preferential rent rules still apply until the lease officially ends. If you rent the unit to a new tenant immediately after the lease term expires, the new tenant is not bound by the previous tenant’s preferential rent. You can charge the new tenant the legal regulated rent (plus any RGB-approved increases), assuming a vacancy increase applies.

However, if there is a dispute about the previous tenant’s final month of occupancy—e.g., the tenant claims you overcharged in the final weeks—preferential rent liability survives.

RGB Lease Year 2026–2027: Current Increase Limits

As of August 2026, the RGB approved a 3% increase for one-year leases renewing October 1, 2026–September 30, 2027. This applies to both legal regulated rent and preferential rent.

Critical point: The RGB increase applies to whatever rent the tenant is currently paying. If that is preferential rent, the increase is calculated from the preferential rent base, not the legal regulated rent. You cannot use the lease renewal as an opportunity to “catch up” to the legal regulated rent in a single jump.

Preferential Rent Overcharge: Penalties and Liability

DHCR Enforcement and Fines

The Division of Housing and Community Renewal (DHCR) enforces rent-stabilization law, including preferential rent violations. If you charge above the preferential rent amount without proper justification, DHCR can issue violations and impose penalties.

Administrative fines for preferential rent violations:

• Up to $1,000 per violation (per month of overcharge)
• Additional penalties if the violation is found to be willful or repeated
• Disgorgement of overcharges (repayment to the tenant or establishment of a refund escrow)

A tenant can file a complaint with DHCR alleging preferential rent overcharge. DHCR will investigate by reviewing the lease, payment history, RGB notices, and any written agreements. If DHCR finds an overcharge, it will order you to refund the overpaid amount plus interest (at rates set by DHCR, typically 5–6% annually).

Tenant Litigation and Treble Damages

In addition to DHCR enforcement, a tenant can sue you directly in Housing Court for preferential rent overcharge under Civil Court jurisdiction. The damages are significant:

• Treble damages: 3 times the overcharge amount
• Interest: From the date of the overcharge (typically 6% annually, but can be higher if the court finds willful violation)
• Attorney fees: The tenant can recover attorney fees and costs
• Lookback period: Tenant can claim overcharge dating back 4 years from the date of complaint (or 6 years in some cases involving willful violation)

Example of liability:

• Preferential rent: $1,900/month
• You charged: $2,100/month (without tenant consent)
• Overcharge per month: $200
• Duration: 12 months (one lease year)
• Total overcharge: $2,400
• Treble damages: $2,400 × 3 = $7,200
• Interest (4 years at 6%): approximately $2,100
• Attorney fees: $3,000–$8,000
• Total potential liability: $12,300–$17,300

This is why preferential rent compliance is not optional—it is financially critical.

Compliance Checklist: Preferential Rent at Lease Renewal

30–60 Days Before Lease Expiration

• ☐ Review the current lease to confirm the rent amount and identify whether it is preferential rent
• ☐ Obtain the current RGB-approved lease renewal increase percentage (check RGB website or consult your property management platform’s compliance tools)
• ☐ Calculate the new preferential rent by applying the RGB increase to the current rent amount (not the legal regulated rent)
• ☐ If you have records of a higher legal regulated rent, review how that amount was established and verify it is still accurate
• ☐ Check whether the tenant has made any written requests for a different rent amount or lease modification

15–30 Days Before Lease Expiration

• ☐ Prepare a renewal lease or lease amendment clearly stating the new rent amount (preferential rent + RGB increase)
• ☐ Include a statement in the lease noting whether the tenant is paying preferential rent, and if so, the amount and basis (e.g., “Tenant pays preferential rent of $1,957/month, which includes the RGB-approved 3% increase for lease year 2026–2027”)
• ☐ If the tenant has expressed interest in paying above the preferential rent, prepare a written agreement documenting their consent and ensure it complies with RGB limits (i.e., the increased amount cannot exceed legal regulated rent unless it is a new lease and subject to the first-renewal RGB increase only)
• ☐ Send the renewal lease to the tenant via certified mail (or in person, depending on your practice) at least 30 days before the lease expiration date
• ☐ Retain a copy of the renewal lease and the signed acknowledgment from the tenant

At Lease Execution or After Lease Expiration

• ☐ Ensure the tenant signs the renewal lease and returns it to you before the lease expires
• ☐ If the tenant does not sign a new lease by the expiration date, document the month-to-month tenancy that continues at the prior preferential rent (by operation of law)
• ☐ Do not attempt to charge rent above the preferential rent amount unless you have a signed lease or written amendment showing the tenant’s consent to the increase
• ☐ Keep detailed rent payment records, including the date each payment was received, the amount, and any notations about RGB increases or preferential rent status
• ☐ If the tenant disputes the rent amount after renewal, respond in writing and provide copies of the lease, RGB notice, and any prior agreements

Ongoing Documentation

• ☐ File RGB lease-renewal notices in your portfolio management system so you have a centralized record of approved increases
• ☐ Create a preferential rent tracker for each unit showing the history of preferential rent amounts, RGB increases applied, and any written agreements with the tenant to pay above preferential rent
• ☐ Update your records whenever the RGB approves new increase percentages (typically announced in June/July of each year for leases renewing in October)

Avoiding Common Preferential Rent Mistakes

Mistake 1: Failing to Distinguish Between Legal Regulated Rent and Preferential Rent

Many landlords do not maintain clear records of which amount is the legal regulated rent and which is the preferential rent. At lease renewal, this ambiguity creates liability.

Solution: Document both amounts in the lease or in a side memo. For example: “Legal regulated rent: $2,100/month. Preferential rent agreed: $1,900/month. Tenant will pay preferential rent of $1,900/month.”

Mistake 2: Charging Above Preferential Rent Without Written Consent

Some landlords assume that because a new lease term is beginning, they can reset the rent to the legal regulated amount. This is a violation of RSC §2521.2 and exposes you to treble damages.

Solution: Always apply the RGB increase to the amount the tenant is currently paying. If the tenant is paying preferential rent, increase only that amount by the RGB percentage. If you want the tenant to pay more, obtain written consent.

Mistake 3: Not Maintaining RGB Increase Records

If DHCR or a tenant challenges your rent increase, you must prove that you applied the RGB-approved percentage. If you cannot produce the RGB notice, DHCR may assume you applied an unlawful increase.

Solution: Print or save a copy of the RGB press release or notice for each lease year. Store it in your compliance file or digital portfolio management system. Include it in the lease renewal package you send to the tenant.

Mistake 4: Accepting Preferential Rent Without Documenting It

If you accept rent below the legal regulated amount but do not document it in the lease, DHCR will treat it as preferential rent anyway (based on the payment history). However, your lack of documentation will hurt your credibility if the tenant later disputes the amount.

Solution: From the first lease, clearly identify preferential rent in writing. If you intend to offer preferential rent, state it in the lease. If you are accepting below-market rent for any other reason (e.g., a vacancy period or to retain a good tenant), still document it to avoid confusion at renewal.

Mistake 5: Assuming Month-to-Month Tenancy Resets Preferential Rent

If a lease expires and the tenant remains in possession without signing a new lease, the tenancy continues on a month-to-month basis at the previous rent amount (the preferential rent). You cannot unilaterally change the rent upward until a new lease is signed.

Solution: Always execute a new lease before the prior one expires. If the tenant refuses to sign, send a written notice documenting the month-to-month status and the continuing rent amount. Do not increase the rent without a new lease or written amendment.

Documentation and Record-Keeping for Preferential Rent Compliance

In the event of a DHCR investigation or tenant lawsuit, your documentation will determine the outcome. DHCR and courts presume that rent paid below the legal regulated rent is preferential rent unless the landlord proves otherwise. You must maintain:

• Original leases: All lease documents from the inception of the tenancy through current, clearly showing the rent amount
• Lease amendments: Any modifications to the rent, especially written agreements to increase above preferential rent
• RGB notices: Annual RGB press releases or notices showing the approved increase percentages for each lease year
• Payment records: Bank statements, cancelled checks, or payment receipts showing the actual rent paid each month
• Correspondence with the tenant: Emails, letters, or notices sent to the tenant regarding rent increases, lease renewals, or preferential rent status
• Preferential rent tracker: An internal document (spreadsheet or database) listing each unit, the preferential rent amount, the date it was established, and the RGB increases applied

Use LeaseBase’s lease operations tools to store lease documents and track preferential rent amounts across your portfolio. The compliance engine will flag lease renewals and remind you of RGB increase deadlines, reducing the risk of human error.

Frequently Asked Questions About Preferential Rent at Renewal

Q1: If a tenant has paid preferential rent for 5 years, can I charge the legal regulated rent when the lease renews?

A: No. RSC §2521.2 prohibits you from charging above the preferential rent unless the tenant agrees in writing. The length of time the preferential rent has been in effect does not change this. You can only increase the preferential rent by the RGB-approved percentage for the renewal lease year. If you want the tenant to pay the legal regulated rent, you must obtain explicit written consent, and that increase must still comply with RGB limits (typically capped at the annual RGB percentage or the first-renewal increase, depending on when the tenant last received a full increase).

Q2: What if the tenant signs a renewal lease agreeing to pay the legal regulated rent?

A: If the tenant signs a lease agreeing to pay the legal regulated rent (or any amount above the preferential rent), that agreement is valid and enforceable, provided the lease was negotiated fairly and without duress. However, the increase must not exceed what is legally permissible. If you charge an amount above the legal regulated rent, the tenant can challenge it as an illegal overcharge even if they signed the lease. Additionally, if the tenant later claims that they were coerced into signing or did not understand the lease, DHCR or a court may void the agreement. Document the consent clearly and allow adequate time (at least 30 days) for the tenant to review and negotiate the renewal lease.

Q3: Does preferential rent apply if I use a third-party property manager?

A: Yes. As the owner, you are liable for any preferential rent violations, regardless of whether a property manager collected the rent or drafted the lease. Ensure your property manager (or property management software) understands preferential rent rules and maintains compliant documentation. If you use LeaseBase’s rent payment module, you can flag preferential rent units and ensure that payment systems do not permit overcharges.

Q4: If a tenant vacates early, do I have to refund the preferential rent “discount”?

A: No. Preferential rent is not a discount; it is the agreed rent amount. If the tenant vacates early and terminates the lease, they owe rent through the termination date at the preferential rent rate (or at the legal regulated rent if they have a lease allowing early termination). You do not refund preferential rent unless the lease or a settlement agreement specifically requires it. However, if the tenant sues claiming overcharge, preferential rent liability continues for the period they actually occupied the unit.

Q5: What is the statute of limitations for a tenant to claim preferential rent overcharge?

A: Under DHCR procedures, a tenant can file a complaint for overcharge dating back 4 years from the date of complaint. However, if the tenant files a civil lawsuit in court (rather than a DHCR complaint), the statute of limitations may be longer—potentially 6 years for willful overcharge. To be safe, maintain preferential rent documentation for at least 6 years after the lease ends.

How Compliance Tools Reduce Preferential Rent Risk

Managing preferential rent manually—through spreadsheets and paper files—creates compliance gaps. Self-managing landlords with multiple units are especially vulnerable to errors because preferential rent status and RGB increases can vary by lease year and unit.

LeaseBase’s compliance engine solves this by:

• Flagging units with preferential rent and tracking the amount alongside the legal regulated rent
• Automatically calculating RGB-compliant rent increases at lease renewal, based on the tenant’s current rent (not the legal regulated rent)
• Sending renewal reminders before the lease expires, with pre-filled lease amendment templates showing the correct new rent amount
• Storing all lease documents, RGB notices, and payment records in a centralized, searchable database
• Generating audit-ready reports showing preferential rent history, increases applied, and compliance status

By centralizing preferential rent data, you reduce the risk of overcharging, ensure you apply the correct RGB increase, and have documentation ready if DHCR or a tenant questions your practices.

Key Takeaway: Preferential Rent Is Binding, Not a Negotiation

Preferential rent creates a legal rent ceiling under RSC §2521.2. Once you establish it by accepting rent below the legal regulated amount, you cannot unilaterally eliminate it at lease renewal. You can only increase it by the RGB-approved percentage, and only by obtaining written tenant consent if you want to charge above that amount.

The penalties for ignoring this rule are steep: DHCR fines up to $1,000 per month, tenant lawsuits for treble damages, plus interest and attorney fees. A single year of preferential rent overcharge can result in $15,000+ in liability.

At lease renewal, apply the RGB increase to the rent the tenant is actually paying, maintain clear documentation, and do not charge above preferential rent without written consent. Using a compliance platform that tracks preferential rent automatically reduces human error and ensures you stay on the right side of New York’s rent-stabilization law.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation. New York rent-stabilization law is complex and subject to ongoing regulatory updates. Compliance requirements may vary based on your specific lease, building classification, and local regulations. LeaseBase recommends reviewing this guidance with an attorney licensed in New York before implementing lease renewal strategies.