Oregon's 90-Day Rent Increase Notice Requirement — Compliance Guide (2026)

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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