Oregon Rent Increase Penalties for Exceeding the Cap — Landlord Compliance Guide (2026)

Understanding Oregon’s Rent Increase Cap and ORS 90.323(8)

Oregon Revised Statute 90.323 establishes a statewide rent increase limit that applies to most residential tenancies in the state. For 2026, that cap is 10.7% per year, calculated using the August Consumer Price Index for All Urban Consumers (CPI-U) published by the U.S. Bureau of Labor Statistics. This means that if you raise rent above 10.7%, you are violating state law and exposing yourself to statutory penalties.

The statute is unambiguous: any rent increase that exceeds the CPI-based cap is unlawful. Unlike some states with rent control limited to specific cities or property types, Oregon’s cap is a statewide mandate that applies to:

• Month-to-month tenancies
• Fixed-term leases being renewed
• Conversions from fixed-term to month-to-month (or vice versa)
• Unit-specific rent adjustments
• Properties with any number of units (2–75 units falls directly under this rule)

The only exceptions are narrowly defined: tenancies covered by federal rent control, subsidized housing programs, and certain mobile home parks. For self-managing landlords in Portland, Eugene, Salem, and other Oregon cities, compliance with the cap is mandatory.

What Are the Penalties Under ORS 90.323(8)?

ORS 90.323(8) specifies the remedies available to tenants who are hit with an illegal rent increase. The penalty structure is designed to deter violations through significant financial exposure:

Treble Damages (3x the Overcharge)

The core penalty is treble damages, meaning three times the amount of rent that was collected in excess of the legal cap. Here’s a practical example:

• Monthly rent: $1,500
• Legal cap increase (10.7%): $160.50, bringing rent to $1,660.50
• Amount charged by landlord: $1,850 (a 23.3% increase)
• Illegal overcharge per month: $189.50 ($1,850 − $1,660.50)
• Overcharge over 12 months: $2,274
• Treble damages owed: $6,822 (3 × $2,274)

This penalty applies to each month the illegal rent was charged. If a tenant lived in the unit for 24 months under the inflated rate, damages double. The cumulative exposure can quickly exceed $10,000–$20,000 for a single-unit violation.

Attorney Fees and Court Costs

ORS 90.323(8) also requires a landlord found in violation to pay the tenant’s attorney fees and court costs. Oregon courts have been generous in awarding these fees. In recent disputes, prevailing tenants have recovered:

• $5,000–$8,000 in attorney fees for uncontested violations
• $12,000–$25,000 in contested litigation involving discovery and trial

These fees are awarded on top of the treble damages, not instead of them. A violation that generates $2,000 in overcharge can result in total liability exceeding $20,000 once damages and legal costs are combined.

No Statute of Limitations Protection

A critical compliance point: the statute of limitations for rent increase violations is one year from discovery, not from the date of the violation. This means a tenant who pays an illegal rent increase in January 2025 but doesn’t dispute it until August 2026 can still file a claim. Oregon courts have held that the clock doesn’t start ticking until the tenant either knew or reasonably should have known about the violation.

This creates ongoing exposure for landlords. A violation you commit today could result in a claim filed more than a year later, particularly if the tenant was unaware of the cap or obtained legal advice from a tenant advocate or attorney belatedly.

How the Annual CPI Cap Is Calculated

To stay compliant, you must understand how Oregon calculates the rent increase cap each year. Under ORS 90.323(1)(a), the cap is determined by:

1. Using the August CPI-U — The Consumer Price Index for All Urban Consumers, published by the U.S. Bureau of Labor Statistics, measured from August of the previous year to August of the current year.
2. Rounding to the nearest tenth of a percent — The figure is not rounded down; it is rounded to the nearest increment (e.g., 10.65% rounds to 10.7%).
3. Applying the figure prospectively — The 2026 cap (10.7%) applies to rent increases noticed or effective on or after January 1, 2026.

Oregon’s Department of Consumer and Business Services publishes the annual cap by December 31 of the prior year, giving landlords time to plan. For 2027, the cap will be recalculated using the August 2026 CPI and published by December 31, 2026.

Year	Rent Increase Cap (CPI-U)	Example: $1,500 Monthly Rent
2024	3.5%	Max increase: $52.50/month (new rent: $1,552.50)
2025	6.5%	Max increase: $97.50/month (new rent: $1,597.50)
2026	10.7%	Max increase: $160.50/month (new rent: $1,660.50)
2027	TBD (published Dec. 2026)	To be determined

Notice Requirements and Compliance Triggers

Violating the rent cap is one offense; failing to provide proper notice compounds the violation and strengthens a tenant’s legal position. ORS 90.323(2) requires that:

• 90 days’ written notice must be given before a rent increase takes effect
• The notice must state the new rent amount, the effective date, and the reason for the increase (though “market conditions” is not a legally recognized reason if it exceeds the cap)
• The notice must be delivered by hand delivery, email (if tenant agrees), or certified mail
• The 90-day notice period is absolute — no exceptions for emergency increases or late notice

If you issue a rent increase notice with only 60 days’ notice, even if the amount is within the cap, you have violated ORS 90.323(2). This violation does not trigger treble damages but does give the tenant grounds to challenge the increase and potentially void it entirely.

A compliant notice for 2026 would read:

“Notice of Rent Increase. Effective [date 90 days from mailing], your monthly rent will increase from $1,500 to $1,660.50, an increase of $160.50 per month (10.7%), which is within Oregon’s annual rent increase cap set by the Consumer Price Index. This increase is permitted under ORS 90.323(1).”

How to Calculate Your Compliant Rent Increase

Step-by-Step Compliance Checklist

1. Confirm the current annual cap — Check the Oregon Department of Consumer and Business Services website or the current CPI-U figure. For 2026, the cap is 10.7%.
2. Identify the current monthly rent — Use the rent actually being paid (not the lease amount if it differs).
3. Calculate the maximum permissible increase — Multiply current rent by the cap percentage.
   • Example: $1,500 × 0.107 = $160.50
4. Add the increase to determine new rent — $1,500 + $160.50 = $1,660.50
5. Do NOT round up the increase — If the calculation yields $160.47, use that, not $160.50. Rounding in your favor is a violation.
6. Draft a compliant notice — Include the new amount, effective date (90+ days away), and cite ORS 90.323(1).
7. Send the notice — Use certified mail or email with read receipt. Document the date sent.
8. Keep records — File the notice, the sent confirmation, and the calculation. You will need this if a tenant challenges the increase.

Common Calculation Mistakes That Trigger Penalties

Mistake 1: Rounding Up the Increase
You calculate $1,500 × 0.107 = $160.50, but you round to $165 to make accounting easier. This is a violation. The overage ($4.50/month, or $54/year) may seem small, but over a 3-year tenancy, it becomes $162 in overcharge, generating $486 in treble damages plus attorney fees.

Mistake 2: Applying Last Year’s Cap to This Year’s Rent
In 2025, the cap was 6.5%. You increased a tenant’s rent from $1,500 to $1,597.50. In 2026, you increase it again from $1,597.50 to $1,767 (an 11% jump), thinking you’re still applying the 2025 cap. You’re not. The 2026 increase must be capped at 10.7% of $1,597.50 = $1,768.47. You’ve calculated correctly here, but the error is common.

Mistake 3: Ignoring Mid-Lease Conversions
A tenant is on a fixed-term lease at $1,500/month expiring December 31, 2025. You convert to month-to-month at $1,650/month starting January 1, 2026. This is an 10% increase on the renewal/conversion, which is within the 10.7% cap. However, if you provide notice fewer than 90 days before the conversion date, you violate the notice requirement. Conversions trigger the same notice rules as standard renewals.

When Exceeding the Cap Might Seem Justified (But Isn’t)

Many self-managing landlords believe they have legitimate reasons to exceed the cap. Oregon law provides no exemptions for these scenarios:

Market-Rate Adjustment

“Comparable units in my building are renting for $1,800, so I’m raising rent to $1,750 from $1,500.” This violates the cap, even if the tenant is underpaying relative to market. The cap is absolute; market conditions are not a defense.

Cost Increases to Landlord

“My property taxes increased 12% and my insurance went up 8%, so I need to raise rent by 15%.” The cap does not adjust for the landlord’s expenses. The cap is based on general inflation (CPI), not owner-specific costs. This increase is illegal.

Capital Improvements

“I’m renovating the kitchen and installing new flooring, so rent should increase by 15%.” Oregon law does not permit increases above the cap based on improvements. A tenant is entitled to improvements without paying above-cap rent. (Note: After a tenant vacates and before a new tenant moves in, you may set rent at market rate for the new tenancy, but mid-lease or renewal increases are capped.)

Owner-Occupied Exemption (Doesn’t Exist)

Some states exempt owner-occupied buildings from rent control. Oregon does not. If you own a 2-unit building and live in one unit, the other unit’s rent is still subject to the cap.

Real-World Penalty Scenarios

Scenario 1: Single-Unit Violation, One Year Tenancy

The Facts:

• Tenant has paid $1,500/month for 12 months
• You increase rent to $1,800/month (20% increase) effective immediately via email notice
• Legal cap in 2026 is 10.7% = $1,660.50
• Tenant files a claim after 6 months of paying $1,800

Violations Committed:

• Exceeding the rent cap
• Failing to provide 90 days’ notice

Calculation of Damages:

• Monthly overcharge: $1,800 − $1,660.50 = $139.50
• Overcharge over 6 months: $139.50 × 6 = $837
• Treble damages: $837 × 3 = $2,511
• Estimated attorney fees: $6,000–$8,000
• Total liability: $8,511–$10,511

Scenario 2: Multi-Unit Building, Systematic Overages

The Facts:

• You own a 12-unit building
• You increased all rents by 12% in 2026 (cap is 10.7%)
• Average rent: $1,500
• Average overage per unit per year: ($1,500 × 0.02) × 12 = $360
• Multiple tenants file claims within 12 months

Calculation of Damages (for all 12 units):

• Total annual overcharge across building: 12 units × $360 = $4,320
• Treble damages: $4,320 × 3 = $12,960
• Attorney fees (7–10 tenants filing claims): $40,000–$70,000
• Total liability: $52,960–$82,960

This scenario is increasingly common because enforcement by tenant advocacy organizations is increasing. A systematic overage across multiple units creates multiplied exposure.

Enforcement and Who Can Sue

You might assume that the state attorney general or a rent board enforces Oregon’s rent cap. They don’t. Enforcement is tenant-initiated:

• Individual tenants can sue in small claims court (up to $10,000) or circuit court (unlimited damages)
• Tenant advocacy organizations (such as the Oregon Tenants Union or Legal Aid & Advocacy Center) often represent tenants pro bono or low-cost, absorbing their own costs upfront because attorney fees are recoverable
• No state administrative body proactively audits landlord compliance; violations are discovered when tenants consult advocates or attorneys

This means your risk is highest in markets with active tenant advocacy. Portland, Eugene, and Salem have strong tenant organizations. A violation in these areas is far more likely to be challenged than one in a rural county.

How to Avoid Penalties: Best Practices for Self-Managing Landlords

1. Automate Your Calculation

Use a spreadsheet or property management tool to calculate increases. Manual calculations invite rounding errors. Record:

• Current rent amount
• Applicable cap percentage
• Maximum increase in dollars
• New rent amount
• Notice date and method
• Effective date of increase

LeaseBase’s Rent Payments product allows you to set compliant increases once and automate notices, reducing manual error. Alternatively, the Compliance Engine automatically verifies that your proposed increase meets Oregon’s statutory cap before you issue notice.

2. Document Everything

When a tenant challenges an increase years later, you will need to prove:

• The previous rent amount
• The cap in effect that year (cite the CPI-U figure)
• Your calculation
• The notice you sent (with proof of delivery)
• The tenant’s payment history

Retain these documents for at least 3 years after a tenancy ends. If sued, your ability to reconstruct the calculation quickly weakens the tenant’s case and demonstrates good faith.

3. Send Notices 90+ Days in Advance

Never send a rent increase notice with fewer than 90 days’ notice, even if the amount is compliant. The notice requirement is separate from the cap, and a violation of the notice requirement strengthens the tenant’s position and may result in voiding the entire increase.

4. Verify the Current Cap Every Year

Oregon publishes the annual cap in December. For 2027, the cap will be published by December 31, 2026. Add a calendar reminder to check the Oregon Department of Consumer and Business Services website by January 10 each year. Do not assume the cap will stay the same or increase. (It is theoretically possible, though unlikely, for the cap to decrease or remain flat if deflation occurs.)

5. Train Yourself on the Math

The most frequent violations occur because landlords misunderstand how to apply the cap. Remember:

• The cap applies to each rent increase, not annually to the same baseline rent
• If you increase rent by 9% in 2026, you can still increase by up to 10.7% in 2027 (the cap is not cumulative or averaged over time)
• Rounding rules: if the cap is 10.7%, do not round down to 10% or up to 11%; use 10.7% exactly

State-Specific Resources

• Oregon Department of Consumer and Business Services — Publishes annual CPI cap and tenant rights information: www.oregon.gov/dcbs
• Oregon Revised Statutes 90.323 — Full text of the rent increase law: www.oregonlegislature.gov
• Oregon Tenants Union — Tenant advocacy organization; commonly represents tenants in disputes
• Legal Aid & Advocacy Center — Free legal representation for low-income tenants in rent disputes

FAQ: Common Questions About Oregon Rent Increase Penalties

Q1: If I exceed the cap by less than 1%, will I still face penalties?

A: Yes. ORS 90.323(8) provides no de minimis exception. A $15 monthly overage ($180/year) over a 3-year tenancy generates $540 in overcharge and $1,620 in treble damages, plus attorney fees. Courts have consistently ruled that intent or the size of the violation is irrelevant; the violation itself triggers the remedy.

Q2: Can I avoid penalties by returning the overage to the tenant voluntarily?

A: Returning the overage is smart risk management, but it does not eliminate liability if the tenant sues. However, offering reimbursement before a claim is filed may persuade the tenant to settle or not pursue a claim. Once a claim is filed, a full refund plus costs (treble damages and attorney fees) is typically required, and the tenant’s attorney will likely recommend continuing the suit to recover fees. Voluntary refund is a defense to some violations but not a bar to treble damages under ORS 90.323(8).

Q3: Does the cap apply to month-to-month tenancies only, or also to lease renewals?

A: The cap applies to both. When a fixed-term lease expires and is renewed (or converts to month-to-month), the renewal increase is subject to the cap. If a tenant is on a 2-year lease at $1,500/month and the lease expires in 2026, you cannot raise rent above 10.7% effective on the renewal date. The cap has no exception for lease conversions or renewals.

Q4: If inflation drops and the cap decreases, can I reduce rent?

A: No. The cap is a limit on increases, not a mandate for increases. If the 2027 cap is 4% (hypothetically), you are not required to reduce rents. You simply cannot increase rent by more than 4%. Once rent is set, it remains at that level unless you and the tenant agree to a change, or unless the tenant vacates and you sign a new lease with a new tenant (at which point market rate applies).

Q5: What if I increase rent for a legitimate business reason, like the tenant agreed to it in writing?

A: A tenant’s written agreement to an above-cap increase does not make it legal. Oregon courts have ruled that the statutory cap is nondisposable; tenants cannot waive their statutory rights. Even if a tenant signs an agreement accepting a 15% increase, the cap remains 10.7%, and the tenant can sue for treble damages and recover attorney fees. This is a critical point: no consent clause or waiver can override the statutory cap.

Compliance Checklist for 2026 Rent Increases

Compliance Task	Requirement	Status
Confirm current cap	2026 cap = 10.7% (from August 2025 CPI-U)	☐
Identify current rent	Use amount actually paid by tenant	☐
Calculate max increase	Current rent × 0.107 = max increase in dollars	☐
Determine new rent	Current rent + calculated increase (do not round up)	☐
Draft notice	Include: new amount, effective date, cite ORS 90.323	☐
Ensure 90-day notice	Send notice at least 90 days before increase effective date	☐
Deliver notice	Certified mail, email (with read receipt), or hand delivery	☐
Document delivery	Keep proof (tracking number, receipt, confirmation)	☐
File in records	Store notice, calculation, and proof for 3+ years	☐
Track new rent	Update rent roll; ensure tenant is charged correct amount	☐

Why Compliance Matters More Than You Think

Oregon’s rent cap enforcement system is unique because it relies on tenant claims rather than state audits. This creates a false sense of security for many landlords: “If I’ve never been sued, I’m probably doing it right.”

In reality, the absence of a lawsuit does not mean compliance. It often means a tenant doesn’t know their rights. As tenant advocacy groups grow stronger and tenants become more informed (especially in Portland and other urban areas), violations that were ignored five years ago are now resulting in lawsuits.

A single miscalculated rent increase can expose you to $15,000–$30,000 in liability. Across a portfolio of 10–75 units, systematic errors compound exponentially. The cost of compliance—spending 30 minutes per year to verify the cap and automate your calculations—is negligible compared