Key Takeaways
- Oregon caps rent increases at the percentage increase in the Consumer Price Index (CPI) published by the U.S. Bureau of Labor Statistics — ORS 90.323(2) sets this as the legal ceiling for annual increases, with no flat dollar amount permitted.
- You must provide written notice at least 90 days before the rent increase takes effect — failure to give proper notice voids the increase and may trigger tenant claims for wrongful rent collection.
- The CPI figure you must use is the “Consumer Price Index for All Urban Consumers (CPI-U)” for the Portland-Salem-Eugene area — using a different CPI index or national figure violates the statute.
- Rent increases are prohibited within the first year of tenancy — even if CPI exceeds zero, you cannot raise rent on new leases until month 13 or the lease renewal date.
- Violations result in the increase being void, plus tenant claims for unjust enrichment and statutory damages — Oregon courts have awarded tenants full refunds plus penalties.
- The CPI figure changes annually on July 31st — you must use the most recent published data when calculating increases for rent due on or after the effective date.
What Is Oregon’s Rent Increase Cap?
Oregon has one of the nation’s strictest rent increase caps. Under ORS 90.323(2), the maximum allowable annual rent increase is tied directly to the Consumer Price Index (CPI) published by the U.S. Bureau of Labor Statistics.
This is not a percentage you set. It is not negotiable. It is not a guideline. It is a hard legal ceiling. Any rent increase that exceeds the CPI percentage is unenforceable under Oregon law, and tenants can challenge the increase in court or before the Bureau of Labor and Industries (BOLI).
The statute reads: “The owner of a rental unit may not increase rent in an amount that exceeds the percentage change in the Consumer Price Index for All Urban Consumers (CPI-U) for the Portland-Salem-Eugene area.” This language is absolute. There are no exceptions for market conditions, property improvements, or increased operating costs (outside of utilities covered under separate utility billing arrangements).
Unlike some states that allow a flat percentage increase (e.g., 3% annually) or tie increases to inflation with a cap-and-floor formula, Oregon’s approach is inflation-only with zero guaranteed increase. If CPI is negative (deflation), you cannot raise rent at all. If CPI is 0.5%, you cannot raise rent by 1%.
Understanding the CPI-U and the Correct Index to Use
Many landlords make a critical error: they use the national Consumer Price Index instead of the Portland-Salem-Eugene regional index, or they use the wrong month’s data. Both mistakes create legal exposure.
You must use the CPI-U (Consumer Price Index for All Urban Consumers) for the Portland-Salem-Eugene, Oregon metropolitan area.
The Bureau of Labor Statistics publishes CPI data monthly, but Oregon’s statute requires use of the specific regional index. The Portland-Salem-Eugene area includes Multnomah, Washington, Clackamas, Marion, Polk, and Yamhill counties. If your rental property is outside this region, you still use this index under ORS 90.323(2)—the statute does not carve out exceptions for rural areas or other Oregon regions.
The critical timing rule: The CPI figure you must use is published on or about the 31st of July each year. This figure represents the 12-month change in the index ending in June. You use this annual July release to calculate increases that take effect on or after August 1st of that year.
For example:
- The July 31, 2026 CPI-U release shows a 2.8% increase in the Portland-Salem-Eugene index for the 12-month period ending June 2026.
- You can notify tenants on or after August 1, 2026 that their rent will increase by up to 2.8%.
- The increase takes effect no sooner than 90 days after notice (minimum November 1, 2026).
- You cannot use the July 31, 2025 CPI figure (even if it was higher at 3.1%) to justify a 3.1% increase in November 2026.
You can access the correct CPI figure from the Bureau of Labor Statistics website (bls.gov) or request historical data. Many landlord associations and property management platforms publish the annual Oregon CPI figure shortly after the July 31st release to help landlords comply.
Step-by-Step: How to Calculate Your Rent Increase Correctly
Step 1: Determine Your Notice Timing and the Correct CPI Figure
Before you calculate anything, establish when you want the increase to take effect. This determines which CPI figure you must use.
Rule: You must provide written notice at least 90 days before the first rent payment at the increased amount is due.
If you want an increase effective November 1, 2026, your notice must be delivered by August 1, 2026 at the latest. The CPI figure applicable to that increase is the one published on July 31, 2026 (covering the 12-month period ending June 2026).
If you miss the August 1 deadline, you cannot use that CPI figure for a November 1 increase. You must wait until you can give proper 90-day notice using the next available CPI figure (published July 31, 2027).
Step 2: Locate the Correct CPI-U Figure for Portland-Salem-Eugene
Visit the BLS website and navigate to their CPI tables for Portland-Salem-Eugene, Oregon (Series ID APUS49A74714): All items in U.S. city average, not seasonally adjusted. Look at the annual average for the most recent 12-month period.
Example data (hypothetical for illustration):
| Period | CPI-U Index Value | Percentage Change |
|---|---|---|
| June 2025 (12-month) | 315.7 | — |
| June 2026 (12-month) | 324.1 | 2.66% |
The BLS website typically calculates and displays this percentage change for you. Record this figure accurately—rounding errors matter.
Step 3: Calculate the New Rent Amount
Multiply the current monthly rent by the CPI percentage increase (expressed as a decimal).
Formula: New Rent = Current Rent × (1 + CPI percentage)
Example:
- Current rent: $1,400/month
- CPI percentage: 2.66%
- Calculation: $1,400 × (1 + 0.0266) = $1,400 × 1.0266 = $1,437.24
- New rent: $1,437.24/month
You may round to the nearest penny, but you cannot round up beyond what the formula produces. If the calculation yields $1,437.24, you cannot charge $1,437.50 or $1,438. Rounding that increases the effective percentage above CPI violates ORS 90.323(2).
Step 4: Prepare Written Notice
The notice must be in writing and must include:
- The current rent amount
- The new rent amount
- The effective date (no sooner than 90 days from delivery of notice)
- Clear statement that this is a rent increase under ORS 90.323(2)
- The CPI percentage used (optional but recommended for transparency and compliance documentation)
Oregon law does not prescribe a specific notice form, but your notice must be clear and unambiguous. Avoid language that could be interpreted as a conditional increase or one tied to other factors (e.g., “increased costs” or “market rates”). State only the increase amount and effective date.
Recommended language: “This is notice of a rent increase under Oregon Revised Statute 90.323(2). Effective [date], your rent will increase from $[current] to $[new] per month. This increase reflects the Consumer Price Index increase published by the U.S. Bureau of Labor Statistics.”
Step 5: Deliver Notice and Maintain Proof of Delivery
Deliver the notice in writing. Oregon law permits delivery by:
- Hand delivery (in person)
- Certified mail or first-class mail to the tenant’s address on file
- Email (if the tenant has agreed to electronic notice)
- Door posting (if the tenant cannot be located after reasonable efforts)
Proof of delivery is critical. If a tenant later disputes whether they received proper notice, you bear the burden of proving timely delivery. Keep:
- A signed delivery receipt (for hand delivery)
- USPS mail tracking (for certified mail)
- Email read receipts or delivery confirmations
- Photos showing posted notice with date stamp
- Your own dated records of when notice was sent
Without proof, a tenant can claim you failed to give 90 days’ notice, which voids the increase entirely.
Critical Compliance Rules You Cannot Violate
No Increases in the First Year
Under ORS 90.323(3), you cannot increase rent during the first year of a tenancy. This applies even if the tenant has been there for 11 months and CPI is rising. The prohibition is strict: “During the first year that a tenant occupies a rental unit, the owner may not increase the rent.”
The first year runs from the commencement date of the tenancy (the date the tenant takes occupancy), not from the lease signing date. If a tenant moves in on March 15, 2026, the first-year prohibition ends on March 15, 2027. You cannot raise rent until the first increase takes effect on or after March 15, 2027 (with 90 days’ notice).
The 90-Day Notice Requirement Is Non-Negotiable
ORS 90.323(2) requires notice “at least 90 days before the rent increase takes effect.” This is not 90 days before you can *propose* an increase or 90 days before you *intend* to increase. It is 90 days before the tenant’s rent payment at the new amount is due.
If rent is due on the 1st of each month:
- To increase rent effective November 1, 2026, notice must be delivered by August 1, 2026.
- Notice delivered on August 2, 2026 allows the increase to take effect no earlier than November 2, 2026 (91 days later).
- Notice delivered on August 2, 2026 for a November 1, 2026 effective date is insufficient and voids the increase.
Do not rely on informal notices, text messages, or verbal conversations. Written notice is mandatory. Do not assume a tenant understood an increase because you mentioned it in passing.
No Increases Above the CPI Percentage
You cannot justify an increase above CPI by citing property improvements, increased property taxes, insurance costs, or market conditions. ORS 90.323(2) is a ceiling. There are no exceptions.
If a tenant makes significant improvements to the unit (e.g., adds a built-in bookshelf at their own expense), you still cannot increase rent above CPI.
If your property taxes increase by 15% in a given year, you still cannot increase rent above CPI.
The only exception is for utilities. If you provide utilities and the cost increases, you may adjust the rent to reflect the increased utility cost, separately and in addition to the CPI increase, under ORS 90.320(15). This requires a written addendum and specific documentation of utility costs. Do not assume you can bundle a utility adjustment into the CPI increase; they are separate calculations.
What Happens If You Violate the Rent Increase Rules
The Increase Is Void
If you increase rent in violation of ORS 90.323, the increase is not enforceable. You cannot collect the higher rent amount. A tenant can refuse to pay the increased amount, and a court will not order them to do so.
Tenant Claims for Damages
A tenant can file a claim against you for:
- Unjust enrichment: The difference between what you illegally collected and what you should have collected, refunded in full.
- Statutory damages: Some Oregon courts have awarded tenants penalties under ORS 90.100 (civil remedies for landlord violations).
- Attorney fees: If a tenant retains a lawyer to challenge an illegal increase and prevails, you may be ordered to pay their attorney fees.
Oregon courts interpret ORS 90.323 strictly in favor of tenants. Ignorance of the law is not a defense.
BOLI Complaints and Administrative Action
A tenant can file a complaint with the Oregon Bureau of Labor and Industries (BOLI), which enforces landlord-tenant law. BOLI can investigate, mediate disputes, and issue cease-and-desist orders. Repeat violations can result in BOLI referring cases to the Oregon Attorney General for civil enforcement.
Eviction Risk If You Attempt Collection
If you attempt to evict a tenant for non-payment of an illegally increased rent, the tenant can raise the illegality as a defense. An Oregon court will dismiss the eviction, and you may face a counterclaim for damages. Attempting to evict based on an illegal rent increase is a form of retaliatory conduct under ORS 90.385.
2026 CPI Data and Practical Examples
As of July 2026, Oregon landlords should use the CPI-U figure published on July 31, 2026, covering the 12-month period ending June 2026. (At the time of this article’s publication in July 2026, the exact percentage is available through the BLS website.)
For planning purposes, here are scenarios showing how the calculation works:
| Current Rent | CPI: 2.0% | CPI: 2.5% | CPI: 3.0% |
|---|---|---|---|
| $1,200 | $1,224 | $1,230 | $1,236 |
| $1,500 | $1,530 | $1,537.50 | $1,545 |
| $2,000 | $2,040 | $2,050 | $2,060 |
These examples illustrate why precision matters. If you own 20 units and misunderstand the CPI figure by 0.5%, you could be collecting illegally increased rent from dozens of tenants simultaneously.
Compliance Checklist: Before You Issue a Rent Increase Notice
Use this checklist to avoid violations:
- ☐ Verify the tenant’s first-year status: Is this tenant past the 12-month mark of their tenancy? If not, stop. No increase is allowed.
- ☐ Obtain the correct CPI-U figure: Have I retrieved the Portland-Salem-Eugene CPI-U from the BLS website for the correct month (July publication date)? Have I recorded the exact percentage change?
- ☐ Calculate the new rent amount: Have I used the formula: Current Rent × (1 + CPI%)? Have I checked my math twice?
- ☐ Determine the effective date: Will the new rent take effect at least 90 days after I deliver notice?
- ☐ Draft written notice: Have I prepared a clear, written notice (not verbal, not email without confirmation of receipt)? Does it state the current rent, new rent, and effective date?
- ☐ Deliver notice properly: Have I delivered the notice by a method that creates proof (certified mail, hand delivery with receipt, email with read receipt)?
- ☐ Document everything: Have I retained a copy of the notice, proof of delivery, the CPI figure used, and my calculation worksheet?
- ☐ Wait the full 90 days: Have I counted forward from the delivery date to confirm the effective date is at least 90 days away?
How Compliance Software Can Prevent Costly Errors
Many self-managing landlords rely on spreadsheets, email, or memory to track rent increase deadlines and calculations. This approach creates risk. One missed deadline, one rounding error, one tenant dispute—and you’re facing a legal claim.
A compliance-aware platform like LeaseBase’s rent payment tools can automate the tracking of when tenants become eligible for increases (first-year block), store the correct CPI-U data for your state, calculate increases precisely, and alert you when the 90-day notice window opens. The system generates compliant notice templates and logs delivery proof.
Paired with LeaseBase’s compliance engine, you can verify that each increase adheres to Oregon law before it takes effect. This removes guesswork and gives you confidence that you’re not exposing yourself to tenant claims or BOLI complaints.
For landlords managing multiple units, this automation is not a convenience—it is essential. One illegal increase across 10 units could cost you thousands in refunds and legal fees.
FAQ: Oregon Rent Increase Calculation
Q1: Can I increase rent by a flat amount instead of a percentage (e.g., $50 per month)?
No. ORS 90.323(2) explicitly limits increases to the CPI percentage. You cannot offer a choice between a percentage and a flat amount, and you cannot increase by any amount the statute does not permit. Flat-dollar increases are void under Oregon law, even if the tenant agrees to them.
Q2: If CPI is negative (deflation), can I leave rent flat instead of decreasing it?
Yes, with a critical caveat. Oregon law does not permit you to increase rent above CPI, but it also does not require you to decrease rent if CPI is negative. You may maintain the current rent. However, once you establish a rent amount, you are bound by it until the next annual increase opportunity. You cannot argue that you “would have decreased rent if deflation had continued”—the choice is binary: increase within the CPI ceiling, or maintain current rent.
Q3: What if the tenant disputes the CPI figure I used? Who bears the burden of proof?
You do. If a tenant challenges an increase as exceeding CPI, you must prove that you used the correct Portland-Salem-Eugene CPI-U figure from the BLS and that your calculation is accurate. You should retain documentation: screenshots of the BLS website showing the figure, your calculation worksheet, and the date you obtained the data. Without this proof, a court will likely invalidate the increase and award damages to the tenant.
Q4: Can I increase rent if the tenant hasn’t paid utilities, and I’m trying to recover those costs?
Not through the standard CPI increase. Utility cost recovery is a separate mechanism under ORS 90.320(15). If you provide utilities and costs increase, you must calculate a utility adjustment separately from the CPI increase. The utility adjustment must be supported by documentation of actual utility cost increases. It is not included in the CPI increase amount. Mixing the two is a violation.
Q5: If I own properties in multiple Oregon counties, do I use different CPI figures for each?
No. ORS 90.323(2) requires use of the “Portland-Salem-Eugene area” CPI-U regardless of where the rental unit is located. Even if you own a property in Bend or Klamath Falls, you use the Portland-Salem-Eugene figure. Oregon has not established separate CPI benchmarks by region.
Key Dates and Deadlines for July–December 2026
| Date | Action |
|---|---|
| July 31, 2026 | BLS publishes CPI-U for Portland-Salem-Eugene (12-month period ending June 2026). Landlords can now use this figure for increases effective November 1, 2026 or later. |
| August 1, 2026 | Deadline to deliver notice for November 1, 2026 increases (90 days before effective date). |
| November 1, 2026 | First rent increase based on July 2026 CPI figure takes effect (for notices delivered by August 1). |
| December 1, 2026 | Last possible effective date for increases using July 2026 CPI figure (notices must be delivered by September 1, 2026). |
Resources for Accurate CPI Data
- U.S. Bureau of Labor Statistics (BLS): bls.gov — Search “Portland-Salem-Eugene” CPI-U data. Series ID: APUS49A74714.
- Oregon Bureau of Labor and Industries (BOLI): oregon.gov/boli — Enforcement agency; file complaints or request guidance on compliance.
- Oregon State Bar Lawyer Referral Service: oregonstatebar.org — Find an attorney for questions specific to your property or tenancy.
- LeaseBase Compliance Engine: LeaseBase.com — Oregon-specific rent increase calculator and notice templates.
Bottom Line: Compliance Is Mandatory, Not Optional
Oregon’s rent increase law is strict. There is no room for approximation, rounding discretion, or “close enough” calculations. You must use the correct CPI figure, provide 90 days’ written notice, respect the first-year ban, and calculate the increase to the penny.
Violations expose you to tenant claims for unjust enrichment, attorney fees, and potential agency complaints. The cost of getting it wrong—in refunds, legal fees, and lost rent—far exceeds the modest increases Oregon law allows.
Take the time to do it correctly. Verify the CPI figure directly from the BLS, double-check your math, prepare a clear written notice, and retain proof of delivery. Document your compliance process. If you manage multiple units, use a system that automates these calculations and logs compliance steps.
Compliance is not a burden—it is the foundation of predictable, defensible rent management.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation, property location, tenancy details, or disputes. Oregon landlord-tenant law is complex and subject to administrative interpretations. This article reflects the law as of July 2026 and may not account for subsequent legislative or judicial changes.









