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Check the statewide rent allowance, previous increases and notice timing for California, Oregon or Washington.
Maximum further increase on the proposed date
8.7%$174 per monthNew maximum monthly rent
$2,174For the proposed date, the calculated statewide allowance is $174 more per month, taking rent to $2,174 under these assumptions.
Assumes effective personal service of the notice on October 12, 2026.
Rates as of
Start with the property’s state and the date the higher rent would begin, which sets the cap period. For California, select the county group that matches the Bureau of Labor Statistics metropolitan area; counties outside the four listed metropolitan series use the California CPI-U comparison published by the California Department of Industrial Relations.
Enter the current monthly rent and every prior increase with its effective date and dollar amount. The calculation reconstructs the rent before increases inside the rolling 12-month window, assuming no reductions, concessions, change of tenant or omitted recurring charges in that window.
The notice date is the date effective personal service occurs.
The remaining percentage compares that dollar allowance with the current rent, so it can be smaller than the headline annual cap.
Consider an ordinary covered California rental in the Los Angeles metropolitan CPI area with no local ordinance selected. Current monthly rent is $2,000, there were no previous increases, and the building is 30 years old. The proposed date is December 1, 2026, with effective personal service on October 12, 2026.
The example is a statewide illustration, not an assertion that a Los Angeles city RSO property can use this amount.
California Civil Code 1947.12 specifies the CPI geography, comparison month and August changeover. This version verifies the cycle from August 1, 2026 through July 31, 2027. San Diego and Riverside use March because their April series is not published. The same statute limits covered rent increases to two increments within 12 months.
Oregon’s Department of Administrative Services sets the ordinary residential ceiling for each calendar year. The published values are 9.5% for 2026 and 10% for 2027. ORS 90.323 also restricts increases in the first year, requires ordinary 90-day notice, and limits frequency. Washington Commerce publishes 9.683% for 2026 and 10% for 2027 under RCW 59.18.700. Its ordinary residential notice rule is in RCW 59.18.140.
Choosing Los Angeles RSO, San Francisco, Oakland or Berkeley opens a local-law check. This version links the official local figure and coverage guidance. It does not turn a statewide ceiling into permission for a city-controlled unit, combine banked city allowances or calculate local pass-through charges.
The building-age field measures time since the first occupancy certificate. Use age at the effective date for California, and age at the notice date for Oregon and Washington. California and Oregon have a 15-year new-building test; Washington uses its statutory 12-year test. At an anniversary, check the actual certificate and legal wording.
The exemption checklist is a screening aid. Some exceptions depend on ownership structure, regulated housing agreements, continuous owner occupancy or a written notice to the tenant. A possible exemption leaves the property’s maximum unresolved. For exempt California property, no proposed increase amount is listed, so the calculator cannot decide between the ordinary 30-day and 90-day notice categories.
Manufactured home lots, emergency price restrictions, disputed concessions, fixed-term limitations and unlisted local rules are outside this estimate. Figures for an unpublished future CPI cycle are not forecast or reused.
Notice timing assumes an ordinary monthly residential tenancy and effective personal service, with calendar days counted from the day after service and no mailing or holiday extension. The dollar outputs apply only to the proposed date, and the earliest date is searched only on or after it; a later date can use a different cap or exclude older increases. In Washington, rent includes recurring or periodic charges identified as rent in RCW 59.18.030. The result is not a notice or confirmation of legal compliance.
Ask a lawyer or the local housing authority when city coverage is unclear, an exemption depends on a company or trust, service is disputed, the history contains rent reductions, or an increase is contested.
For a property covered by AB 1482, the annual ceiling is the lower of 5% plus the applicable CPI change or 10%, measured against the lowest rent in the preceding 12 months. Earlier increases consume the allowance. A stricter city ordinance, exemption, emergency rule or lease can change the answer.
CPI is an input to a statutory ceiling, not an automatic rent increase. California uses the specified regional April comparison, or March when April is not published, with a new cycle on August 1. Oregon and Washington publish their own annual limits using different statutory methods.
For covered ordinary residential tenancies, Commerce published 9.683% for 2026 and 10% for 2027. The first 12 months are protected, and the ordinary notice period is at least 90 days. Exemptions and longer local notice requirements must be checked separately.
Oregon DAS published 9.5% for 2026 and 10% for 2027 for ordinary tenancies under ORS 90.323. The first-year restriction, one-increase-per-12-month rule and 90-day notice rule also matter. Manufactured dwelling facilities are outside this calculator.
The building age and checklist screen for possible exceptions, including qualifying affordable housing, dormitories, some owner-occupied duplexes and separately titled properties with qualifying ownership and written notice. A checked box does not prove eligibility. Use the statute, occupancy certificate, ownership records and any local ordinance to confirm.
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