California rent increase laws
Check coverage first, then the permitted amount and the notice. Each is a separate question.
The statewide formula for covered tenancies
12-month cap = the lower of 5% + the applicable cost-of-living change, or 10%
The California Department of Real Estate's 2026 handbook, printed pages 39 and 44, describes this Tenant Protection Act limit for covered continuing tenancies. It also describes no more than 2 increases in a 12-month period. This is a statewide framework, not a verified percentage for your particular address.
Reviewed October 25, 2026. We have not verified your regional CPI period, local ordinance, emergency order or property's coverage. Do not insert today's national inflation rate. Use the applicable official local information before entering a percentage in the rent increase calculator.
Coverage changes the answer
The handbook describes exemptions involving certain subsidized housing, dormitories, housing less than 15 years old, qualifying owner-occupied duplexes, and qualifying separately owned homes or condominiums. Conditions matter: an owner-occupied duplex exemption requires the owner to have lived there when the tenancy began and to still live there; a separately owned home is not automatically exempt.
For the home/condominium category, the guide describes ownership restrictions involving corporations, real-estate investment trusts and certain LLCs, plus a written exemption notice. Its newer-building rule is a rolling age test, not a permanent construction-year cutoff. This page does not evaluate mobilehome tenancies.
More restrictive local rent rules or separate subsidized-housing rules may apply. An exemption from this statewide cap does not establish an unlimited right to raise rent. The handbook directs readers to local housing officials and discusses additional emergency protections (printed pages 39–40 and 46).
Count earlier increases
| Rent in the period | Monthly amount |
|---|---|
| Lowest rent | $2,000 |
| After an earlier increase | $2,120 |
| Proposed amount | $2,240 |
The latest step is about 5.66% of $2,120. But $2,240 is 12% above the $2,000 lookback low. Reviewing only the last step misses the combined increase. The handbook's notice discussion uses the lowest rent and combined increases over the preceding 12 months; the example is not permission to impose a 12% increase.
For a separate arithmetic example, if an independently verified applicable cap were 7%, $2,000 × 1.07 would be $2,140. That 7% is hypothetical, not a published California 2026 rate.
$240 ÷ $2,000 = 12% cumulative change. Hypothetical amounts.
Notice does not replace the cap
For periodic tenancies, the handbook describes at least 30 days' written notice for an increase of 10% or less and 90 days for a larger increase where that increase is otherwise lawful. Fixed-term agreements generally do not permit increases during the term unless the agreement allows them. The notice must identify the changed amount and effective date (printed pages 44–46).
Delivery method, longer contractual or legal periods and subsidized-housing exceptions can change the timing. Do not calculate a legal effective date by simply adding 30 days to today. Our editable rent increase notice leaves the effective date and delivery record for you to verify.
For the periodic tenancies described below. Coverage, service and longer notice requirements still apply; notice never overrides a rent cap.
Questions, answered
What is the California rent increase limit for 2026?
For tenancies covered by the statewide Tenant Protection Act, the government guide describes a 12-month cap of 5% plus the specified cost-of-living change, or 10%, whichever is lower. There is no single percentage we can safely apply to every address: coverage, the applicable CPI period and local rules must be checked.
Does giving 90 days of notice allow an otherwise prohibited increase?
No. Notice length and the lawful amount are separate requirements. A longer notice does not override a rent cap, lease restriction or applicable local protection.
Are all single-family homes exempt?
No. The guide describes ownership conditions and a written exemption notice for qualifying separately owned homes and condominiums. Check the property and tenancy rather than assuming an exemption from the building type.
Source and scope
California DRE, California Tenants, 2026 edition, revised January 1, 2026; printed pages 39–40 and 44–46. Read October 25, 2026. The handbook cites Civil Code §§1947.12 and 827; direct statute text was not independently accessible in this review. This is general legal information, not legal advice or an address-specific determination.
For help finding local assistance, use USAGov's tenant-rights resources (updated April 15, 2026). Related: California security deposits, understanding an annual rent increase and the rent tools and guides.