How much notice is required for a rent increase in California?
California requires at least 30 days' written notice before a rent increase can start on a month-to-month tenancy. Verbal notice is not enough.
Step-by-step answer
- Step 1
What counts as valid notice
A valid rent-increase notice in California is delivered in writing, states the new rent amount, states the date the new rent starts, and gives you at least 30 full days before that date. A text message or a hallway conversation is generally not enough on its own.
- Step 2
What to do if the notice was short
Keep the notice and the envelope (or a screenshot with a timestamp). Reply in writing that the notice does not meet California's 30-day rule and that you'll continue to pay the current rent until a proper notice is delivered. A local tenant-rights group can help you draft the letter.
California requires at least 30 days' written notice before a rent increase can start on a month-to-month tenancy. Verbal notice is not enough.
The numbers that decide it
- Statewide formula
- 5% + regional CPI
- Cal. Civ. Code §1947.12
- Hard ceiling
- 10%
- The total can never exceed 10% in any 12-month period for covered units
- Typical 2026 cap in most metros
- ≈8–10%
- Depends on your regional CPI figure — check yours before relying on it
- Notice
- 30 or 90 days
- 90 days when the 12-month increase is more than 10%
Figures change — verify against the official source before relying on them.
Worked example
Worked example: $2,000 rent in Los Angeles
- Start with the current rent: $2,000 per month.
- Check coverage. AB 1482 generally covers units at least 15 years old; many new builds, some single-family homes, and owner-occupied duplexes are exempt, and your notice should state which applies.
- Look up your regional CPI figure. If it is 3.5%, the cap is 5% + 3.5% = 8.5%.
- Apply it: $2,000 × 0.085 = $170, so the highest covered rent would be about $2,170.
- Compare the ceiling: 10% of $2,000 is $200, so even a high CPI year would stop around $2,200.
- If the notice says $2,400, that is 20%. On a covered unit that appears to exceed the statutory cap, and because the increase is over 10% it would also generally require 90 days' notice rather than 30.
- If your city has its own stabilization ordinance (Los Angeles, Santa Monica, Oakland, San Francisco, Berkeley), the local cap is often lower and controls instead.
Two numbers decide most California cases: your regional CPI and whether the unit is covered at all. Get both before responding in writing.
Where these rules come from
- Cal. Civ. Code §1947.12 (AB 1482)
The statewide cap: 5% plus regional CPI, never more than 10% total, for most covered units at least 15 years old.
- Cal. Civ. Code §827(b)
Notice rules on month-to-month tenancies: generally 30 days, or 90 days when the increase over 12 months is more than 10%.
- California CPI figures used for the cap
The regional CPI series landlords must use when calculating the 5% + CPI figure for your area.
Check your specific situation
Where do you rent?
Free legal help in California
Walk through three quick steps to find the right tenant-rights program for your situation.
State listings sourced from the federal Legal Services Corporation (LSC) grantee directory. Educational information, not legal advice or endorsement.
Other common questions about California
State source
Related tenant tools
Free, no-login tools that work together with this one.