In California, for most rentals covered by state law, a landlord can raise the rent no more than once every 12 months , and that increase is capped in size by statewide and sometimes local rent‑control rules.

Quick Scoop: How Often Can Rent Go Up?

For most tenants, the key rule is: one rent increase per 12‑month period on the same unit and tenant , with limits on how big that increase can be.

  • Statewide Tenant Protection Act (AB 1482) applies to most multi‑unit buildings and many single‑family rentals owned by companies or large investors.
  • Under AB 1482, the total rent increase in any 12‑month period is limited to 5% plus local inflation (CPI), with an absolute maximum of 10%.
  • Local rent‑control cities (like Los Angeles) can be stricter and usually still use a 12‑month cycle.

So in practice, “how often” is almost always once a year , and “how much” depends on whether your place is covered by state rent caps , local rent control , or is exempt.

Statewide Rules (AB 1482): Once a Year With a Cap

AB 1482 has been in effect since 2020 and is still shaping rent hikes into 2025–2026.

Frequency:

  • Landlords can technically issue multiple increases, but all increases combined in any 12‑month period cannot exceed the legal cap.
  • Because of that cap, most landlords simply do one increase per year to stay compliant.

Amount:

  • The formula: 5% + April CPI for your region, capped at 10% total in any 12‑month period.
  • Example: A region with CPI of 3% → maximum lawful increase = 8% (5% + 3%).
  • As of late 2025 into 2026, many areas fall in the roughly 6–9% range but never above 10%.

Notice requirements (tied to “how often” in practice):

  • If the total increase is 10% or less in 12 months → 30‑day written notice required.
  • If the total increase is more than 10% (for units not covered by the cap, or where local law allows) → 90‑day written notice.

This notice requirement makes frequent small increases impractical, which is another reason landlords tend to raise rent only once per year.

Local Rent Control: Often Stricter Than the State

Some California cities and counties have their own rent‑stabilization ordinances , which may further limit how often and how much rent can be raised.

Example: City of Los Angeles (RSO units)

  • For units under the Los Angeles Rent Stabilization Ordinance (RSO) , the city sets a fixed annual percentage allowed for a 12‑month period.
  • For July 1, 2025 – June 30, 2026, the annual allowable increase is 3% , with some older rules allowing an extra 1% for utilities until they’re phased out.
  • Starting February 2, 2026, the city ties the formula to 90% of CPI , with a floor and ceiling (e.g., 1%–4%), still designed as one increase per 12‑month period.

Example: Unincorporated L.A. County

  • Under the Rent Stabilization and Protection Ordinance (RSTPO) , most covered units had a maximum annual increase of 1.93% for July 1, 2025 – June 30, 2026.
  • Again, this is framed as a maximum yearly increase , effectively one allowable bump per year.

In rent‑control areas, local law usually controls , and you are protected by whichever rule is stronger (local vs. state).

Key Exceptions: When Rules Are Different

Not every unit is covered by rent caps. Whether a landlord can raise rent more often or by more depends on exemptions.

Common exemptions from AB 1482 include:

  • Newer buildings (typically built within the last 15 years under the “rolling” exemption).
  • Some single‑family homes and condos owned by individuals (not corporations), if the landlord gave tenants the required written notice stating the unit is exempt.
  • Certain affordable housing, nonprofit, and dormitory units.

In these exempt cases:

  • State law’s 5% + CPI cap may not apply.
  • The landlord still must follow notice rules (30 or 90 days depending on the size of the increase) and cannot do retaliatory or discriminatory increases.
  • Many landlords still raise rent only once a year to match market practice and avoid disputes.

Mini FAQ: Common Situations

1. Can my landlord raise my rent twice in a year if each increase is small?

  • Under AB 1482–covered units, they can issue multiple increases, but the total of all increases in a 12‑month period cannot exceed the annual cap (5% + CPI, max 10%).
  • Local rent control often treats the allowable increase as one annual adjustment , so multiple hikes may not be allowed there.

2. Do they have to wait exactly 12 months?

  • Practically, yes: the law looks at the preceding 12 months and counts all increases over that period.
  • Many leases also specify rent is reviewed annually , reinforcing that pattern.

3. Is 2026 any different?

  • For the first half of 2026, guidance suggests that the 5% + inflation framework continues until AB 1482’s current term ends mid‑year, after which new rules could further refine rent caps.
  • Local rules, like L.A.’s 3% annual cap for 2025–2026, are already in place and remain stricter.

Quick HTML Table for Reference

Below is a simple HTML table (per your formatting rules) summarizing how often rent can be raised in common scenarios:

html

<table>
  <thead>
    <tr>
      <th>Type of unit / area</th>
      <th>How often can rent be raised?</th>
      <th>Typical cap on increase in 12 months</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>AB 1482–covered unit (most CA rentals)</td>
      <td>Effectively once every 12 months (multiple increases allowed but total is capped)</td>
      <td>5% + regional CPI, maximum 10% total in any 12-month period[web:9]</td>
    </tr>
    <tr>
      <td>Los Angeles City, RSO unit</td>
      <td>Once every 12 months per city formula</td>
      <td>3% allowed July 1, 2025 – June 30, 2026; future years tied to 90% of CPI with a floor and ceiling[web:5]</td>
    </tr>
    <tr>
      <td>Unincorporated L.A. County, RSTPO unit</td>
      <td>Once every 12 months</td>
      <td>1.93% maximum allowable increase July 1, 2025 – June 30, 2026[web:3]</td>
    </tr>
    <tr>
      <td>Exempt units (some new builds, small landlords, etc.)</td>
      <td>No AB 1482 cap; still must follow notice rules and other laws</td>
      <td>No specific percentage cap under AB 1482, but increases must still be lawful and non-retaliatory[web:9]</td>
    </tr>
  </tbody>
</table>

Information gathered from public forums or data available on the internet and portrayed here.