California rent increase calculator

California's Tenant Protection Act (AB 1482) caps rent increases on many rentals at 5% plus the regional CPI change, and never more than 10% in any 12 months. Enter the rent to see your limit and the notice you need. It's free and there's no sign-up.

The rental

CPI is the cost-of-living change for your region. Look up this year's April-to-April figure for your area before you raise rent, since it changes every year.

Common exemptions: buildings first occupied in the last 15 years, single-family homes and condos owned by individuals when the lease has the required exemption notice, and an owner-occupied duplex. Read the full guide.

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What the numbers mean

The cap
Over any 12 months, rent can rise by 5% plus the regional CPI change, or 10%, whichever is lower. It's measured from the lowest rent in the past 12 months, with at most two increases in that time.
Notice
Give 30 days' written notice for a raise of 10% or less, and 90 days for more than 10% (only possible on exempt properties).
Local rent control
Some cities, like Los Angeles, San Francisco and Oakland, have stricter limits. Where a local rule is stricter, it applies instead.

This is general information from the numbers you enter, not legal advice. Setting rent for a new tenant? Get a free rent review, or read AB 1482 explained.