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Rent increase calculator: new rent and state caps

Calculate a new rent from a percentage increase, the extra cost per month and year, and how it compares with the rent caps of California and Oregon.

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Results

New monthly rent

$2,120.00

Increase per month

$120.00

Increase per year
$1,440
California cap (AB 1482: 5% + CPI, max 10%)
8.0%
The proposed increase is within this cap
Oregon cap (7% + CPI, max 10%)
10.0%
The proposed increase is within this cap

How to calculate a rent increase

  • New rent = current rent × (1 + increase ÷ 100)
  • Monthly difference = new rent − current rent
  • Yearly difference = monthly difference × 12
  • Percentage = (new rent ÷ current rent − 1) × 100

Worked example

Your rent is $2,000 and the landlord proposes a 6% increase. Local CPI rose 3%.

  1. New rent: 2,000 × 1.06 = $2,120.
  2. Extra cost: $120 per month, $1,440 per year.
  3. California’s statewide cap would be 5% + 3% = 8%, so 6% is within it.
  4. Oregon’s cap would be 7% + 3% = 10%, which also hits the 10% ceiling.

Statewide rent caps

Most states do not limit how much a landlord can raise the rent between leases, and many prohibit local rent control. A few states set a ceiling:

State Annual cap Main exemptions
California (AB 1482) 5% + regional CPI, max 10% buildings under 15 years old, most single-family homes and condos not owned by corporations
Oregon 7% + CPI, max 10% buildings under 15 years old, some subsidized housing
Washington (2025 law) 7% + CPI, max 10% buildings under 12 years old, some owner-occupied units

On top of these, cities such as Los Angeles, San Francisco, New York City, Washington, D.C. and St. Paul have their own rent stabilization rules, often stricter. Check your city’s housing department for the current percentage, which usually changes once a year.

Notice periods

  • A fixed-term lease generally cannot be raised until it ends, unless the lease says otherwise.
  • For month-to-month tenancies, most states require at least 30 days’ written notice.
  • California requires 90 days for an increase of more than 10%.
  • Some cities require 60 or 90 days for any increase.

Negotiating an increase

  • Compare the new rent with similar listings nearby.
  • Point to your record as a tenant: on-time payments, low turnover cost for the landlord.
  • Offer a longer lease in exchange for a smaller increase.
  • Ask for the increase in writing, and check whether it respects the lease and local law.

This calculator is for general information. Rent rules change often and vary by city; check your state and local housing agency or a tenant rights organization before relying on a cap.

Frequently asked questions

How do I calculate a rent increase percentage?

Divide the new rent by the old rent, subtract 1 and multiply by 100. Going from $2,000 to $2,120 is a 6% increase, or $120 more per month and $1,440 more per year.

How much can a landlord raise the rent in California?

Under AB 1482, most apartments over 15 years old are limited to 5% plus the local CPI change, with a maximum of 10% in any 12 months. Many cities, including Los Angeles and San Francisco, have stricter local rent control.

What is Oregon's rent cap?

Oregon limits yearly increases to 7% plus CPI, capped at 10%, for most units older than 15 years. The state publishes the maximum each year.

How much notice do I need before a rent increase?

It depends on the state and lease. Many states require 30 days for month-to-month tenancies and longer for large increases, such as 90 days in California for more than 10%. A fixed-term lease usually cannot be raised until it ends.

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Results are estimates provided for information purposes. They do not replace professional advice.

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