How much notice does a landlord have to give?

Commonly 30-90 days depending on the increase size, lease type, and local law — this varies significantly by location.

Does this apply to a fixed-term lease?

Generally a landlord can't raise rent mid-lease unless the lease itself allows it; increases typically apply at renewal or for month-to-month tenancies.

Why does the tool show an 'effective %' for a flat increase?

So you can compare a flat-dollar increase against a percentage-based one on equal footing.

Does this calculator check my local rent-control law?

No — it only computes the math of the increase you enter. Verify against your specific local law separately.

How does a rent increase compound over several years?

Each year's increase applies to the prior year's already-increased rent, so a steady percentage increase compounds — a 5%/year increase roughly doubles rent in about 14-15 years.

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Finance

Rent Increase Calculator

New rent from a % or flat increase, plus the annualized cost impact.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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Last reviewed 2026-08-30

About the Rent Increase Calculator

Calculates a new rent amount from a percentage or flat-dollar increase, plus the annualized cost impact — and flags that rent-control rules and notice-period requirements vary widely by jurisdiction.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Enter your current monthly rent.
Choose % increase or a flat dollar increase.
Enter the increase amount.
Read the new rent and annualized cost impact.

Formula

Increase amount = current rent × (% ÷ 100), or the flat dollar amount entered directly. New rent = current rent + increase amount. Annual added cost = increase amount × 12.

Worked example

$1,800 current rent with a 5% increase: $90/month increase, new rent of $1,890, adding $1,080/year.

Interpreting your result

Whether a landlord can raise rent by this amount, and how much notice they must give, depends entirely on local jurisdiction — some cities/states have rent-control ordinances or increase caps, and notice periods (commonly 30-90 days) vary by location and increase size. This tool only computes the math of an increase you enter; it doesn't check any specific law. Not legal advice.

Recommendations

• A 'flat dollar' increase is a smaller effective % on a higher starting rent than on a lower one — check the effective % shown, not just the dollar figure.
• Check your local tenant-rights agency for actual notice-period and rent-control rules before assuming any increase is enforceable.
• Multi-year rent growth compounds — a steady 5%/year increase roughly doubles rent in about 14-15 years.

Frequently asked questions

It depends entirely on your jurisdiction — some cities/states cap annual rent increases (rent control/stabilization), most don't. Check local tenant-rights resources.