Free Tool

Security Deposit Interest Calculator

Enter your location, deposit amount, and tenancy dates — we'll calculate the interest owed based on verified local law.

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Property details (optional — used to check exemptions)

Free · No account needed · Based on verified local law

Frequently asked questions

Which cities and states does this cover?

We only publish results for jurisdictions where our legal team has verified the current interest rate and citation. We're adding new cities and states regularly — if yours isn't listed yet, check back soon.

How is the interest calculated?

We use simple interest: deposit amount × annual rate ÷ 100 × (days held ÷ days in that year). If the rate changed during your tenancy, we split the calculation by rate period and by calendar year automatically.

What if my property is exempt?

Some jurisdictions exempt owner-occupied buildings, small buildings under a unit-count threshold, or affordable housing units. Fill in the optional property details and we'll check known exemptions for that jurisdiction.

Is this legal advice?

No. This tool provides an estimate based on our research into published local law and is not a substitute for advice from a licensed attorney. Always confirm current requirements with your local housing authority before making a payment.

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Verified by law

Rates checked against official citations, not estimates

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No account needed

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Full breakdown

See exactly how the total was calculated