Security Deposit Interest Calculator

Calculate how much interest your security deposit should earn and whether you are entitled to that interest under your state's laws.

$

The total security deposit held by your landlord

years

How long the landlord will hold your deposit (lease term)

%

The required or agreed interest rate — check your state law or lease

Most state laws use simple interest; check your specific state statute

States like CT, MA, NJ, NY require interest on deposits; verify with your state

Interest You're Owed

Total Return

Annual Interest

Opportunity Cost (vs. 5%)

Enter your numbers to see results.
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How This Calculator Works

Frequently Asked Questions

Which states require landlords to pay interest on security deposits?
States that require interest on security deposits include (among others): Connecticut, Iowa, Maryland, Massachusetts, New Jersey, New Mexico, New York, North Dakota, and Virginia. Rates and requirements vary significantly by state — some require deposits to be held in separate escrow accounts, others only require interest payments above a minimum deposit threshold. Always verify current requirements with your state's tenant rights office.
What is the typical interest rate for security deposits?
State-mandated rates vary from as low as 0.5% to as high as the prevailing passbook savings rate. Many states update the required rate annually. For commercial leases, the interest rate (if any) is a matter of negotiation and should be specified in the lease itself.
What happens if my landlord doesn't pay interest on my deposit?
In states that require it, failure to pay deposit interest can entitle you to penalties — sometimes double or triple the unpaid interest. The unpaid interest may also serve as a defense if the landlord attempts to withhold your deposit for damages. Check your state's specific statutes for the remedies available to you.

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