Security Deposit Demand Letter
Security Deposit Interest: When Landlords Must Pay You Interest on Your Deposit
Some states require landlords to pay you interest on your security deposit. Learn which states require it, how interest is calculated, and what to do if you weren't paid.
In some states, your security deposit earns interest — and the landlord is required to pay that interest to you when you move out. Most renters don't know this right exists. In states like Massachusetts, failure to pay security deposit interest can result in forfeiture of the entire deposit. Here's where interest is required and how to claim it.
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States That Require Security Deposit Interest
Not all states require interest on security deposits. Here are the states where landlords must pay interest:
States with mandatory interest requirements:
| State | Interest Requirement | Rate |
|---|---|---|
| Connecticut | Required; 5-10 days to pay | Federally insured savings rate |
| Illinois | Required for buildings with 25+ units in select localities | Passbook savings rate |
| Iowa | Required (within 30 days) | Federal funds rate |
| Maryland | Required for deposits over $50 | 3% annually or yield of 90-day US Treasury |
| Massachusetts | Required; strict compliance | 5% or bank rate, whichever is lower |
| New Jersey | Required; 30-day payment | Deposit earns rate of money market account |
| New Mexico | Required | Passbook savings rate |
| New York | Required (NYC only) | Rate set by banking board |
| North Dakota | Required | Rate set by banking department |
| Pennsylvania | Required on deposits held 2+ years | 1% annually |
| Virginia | Required for deposits held 13+ months | London interbank rate |
States without interest requirements: Most states don't require interest — California, Texas, Florida, and many others fall into this category. Landlords in these states can hold deposits in non-interest-bearing accounts.
Local ordinances: Some cities and counties require interest even when state law doesn't. Check local ordinances in addition to state law — particularly in large cities.
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Massachusetts: The Most Stringent Interest Requirements
Massachusetts has some of the strictest security deposit rules in the country, including detailed interest requirements:
Massachusetts requirements (G.L. c. 186, § 15B):
- Landlord must deposit funds in an interest-bearing account in a Massachusetts bank within 30 days of receipt
- Landlord must pay interest annually on the anniversary of the tenancy start OR upon move-out
- Interest rate: 5% per year or the actual bank rate, whichever is lower
- If the bank rate falls below 5%, the landlord pays actual bank rate
- Landlord must provide written notice within 30 days of receiving deposit stating:
- Name and address of bank
- Account number
- Amount of deposit
Failure to comply: This is where Massachusetts gets serious:
- Failure to deposit in an interest-bearing account: Tenant can demand deposit back + landlord cannot use deposit as security
- Failure to pay annual interest: Tenant can use unpaid interest as credit against rent
- Willful violation: 3× amount wrongfully withheld + attorney's fees
The practical application: In a 2-year tenancy at $2,000/month with a $2,000 deposit:
- Interest at 3% year 1: $60 - Interest at 3% year 2: $60 - Total interest owed at move-out: $120 Small individually but a landlord's failure to track this creates meaningful legal liability.
New Jersey: Deposit in Money Market Account
New Jersey has specific requirements for how and where deposits must be held:
New Jersey requirements (N.J.S.A. 46:8-19):
- Security deposit must be deposited in a federally insured money market fund
- Landlord must provide written notice to tenant within 30 days identifying:
- Bank name and address
- Type of account
- Account number
- Amount deposited
- Annual interest must be paid or credited to tenant
- If the deposit is moved to a different account, tenant must be notified within 30 days
Tenant rights:
- If landlord fails to properly deposit and provide notice, tenant can demand return of deposit
- If tenant must sue: recovers deposit + 7% interest + reasonable attorney's fees
Common violations:
- Landlord deposits in regular checking account (not money market)
- Landlord doesn't notify tenant of where deposit is held
- Landlord doesn't pay annual interest
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How to Calculate and Claim Unpaid Interest
If your state requires interest and you didn't receive it:
Calculate what you're owed: Deposit amount × Annual rate × Years held = Total interest
Example (Massachusetts, 3% rate, 2-year tenancy):
- $1,500 deposit × 3% × 2 years = $90
Include in your deposit demand: When you send your demand letter for deposit return, include unpaid interest as a separate line item: 'In addition to the $1,500 security deposit, you owe $90 in unpaid interest pursuant to G.L. c. 186, § 15B, for a total of $1,590.'
If it goes to court: Prepare documentation showing:
- Your tenancy dates
- The deposit amount
- The state-required interest rate
- Calculation showing total interest owed
- Evidence that interest was not paid (no checks, no credits on rent statements)
For states requiring annual payment: If your state requires annual interest payment and the landlord never paid, the accumulated interest from all years is owed at move-out.
Proactive Steps to Protect Your Deposit Interest Rights
Most renters don't know about interest rights. Here's how to proactively protect yours:
Before signing the lease:
- Check your state's security deposit laws for interest requirements
- Ask the landlord directly: 'Will my deposit be held in an interest-bearing account?'
- Request the bank account information in writing
Within 30 days of move-in (where required): Confirm you received written notice of where the deposit is held. If you didn't, send a written request to the landlord for this information. Keep the request and any response.
Annually: If your state requires annual interest payment, note when this payment is due and follow up if not received. In Massachusetts, unpaid interest can be applied as a credit against your rent — document this in writing if you plan to use this remedy.
At move-out: Include interest in your move-out demand letter. Many landlords forget to include interest even when they return the deposit promptly.
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Frequently Asked Questions
Quick answers to the most common questions on this topic.
What interest rate applies to my security deposit?
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It varies by state. Some states fix the rate (Massachusetts: 5% or actual bank rate); some tie it to a benchmark (Treasury rate, federal funds rate); some require the actual bank rate earned on the specific account. Check your specific state's security deposit statute for the applicable rate and method.
If the landlord never told me where my deposit was held, do I have any rights?
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In states that require deposit placement notification (Massachusetts, New Jersey, others), failure to provide this notice can give you the right to demand return of the deposit. In Massachusetts, a landlord who fails to properly notify the tenant forfeits their right to use the deposit as security — meaning they can't claim it for unpaid rent or damages. Check your specific state's notification requirements.
Can I demand interest even if I owe money for damages?
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The interest is owed regardless of whether there are legitimate deductions from the deposit itself. If the deposit is $2,000, interest is $90, and legitimate damage deductions are $500, you should receive $1,590 (deposit minus deductions plus interest). If the landlord is withholding $500 for damages but neglects to pay the $90 interest, that's a separate violation.
What if the landlord commingled my deposit with operating funds?
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In states requiring separate accounts, commingling is an independent violation that strengthens your claim. You have the right to demand your deposit back immediately if it's not being properly maintained in a required separate account. Some states treat commingling as automatic forfeiture of the landlord's right to make deductions.
If I moved frequently and had many landlords, how do I track interest rights?
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For each tenancy in a state requiring interest, you had separate rights. For past tenancies, statutes of limitations may have expired. For current or recent tenancies, review each deposit situation separately. Going forward: make a note at the start of each tenancy in a state with interest requirements about what you're entitled to and when it's due.