General information only, not legal advice. Laws change. Verify requirements with a licensed attorney or the statute before acting. Last reviewed: June 2026.
Security Deposit · MA
Massachusetts security deposit law
Key rules for landlords and tenants in Massachusetts, cited to MGL c. 186 § 15B.
At a glance
- Max deposit
- 1 month's rent
- Return deadline
- 30 days after move-out
- Interest required
- Yes (Annual interest at 5% or the prevailing passbook savings rate, whichever is lower)
- Statute
- MGL c. 186 § 15B
- Last reviewed
- June 2026
Frequently asked questions
What is the maximum security deposit in Massachusetts?
1 month's rent. (MGL c. 186 § 15B, last reviewed June 2026.)
How long does a landlord have to return a security deposit in Massachusetts?
30 days after move-out. The landlord must provide an itemized statement of any deductions. Failure to return on time may entitle the tenant to penalties under MGL c. 186 § 15B.
Is interest required on security deposits in Massachusetts?
Yes. Annual interest at 5% or the prevailing passbook savings rate, whichever is lower
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