State rules
Massachusetts Security Deposit Rules
Landlord obligations under M.G.L. c.186 §15B
Deposit limit
1 month rent
Maximum lawful security deposit
Return deadline
30 days
After tenancy ends
Interest required
Yes
0.05% annually
Escrow required
Yes
Landlord must hold deposit in a separate account and furnish a receipt within 30 days
Condition statement
Massachusetts requires the landlord to provide a written statement of the unit's condition within 10 days of collecting the deposit. The tenant has 15 days to respond.
Source: M.G.L. c.186 §15B, for the figures shown above. This tool is for informational purposes only and does not constitute legal advice. Consult a Massachusetts attorney for specific guidance.
Deposit limit verified against M.G.L. c.186 §15B as of Jun 23, 2026.