Free Tool
Massachusetts Security Deposit Calculator
Check if your security deposit complies with Massachusetts law. Maximum: 1x rent. 30-day return deadline.
Your Deposit
$1,800.00
Massachusetts Maximum
$1,800.00 (1x rent)
Return Deadline
30 calendar days after move-out
Massachusetts Security Deposit Rules
Deposit Limits
- Maximum allowed
- 1x rent
- At $1,800.00/mo
- $1,800.00
- Pet deposit
- Not allowed separately
Return & Holding
- Return deadline
- 30 calendar days
- Escrow required
- Yes
- Interest required
- Yes
- Itemized statement
- Required
Interest requirement: Must pay 5% annual interest or actual bank rate
Statute: Mass. Gen. Laws ch. 186 § 15B
Max 1x rent. No last month's rent and deposit together (only one). Must pay 5% interest annually. No pet deposit.
Laws change quietly. California cut its deposit cap to one month in 2024, New York in 2019. Get an email when Massachusetts changes its rules — and what to update in your lease.
Landlord Law Watch — $29/yr →View all states or try the late fee calculator.
Get your state’s full deposit rules in your inbox
Deposit limits, return deadlines, interest rules, and the mistakes that cost landlords their deposit in court. Plus early access to Tenby.
This free tool is brought to you by Tenby — AI-powered property management for independent landlords. No sign-up required.
Try Tenby Free