Under M.G.L. c. 186 § 15B, your landlord had 30 days to return your security deposit or itemize deductions. If they blew that deadline, Massachusetts law can make them owe up to 3× the amount they kept.
Massachusetts's security-deposit statute, M.G.L. c. 186 § 15B, gives your landlord 30 days after your tenancy ends to either return your full deposit or send you an itemized list of lawful deductions. This is a hard deadline — not a suggestion.
If your landlord let that window pass without returning your money and without a proper written accounting, they have almost certainly violated the statute — and in most states that alone forfeits their right to keep a single dollar.
This is the leverage most renters don't know they have. Under Massachusetts law, a landlord who wrongfully withholds a deposit can be liable for mandatory treble (3×) damages plus interest, court costs, and attorney fees.
Answer a few questions and we'll generate a letter citing M.G.L. c. 186 § 15B, your exact deadline, and the penalty your landlord now faces — ready to sign and send.
Build my demand letter →Under M.G.L. c. 186 § 15B, your landlord generally has 30 days after your tenancy ends to return your deposit or provide an itemized statement of any deductions. Missing that deadline usually forfeits their right to keep any of it.
Massachusetts law provides for mandatory treble (3×) damages plus interest, court costs, and attorney fees. For example, a landlord who kept a $1,500 deposit in bad faith could be on the hook for as much as $4,500. That exposure is exactly what makes a properly worded demand letter effective.
Usually no. A demand letter that cites M.G.L. c. 186 § 15B, the 30 days deadline, and the penalty your landlord faces resolves most disputes. If it doesn't, security-deposit cases are common and inexpensive in Massachusetts small claims court.
It should state the amount withheld, the date your tenancy ended, the specific statute (M.G.L. c. 186 § 15B), the return deadline your landlord missed, and the statutory penalty they now risk — then demand payment by a firm date. DepositProtector builds this for you automatically.