Massachusetts has the most comprehensive security deposit statute in the US. 30-day deadline. 3× the deposit plus attorney fees for violations. First, last, and security capped at 3 months total. Strict interest requirements.
M.G.L. c. 186, § 15B is extraordinarily detailed and strictly enforced. Massachusetts courts have been consistent and aggressive in applying the 3× penalty. Many landlords who don't comply with the technical requirements lose their right to make deductions even when they have legitimate damage claims. Know every requirement.
Massachusetts has strict limits on what landlords can collect at the start of the tenancy — and violating this triggers immediate consequences.
Massachusetts landlords may only collect, at the start of a tenancy:
That's a maximum of 3 months total (first + last + security). Any amount collected above this — such as an additional "cleaning deposit" or "pet deposit" — is illegal in Massachusetts and must be returned. This is one of the most frequently violated provisions of Massachusetts landlord-tenant law.
Within 30 days of the termination of the tenancy, the landlord must return the security deposit (plus accrued interest) along with a written, itemized list of deductions, or return the full deposit if no deductions are made.
The itemized statement must be delivered to the tenant's last known address. The 30-day period begins when the tenancy terminates — typically when the lease ends and the tenant vacates, whichever is later.
Landlords must pay interest on security deposits annually, at 5% per year (or the rate of interest paid by the bank holding the deposit, if higher). Interest must be paid on each anniversary of the tenancy or at the end of the tenancy, whichever comes first.
If the landlord fails to pay annual interest, the tenant may deduct the accrued interest from any rent owed, or sue for the interest amount. A long tenancy with unpaid interest can be a significant additional recovery.
Example: You had a $2,400 deposit for 5 years. At 5% annual interest, you are owed $120/year × 5 years = $600 in interest alone, in addition to your deposit.
The deposit must be held in a separate, interest-bearing bank account in Massachusetts. Within 30 days of receiving the deposit, the landlord must provide the tenant with a written receipt containing:
Failure to provide this receipt triggers the tenant's right to demand the deposit back at any time during the tenancy. This is a powerful and frequently overlooked tenant right.
Within 10 days after the start of the tenancy, the landlord must provide a written statement of the condition of the premises, listing any existing damage. The tenant has 15 days to amend the statement or note disagreements.
At move-out, the landlord cannot charge for any condition that was documented on the move-in statement (because it was pre-existing). This makes a well-documented move-in statement the most powerful protection a Massachusetts tenant has against damage claims.
If no move-in statement was provided: The landlord loses the ability to prove what damage, if any, you caused — because there is no baseline. Courts are highly skeptical of damage claims from landlords who failed to provide the required move-in statement.
Under M.G.L. c. 186, § 15B(7), if a landlord violates the security deposit law — including missing the return deadline, failing to pay interest, not providing the bank receipt, or failing to provide a move-in condition statement — the tenant is entitled to:
Example: $2,000 deposit, landlord misses 30-day deadline. Tenant recovers: $2,000 × 3 = $6,000 plus interest, attorney fees, and court costs. This is not a theoretical maximum — Massachusetts courts regularly apply it.
The 3× penalty applies to multiple types of violations independently:
Each of these is an independent basis for the 3× penalty. A landlord who violated multiple requirements can face multiple penalty calculations.
For claims over $7,000 (common with the 3× penalty), file in District Court (not small claims). Massachusetts Housing Court handles residential tenancy cases and has specific expertise in deposit disputes. Find your Massachusetts courthouse →
Counter: Massachusetts law requires the higher of 5% or the actual bank rate. In almost all years, 5% is higher than what banks actually pay on savings accounts. The 5% rate is the floor, not a target. Check what rate is stated on the bank receipt they provided. If they never provided a receipt, that's itself a separate violation triggering the 3× penalty.
Counter: First + last + security is legal in Massachusetts, but only if: (1) each is no more than one month's current rent, (2) the security deposit was held in a separate interest-bearing account, (3) you received a receipt with the bank account details within 30 days. If any of these conditions were not met, the entire collection may be voidable and you may be entitled to the 3× penalty on the amount that was improperly handled.
Counter: If the landlord provided a condition statement, you have 15 days to amend or object in writing. If you never received a condition statement, you cannot have failed to respond to it — document that no statement was provided (check your move-in paperwork). Send your objections to any move-in statement via certified mail. Courts look at what the landlord can prove they sent and what you can prove you received.
Counter: Massachusetts courts look at the date of mailing (postmark). A statement postmarked on day 30 may comply with the deadline even if you received it later. However, the statement must also include receipts or documentation for all deductions claimed. If the statement arrived with no backup documentation, it likely doesn't satisfy the statute even if the timing was technically correct.
Counter: There is no "small landlord" exception to M.G.L. c. 186, § 15B. The 3× penalty applies to all landlords, regardless of the size of their portfolio. Courts in Massachusetts have consistently refused to create equitable exceptions to the statute based on landlord size or sophistication.
Use our free analyzer to assess your case. We'll check all the Massachusetts-specific requirements (interest, bank receipt, condition statement) and generate a demand letter citing M.G.L. c. 186, § 15B.
Analyze My Massachusetts Case →