Massachusetts Security Deposit Law 2026 — Strict Compliance Or Triple Damages

Massachusetts G.L. c. 186 § 15B is one of the most punishing security deposit statutes in the United States. Keep the deposit outside a separate Massachusetts bank account, fail to transfer it to the new owner when the property changes hands, or return it late, and the tenant is awarded three times the deposit (or the balance owed), plus 5% interest, court costs and attorney's fees. Other misses cost you the right to keep any of the deposit, or its immediate return — and on last month's rent paid in advance, unpaid interest costs three times the interest. Many Massachusetts attorneys advise their landlord clients to simply not collect a security deposit — that is how unforgiving the rules are.

If you operate residential rentals in Massachusetts, the deposit statute is the single legal area where small operators face the most disproportionate downside. A clean operation pays no penalty. Some violations forfeit the deposit or require its immediate return; three specific failures also trigger mandatory triple damages. Here is the 2026 compliance map.

The deposit cap and the rolling list of required steps

Massachusetts caps the security deposit at one month's rent. You may also collect first month's rent, last month's rent at the same rate as the first, and the purchase and installation cost of a new lock and key — and last month's rent carries its own paperwork.

For the security deposit specifically, the statute requires you to:

1. Provide a receipt for the deposit at the time it is paid, identifying the amount, the date, the unit, the name of the person receiving the deposit, and the name of the landlord
2. Hold the deposit in a separate, interest-bearing account in a Massachusetts bank, on terms that put it beyond the reach of your creditors (including a foreclosing lender or bankruptcy trustee) and provide for its transfer to a later owner
3. Within 30 days of the deposit, give the tenant a receipt identifying the name and location of the bank, the account number, and the amount of the deposit
4. Provide a Statement of Condition when you receive the deposit, or within 10 days after the tenancy starts if that is later, listing all existing damages
5. Pay interest annually if you hold the deposit for a year or more, at 5% per year or the lower rate the bank actually paid
6. At the end of the tenancy, return the deposit within 30 days after the tenancy ends (the end date in a written lease, or the end of occupancy under a tenancy-at-will), minus permitted deductions — with a sworn itemized list and cost evidence for any damage deduction

Each step has its own deadline and its own consequence for non-compliance. The statute lists specific violations that trigger forfeiture, and three of them also trigger triple damages — and the wording is mandatory: the landlord "shall forfeit" and the tenant "shall be awarded" damages, not "the judge can choose to award them."

The Statement of Condition — where most landlords fail

The Statement of Condition is the document most non-compliant landlords miss entirely. The statute requires that when you receive the deposit, or within 10 days after the tenancy starts if that is later, you provide a written list of all existing damages in the unit. The statement must carry the statute's exact notice in 12-point bold-face type at the top of the first page, telling the tenant to sign it if it is correct or attach a separate signed list of any damage they believe exists, and return it within 15 days after receiving it or 15 days after moving in, whichever is later.

Without a Statement of Condition you may not require a security deposit at all: § 15B(1)(b)(iii) allows the deposit only "provided ... that the tenant is given the statement of condition". It is also your baseline at move-out — nothing may be deducted for damage the statement already lists (unless you repaired it and can prove the new damage is unrelated and tenant-caused), and without one you cannot show which damage came later.

The Statement must describe the present condition of the premises, comprehensively list any damage then existing (including sanitary or building code violations certified by a board of health or building official, or adjudicated by a court), and be signed by you or your agent; the tenant signs it if they agree it is correct. Going room by room and taking dated photos of every room for the file makes that listing easier to defend. The 10-day deadline is firm.

The 30-day bank notice

Within 30 days of receiving the deposit, you must give the tenant a receipt identifying:

• The name of the bank where the deposit is held
• The location of the bank
• The account number for the deposit
• The amount of the deposit

This receipt can be in the lease itself if the deposit and account are set up before lease signing. More often, it is a separate letter sent shortly after move-in once the funds clear and you have an account number.

A landlord who fails to provide this receipt within 30 days can be made to give the deposit back: failure to comply with § 15B(3)(a) — the account or the receipt — entitles the tenant to its immediate return.

Annual interest and the 5% ceiling

If you hold the deposit for a year or more from the start of the tenancy, you must pay the tenant interest, from the first day of the tenancy, at 5% per year or the lower rate the bank actually paid. The interest is:

• Paid to the tenant at the end of each year of the tenancy, OR deducted by the tenant from the next rent payment if, 30 days after that anniversary, they have received neither the interest nor your notice to deduct it, AND
• Paid in full within 30 days if the tenancy ends before an anniversary

You must give the tenant a written statement each year identifying the bank, the account and the interest amount. Interest not returned with the deposit within 30 days after the tenancy ends is a failure under § 15B(6)(e), which carries forfeiture and the treble-damages award described below. (For last month's rent paid in advance, interest unpaid 30 days after the tenancy ends costs three times the interest, plus court costs and attorney's fees.)

Many Massachusetts landlords skip this entirely on long tenancies — and then a tenant who learns the rule years into the lease claims the full accumulated interest plus the violation remedy.

Returning the deposit at end of tenancy

Within 30 days after the tenancy ends, you must return the deposit (with accumulated interest) minus permitted deductions. For any damage deduction, you must provide within those 30 days an itemized list that includes:

• A specific description of each item of damage
• The reasonable cost of repair, supported by written evidence such as estimates, bills, invoices or receipts
• Your (or your agent's) oath under pains and penalties of perjury: the itemized list itself must be sworn

That last requirement — a statement under penalty of perjury — is the kicker. The itemization is not just a list; it is a sworn statement. False or unsupported deductions expose the landlord to perjury risk in addition to the contract claim.

Deductible items — the statute lists them and nothing else may be deducted: unpaid rent or water charges, an unpaid real estate tax increase owed under a valid tax escalation clause, and the reasonable cost of repairing damage caused by the tenant (or someone there with their consent), reasonable wear and tear excluded. Not deductible: normal wear and tear, any damage already listed on the Statement of Condition (unless you repaired it and can prove the renewed damage is unrelated and was caused by the tenant or someone there with their consent), cleaning or any other charge the statute does not name.

The triple-damages remedy and how it accrues

Subsection (6) lists five failures that forfeit your right to keep any part of the deposit; three of them — clauses (a), (d) and (e) — also carry treble damages under subsection (7). Other parts of the statute add their own remedies. The big ones:

"Treble damages" under § 15B(7) means three times the security deposit or the balance the tenant is entitled to, plus 5% interest from the date payment was due, court costs and reasonable attorney's fees. A $2,500 deposit with one of those three violations can produce a $7,500+ judgment, plus the tenant's legal fees. Tenant-side legal services and private plaintiff's attorneys actively bring these cases.

Practical recommendation for small operators

Many Massachusetts attorneys advise smaller landlords to simply not collect a security deposit, because the procedural exposure outweighs the financial protection. The alternative cushion is the last month's rent (which has its own, slightly less onerous rules under § 15B) plus a higher-quality screening process.

If you do collect a security deposit, build a compliance workflow that is mechanical:

1. Receipt at the moment of payment, photographed and filed
2. Funds wired same-day to a separate, interest-bearing account at a Massachusetts bank
3. 30-day bank receipt on the calendar
4. Statement of Condition delivered at lease signing with photos attached
5. Annual interest notice calendared and processed every anniversary
6. 30-day itemization calendared from the day the tenancy ends

Software that handles the trust account ledger, calendars each statutory deadline, and stores receipts and Statements of Condition against the tenant record — exactly what Proprietio's trust accounting and lease modules cover — is the difference between a routine operation and a triple-damages judgment. For Massachusetts more than any other state, the software's value is procedural.

FAQ

Can I collect last month's rent and a security deposit? Yes, but each is subject to its own rules under G.L. c. 186 § 15B. Last month's rent has its own receipt, interest and annual-statement requirements. Security deposit has the full set of receipt, escrow, notice, statement of condition, and interest requirements outlined above.

What if I'm a small landlord with one or two units — does the law still apply? Yes. The statute applies regardless of portfolio size: it contains no small-landlord exemption. Its one stated exclusion is a lease or rental of 100 days or less for a vacation or recreational purpose.

Can I just not take a deposit? Many Massachusetts attorneys advise exactly this for small operators. The exposure on a procedural violation outweighs the protection. Some landlords substitute last month's rent (which has somewhat lighter requirements) plus stronger upfront screening.

What happens if I miss the 30-day return deadline by a few days? Even short delays expose you to the treble damages remedy: missing the 30 days is a failure under § 15B(6)(e), and § 15B(7) says the tenant "shall be awarded" damages. The deadline is mechanical, not discretionary. Calendar it from the day the tenancy ends — the end date in a written lease, or the end of occupancy under a tenancy-at-will — and treat it as inviolable.

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This isn't legal advice. Consult an attorney licensed in Massachusetts for specifics in your county.