Massachusetts landlords should treat security deposits as compliance money, not operating money. The rules in G.L. c. 186, § 15B are detailed, and seemingly minor mistakes can affect a landlord’s right to retain any portion of the deposit and, in some circumstances, expose the landlord to multiple damages, interest, court costs, and attorney’s fees.
Do not collect more than one month’s rent as a security deposit
Massachusetts law generally limits a residential security deposit to no more than one month’s rent. At or before the start of a tenancy, the landlord may generally require the first month’s rent, the last month’s rent, a security deposit not exceeding one month’s rent, and the cost of purchasing and installing a lock and key, subject to the statute and other applicable rules.
Do not treat a security deposit as an opportunity to add extra move-in charges. Massachusetts changed its broker-fee rules effective August 1, 2025, and landlords should separately confirm the legality of any other upfront charge rather than assuming it can be bundled into the deposit.
Give a receipt when you receive the security deposit
When a landlord or agent receives a security deposit, the tenant should receive a signed receipt identifying the amount, the person receiving it, the date, and the premises. If an agent receives the money, the receipt should also identify the landlord for whom the money was received.
This first receipt is different from the later bank-account receipt. Landlords should keep copies of both.
Provide the required statement of condition
A landlord who accepts a security deposit must provide a separate written statement of the present condition of the premises. Under G.L. c. 186, § 15B, the statement must be furnished upon receipt of the deposit or within ten days after the tenancy begins, whichever is later.
The statement should comprehensively identify existing damage and include the statutory notice in the required form. The landlord or agent should sign it.
The tenant then has an opportunity to agree with the statement or return a signed list of additional damage. If the tenant submits a separate list, the landlord must respond within the statutory period by agreeing or clearly stating the disagreement.
This document matters later. A landlord generally cannot deduct for damage that was already listed as pre-existing unless the earlier damage was repaired and the landlord can show that the later damage was new and caused by the tenant or someone for whom the tenant is responsible.
Photograph and document the unit at move-in
The statute requires the written condition process, but good documentation should go further. Dated photographs and video can help show the condition of flooring, walls, appliances, fixtures, windows, doors, bathrooms, and other areas at the beginning of the tenancy.
Keep the original files when possible. Label them by unit and date. Do not rely only on a few wide-angle photographs that make it difficult to identify specific conditions later.
The written condition statement remains important even when photographs exist. Photos are evidence; they are not a substitute for the statutory paperwork.
Put the deposit in a separate Massachusetts interest-bearing account
A tenant’s security deposit remains the tenant’s property unless the landlord becomes legally entitled to use part of it. Massachusetts law requires the deposit to be held in a separate, interest-bearing account in a Massachusetts bank under terms that keep it beyond the reach of the landlord’s creditors.
Do not put the money into the landlord’s ordinary operating account. Do not mix it with rent receipts, repair funds, or other business money.
Within 30 days after receiving the deposit, the landlord must provide the tenant with written information identifying the bank, the amount of the deposit, and the account number. Failure to comply with the account requirements can give the tenant an immediate right to the return of the security deposit and can impair the landlord’s ability to retain any part of it.
Keep a security-deposit file for each tenancy
A landlord should maintain a separate file for every tenancy in which a security deposit is collected. That file should include at least:
- The signed security-deposit receipt.
- The statement of condition and any tenant response.
- Move-in photographs or video.
- The bank-account receipt and account information.
- Annual interest notices and proof of payment or credit.
- Any correspondence about the deposit.
- Move-out inspection notes and photographs.
- Invoices, estimates, bills, or receipts supporting deductions.
- The sworn itemized damage statement, if deductions are made.
- Proof of the final refund and the date it was sent.
Massachusetts law also imposes record-retention requirements. Landlords should preserve the security-deposit records for the required period after the tenancy ends rather than discarding them as soon as the refund is issued.
Pay or credit the required interest each year
If a landlord holds a security deposit for one year or longer, the tenant is entitled to interest beginning with the first day of the tenancy. The statute generally provides for 5% annual interest or the lesser amount actually received from the bank where the deposit is held.
At the end of each year, the landlord should provide the required statement identifying the bank, deposit amount, account number, and interest due, together with the interest payment or the notice permitted by statute allowing the tenant to deduct the amount from rent.
Do not wait until move-out to think about interest. Annual compliance should be part of the landlord’s calendar system.
Inspect carefully before making any deduction
When a tenancy is ending, Massachusetts law permits certain inspections to determine whether there is damage that could support a security-deposit deduction. Landlords should compare the move-out condition against the move-in statement and photographs.
The key distinction is damage versus reasonable wear and tear. Security deposits are not a general renovation fund. Ordinary aging, routine scuffs, and conditions consistent with normal use are different from tenant-caused damage.
Before deducting, ask:
- Was this condition present at move-in?
- Was it ordinary wear and tear?
- Can I prove the tenant or someone under the tenant’s control caused it?
- Is the repair cost reasonable?
- Do I have written evidence supporting the amount?
Only make deductions the statute allows
Under G.L. c. 186, § 15B, deductions from a residential security deposit are limited. They can include qualifying unpaid rent or water charges, qualifying unpaid tax increases under a valid tax-escalator clause, and a reasonable amount necessary to repair tenant-caused damage beyond reasonable wear and tear.
A landlord should not deduct for unrelated expenses merely because the tenant owes money. For example, a landlord should not assume the security deposit can automatically be used for every lease charge, cleaning fee, administrative fee, or disputed expense.
If the landlord believes additional sums are owed that are not proper security-deposit deductions, those claims should be evaluated separately.
For damage deductions, the itemized statement must be detailed and sworn
If a landlord deducts for physical damage, Massachusetts law requires more than a simple list such as “wall damage — $500.” The landlord must provide an itemized list of the damages, sworn to under the pains and penalties of perjury, describing the damage and repairs in precise detail.
The landlord must also provide written evidence of the actual or estimated cost, such as estimates, bills, invoices, or receipts.
This is an area where casual paperwork creates unnecessary risk. The deduction package should be prepared carefully enough that someone unfamiliar with the unit can understand what was damaged, why it was the tenant’s responsibility, what repair is necessary, and how the amount was calculated.
Return the balance within 30 days after the tenancy ends
The landlord must return the security deposit, or the balance after lawful deductions, within 30 days after the tenancy ends. The statutory deadline should be calendared immediately when the termination date is known.
Do not let contractor scheduling delay the accounting. The statute permits written evidence such as estimates as well as completed invoices in appropriate circumstances, so landlords should begin gathering documentation promptly.
Send the refund and itemization in a trackable manner and keep proof of transmission. Confirm the tenant’s forwarding address where possible.
Failure to comply can cost more than the deposit
Massachusetts security-deposit law contains significant remedies. Certain violations can cause a landlord to forfeit the right to retain any portion of the security deposit. Certain failures can also result in an award of three times the amount of the deposit or balance to which the tenant is entitled, together with interest, court costs, and reasonable attorney’s fees.
That is why landlords should not view § 15B as a technicality to fix only when a tenant complains. Compliance should be built into the property-management process from the first payment.
Be careful when property ownership changes
Security deposits create obligations not only for the original landlord but also in connection with transfers of the property. A seller should not simply hand over a closing file and assume the deposit issue is finished.
The transfer of the deposit and related records should be handled in accordance with the statute, with clear documentation showing what was transferred and when. Buyers should also confirm the deposits associated with every occupied unit rather than relying only on a rent roll.
Security-deposit compliance should be part of due diligence in any sale of residential rental property.
Keep last month’s rent separate from the security-deposit analysis
Last month’s rent and a security deposit are different forms of prepayment and are governed by different provisions. They have different receipts, interest obligations, and permitted uses.
Do not label the same payment both ways. Do not assume a security deposit can automatically be converted into last month’s rent. Massachusetts guidance explains that these prepayments generally cannot simply be transferred to a different use without agreement.
A practical landlord checklist
- Confirm the security deposit does not exceed one month’s rent.
- Give the signed receipt when the deposit is received.
- Provide the statutory statement of condition on time.
- Photograph and document the unit’s initial condition.
- Place the deposit in the proper separate Massachusetts interest-bearing account.
- Give the tenant the bank and account information within 30 days.
- Calendar annual interest obligations.
- Maintain the required records throughout the tenancy and afterward.
- Inspect and document the unit at move-out.
- Deduct only items permitted by § 15B.
- For damage, prepare a precise sworn itemization and supporting cost documents.
- Return the balance within 30 days after the tenancy ends.
- Keep proof of everything that was sent.
When should a landlord call a lawyer?
Legal review is especially worthwhile before withholding a substantial deposit, when the tenant disputes responsibility for damage, when the paperwork was not handled correctly at move-in, when ownership of the property is changing, or when a demand letter threatens multiple damages or a consumer-protection claim.
A landlord should also seek advice before attempting to “fix” an earlier statutory violation by creating documents after the fact. Accurate records and candid legal advice are safer than paperwork that does not reflect what actually occurred.
If you own or manage Massachusetts residential rental property and have a security-deposit issue, contact Muggeo & Associates to discuss the specific tenancy and the available options.
General legal information only. This article does not create an attorney-client relationship and is not legal advice for any particular tenancy.
Sources and currency
Checked October 16, 2026. Primary and official guidance includes G.L. c. 186, § 15B, the Massachusetts Court System’s security-deposit law page, the Executive Office of Housing and Livable Communities’ security deposits and last month’s rent guidance, and the Massachusetts Attorney General’s landlord-tenant guide. Section 15B was amended effective August 1, 2025; landlords should confirm any later statutory or regulatory changes when applying these rules to a current tenancy.
