Massachusetts Landlord-Tenant Law 2026: The Complete Handbook

Tenby is an AI-powered property management platform for independent landlords managing 1-50 rental units. Tenby's compliance engine is loaded with Massachusetts-specific rules — security deposit deadlines, interest requirements, late fee limits, and eviction notice requirements — automatically enforced for every Massachusetts property.

Massachusetts landlord-tenant law lives primarily in Chapter 186 of the Massachusetts General Laws, and its security deposit statute — MGL ch. 186 § 15B — is one of the strictest in the country. Getting § 15B wrong is the most common (and most expensive) mistake Massachusetts landlords make. Here's everything you need to know.

Security deposits in Massachusetts

Key details:

• The security deposit is capped at one month's rent — full stop
• The deposit must be held in escrow, separate from the landlord's own funds
• You must pay the tenant 5% annual interest (or the actual rate earned at the bank)
• Return the deposit or an itemized statement of deductions within 30 days after the tenant vacates
• No separate pet deposit — you cannot layer extra deposits on top of the one-month cap
• Application fees are prohibited — Massachusetts caps application fees at $0 under MGL ch. 186 § 15B; you cannot charge prospective tenants to apply

Massachusetts courts take § 15B violations seriously. If you can't document escrow, interest, and itemization perfectly, don't take a deposit at all — many small Massachusetts landlords make exactly that choice.

> Check your deposit: Use our free Massachusetts security deposit calculator to verify your deposit amount, interest, and return deadline are compliant.

Eviction process in Massachusetts

Massachusetts evictions follow a formal court process. Self-help evictions (changing locks, removing belongings, shutting off utilities) are illegal.

Step 1: Serve proper notice

Right to cure: Massachusetts tenants have a statutory right to cure nonpayment (MGL ch. 186 § 11) — paying what's owed within the statutory window stops the eviction for nonpayment.

Step 2: File the eviction case

If the tenant neither cures nor vacates, file an eviction action in the court with jurisdiction over the property.

Step 3: Court hearing

Both parties present their case. Massachusetts courts expect meticulous documentation — bring the lease, the notice with proof of service, the rent ledger, and your deposit records (deposit violations frequently surface as counterclaims in eviction cases).

Step 4: Judgment and execution

If the court rules for the landlord, an execution issues and a levying officer carries it out if the tenant still refuses to leave.

Late fees in Massachusetts

> Calculate your late fee: Use our free Massachusetts late fee calculator to check if your proposed fee is compliant with Massachusetts law. Also try our prorated rent calculator for move-in/move-out calculations and rent estimate tool to see if your rent is at market rate.

Massachusetts has the longest late fee waiting period in the country: no late fee may be imposed until rent is 30 days overdue (MGL c. 186 § 15B(1)(c)). After that, there is no statutory dollar cap, but the fee is judged on reasonableness — courts generally accept fees up to about 5% of monthly rent, and higher fees risk being struck down as unenforceable penalties. On $2,000 rent, keep the fee around $100 or less, and never charge it before day 31.

Landlord entry in Massachusetts

Give tenants at least 24 hours' notice before non-emergency entry, and spell out the entry procedure in your lease.

Required disclosures in Massachusetts

Massachusetts landlords must handle the following:

1. Lead paint compliance — Massachusetts requires compliance with its lead paint laws, including providing inspection reports, for homes built before 1978 (MA GL c. 111 § 197A)
2. Federal lead paint disclosure — disclose known lead-based paint hazards and provide the EPA "Protect Your Family From Lead in Your Home" pamphlet for pre-1978 properties (federal requirement)

Massachusetts's lead paint regime goes beyond the federal baseline — pre-1978 properties need their inspection documentation in order before the lease is signed.

Rent increase rules in Massachusetts

• No rent control — Massachusetts does not currently have rent control
• For month-to-month (tenancy-at-will) situations, the 30-day termination notice (MGL ch. 186 § 12) effectively sets the notice floor for rent increases
• Cannot raise rent during a fixed-term lease unless the lease includes a rent increase clause
• Source of income is protected (Mass. Gen. Laws ch. 151B § 4) — you cannot reject or treat applicants differently for using vouchers or other lawful income sources

Maintenance obligations

Landlord must:

• Maintain the property in habitable condition
• Comply with applicable building, sanitary, and housing codes
• Keep essential systems (plumbing, heating, electrical) in working order
• Keep common areas safe and clean
• Make repairs within a reasonable time after notice — Tenby tracks a 14-day repair window for Massachusetts properties

Tenant must:

• Keep the unit clean and sanitary
• Use fixtures, appliances, and systems reasonably
• Not damage or destroy the premises
• Notify the landlord of needed repairs promptly
• Allow reasonable access for necessary repairs (with proper notice)

Tenant rights in Massachusetts

Tenants in Massachusetts have the right to:

• Habitable housing — the landlord must maintain the premises fit for habitation
• Rent withholding — Massachusetts law permits withholding rent for serious violations the landlord fails to fix (Mass. Gen. Laws ch. 239 § 8A)
• Repair and deduct — tenants may make certain necessary repairs and deduct the cost when the landlord fails to act (Mass. Gen. Laws ch. 111 § 127L)
• Right to cure nonpayment — paying within the 14-day notice window defeats a nonpayment eviction (MGL ch. 186 § 11)
• Deposit protections — 1-month cap, escrow, 5% interest, itemization, and the 30-day return deadline (MGL ch. 186 § 15B)
• No application fees — landlords may not charge tenants to apply (MGL ch. 186 § 15B)
• Source of income protection — voucher discrimination is prohibited (Mass. Gen. Laws ch. 151B § 4)
• Domestic violence protections — under federal VAWA, tenants in certain federally subsidized housing have additional protections

How Tenby helps Massachusetts landlords

Tenby's compliance engine handles Massachusetts-specific requirements automatically:

• 1-month deposit cap enforced at lease creation — over-collection is blocked before it happens
• 5% annual interest calculation and payment tracking on deposits
• Escrow documentation tracking for § 15B compliance
• 30-day deposit return tracking with countdown alerts
• 30-day late fee gate — Tenby will not generate a late fee before rent is 30 days overdue
• Late fee reasonableness guidance based on the 4-5% range courts accept
• $0 application fee enforcement in the screening flow
• 14-day notice to quit timeline guidance with cure-period tracking
• Lead paint compliance checklist for pre-1978 properties

The bottom line

Massachusetts is one of the most tenant-protective states in the country, and § 15B is where landlords get hurt. The key requirements to remember: deposit capped at one month and held in escrow with 5% interest, 30-day return deadline with itemization, no separate pet deposit, no application fees, no late fee until rent is 30 days overdue (and keep it near 5%), a 14-day notice to quit with a right to cure, and 30 days' notice for month-to-month changes. If you can't run the deposit rules perfectly, skip the deposit. Follow Chapter 186 to the letter, document everything, and you'll avoid the counterclaims that sink Massachusetts eviction cases.