Rent Payment Protections for Massachusetts Tenants

In Massachusetts, a landlord cannot charge a late fee or interest on rent until the rent is 30 days overdue, and a landlord who collects last month's rent must give you a receipt and pay you interest on it every year. Both rules come from General Laws chapter 186, section 15B, and a lease cannot waive them. State law sets no cap on how much rent can rise, and cities and towns cannot set one, because rent control has been banned statewide since 1994. What the law controls is timing: a tenant at will (a renter with no fixed lease term) must get written notice at least 30 days or one full rental period before an increase, whichever is longer, and rent under a lease stays the same until the lease ends unless the lease itself provides for an increase.

Late fees: none until rent is 30 days late

No lease or rental agreement can add interest or a penalty for late rent until 30 days after the rent was due. If your rent is due October 1, a late fee cannot apply before October 31, even if your lease sets one on the 5th. The Attorney General's guide lists a fee on rent less than 30 days late among the terms a Massachusetts lease must not contain, and the statute voids any lease clause that conflicts with it. Neither the statute nor the Attorney General's rules set a dollar limit for a fee charged after day 30, but the fee must be authorized by a valid written lease or rental agreement.

A landlord who charges the fee early also commits an unfair or deceptive practice under the Attorney General's landlord-tenant regulations. That gives you a claim under the state consumer protection law, chapter 93A:

• Demand letter first. At least 30 days before you sue, send the landlord a written demand that identifies you, describes the early fee, and states what it cost you. You can skip it if you raise the claim as a counterclaim, a claim you file back against the landlord in an eviction case.
• Settlement offers count. If the landlord makes a reasonable written settlement offer within 30 days and you turn it down, the court can limit your recovery to that offer.
• Damages and fees. The court awards your actual damages or $25, whichever is more, doubled or tripled if the landlord acted willfully or knowingly or refused your demand in bad faith, plus your reasonable attorney's fees and court costs.

The 30-day rule does not move your due date: once rent goes unpaid, the landlord can serve a 14-day notice to quit for nonpayment. You can stop that notice from ending your tenancy by paying:

• Tenant at will: the full rent due within 10 days after you receive the notice, if you have not received another nonpayment notice in the past 12 months. The notice must tell you about this right; if it does not, you have until the day your written answer is due in any eviction case.
• Written lease: all rent due, plus interest and court costs, by the day your written answer is due in the landlord's eviction case.

Massachusetts eviction protections explains the court process. To compare the 30-day rule with grace periods in other states, see rent grace periods and your rights.

Last month's rent: the receipt and yearly interest

Last month's rent is prepaid rent for your final month. It is one of only four payments a landlord can require at move-in, along with the first month's rent, a security deposit of up to one month's rent, and the cost of a new lock and key.

When you pay it, the landlord or agent must give you a receipt that shows the amount and date, states that the money is rent for your last month, names the person who took it (and the landlord, if an agent took it), describes the unit, says you are entitled to interest, and asks you to leave a forwarding address when you move.

The interest rules:

• Rate. 5% a year, or the lower rate the bank holding the money actually paid.
• Start and end. Interest runs from the first day of the tenancy, and none is owed for the final month the payment covers.
• Yearly payment. At the end of each year of the tenancy, the landlord must send a statement of the interest owed and either pay it or tell you to subtract it from your next rent.
• Subtracting it yourself. If 30 days pass after the year ends with neither the money nor that notice, you can take the interest off your next rent payment.
• Move-out. If the tenancy ends before an anniversary, all interest owed is due within 30 days. If the landlord misses that deadline and you sue, the court must award you three times the interest, plus court costs and attorney's fees.

Example: you prepaid $2,400 in last month's rent, and the bank holding it pays 1.5%. After the first year, the landlord owes you $2,400 x 0.015 = $36. If nothing arrives within 30 days, pay $36 less with your next rent and attach a note saying the deduction is the yearly interest on your last month's rent.

If the building is sold, the seller must credit your prepaid rent and its interest to the buyer, and the buyer must tell you in writing within 45 days that it has taken over that obligation. After you move in, a landlord cannot demand rent in advance beyond the current month. The legal aid manual says a landlord can ask for more last month's rent only when you agree to a new tenancy at a higher rent, and the new amount cannot exceed the new monthly rent. Last month's rent vs. security deposit explains how the two payments differ, and your security deposit rights in Massachusetts covers the deposit's bank account and 30-day return rule.

How much notice you get before a rent increase

Example: your rent is due on the 1st, and your landlord gives you an increase notice on October 10. November 1 is only 22 days away, so the earliest the new rent can start is December 1.

For a tenant at will, an increase works by ending the old tenancy and offering a new one at the higher rent, and state law lets one written notice do both. If you do not accept, the landlord still needs a court order to remove you; changing the locks or moving your belongings out is illegal. A lease can raise the rent mid-term only if it clearly states when an automatic increase applies, or through a valid clause, agreed to before the tenancy began, that makes you pay a share of a property tax increase.

An increase can also be illegal as retaliation. Under the state's anti-reprisal law, a rent increase notice that reaches you within six months after you report a code violation to the board of health, complain in writing to the landlord about one, take legal action to enforce housing laws, or join a tenants' union is presumed to be a reprisal. To defeat that presumption, the landlord must show by clear and convincing evidence that it had an independent reason and would have raised the rent the same way at the same time anyway. A landlord found to have retaliated owes you at least one and up to three months' rent, or your actual damages if higher, plus attorney's fees. How to handle a rent increase covers negotiating the amount.

Why Massachusetts has no rent control

Voters eliminated rent control in 1994, and the Massachusetts Rent Control Prohibition Act still bars cities and towns from imposing it. A landlord can set rent for a new tenancy or a renewal subject to proper notice, anti-retaliation rules, and any housing-assistance program restrictions. For Section 8 vouchers, the administering housing agency must approve the rent as reasonable under program rules before an increase can take effect.

The ban remains in force. A proposed ballot question to cap yearly rent increases statewide cannot appear on the November 2026 ballot: on June 23, 2026, the Supreme Judicial Court ruled that its exemption for religious housing made it a question about religion, which the state constitution keeps off the ballot.

What to do if your landlord breaks these rules

1. Write to the landlord. Name the rule (section 15B for an early late fee or unpaid interest), list the amount, and ask for a refund or a credit on your next rent. Keep a copy.
2. Subtract unpaid interest yourself once 30 days have passed after a tenancy anniversary with no payment and no notice, and include a note showing your math.
3. Send a 93A demand letter if an early late fee is not reversed, then wait 30 days before filing in the Housing Court, District Court, or Superior Court.
4. Contact the Attorney General's office. Its Consumer Advocacy and Response Division takes complaints online and through the consumer hotline at (617) 727-8400.
5. Keep proof of every payment. The Attorney General's guide says a landlord should give a signed receipt for any payment made in cash or by money order, showing the amount, the date, and what it was for. Rent payment rules for tenants covers due dates and receipt rules in other states.