MA S984

Limits move-in costs landlords can charge to first month's rent, last month's rent or security deposit (equal to one month's rent), and key/lock costs only

Caps late fees at $50 or 5% of monthly rent, whichever is less, with only one penalty allowed per late payment

Prohibits fees for holding over after lease expiration, lease renewals, substituting tenants, and increasing security deposits during occupancy

Bans mandatory fees beyond contract rent (amenity fees, internet fees, renter's insurance) unless tenant opts in with written agreement; prohibits requiring electronic payment systems

Violators must pay tenants triple damages plus court costs and attorney's fees; landlords cannot charge tenants attorney's fees unless they win a court judgment with fees approved as reasonable