Late Rent Fee Limits in Massachusetts
At a glance
| Governing law | M.G.L. c. 186, § 15B(1)(c) — no lease may impose interest or a penalty for unpaid rent until 30 days after rent was due. No statutory cap on the amount |
|---|---|
| Maximum late fee | No statutory dollar or percentage cap; the amount is a lease term. Massachusetts treats a late fee as enforceable only if it is a reasonable estimate of the landlord's loss (liquidated damages), not a punitive penalty (case law, not statute) |
| Grace period | Thirty days — a lease may not impose any interest or penalty for failure to pay rent 'until thirty days after such rent shall have been due' (§ 15B(1)(c)) |
| Lease or notice requirement | The charge is set by the 'lease or other rental agreement' (§ 15B(1)(c)); no statute requires a separate written notice beyond the lease term |
| One-time or recurring | Not specified beyond the 30-day bar; whether the fee is one-time or recurring is a lease matter, but nothing — interest or penalty — may be imposed during the first 30 days (§ 15B(1)(c)) |
| Calculated on | No statutory base; the lease sets what the fee is measured on |
| Related fees & carve-outs | The 30-day bar reaches both a late 'penalty' and 'interest' on unpaid rent (§ 15B(1)(c)); § 15B does not apply to a vacation or recreational tenancy of 100 days or less (§ 15B(9)) |
| If the fee is unlawful | A lease term imposing a late fee or interest within the first 30 days violates § 15B(1)(c) and is unenforceable to that extent; the section's treble-damages remedies apply to security-deposit violations, not the late-fee bar |
Requirements one by one
Thirty days before any late fee — the core rule
Massachusetts gives tenants the longest statutory grace period in the country. Under M.G.L. c. 186, § 15B(1)(c), "No lease or other rental agreement shall impose any interest or penalty for failure to pay rent until thirty days after such rent shall have been due." So no late fee is lawful until rent is a full 30 days overdue — and this holds no matter what the lease says, because a lease term that tries to charge sooner conflicts with the statute.
No dollar cap, but the fee must be reasonable
The statute sets the timing, not the amount. Massachusetts has no statutory dollar or percentage ceiling on a late fee, so the size is a lease term. Two practical limits still apply. First, the fee cannot be charged during the 30-day window. Second, Massachusetts courts treat a late fee as enforceable only if it is a reasonable estimate of the landlord's actual loss from the late payment — a charge that functions as a punitive penalty can be struck down. That reasonableness limit comes from court decisions and consumer-protection practice, not from a fixed statutory percentage.
Short vacation rentals are carved out
Section 15B(9) exempts "any lease, rental, occupancy or tenancy of one hundred days or less in duration which lease or rental is for a vacation or recreational purpose." For those short-term vacation rentals, the 30-day bar (and the rest of § 15B) does not apply.
What trips people up
"Thirty days" is not five days. Many leases copy a short grace period from another state or from habit. In Massachusetts the statutory floor is 30 days, and a fee charged on day 6, or day 15, is not collectible even if the lease says otherwise.
Interest is barred too, not just a flat "late fee." Section 15B(1)(c) blocks "any interest or penalty" during the first 30 days. A landlord cannot relabel a late charge as "interest on overdue rent" to get around the 30-day rule.
A number is not automatically lawful just because rent is 30 days late. Once the 30 days pass, a fee can be charged, but it still has to be reasonable. A fee far larger than the landlord's real loss can be challenged as an unenforceable penalty.
Common questions
Rent was due the 1st and I paid on the 20th. Can they charge a late fee? No. Massachusetts bars any late fee or interest until rent is 30 days overdue. On the 20th, fewer than 30 days have passed, so no fee is lawful.
Is there a maximum late fee in Massachusetts? Not by statute. The amount is set by the lease, but it must be a reasonable estimate of the landlord's loss; a fee that looks like a punitive penalty can be thrown out.
My lease charges 5% the day after rent is due. Is that enforceable? No. A lease term imposing a late fee before rent is 30 days overdue conflicts with § 15B(1)(c) and cannot be enforced for that early period.
Statutes and sources
- M.G.L. c. 186, § 15B(1)(c), (9) — no interest or penalty for unpaid rent
until 30 days after it was due; and the exemption for short vacation or
recreational tenancies.
(c) No lease or other rental agreement shall impose any interest or penalty for failure to pay rent until thirty days after such rent shall have been due. ... (9) The provisions of this section shall not apply to any lease, rental, occupancy or tenancy of one hundred days or less in duration which lease or rental is for a vacation or recreational purpose.
Official source: https://malegislature.gov/Laws/GeneralLaws/PartII/TitleI/Chapter186/Section15b (accessed 2026-07-20)
Source links
Every statute quoted above, linked, with the date we checked it.
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