Massachusetts Commercial Late Fees: Default Interest and Enforcement
Understand the rules for late fees in Massachusetts commercial leases, including default interest clauses, the lack of a statutory grace period, and remedies.
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This content is for general informational and educational purposes only. It does not constitute legal advice and should not be relied upon as such. Laws change frequently — always verify current regulations and consult a licensed attorney in your jurisdiction for advice specific to your situation. Landager is a property management platform, not a law firm.Information last verified: May 2026.
Since the establishment of its foundational legal framework on February 6, 1788, Massachusetts has maintained a clear distinction between residential and commercial tenancy protections. Specifically, the famous Massachusetts 30-day late fee grace period that applies to residential tenancies under MGL Ch. 186, §15B does NOT apply to commercial leases. Commercial late fees are governed entirely by the terms of the lease agreement.
Official Law Citation: Late fees in commercial leases are governed by general contract law and strictly by the negotiated terms of the commercial lease document. However, interest rates are subject to criminal usury limits under MGL Ch. 271, §49.
No Statutory Grace Period for Commercial
Because §15B's 30-day grace period is exclusive to residential tenancies, a commercial landlord can legally charge a late fee on the very first day rent is overdue, provided the lease authorizes it. If the lease says rent is due on the 1st and a $500 late fee accrues on the 2nd, that is generally enforceable.
Default Interest vs. Flat Fees
Massachusetts commercial leases typically employ one of two mechanisms for penalizing late payments:
1. Default Interest
The lease imposes daily interest on any unpaid rent from the due date until payment is received.
- Typical Rate: 10-18% per annum, or a percentage above the Prime Rate (e.g., "Prime + 5%").
- Criminal Usury Limit: Under MGL Ch. 271, §49, any interest rate (including default interest and fees recharacterized as interest) exceeding 20% per annum constitutes criminal usury unless the landlord provides prior notice to the Attorney General.
- Enforceability: While Massachusetts courts give more deference to commercial contracts than residential ones, an excessively high interest rate could be challenged as an unenforceable "penalty" if it does not reflect a reasonable estimate of actual damages.
2. Flat Late Fee
A fixed dollar amount (e.g., $500) or a percentage of the monthly rent (e.g., 5%) charged if rent is not received after a short grace period (e.g., 5 or 10 days).
- The fee must bear a reasonable relationship to the landlord's actual damages from the delayed payment (administrative costs, financing costs).
Combining Both Mechanisms
It is common to see both mechanisms in the same lease: a flat late fee triggered after a short grace period, plus default interest running from the due date on any amounts remaining unpaid after, e.g., 30 days.
Interaction with Eviction
A landlord can simultaneously charge late fees/interest and begin eviction proceedings. The two remedies are not mutually exclusive.
- If the lease is clear, lost rent, late fees, and default interest can all be pursued in the Summary Process action (governed by MGL Ch. 239) or a subsequent breach of contract suit.
Sources & Official References
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