Lease Acceleration Clause
in Your Lease
What it actually means, what Massachusetts law says, what's specific to Boston - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- Our Massachusetts record finds no rent-acceleration section and no duty-to-mitigate provision in the sections of Chapter 186 it checked.
- That leaves the question to decided cases, and our record names none, so this page states no rule on whether the clause holds up.
- 940 CMR 3.17(6)(c) makes it unfair or deceptive to retain, as damages for your breach, more than the law entitles the landlord to.
- 940 CMR 3.17(6)(d) bars charging rent for periods you were not obligated to occupy and did not occupy, unless otherwise agreed in writing.
- Those rules issue under c. 93A, so a violation is actionable under § 9 for actual damages or $25, whichever is greater, plus fees.
Understanding the Lease Acceleration Clause
A lease acceleration clause says that the day you leave early, every unexpired month of rent comes due at once. On a South End two-bedroom with seven months left, that paragraph turns a move into a five-figure demand letter.
Say the hard part first. Massachusetts does not answer this one in a statute, so a Boston renter holding an acceleration demand needs advice on their own facts rather than a rule read off a page - and any page that hands you a confident yes or no is telling you more than the law here does.
What renters assume
Renters read the acceleration paragraph, assume a state law somewhere either blesses it or kills it, and go looking for the section number that settles their case.
What is actually true
In Massachusetts there isn't one to find. Our record turns up no acceleration statute and no mitigation statute, and it names no decided case, so what the clause is worth against you is a fact question - not a lookup.
Look at what the chart is actually made of: labels, not numbers. Not one of the sixteen rows carries a figure, because no state on it reduces the duty to re-rent to a dollar amount or a day count.
Eight of those labels start with 'mandatory' in some form - Texas, California, New York, Illinois, Washington, Arizona, Tennessee and Oregon all point at a section you can open. Massachusetts sits in the small group that points somewhere else instead, next to Colorado, where the label says the answer is not in the code, while Florida, Pennsylvania and Georgia read as no duty rather than no statute. Those are different answers, and Massachusetts gives you the second kind.
Plain English Version
Imagine asking whether a contract penalty is enforceable and being told the rulebook simply doesn't cover it. What Massachusetts does give you is a limit on the collecting: a landlord can't keep more than the law lets them keep, and can't bill you for months you were never on the hook to live there.
Rent Acceleration Clause Example - What the Wording Looks Like in Boston, MA
The sample clause below is real lease language - a court quoted it word for word, and then ruled on it. What the judge decided is at the bottom of this block.
Find the equivalent paragraph in your own lease and read the two side by side. The wording will differ; the moving parts rarely do.
The lease paragraph as the published opinion sets it out. It is an extract and not the whole of it: a further sentence, on late fees and interest charged on an accelerated amount, follows in the lease and is not printed here:
If any monthly installment under this agreement is not paid when due and remains unpaid after a date specified by a notice to Tenant, the entire principal rent amount owed for the full lease term shall at once become due and payable at the option of the Landlord and judgment may be had for all said amounts due. The foregoing provision shall not relieve the Landlord of its obligation to mitigate damages. In the event the rental premises is re-rented to another for full value prior to expiration of the lease term, Landlord shall file Notice of Partial Satisfaction of any judgment entered to the extent of the third party rental agreement.
[…]
Quoted from the published opinion in Summers v. Crestview Apartments, 2010 MT 164, 357 Mont. 123, 236 P.3d 586 (No. DA 09-0489). Judicial opinions are not subject to copyright; the lease language is reproduced in limited part for commentary under 17 U.S.C. § 107.
“monthly installment under this agreement”
This paragraph works out of the agreement itself, and here that is nearly the whole of it. With no acceleration section and no mitigation section in the c. 186 section list our Massachusetts record checked, the written limits run through the Attorney General's consumer-protection regulation and the rest through case law. Most of the states set beside Massachusetts on this page answer the same question with a statute a renter can look up. A Boston renter facing an acceleration demand needs advice on their own lease and dates, not a rule off a page.
“the entire principal rent amount owed”
This is the figure the Attorney General's regulation is aimed at. 940 CMR 3.17(6)(c) makes it an unfair or deceptive practice to retain as damages for a tenant's breach of lease any amount which exceeds the damages to which he is entitled under the law. The quantity it points at is whatever the law entitles the landlord to, which after a lease break is the case-law question again: a ceiling whose height is fixed outside the text setting it. Read the regulation as published today.
“judgment may be had for all said amounts”
The endpoint here is a court order for the whole sum, and Massachusetts puts something on the tenant's side of that courtroom. The Attorney General's landlord-tenant regulations issue under M.G.L. c. 93A, § 2(c), so a violation is actionable by the tenant under c. 93A, § 9: actual damages or twenty-five dollars, whichever is greater, rising to up to three but not less than two times that amount for a willful or knowing violation, plus reasonable attorney's fees and costs. The multiplier is not automatic; willful or knowing is a finding somebody has to make.
“re-rented to another for full value”
Months when a replacement tenant is in the unit are months you did not occupy, and Massachusetts has a rule written for that description. 940 CMR 3.17(6)(d) makes it an unfair or deceptive practice to require payment for rent for periods during which the tenant was not obligated to occupy and did not in fact occupy the dwelling unit. Then read the qualifier it ends on, which is the caveat: unless otherwise agreed to in writing. Whether the lease you signed is that writing is a question about your own document and dates.
The Montana Supreme Court struck this paragraph down, and its conclusion is one sentence: “Thus, we conclude that the accelerated rent provision is unconscionable and therefore unenforceable.” The tenants had moved out of their apartment on October 13, 2006, and Crestview answered with a Statement of Deductions from the Security Deposit charging rent through the end of the lease in June - $6,505.75 billed against a $2,170 deposit. Two reasons carried the court. Acceleration undermines the landlord's duty to mitigate and reduces the incentive to re-rent promptly, because a landlord already holding a judgment for the whole term has little reason to fill the unit. And Crestview drafted the lease while these tenants had no meaningful choice and no opportunity to negotiate any of it. The case was reversed and remanded, and two justices wrote separately - their objection being that the majority had gone as far as treating acceleration clauses as unenforceable in themselves. So read the holding narrowly, as the majority wrote it: this provision, in this residential lease, unconscionable and unenforceable. It is a Montana decision and it binds no other state's courts. What travels is the reasoning, and the reasoning is about mitigation - which is exactly the question the statute in your own city's decode answers.
One court, one lease, one state. That answer is not automatically yours, and your lease may be worded to land differently. Use this to know what to look for and what to ask - your state's tenant hotline or a local tenant attorney can answer it for your document.
Massachusetts Law on Lease Acceleration Clause
- Chapter 186 of the General Laws, which governs Massachusetts tenancies, carries no section on rent acceleration and no duty-to-mitigate provision, so this question is answered by case law rather than by statute.
- 940 CMR 3.17(6)(c), the Attorney General's landlord-tenant regulation, makes it an unfair or deceptive practice to 'retain as damages for a tenant's breach of lease, of the failure of a prospective tenant to enter into a written rental agreement after signing a rental application, any amount which exceeds the damages to which he is entitled under the law.'
- 940 CMR 3.17(6)(d) separately bars requiring 'payment for rent for periods during which the tenant was not obligated to occupy and did not in fact occupy the dwelling unit unless otherwise agreed to in writing.'
- Those regulations issue under M.G.L. c. 93A, § 2(c), so a violation is actionable under c. 93A, § 9, where recovery is actual damages or twenty-five dollars, whichever is greater, up to three but not less than two times that amount for a willful or knowing violation, plus reasonable attorney's fees and costs; and M.G.L. c. 186, § 20 implies a reciprocal attorney's-fee covenant in any residential lease that gives the landlord fees, with any waiver void as against public policy.
940 CMR 3.17(6) - statutes change; verify the current text for your situation.
Start with what is not there. Our Massachusetts record finds no rent-acceleration section and no duty-to-mitigate provision in the sections of Chapter 186 that it checked, which is why this page names no statute for the enforceability question and no case either. That is the finding, not a hedge bolted onto one.
What the record does carry is a ceiling on collection. 940 CMR 3.17(6)(c), the Attorney General's landlord-tenant regulation, makes it an unfair or deceptive practice to retain as damages for a tenant's breach of lease any amount exceeding the damages the landlord is entitled to under the law. 940 CMR 3.17(6)(d) separately bars requiring payment of rent for periods during which the tenant was not obligated to occupy and did not in fact occupy the unit, unless otherwise agreed in writing.
Those regulations issue under M.G.L. c. 93A, § 2(c), which matters because it puts a remedy behind them. Under c. 93A, § 9 recovery is actual damages or $25, whichever is greater, up to three but not less than two times that amount for a willful or knowing violation, plus reasonable attorney's fees and costs - and M.G.L. c. 186, § 20 implies a reciprocal attorney's-fee covenant into any residential lease that gives the landlord fees, with any waiver of it void as against public policy.
Massachusetts Tenant Protections
The strongest thing you have in Massachusetts is not a cap on the clause but a limit on the collecting. Under 940 CMR 3.17(6)(c) a landlord commits an unfair or deceptive practice by retaining more than the damages the law entitles them to, and under 3.17(6)(d) by requiring rent for periods you were not obligated to occupy and did not occupy, absent a written agreement otherwise. Because those rules sit under c.
93A, a violation carries § 9 remedies - actual damages or $25, whichever is greater, up to three and not less than two times for a willful or knowing violation, plus fees and costs. And if your lease hands the landlord attorney's fees, M.G.L. c. 186, § 20 implies the same covenant back to you and voids any waiver.
What's Specific to Boston
Figures are the state rule, or the stronger city ordinance where one exists. Verify the current law for your own situation before relying on it.
Our record finds no Boston ordinance on rent acceleration or on any duty to re-rent, so the Attorney General's regulation and Massachusetts case law are what control, whether you're leaving a triple-decker in Dorchester or a new build in the Seaport.
The city rule renters most often reach for is a different one. Boston's landlord ordinance, CBC 9-1.3, requires every rental unit to be registered by July 1 each year and inspected at least once every five years, with a penalty of $300 a month for failing to register. That is a registration duty owed to the city, not a rule about what a departing tenant owes, so it is worth knowing and worth not confusing with this.
Good sign. 940 CMR 3.17(6)(c) limits a landlord to the damages the law entitles them to, so the math is the argument.
Ask, in writing, what law entitles them to that figure. Retaining more than the law allows is unfair or deceptive under 940 CMR 3.17(6)(c).
Flag it. 940 CMR 3.17(6)(d) bars rent for periods you were not obligated to occupy and did not occupy, absent written agreement.
M.G.L. c. 186, § 20 implies the same covenant back to you in a residential lease, and any waiver of it is void as against public policy.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- 940 CMR 3.17(6), read on law.cornell.edu. Massachusetts publishes the official text at malegislature.gov.
Red Flags to Watch Out For
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All remaining rent, demanded at once
The letter bills every unexpired month the day you hand back keys. Ask what law entitles them to that sum, because 940 CMR 3.17(6)(c) caps retention at exactly that.
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A lump sum with no math
A number in a letter is not a judgment. Ask in writing for the vacancy dates, any re-rental date and the new rent before treating a cent of it as owed.
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Rent billed for occupied months
You are charged for a period a replacement tenant was already paying for. 940 CMR 3.17(6)(d) speaks directly to rent for periods you did not occupy.
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Acceleration stacked on a break fee
You are billed the whole balance and a separate lease-break charge. Ask which is credited against the other before you agree to either.
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A one-way attorney's-fee clause
The lease gives the landlord fees and says nothing about yours. M.G.L. c. 186, § 20 implies the covenant reciprocally and voids a waiver of it.
Your Rights as a Boston Tenant
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A ceiling on what they keep
940 CMR 3.17(6)(c) makes it unfair or deceptive to retain, as damages for your breach, any amount exceeding what the law entitles the landlord to.
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Not rent for months you never owed
940 CMR 3.17(6)(d) bars requiring rent for periods you were not obligated to occupy and did not in fact occupy, unless otherwise agreed in writing.
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c. 93A puts a remedy behind it
Under c. 93A, § 9, recovery is actual damages or $25, whichever is greater, up to three and not less than two times for a willful violation, plus fees.
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Fees run in both directions
M.G.L. c. 186, § 20 implies a reciprocal attorney's-fee covenant into a residential lease that gives the landlord fees, and any waiver is void as against public policy.
What To Do - Step by Step
Find the acceleration paragraph
Search your lease for 'accelerate', 'all remaining rent', 'balance of the term' or 'liquidated damages'. That wording is the number your landlord will start from.
Give dated written notice
Email it and mail it, with the exact date you are out. A provable move-out date is what anchors every later argument about which months are genuinely vacant.
Return keys and document the unit
Photograph every room and hand the keys back formally. A rent-ready unit removes the easiest explanation for why it sat empty.
Track the relisting weekly
Check Zillow, Apartments.com and the building's own site, and save the date and asking price. A re-rental date is what 940 CMR 3.17(6)(d) turns on.
Demand an itemized statement
Ask in writing for the vacancy months, the re-rental date and the new rent, and for what law entitles them to the figure they are keeping.
Get advice on your own facts
Because no statute answers this one, talk to a Massachusetts legal aid office or a landlord-tenant attorney before you sign a repayment plan or pay a demand.