Lease Acceleration Clause
in Your Lease
What it actually means, what Pennsylvania law says, what's specific to Philadelphia - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- Pennsylvania's Landlord and Tenant Act of 1951 says nothing about acceleration or mitigation, so the rule comes entirely from court decisions.
- The Pennsylvania Supreme Court held in Stonehedge Square that a landlord facing an abandoning tenant has no duty to mitigate.
- Your landlord has to choose: evict you, or chase rent for the rest of the term, not both.
- A Philadelphia owner without a valid rental license or Certificate of Rental Suitability can't collect rent for that whole period.
- If the unit gets re-rented, that new rent is credited against what you owe, so nobody collects twice.
Understanding the Lease Acceleration Clause
A lease acceleration clause says that the moment you break the lease, every remaining month comes due at once. Walk out of your Fishtown rowhouse in month four of twelve and the demand covers all eight months you won't be living there. Most Philadelphia leases carry some version of it.
Pennsylvania is one of the harder states to walk away from. There's no statute forcing your landlord to look for a replacement tenant, so the unit can sit empty while the bill keeps growing. Philadelphia's licensing rules are the counterweight, and they're stronger than most renters realize.
What renters assume
Renters assume a landlord has to at least try to re-rent the place before billing them for months of an empty apartment. It sounds like basic fairness, and in most states it's the law.
What is actually true
Pennsylvania's courts say no. A landlord whose tenant leaves in breach can let the unit sit and still pursue the remaining term, though a Philadelphia owner without a valid rental license can't collect anything.
Same paragraph in the lease, wildly different outcomes by state. Texas and New York make any waiver of the duty to re-rent void and Washington caps what a departing tenant can owe, while Pennsylvania gives you neither, which is exactly why the Philadelphia license question carries so much weight here.
Plain English Version
Think of a gym that won't cancel your membership after you move away. Most states make them try to resell your spot; Pennsylvania lets them leave it empty and keep sending the bill.
Rent Acceleration Clause Example - What the Wording Looks Like in Philadelphia, PA
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 three sentences quoted by the court. They are not the whole paragraph - a further sentence on late fees and interest on accelerated sums follows in the lease and is not set out below:
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.
“If any monthly installment”
Before arguing about what the paragraph does, check something simpler in Philadelphia: whether the owner may collect rent at all. Under Phila. Code § 9-3901(4)(e), an owner without a valid rental licence, or who failed to give you a Certificate of Rental Suitability, is denied the right to collect rent or to recover possession for the whole period of noncompliance. An installment that could not lawfully be collected in the first place is a thin foundation for accelerating the rest of the term on top of it.
“and remains unpaid”
Unpaid rent stays unpaid longer in Pennsylvania than in most of the states compared here, because nothing obliges the landlord to fill the unit. Stonehedge holds that a non-breaching landlord whose tenant abandons in breach has no duty to mitigate, and our Pennsylvania record puts the practical result plainly: the unit may sit idle while the full remaining term is charged. That rests on one 1998 decision, so read the current case law rather than treating the rule as fixed.
“Landlord shall file Notice of Partial Satisfaction”
This is a clause about reducing a judgment, and Pennsylvania has a rule about a bigger version of the same problem. Homart Development Co. v. Sgrenci, 662 A.2d 1092 (Pa. Super. 1995), forces an election of remedies: a landlord cannot eject the tenant and also hold that same tenant liable for rent accruing after the eviction. Possession and the full accelerated rent are not both available. So the date you were put out of the unit is worth pinning down precisely, because it is the line the rent stops crossing.
“to the extent of the third party rental agreement”
Here is a rule in our Pennsylvania record that runs the tenant's way, and it survives the absence of any mitigation duty. A landlord who does relet cannot collect twice: rent received from the replacement tenant is credited against what the departing tenant owes for the same period. So the question that decides the money is not whether the landlord had to relet, but whether they did - and if so, from what date and at what rent. The paragraph above happens to write that credit into the contract as well.
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.
Pennsylvania Law on Lease Acceleration Clause
- The Landlord and Tenant Act of 1951 (68 P.S. § 250.101 et seq.) is silent on rent acceleration and on any duty to mitigate, so the rule comes entirely from case law.
- Stonehedge Square Ltd. Partnership v. Movie Merchants, Inc., 715 A.2d 1082 (Pa. 1998), holds that a non-breaching landlord whose tenant abandons in breach of the lease has no duty to mitigate damages.
- Homart Development Co. v. Sgrenci, 662 A.2d 1092 (Pa. Super. 1995), forces an election of remedies: a landlord cannot eject the tenant and also hold that tenant liable for rent accruing after the eviction, so possession and full accelerated rent cannot both be taken.
- A landlord who does re-rent cannot collect twice; rent received from the replacement tenant is credited against what the departing tenant owes for the same period.
Verify the current text in your state's landlord-tenant statutes.
The Landlord and Tenant Act of 1951 is silent on rent acceleration and silent on any duty to mitigate, so everything here comes from case law rather than a statute you can look up. In Stonehedge Square Ltd. Partnership v. Movie Merchants, Inc., the Pennsylvania Supreme Court held that a non-breaching landlord whose tenant abandons has no duty to mitigate damages.
Compare that with Illinois, where 735 ILCS 5/9-213.1 demands reasonable mitigation statewide, or Washington, which caps tenant liability at the lesser of remaining rent or re-rental costs. Pennsylvania's counterweight is Homart Development Co. v. Sgrenci, which forces an election of remedies: a property manager can't eject you and also hold you liable for rent accruing after the eviction. Because this is judge-made law rather than a fixed code section, confirm the current Pennsylvania rule before you rely on it.
Pennsylvania Tenant Protections
Your landlord has to elect a remedy, so under Homart they can't evict you and also collect rent accruing after the eviction, meaning possession and the full accelerated balance don't both happen. If the unit does get re-rented, rent from the replacement tenant is credited against what you owe for those same months, so nobody recovers twice.
And in Philadelphia, an owner without a valid rental license, or who never gave you a Certificate of Rental Suitability, is denied the right to collect rent or recover possession for the entire noncompliance period.
What's Specific to Philadelphia
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.
Philadelphia beats state law where it counts. Under Phila. Code Section 9-3901(4)(e), an owner without a valid rental license, or who never handed you a Certificate of Rental Suitability, is denied the right to collect rent or recover possession for the whole noncompliance period. An unlicensed landlord can't enforce an acceleration clause at all.
That's no rare technicality in a city built on rowhouses and small individual owners. Check the license before you assume you owe a dollar, especially around Temple and Penn, where leases turn over every summer and the Certificate of Rental Suitability gets skipped more often than you'd think. These claims land in Philadelphia Municipal Court, where your landlord still has to prove the number.
Check it first. Without one, a Philadelphia owner is denied the right to collect rent for the entire noncompliance period.
You should have. Missing it triggers the same no-collection bar as an unlicensed unit under the city code.
Get it in writing. Pennsylvania won't force re-renting, so a written credit clause does the work courts here refuse to do.
Push back in writing. Under Homart, a landlord can't take possession and also collect rent accruing after the eviction.
Red Flags to Watch Out For
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No mention of a rental license
Nothing in your lease shows the owner is licensed. In Philadelphia that license is the difference between owing the balance and owing nothing for the noncompliance period.
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Eviction plus the full balance
They can't have both. Taking possession while charging rent that accrues after the eviction is exactly what Pennsylvania's Homart decision refuses to allow.
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Silence on re-renting credits
A lease that never mentions crediting a new tenant's rent leaves you on Pennsylvania's default, where nobody is required to re-rent your unit.
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A lump-sum demand with no math
A number in a letter isn't proof. Ask in writing for the re-rental date, the new rent, and the months actually vacant before paying anything.
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Language waiving your defenses
Some leases ask you to give up defenses or agree to a judgment in advance. Read that paragraph twice and get advice before signing anything like it.
Your Rights as a Philadelphia Tenant
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The license question comes first
Confirm the rental license and the Certificate of Rental Suitability before anything else. Without both, a Philadelphia owner is denied the right to collect rent or recover possession.
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They must pick one remedy
Under Homart your landlord can eject you or pursue rent for the remaining term, not both, so possession and the full accelerated balance never stack.
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No collecting the rent twice
If a replacement tenant moves in, that rent is credited against what you owe for the same months. Ask for the re-lease date in writing.
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The right to make them prove it
A demand letter is not a judgment. Your landlord still has to prove the damages in Philadelphia Municipal Court, and you can negotiate or defend the number.
What To Do - Step by Step
Find the acceleration paragraph
Search your lease for 'accelerate', 'entire balance', or 'liquidated damages'. That wording sets what they'll demand the day you hand back the keys.
Verify the rental license
Confirm the owner holds a current Philadelphia rental license and gave you a Certificate of Rental Suitability. A gap there is your strongest card.
Give written notice early
Email plus certified mail with your exact move-out date. Pennsylvania gives you no statutory exit, so the paper trail is most of the defense.
Offer a replacement tenant
Nobody here is required to look for one, so do it yourself. Send qualified names in writing and keep every reply, because a refused ready tenant matters later.
Return keys, document everything
Photograph every room and hand the keys over formally. A rent-ready unit removes the easiest excuse for leaving it empty for months.
Negotiate in writing, then defend
Most of these settle near the genuinely vacant months. If it reaches Philadelphia Municipal Court, make them prove the damages and raise the license issue.