Lease Acceleration Clause
in Your Lease
What it actually means, what Washington law says, what's specific to Seattle - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- Month-to-month renters owe rent for the 30 days after the landlord discovers the abandonment, or until the next rent due date.
- Fixed-term tenants owe the lesser of all remaining rent or the actual shortfall plus re-renting costs - never both.
- The statute caps liability, so an acceleration clause demanding every remaining month can't lawfully collect more than RCW 59.18.310 allows.
- Seattle adds nothing on acceleration - the just-cause eviction ordinance covers terminations, not what you owe after breaking a lease.
- Florida lets a landlord do nothing and bill you monthly; Washington requires reasonable re-rental effort the moment abandonment is known.
Understanding the Lease Acceleration Clause
A lease acceleration clause says that if you break your lease, every remaining month of rent comes due all at once. On a Seattle one-bedroom with eight months left, that reads like a five-figure bill arriving the day you hand back the keys.
Washington doesn't let that clause run unchecked. RCW 59.18.310 makes your landlord mitigate once they learn the unit has been abandoned, and it caps what you owe at the lesser of the remaining rent or the real shortfall plus re-renting costs.
What renters assume
Most renters read the acceleration paragraph and assume the whole balance is legally owed the second they move out. Plenty just pay it rather than fight.
What is actually true
In Washington that clause is capped by statute. RCW 59.18.310 holds you to the lesser of the remaining rent or the actual shortfall plus re-renting costs - and your landlord has to try to re-rent.
Washington sits at the protective end of this chart. Florida landlords may legally stand by and bill you as rent comes due, and Colorado has no statute at all - just case law - while RCW 59.18.310 both requires the effort and caps the bill at the lesser of two figures.
Plain English Version
Your lease says the whole tab is due the minute you walk out. Washington treats it more like a hotel that has to try to resell your room - you cover the nights it actually sat empty, not the nights someone else slept there.
Rent Acceleration Clause Example - What the Wording Looks Like in Seattle, WA
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.
This extract stops before the end of the paragraph. What follows it in the lease is a sentence about when late fees and interest may accrue on accelerated amounts, which is left 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.
“the entire principal rent amount”
This is the number the clause reaches for, and Washington puts a lid on it. Under RCW 59.18.310 the liability is the lesser of two figures: the entire rent remaining on the lease, or the rent accrued to date plus the shortfall against fair rental value plus the landlord's actual costs of re-renting. The lease's figure is only ever the first of those two, so it can be the answer but it can never be exceeded - and once the unit re-lets at a decent rent the second figure is usually much smaller.
“owed for the full lease term”
The full term is the measure only because this is a fixed-term lease. Washington writes a separate and far shorter rule for a month-to-month tenancy: the tenant owes rent for the 30 days following the landlord's discovery of the abandonment, or until the next rent due date, whichever comes first. The same abandonment can therefore produce a bill for one month or for the balance of a year, and which one depends on a fact about your tenancy rather than on anything in this paragraph.
“prior to expiration of the lease term”
The clock in Washington starts when the landlord learns of the abandonment, not at the end of the term, and from that moment a reasonable effort to mitigate is required. Re-renting is not free to you either: the statute's second figure includes the landlord's actual costs of re-renting alongside the fair-rental shortfall, so turnover and advertising costs can properly appear on the bill. What they cannot do is push the total past the entire remaining rent, because the statute takes the lesser of the two.
“to the extent of the third party rental agreement”
The lease credits you by whatever the replacement tenant agreed to pay. Washington's ceiling is measured differently: its second figure uses the shortfall against fair rental value, not simply the number on the new lease. That cuts both ways and is worth understanding before arguing it. A landlord who re-lets cheaply has not automatically transferred the whole gap to you, and a landlord who re-lets at a premium has not created a windfall for you either.
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.
Washington Law on Lease Acceleration Clause
- RCW 59.18.310 requires the landlord to make a reasonable effort to mitigate damages upon learning of the abandonment.
- For month-to-month tenancies the tenant owes rent for the 30 days following the landlord's discovery of abandonment or the next rent due date, whichever comes first.
- For longer terms, liability is the lesser of the entire remaining rent or accrued rent plus the fair-rental shortfall and actual re-renting costs.
- These statutory caps mean an acceleration clause cannot lawfully collect more than the statute allows.
RCW 59.18.310 - statutes change; verify the current text for your situation.
The trigger is abandonment, not your goodbye email. RCW 59.18.310 puts the duty on the landlord to make a reasonable effort to mitigate damages once they learn the unit has been abandoned, and what you owe is measured from there.
How much splits by tenancy type. Month-to-month renters owe rent for the 30 days after that discovery or until the next rent due date, whichever comes first; on a fixed term you owe the lesser of all remaining rent or accrued rent plus the fair-rental shortfall and actual re-renting costs. Illinois requires mitigation too under 735 ILCS 5/9-213.1, but sets no formula - reasonableness gets argued case by case.
Washington Tenant Protections
RCW 59.18.310 requires your landlord to make a reasonable effort to mitigate damages as soon as they learn the unit has been abandoned. If you were month-to-month, rent liability runs only for the 30 days after that discovery or until the next rent due date, whichever comes first. On a fixed term you owe the lesser of the entire remaining rent or accrued rent plus the fair-rental shortfall and actual re-renting costs, which caps what an acceleration clause can collect.
What's Specific to Seattle
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.
Seattle adds nothing to the acceleration rules. The city's just-cause eviction ordinance governs how a tenancy gets terminated, not what you owe after breaking one, so RCW 59.18.310 is the whole story from Ballard to Beacon Hill.
The local rental market does more work here than any ordinance. Vacancy in Seattle stays tight and units in Capitol Hill, Fremont, or South Lake Union tend to re-rent fast - which shrinks the shortfall a property manager can actually prove, so screenshot your old unit's new listing the day it reappears.
It should. RCW 59.18.310 requires a reasonable effort to re-rent once abandonment is known, and a lease that stays silent doesn't erase that duty.
Fair leases show the math. Washington holds you to the lesser of the remaining rent or the shortfall plus actual re-renting costs.
Red flag. A demand for every unexpired month ignores the statutory ceiling - you still owe only the lesser of the two figures.
Push back. A clause saying the landlord has no obligation to re-rent runs against RCW 59.18.310, so get it reviewed before you sign.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- RCW 59.18.310 on app.leg.wa.gov, Washington's own publication of its statutes.
Red Flags to Watch Out For
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Full remaining rent due immediately
The clause bills every unexpired month the day you leave. RCW 59.18.310 caps you at the lesser of remaining rent or the actual shortfall plus re-renting costs.
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No duty to re-rent
Language stating the landlord need not look for a new tenant. Washington's statute requires a reasonable effort to mitigate once abandonment is known.
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Acceleration stacked on re-letting fees
The lease takes all remaining rent and a separate re-letting charge. Washington counts actual re-renting costs inside the cap, not on top of it.
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Deposit kept plus accelerated rent
Your whole deposit is forfeited and the balance still comes due. Ask in writing which amounts are being credited against the lesser figure.
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Abandonment defined loosely
A clause treating a few days away as abandonment. Washington ties the duty to actual abandonment; Chicago's ordinance, by contrast, spells out 21 and 32-day tests.
Your Rights as a Seattle Tenant
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A landlord who must try
RCW 59.18.310 obligates a reasonable effort to mitigate damages once your landlord learns the unit is abandoned. Doing nothing isn't an option in Washington.
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Month-to-month capped at 30 days
If you were month-to-month, rent runs for the 30 days after discovery of the abandonment or until the next rent due date, whichever comes first.
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The lesser of two numbers
On a fixed term you owe the lesser of all remaining rent or accrued rent plus the fair-rental shortfall and actual re-renting costs.
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Re-renting costs must be real
The statute counts actual re-renting costs, so ask for invoices and listing records instead of accepting a round number on a move-out statement.
What To Do - Step by Step
Find the acceleration paragraph
Search your lease for 'accelerate', 'all remaining rent', or 'balance of the term'. Copy the exact wording - that's the number your landlord will start from.
Give written notice you're leaving
Email it and mail it, dated. RCW 59.18.310 turns on when the landlord learns of the abandonment, so put that date beyond argument.
Photograph and return the keys
Document the unit's condition and hand back keys on a date you can prove. Rent disputes and damage disputes get settled from the same paper trail.
Watch for the new listing
Check Zillow, Apartments.com, and the building's own site weekly. A relisting within days is evidence the shortfall is far smaller than the accelerated demand.
Demand an itemized statement
Ask in writing for the re-rental date, the new rent, and receipts for actual re-renting costs. You owe the lesser figure, not the invoice they mail.
Get free Washington tenant help
Call the Northwest Justice Project's CLEAR line or the Tenants Union of Washington State before paying anything or signing a repayment plan.