Acceleration Clause Explained: Six Versions to Check Before You Sign
This page is general information, not legal advice.
An acceleration clause lets one side demand everything still owed under a contract, all at once, if a certain event happens. Instead of paying a loan, lease or payment plan in monthly installments, you could suddenly owe the entire remaining balance. These clauses appear in personal loans, promissory notes, mortgages, car finance, equipment leases, commercial and residential leases, settlement agreements and installment plans with service providers. They are common and not unfair in themselves: a lender or landlord wants a way out if you stop paying. The risk lies in how easily the clause can be triggered, and what gets added on top. This page covers six versions to watch for. For each one you get an illustrative example, why it matters, and wording you can propose. How these clauses are read and enforced varies by jurisdiction, and consumer loans and residential leases are often subject to extra rules.
The example clauses below are illustrative. They are not taken from any real company's contract.
1. Acceleration on any default, however small
A typical clause might read: "Upon the occurrence of any Event of Default, including any failure to pay any amount when due, the entire unpaid balance shall become immediately due and payable."
Why it works against you
A single payment that arrives one day late, or a bank transfer that fails, could make the whole balance due. Few people can pay off a loan or a year of rent overnight, so the clause gives the other side a lot of leverage the moment anything slips. Even if it's never used, it can be held over you in any later dispute.
What to ask for instead
Sample wording to propose: "Lender may accelerate only if a payment remains unpaid for more than [30] days after its due date, or if Borrower misses [two] or more scheduled payments in any 12-month period."
2. Automatic acceleration with no notice or chance to fix it
A typical clause might read: "Acceleration shall occur automatically, without notice, demand or presentment, all of which Borrower expressly waives."
Why it works against you
Without notice, you might not know you're in default until collection starts. Without a cure period, you have no chance to fix an honest mistake. Waivers of notice and demand are standard in some lending forms, but they remove the step that usually lets problems get resolved without a fight. Also check the contract's notice section to see how and where a default notice would be sent, so that it actually reaches you.
What to ask for instead
Sample wording to propose: "Before accelerating, Lender will give Borrower written notice describing the default. Borrower will have [15] days after receiving the notice to cure it, and if cured, no acceleration will occur."
3. Triggers that have nothing to do with payment
A typical clause might read: "Lender may declare all sums immediately due if Lender, in its sole judgment, deems itself insecure or believes that Borrower's financial condition has materially changed."
Why it works against you
This is sometimes called an "insecurity" or "material adverse change" trigger. You can be paying on time and still face acceleration because the other side feels nervous, for example after you change jobs, take on other debt or your business has a slow quarter. "Sole judgment" makes it hard to challenge. Some jurisdictions require such judgments to be made in good faith, but proving bad faith is difficult.
What to ask for instead
Sample wording to propose: "Events of Default are limited to (a) non-payment beyond the cure period, (b) a material false statement in Borrower's application, and (c) Borrower's bankruptcy. No other event permits acceleration."
4. Cross-default with other contracts
A typical clause might read: "A default by Borrower under any other agreement with Lender or any third party shall constitute an Event of Default under this Agreement."
Why it works against you
Cross-default links your contracts together. A dispute over a phone bill, a late credit card payment or a disagreement with a different supplier could make this balance due as well. One problem can spread into several at once. Cross-default terms often appear alongside personal guarantee clauses, which can extend the damage to your personal assets.
What to ask for instead
Sample wording to propose: "A default under another agreement is an Event of Default only if it is with Lender, involves an amount over [amount], and has resulted in that other debt being accelerated."
5. Rent acceleration in a lease
A typical clause might read: "If Tenant defaults, all rent for the remainder of the Term shall become immediately due, without any obligation on Landlord to re-let the Premises or credit Tenant for rent received from a new tenant."
Why it works against you
In a lease, acceleration can mean owing rent for every remaining month, even if the landlord quickly finds a new tenant and collects rent twice. Whether a landlord must try to re-let (often called a duty to mitigate) and whether rent acceleration is enforceable at all vary a lot by jurisdiction and by whether the lease is residential or commercial. Compare it with early termination fee clauses, which set a fixed price for leaving early. See lease agreement red flags and commercial lease red flags.
What to ask for instead
Sample wording to propose: "If Tenant defaults, Landlord will use reasonable efforts to re-let the Premises. Any accelerated rent will be reduced by rent Landlord receives from a replacement tenant and discounted to present value."
6. Acceleration plus default interest, fees and costs
A typical clause might read: "Upon acceleration, the entire balance shall bear interest at the Default Rate of [X]% per month, and Borrower shall pay all collection costs, attorneys' fees and a default fee of [Y]% of the accelerated amount."
Why it works against you
Once the full balance is due, every percentage applied to it gets bigger. A default rate, a flat default fee and open-ended collection costs can stack on top of each other quickly. Some jurisdictions cap interest rates or limit fees that act as a penalty, but the limits differ. See late payment fee clauses explained and liquidated damages clauses explained.
What to ask for instead
Sample wording to propose: "After acceleration, interest continues at the contract rate. Borrower will pay only reasonable, documented collection costs actually incurred, and no additional default fee applies."
Acceleration vs. related clauses
An acceleration clause is different from a due-on-sale clause in a mortgage, which makes the loan due if you sell or transfer the property, and from a demand note, where the lender can ask for repayment at any time for any reason. Some contracts contain more than one of these, so read the default section closely. It's also worth checking whether the clause lets the lender reverse acceleration if you catch up (sometimes called reinstatement), and whether partial payments after acceleration count.
Also worth a look
Look at clauses that let the other side change interest rates or fees later (see unilateral amendment clauses explained) and where disputes must be heard (see governing law and jurisdiction clauses explained). If you're signing a car finance or lease contract, see car lease agreement red flags.
Scan your own contract free
The default section of a lease or loan is easy to skim past and hard to undo after you sign. Upload your agreement to the ScanMyTerms lease agreement checker as a PDF, DOCX, TXT or MD file, photograph it (up to 30 pages), or paste the terms. In about a minute you get a list of clauses that work against you, with the risk level, the exact wording, why it hurts and how to change it. The free preview shows the risk count and the first two findings. The full report is $5 per document.
This page is general information, not legal advice. Lending, landlord-tenant and consumer protection rules vary by jurisdiction, so for decisions about a specific contract, talk to a qualified lawyer where you live.
Sources
- All clause examples on this page are illustrative and written for this guide. They are not quoted from any real company's contract.