The statute of limitations on invoices generally runs between two and ten years, depending on whether the underlying agreement was written, oral, or a sale of goods, and depending on which state’s law governs the contract. Sales of goods carry a uniform four-year deadline under the Uniform Commercial Code.1LII / Legal Information Institute. UCC 2-725 – Statute of Limitations in Contracts for Sale Once that window closes, a creditor loses the ability to sue, but the debt itself still exists and the creditor can keep asking for payment.
How Long You Have, by Type of Agreement
The deadline on an unpaid invoice depends almost entirely on how the deal was documented. States draw sharp lines between written contracts, oral agreements, and sales of goods, and the ranges differ meaningfully.
Written Contracts
Written contracts carry the longest deadlines. Across the states, limitation periods on written contracts run from three to ten years, with most falling between four and six. The signed document is reliable evidence of what the parties agreed to, which is why legislatures give creditors more time to pursue these claims.
Oral Agreements
Oral agreements get less time. The range runs from two years at the low end to ten years in a few states, with most jurisdictions landing between three and six. If your invoicing rests on verbal arrangements, the clock moves against you faster than it would with a signature on paper.
Sales of Goods Under the UCC
When the invoice is for goods, the UCC overrides state contract rules and imposes a uniform four-year deadline. The parties can shorten that period to as little as one year in their original written agreement, but they cannot stretch it beyond four.1LII / Legal Information Institute. UCC 2-725 – Statute of Limitations in Contracts for Sale This rule covers contracts for the sale of goods only. Service contracts, construction agreements, and other non-goods work fall back under each state’s general contract limitation periods.
Open Accounts
Plenty of business relationships involve ongoing billing without a fresh contract for each transaction. A supplier shipping monthly against a running tab, or a professional invoicing after each project, may be operating under what the law calls an open account. Some states apply different, sometimes shorter, limitation periods to these arrangements. Each individual invoice usually triggers its own clock, starting when that invoice came due rather than when the relationship began.
When the Clock Starts
For most invoices, the limitation period begins on the date payment was due and not received. If an invoice says Net 30 and goes out January 1, the clock starts January 31. When a contract calls for installment payments, each missed installment opens its own separate window.
Under the UCC, the clock on a goods sale starts when the breach occurs, even if the creditor doesn’t yet know about it.1LII / Legal Information Institute. UCC 2-725 – Statute of Limitations in Contracts for Sale The one exception is a warranty that explicitly covers future performance: for those, the period runs from when the breach was discovered or should have been discovered.
What Can Restart the Clock
Certain actions can wipe out the time already elapsed and give the creditor a fresh window.
A partial payment is the most common trigger. Even a small payment on an outstanding debt can restart the full limitation period from the date of that payment.2Consumer Financial Protection Bureau. Can Debt Collectors Collect a Debt Thats Several Years Old For debtors, this matters enormously. A token payment on an invoice that was almost dead can hand the creditor several more years to sue.
A written acknowledgment of the debt can also reset the clock in many states, though the requirements vary. Some states want a signed writing that clearly identifies the debt. Others accept something less formal, such as an email confirming a balance. Verbal acknowledgments alone are less likely to restart the period, but debtors should be careful about any communication that could be read as admitting the money is still owed.
Many states also pause the clock while the debtor is physically absent from the state, on the logic that the creditor shouldn’t lose time it couldn’t use. That rule has weakened as service of process has become easier across state lines, and some states have dropped it when the debtor can be reached by other means.
What Happens When the Deadline Passes
Once the statute of limitations expires, the invoice becomes “time-barred.” A court will refuse to enforce it if the debtor raises the expired deadline as a defense. But “can’t sue” is not the same as “can’t collect,” and the difference matters on both sides of the ledger.
The Debt Still Exists
A time-barred invoice is not forgiven. The debtor still technically owes the money. Creditors can keep sending letters and making calls asking for payment, as long as they comply with applicable debt collection laws. What they can’t do is file a lawsuit, and without a judgment, they can’t garnish wages or place liens.
The Defense Isn’t Automatic
This catches debtors off guard: the statute of limitations does not automatically kill a lawsuit. It’s an affirmative defense, which means the debtor has to raise it in their response to the complaint. Ignore the lawsuit, fail to answer, or answer without mentioning the expired deadline, and the court can enter a default judgment anyway. Showing up and asserting the defense is not optional.
Federal Rules Against Suing on Time-Barred Debt
Federal regulations specifically prohibit professional debt collectors from suing or threatening to sue on time-barred debts.3eCFR. 12 CFR 1006.26 – Collection of Time-Barred Debts The rule covers third-party collection agencies and debt buyers, not the original creditor. A threat of litigation on a debt the collector knows is past the deadline is itself a violation and can be reported to the Consumer Financial Protection Bureau.
Collectors can still ask for payment, and they still have to follow standard disclosure requirements, including identifying themselves as debt collectors in every communication. What they can’t do is wield the one threat that gives collection calls their real force.
The Credit Report Clock Is Separate
The lawsuit deadline and the time a debt stays on a credit report run on independent tracks. Under the Fair Credit Reporting Act, a collection account or charged-off debt can stay on a consumer’s credit report for seven years.4Office of the Law Revision Counsel. 15 USC 1681c – Requirements Relating to Information Contained in Consumer Reports That seven-year period starts 180 days after the original delinquency, not from the date the account went to collections and not from the date the statute of limitations expired.
A debt can fall off a credit report before the lawsuit window closes, or it can sit on the report long after the deadline to sue has run. Making a partial payment restarts the limitation period for lawsuits in most states, but it does not restart the seven-year credit reporting period. That date is locked to the original delinquency.
Tax Consequences When an Invoice Goes Uncollected
When an invoice becomes genuinely uncollectible, both sides may face tax consequences, and this is the piece business owners most often miss.
Creditors can sometimes deduct a worthless debt. The IRS imposes a key condition: you can only deduct an amount you previously reported as income.5Internal Revenue Service. Topic No. 453, Bad Debt Deduction For cash-basis taxpayers, including most sole proprietors and small businesses, that’s a hard rule. Income is reported when payment arrives, so an unpaid invoice was never counted as income and nothing can be written off. Accrual-basis taxpayers report income when earned and can deduct the loss when the debt becomes worthless. Business bad debts can be deducted in full when completely worthless or partially when some portion remains recoverable. Nonbusiness bad debts can only be deducted when entirely worthless and are treated as short-term capital losses.6Office of the Law Revision Counsel. 26 USC 166 – Bad Debts
Debtors can face the opposite problem. When a creditor formally cancels a debt of $600 or more, they file a Form 1099-C, and the IRS treats the canceled amount as taxable income to the debtor. Under IRS rules, the expiration of the lawsuit deadline counts as a cancellation event triggering a 1099-C only when the debtor actually raises the defense in court and wins. Letting the calendar run past the limitation period, without any court proceeding, does not automatically generate a 1099-C.7Internal Revenue Service. Instructions for Forms 1099-A and 1099-C Other events, such as the creditor formally discharging the debt or stopping all collection activity, can trigger the filing on their own.
What to Do Before the Deadline Hits
If you are owed money and the statute of limitations is approaching, the most important step is to file suit before the window closes. Once it shuts, no amount of demand letters will bring back the right to legal enforcement. If the amount doesn’t justify an attorney, small claims court handles smaller invoices in most jurisdictions, with filing fees that generally stay under a few hundred dollars.
If litigation isn’t practical, a written acknowledgment of the debt or a partial payment from the debtor before the deadline can restart the clock. Be transparent about what you are doing. Courts and regulators take a dim view of creditors who maneuver debtors into restarting a limitation period without understanding the consequences.
If you are the one who owes, know the dates. Track when the original delinquency occurred, confirm which state’s law governs the contract, and never make a payment on an old debt without first checking whether that payment will restart the statute of limitations in your state. A dead claim and a live one can be separated by a single ill-advised check.