A statute of limitations is the legal deadline for filing a lawsuit. It sets a fixed window, measured from the time a legal claim arises, after which a court will normally refuse to hear the case no matter how strong the underlying facts are. How long that window lasts depends on the type of claim and on the state or federal law that governs it, and it can range from about one year to a decade or more.
This post explains why limitations periods differ so widely, when the clock starts running (including the accrual and discovery rules), how a deadline can be paused through tolling, the difference between a statute of limitations and a statute of repose, and what happens if the deadline passes before a case is filed.
Why does the statute of limitations vary by claim and state?
It varies because each state legislature sets its own deadlines, and Congress sets separate deadlines for claims that arise under federal law. There is no single national clock. The same set of facts can carry very different deadlines depending on how the claim is framed and where it is filed.
Several factors drive the differences:
- Claim type matters most. Lawmakers assign different periods to personal injury, breach of contract, property damage, fraud, defamation, and other categories, based on how quickly evidence tends to fade and how soon a plaintiff should reasonably know they were harmed.
- State law controls most everyday disputes. Car accidents, slip-and-falls, contract fights, and similar cases are governed by the limitations statute of the relevant state, and those numbers differ from one state to the next.
- Federal claims run on their own schedule. Employment discrimination, many civil rights claims, securities claims, and other federal causes of action have deadlines set by federal statute, sometimes paired with a requirement to file an administrative charge first.
As a general guide, and with wide state-by-state variation, common ranges look roughly like this:
- Personal injury: often about one to six years, with two or three years being common.
- Written contracts: frequently longer than tort claims, often around three to six years and sometimes up to ten.
- Oral contracts: usually shorter than written contracts in the same state.
- Defamation: often among the shortest windows, commonly one to two years.
- Fraud: often measured from the point of discovery rather than the wrongful act.
These are illustrations of the framework, not a substitute for looking up the exact deadline that applies to a specific claim in a specific state.
When does the clock start? Accrual and the discovery rule
The clock usually starts when the claim "accrues," which most often means when the harm occurs or the wrongful act is complete. For a car accident, that is typically the date of the crash. For a broken contract, it is usually the date of the breach. From that starting point, the statutory number of years counts down to the filing deadline.
Many states soften that rule with a discovery rule for situations where the injury is not obvious right away. Under a discovery rule, the clock starts when the plaintiff discovers, or reasonably should have discovered, both the injury and its likely cause. This matters in cases like professional malpractice, latent product defects, exposure to a harmful substance, or fraud that was deliberately hidden, where months or years can pass before anyone realizes there is a claim.
The discovery rule does not extend deadlines indefinitely. It usually asks what a reasonable person would have known, so a plaintiff who ignored obvious warning signs may still find the clock started earlier than they hoped.
What is tolling, and can the filing deadline be paused?
Tolling is a legal pause that stops or delays the running of the limitations clock, effectively extending the deadline for a limited time. When a tolling condition applies, the days it covers do not count against the plaintiff.
Common tolling situations include:
- The injured person is a minor. Many states pause the clock until the person turns 18, so a child's claim may survive well past the ordinary window.
- Legal incapacity. A serious mental incapacity may toll the deadline until the person is able to manage their own affairs.
- The defendant left the state or hid. If the person being sued cannot be located or has fled the jurisdiction, some states pause the clock while they are unavailable.
- Fraudulent concealment. When a defendant actively hides the wrongdoing, the clock may be tolled until the plaintiff could reasonably have uncovered it.
- Agreed pauses. Parties sometimes sign a "tolling agreement" to freeze the deadline while they try to settle without filing suit.
Tolling rules are highly state-specific. A condition that pauses the clock in one state may have no effect, or a narrower effect, in another.
Statute of limitations vs. statute of repose
These two deadlines sound similar but work differently, and both can bar a case. A statute of limitations runs from when the claim accrues or is discovered, so tolling and the discovery rule can move it. A statute of repose sets an absolute outer limit measured from a fixed event, such as the date a product was sold or a building was substantially completed, regardless of when the injury happens or is discovered.
Because a statute of repose is tied to a fixed event rather than to the injury, it can cut off a claim before the plaintiff even knows they were harmed. These outer limits appear most often in product liability, construction defect, and some medical device contexts. A case can be within the ordinary limitations period and still be blocked by a statute of repose, which is why both deadlines need to be checked.
What happens if the statute of limitations expires?
If the deadline passes before the lawsuit is filed, the claim is usually "time-barred," and the court will typically dismiss it. In practical terms, the right to a remedy through the courts is lost even if the plaintiff would otherwise have won.
A few important details shape how this plays out:
- It is usually an affirmative defense. The court does not always raise the deadline on its own. The defendant generally has to plead the statute of limitations, and if they fail to raise it properly, they can waive it.
- The underlying obligation may still exist. With debts in particular, expiration of the limitations period generally bars a lawsuit to collect, but it does not necessarily erase the debt. The Consumer Financial Protection Bureau notes that a payment or written acknowledgment can sometimes restart the clock on old debt, so responses to collection attempts should be handled carefully.
- Filing on time is what counts. The deadline is generally about when the case is filed with the court, not when it is resolved, so filing before the cutoff preserves the claim even though the litigation continues afterward.
Do criminal cases have a statute of limitations too?
Yes. Criminal statutes of limitations set deadlines for the government to bring charges, and they vary by offense and jurisdiction. Less serious offenses tend to carry shorter periods, while the most serious felonies carry longer ones or none at all.
Many jurisdictions place no limitations period on certain grave crimes, such as murder, meaning charges can be brought years or decades later. Some states have also extended or removed deadlines for specific categories of offenses. Because these rules differ significantly from the civil deadlines above, a criminal question should be evaluated under the specific criminal code that applies.
What to do if you think you have a claim
Deadlines are easy to miss and hard to fix after the fact, so the practical steps are about protecting time.
- Act early and do not wait. Treat the possible deadline as sooner than you expect, since the exact date can be hard to pin down without legal review.
- Write down key dates. Note when the harm happened, when you first learned of it, and any related deadlines, because accrual and discovery can turn on these facts.
- Preserve evidence. Keep contracts, medical records, photos, messages, and receipts, since proof tends to disappear as time passes.
- Check for pre-suit requirements. Some claims, such as employment discrimination or claims against a government entity, require an administrative filing or formal notice within a short window that is separate from, and often shorter than, the lawsuit deadline.
- Get the exact deadline confirmed. Have a licensed attorney identify the specific statute, the accrual date, and any tolling or repose rules that apply to your situation.
One closing caveat: statutes of limitations vary considerably by state, by claim type, and between civil and criminal matters, and the details above describe the general framework rather than any single jurisdiction's rule. Confirm the deadline that applies to your specific facts with a licensed attorney in your state before relying on any number, because once the window closes it usually cannot be reopened.