Last reviewed on April 27, 2026.
"Statute of limitations" is the deadline most people have heard of. "Statute of repose" is the one that surprises plaintiffs late in a case, when an otherwise-winning claim turns out to be barred by a clock that started running before the injury was discovered. The two are related but distinct, and confusing them is a mistake that ends cases before they really begin. This page explains how each one works, where they overlap, and the situations in which both apply.
The short answer
A statute of limitations sets the maximum time after a claim accrues — usually after an injury occurs or is discovered — to file a lawsuit. The clock starts when the cause of action is complete; the deadline is the latest moment you can sue.
A statute of repose sets the maximum time after a triggering act — like the completion of construction, the sale of a product, or the rendering of a professional service — beyond which a claim cannot be filed at all, regardless of when the injury happens or is discovered. The clock starts at the act, not at the injury.
Both clocks can apply to the same case. The earlier one wins.
Side-by-side
| Question | Statute of limitations | Statute of repose |
|---|---|---|
| Triggering event | The plaintiff's claim accrues — typically the date of injury or, where the discovery rule applies, the date the injury was or should have been discovered. | A defendant-side event: completion of a building, sale of a product, professional service rendered, security registered, etc. |
| Purpose | To require timely filing while evidence is fresh and witnesses are available. | To put a hard outer limit on a defendant's exposure, regardless of when the harm shows up. |
| Discovery rule | Often applies — the clock may not start until the plaintiff knew or should have known of the injury. | Generally does not apply — the clock starts on the triggering event whether or not the harm has surfaced. |
| Tolling | Often available for minors, fraudulent concealment, mental incapacity, the defendant's absence from the state, etc. | Typically far more limited; many courts hold that statutes of repose are not subject to ordinary tolling. |
| Where you'll see it | Almost every type of civil claim — contracts, torts, property, statutory causes of action. | Construction defect, products liability, medical malpractice (in some states), professional liability, securities (under federal law). |
Why the discovery rule matters
Statutes of limitations often include a discovery rule: the clock does not start until the plaintiff knew (or reasonably should have known) about the injury. This is the rule that makes long-tail cases — undiagnosed exposure to a contaminant, a misdiagnosed surgical error, a silent professional misstep — possible to file years after the underlying conduct.
Statutes of repose are designed to cut the discovery rule off. They sit on top of the limitations period and say: even if you only just discovered your injury, if more than X years have passed since the building was finished (or the product sold, or the service performed), you cannot sue at all. That's the part that surprises plaintiffs.
Worked example: a construction defect
Imagine a state where the statute of limitations for a property-damage claim is three years from discovery, and the statute of repose for construction defects is ten years from substantial completion of the project.
- Year 0. Construction is finished.
- Year 8. The owner discovers latent water damage caused by a defect in the original installation. The limitations clock starts. The owner has three years to file: until Year 11.
- Year 10. The repose clock expires. Any claim against the original builder is now barred — even though the limitations clock still has a year on it.
The owner has effectively two years (from discovery in Year 8 to the repose deadline in Year 10), not three. The earlier clock controls.
Worked example: a defective product
Many states impose a statute of repose on products-liability claims (often six to fifteen years from the date of first sale). Suppose the limitations period is two years from injury.
- If a 12-year-old machine injures someone in a state with a 10-year products repose, the products-liability claim against the manufacturer is barred regardless of when the injury occurred. Other claims against other defendants — premises liability against the property owner, for example — may still be alive.
- If the same injury happens with a 5-year-old machine, the limitations period (two years from injury) is the binding deadline; the repose clock has not yet expired.
The lesson: the two clocks measure different things, and the practical deadline is whichever runs out first.
Other common contexts
- Medical malpractice. Many states layer a discovery-based statute of limitations (often two to three years from discovery) on top of a statute of repose (commonly four to ten years from the date of the negligent act). Some states create exceptions for foreign objects left in a patient or for cases involving minors.
- Securities. Federal securities-fraud claims under Section 10(b) of the Securities Exchange Act and Rule 10b-5 are subject to a two-year limitations period from discovery and a five-year statute of repose from the violation. The Supreme Court has held the repose period is not subject to equitable tolling.
- Architectural and engineering services. Many states have repose periods for design professionals, often shorter than ordinary construction repose.
How to think about the two together
For practical purposes, when someone asks "do I still have time to sue?" the answer in any case where a repose statute might apply has three parts:
- Is there a statute of limitations on this kind of claim, and when did it start running? The discovery rule may extend the start date.
- Is there a statute of repose on this kind of claim, and when did the triggering event occur? Repose periods do not depend on injury or discovery.
- Which deadline comes first? Treat that as the practical deadline. Do not rely on the other.
Tolling rules add complexity — minor plaintiffs, defendants who fraudulently concealed the wrong, defendants temporarily out of the state — but they apply more readily to limitations periods than to repose periods. Anyone in this situation should treat the analysis as urgent and move quickly.
Where to find the actual numbers
The deadlines vary state by state and claim by claim. The starting point on this site is the statute of limitations by state guide. For specific contexts, see the practice-area pages: personal injury, real estate, and family law. Repose periods are typically buried in state code sections that sit alongside the limitations sections; the relevant state's statutes are the authoritative source.
Bottom line
If a case is anywhere close to either deadline, the right move is to talk to a lawyer immediately rather than wait for certainty. The find a lawyer page explains how to use state bar referral services. Once a clock has expired — limitations or repose — there is rarely a way to bring it back.