How long you have to sue in Canada: limitation periods by province

In short: In Canada there is no single deadline to sue. Limitation periods are set province by province, and most provinces now use a basic two-year period that starts when you discover your claim, not when the harm happened. Quebec is the big exception, with a general three-year prescription (art. 2925 CCQ). A handful of provinces and the territories still use older rules where the deadline depends on the type of claim. Miss the period and your case is usually barred for good. CourtStairs answers questions like these in plain language, with citations to the actual statute for your province.

If someone has wronged you, "how long do I have to sue?" is one of the most important questions you can ask, and one of the easiest to get wrong. Because civil procedure is provincial, the answer changes at the border between Ontario and Quebec, or between Alberta and BC. This post gives a province-by-province map, explains when the clock starts, and shows how the discoverability rule can quietly move that start date.

The two-year norm, and the Quebec exception

Over the past two decades, most common-law provinces reformed their limitation statutes to converge on a single, simple rule: a basic two-year period that runs from discovery of the claim, backed by a longer ultimate period measured from the wrongful act. Ontario's Limitations Act, 2002 set the template; BC, Alberta, Saskatchewan, Nova Scotia and New Brunswick followed with similar structures, and Manitoba joined them when its new Limitations Act came into force on September 30, 2022.

Quebec, a civil-law jurisdiction, works differently. It uses prescription rather than "limitation," and its general period for enforcing a personal right is three years under article 2925 of the Civil Code of Québec.

The province-by-province table

The figures below are the general civil limitation periods as of 2026. Special claims (defamation, claims against public bodies, sexual assault, construction, and others) often have their own rules, so treat this as a map, not the final word.

Notice the pattern: the seven "reformed" common-law provinces line up at two years from discovery, Quebec sits at three, and the older regimes (Newfoundland and Labrador, PEI, and the three territories) keep category-based deadlines where the number depends on what kind of claim you are bringing.

When does the clock start? Discoverability

The single most misunderstood point is when the period begins. In the reformed provinces it does not start on the day you were harmed. It starts on the day you discovered the claim, which the statutes define as the day you first knew, or a reasonable person in your position ought to have known, that:

• an injury, loss, or damage had occurred;
• it was caused by, or contributed to by, the other party's act or omission; and
• a court proceeding would be an appropriate way to seek a remedy.

Until all of those are met, the clock generally has not started. This matters most for hidden harms, a latent building defect, a slow-developing injury, or a professional's error you could not have spotted at the time.

1. The act or omission happensThe wrong occurs, but the limitation clock may not start yet if you could not reasonably know about it.
2. You discover the claimYou knew, or ought to have known, about the injury, its cause, and that suing is appropriate. In most provinces the two-year clock starts here.
3. The basic period runs outTwo years later (three in Quebec), your right to file a lawsuit generally expires.
4. The ultimate period endsEven if you never discovered the claim, an outer cap (often 15 years, 10 in Alberta) runs from the original act and cannot be extended.

Quebec reaches a similar result by a different route: article 2926 CCQ provides that where damage appears gradually or later, prescription runs only from the day the damage first manifests itself.

The ultimate limitation period: the hard backstop

Discoverability protects claimants who genuinely could not have known. But it cannot run forever, so most provinces pair it with an ultimate limitation period that starts on the day of the wrongful act and ignores discovery entirely. It is commonly 15 years (Ontario, BC, Saskatchewan, Nova Scotia, New Brunswick), 10 years in Alberta, and 30 years in Manitoba and Newfoundland and Labrador. Once that outer window closes, the claim is barred even if you only just found out about it, subject to narrow exceptions such as willful concealment.

Exceptions that change the math

The basic period is only the starting point. Several situations shift it:

• Minors and incapacity. For someone under the age of majority or without legal capacity, the clock is usually suspended until a litigation guardian is appointed or capacity returns.
• Claims against government. Suing a municipality or the Crown often triggers a short notice requirement (sometimes measured in days) on top of the limitation period.
• Specific claim types. Defamation, some sexual-assault claims (where several provinces have removed any limitation period), aboriginal claims, and enforcement of judgments all follow their own timelines.
• Contract clauses. In some provinces, parties can agree to shorten or lengthen the basic period within limits set by the statute.

Because these carve-outs can either extend a deadline or impose a much shorter one, the safe move is always to check the specific rule for your claim and province rather than assuming "two years" covers you. If your claim is smaller, the deadline still applies even in small claims court — the dollar limit changes, but the limitation clock does not.

Why the variation exists

The differences are not random. The administration of justice within a province, including civil procedure and limitation periods, falls under provincial jurisdiction. Each legislature has struck its own balance between giving claimants a fair chance to sue and giving potential defendants certainty that old claims will not resurface. The reform wave produced the tidy two-year-from-discovery model in most provinces; Quebec's civil-law tradition kept prescription at three years; and a few jurisdictions have not yet modernized, leaving the older category lists in place. The practical lesson is the recurring one across Canadian law: the answer is provincial, so confirm the rule for your jurisdiction before you rely on it.

Where CourtStairs fits

CourtStairs answers everyday questions like "how long do I have to sue?" with citations to the primary source for your province, the Limitations Act, the Civil Code of Québec, or your province's Limitation of Actions Act, so you can read the deadline in the statute itself before you act on it.

This post is general information, not legal advice. Limitation periods, exceptions, and start dates vary by province and by the type of claim, and they change over time, so confirm the current rule against the official statute or a lawyer before relying on it. If a deadline may be close, treat it as urgent.