How long do I have to sue in Quebec?

The number is the easy part

Three years is the default. What gets argued is almost never the length: it is the date the clock started.

Two files on the same facts can end up one admissible and the other prescribed, depending on how the starting point is established and documented.

Which is why a written chronology, made early, is worth more than any argument developed later.

Injury that appears gradually

This is the most useful rule in the chapter and the least known. Where injury appears gradually or belatedly, time runs not from the original event but from the day the injury first appears (article 2926).

Water infiltration surfacing three years after defective work; a financial loss that only shows up at the next audit — in those cases the starting point is not the obvious one.

You still have to be able to place that first appearance. Dated photos, emails, expert reports, invoices: those fix the date, not recollection.

Annulling a contract: a separate starting point

An action to annul a contract has its own rule. Time runs from knowledge of the ground of nullity by the person invoking it, or from the cessation of violence or fear (article 2927).

That changes everything for fraud discovered long after signature. A contract can be five years old and the claim still open, if the deception only came to light recently.

The difficulty then shifts to proving when discovery occurred, which becomes the heart of the file.

What the clock does not wait for

Prescription is not suspended because you are negotiating, because the other side promises to settle, or because an insurer is reviewing the file. Many claims are lost during a cordial discussion that drags.

A formal notice does not suspend it either. It is useful for other reasons, but it does not stop the clock.

Two things do interrupt it. Acknowledgment of the right by the debtor — for example a writing admitting the debt, or a partial payment — interrupts prescription (article 2898). And filing a judicial application before the period expires interrupts it too, provided it is served no later than 60 days after expiry (article 2892).

If the deadline is approaching and nothing is resolved, the question is no longer whether you want to sue, but whether you want to keep the right to.

Two rules contracts cannot touch

First, you cannot agree around it: a prescriptive period other than the one provided by law cannot be stipulated (article 2884). A contract clause purporting to cut prescription to one year does not have that effect. Do not confuse the two, though: a notice obligation — reporting a loss, giving notice of a defect — is a different thing, and that one does bind you.

Second, prescription does not run against persons who are in fact unable to act, either themselves or through a representative (article 2904). That is a genuine suspension, distinct from mere difficulty or ignorance of the law.

Shorter periods, and claims that never prescribe

Three years is a default, not a universal rule. Many regimes impose shorter periods: notice obligations in insurance contracts, notice deadlines for latent defects, applications to certain administrative tribunals.

Conversely, the Code provides longer periods and, in certain serious cases of violence, claims that never prescribe.

The only safe conclusion: the applicable period is checked file by file, and it is checked early.