Two people can suffer similar injuries, consult lawyers about them and still face different deadlines for bringing a claim.

The reason is that Canada does not have one national rule for personal injury lawsuits. Each province has its own limitation legislation, and the deadline can depend on more than the date an accident happened.

A person injured in Calgary may have a different timeline from someone injured in Toronto or Vancouver. A claim that was not immediately discoverable can raise another issue altogether. Add a municipality, a minor claimant or a cross-border accident, and the calendar becomes considerably more complicated.

That is why the first question should not be, “Do I have two years?”

It should be, which limitation period applies to this claim, and when did it begin?

The two-year rule is only the starting point

In many Canadian provinces, two years is the basic limitation period for personal injury claims.

That includes Alberta, Ontario, British Columbia, Manitoba, Saskatchewan and New Brunswick, although the legislation and exceptions differ between jurisdictions.

The comparison looks like this:

These figures provide a useful snapshot, but they should not be treated as a universal countdown. If you are dealing with an injury claim, speaking with a personal injury lawyer in the relevant jurisdiction can help clarify which deadline applies to your circumstances.

When does the limitation period actually begin?

Consider a straightforward example.

Someone is injured in a collision on September 14, 2026. If the applicable rule simply counted two years from the accident, the deadline would appear to be September 14, 2028.

Personal injury law can be more complicated than that.

Many provinces use some form of discoverability rule. The relevant date can depend on when the injured person knew, or reasonably ought to have known, that they had suffered actionable harm and that another person could be legally responsible.

That distinction can become significant in cases where an injury develops gradually or its cause is unclear.

For example, a person may experience persistent symptoms after an accident but initially believe they will resolve with treatment. Months later, medical evidence may point to a more serious injury connected to the accident.

The legal question is not simply when the person first felt pain. It can involve when the claim itself was reasonably discoverable under the legislation that applies.

This is one reason the answer to what is a limitation period cannot be reduced to a number on a calendar.

Alberta puts an outer limit on delayed claims

Alberta provides a useful example of why basic and ultimate limitation periods need to be considered separately.

Under Alberta’s Limitations Act, the basic limitation period is generally two years from the date the claimant knew, or ought to have known, that the injury or loss occurred, that it was attributable to the defendant’s conduct and that a proceeding would be an appropriate way to seek a remedy.

There is also a 10-year ultimate limitation period.

The two rules serve different purposes.

The basic period deals with discoverability. The ultimate period provides a longer-stop deadline that can apply even when a claim was discovered later.

So, for someone researching the limitation period Alberta law provides, “two years” is an incomplete answer.

Ontario and British Columbia use a longer ultimate period

Ontario and British Columbia follow a similar broad structure but give claimants a longer ultimate period.

Ontario’s Limitations Act, 2002 generally provides a two-year basic limitation period and a 15-year ultimate limitation period.

British Columbia’s Limitation Act also generally uses two years from discovery, with a 15-year ultimate limitation period.

On the surface, those rules look almost identical. The practical details are not interchangeable.

The legislation in each province contains its own rules concerning discoverability, extensions, postponement, exceptions and specific types of proceedings.

That is why copying an Alberta deadline onto an Ontario claim, or vice versa, can produce the wrong answer even when both provinces appear to follow the same two-year rule.

Québec shows why Canada cannot have one universal answer

Québec takes a different legal route.

Personal injury claims there are governed by the Civil Code of Québec rather than the common-law framework used in the other provinces. Article 2930 also provides specific rules for bodily injury claims, while Article 2925 establishes a general three-year prescriptive period for personal rights.

That distinction is more than a difference in terminology.

A comparison between Alberta and Québec therefore involves different legal systems, not simply different numbers on a chart.

For anyone dealing with an injury connected to Québec, the applicable Civil Code provisions need to be considered directly.

The deadline can arrive before the deadline

There is another trap that receives less attention than the basic limitation period.

Some claims have notice requirements that arrive much sooner.

Claims involving municipalities and other public bodies can have special statutory requirements. Automobile accidents can also involve insurance-related deadlines and prescribed forms.

This creates a situation where a person may believe they have almost two years to deal with everything, while another requirement has already started running.

A useful timeline should therefore include:

• the date of the accident or injury;

• the date the injury was discovered;

• the date the claim was discovered;

• any insurance notification deadline;

• any statutory notice requirement;

• the basic limitation deadline; and

• the ultimate limitation deadline, if applicable.

Keeping those dates separate can prevent the common mistake of treating every legal deadline as the same clock.

What if the accident happened in another province?

Now consider a different scenario.

You live in Alberta. You travel to British Columbia and are injured in an accident there. The defendant lives in another province.

Which province’s limitation law applies?

There is no automatic answer based solely on your home address.

Cross-provincial disputes can involve jurisdiction and conflict-of-laws principles that determine which law governs particular issues. The location of the accident, the parties, the nature of the claim and other circumstances can all become relevant.

This is particularly important for people who travel frequently or are injured while working, driving or receiving services outside their home province.

The safest assumption is not that the law where you live automatically controls the claim.

So how long do you really have to sue?

For someone asking how long do I have to sue someone, the honest answer is: it depends on the claim and the jurisdiction.

A two-year limitation period is common, but it is not a Canadian universal deadline.

The date of the accident may not be the date the limitation clock starts. A special statutory rule may create another deadline. An ultimate limitation period may restrict how long a claim can remain viable. And a claim involving more than one province can raise a separate question about which jurisdiction’s law applies.

Those details can change the outcome of a claim.

The best approach is to establish the relevant dates early, identify the legislation governing the claim and check for any shorter notice or statutory deadlines. A limitation period is not simply a number to remember. It is a legal clock, and the first task is figuring out which clock is actually running.

Written by

Editorial Desk

Articles published under the Editorial Desk byline may include material from various sources and are reviewed internally to ensure clarity, factual consistency, and compliance with the site’s editorial standards. Content is published for general informational purposes only and follows applicable content and publishing guidelines

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Edited by

Sadia Parveen

Sadia Parveen serves as an editor responsible for reviewing articles for clarity, structure, and editorial consistency. Her role is limited to editorial review and presentation, ensuring content remains neutral, factual, and suitable for informational publishing. She does not provide legal analysis or professional advice.

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