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How Long Do You Have to Sue a Trustee in Ontario?

Learn how Ontario's two-year and 15-year limitation periods apply to claims against a trustee, when the clock starts, and the key exceptions.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • The general limitation period in Ontario is two years from the day a claim was discovered.
  • Even if you did not know about a claim, no proceeding may be started more than 15 years after the act or omission, subject to exceptions such as wilful concealment.
  • Minors, incapable persons and claims involving a deceased person's executor or administrator can have different timing rules.

If you are a beneficiary and think a trustee has mishandled trust property, one of your first questions is likely how long you have to act. Waiting too long can end a claim, even a strong one.

This article explains the main time limits that apply in Ontario, when the clock generally starts, and the exceptions that can change the timing. Your own deadline depends on your facts, so confirm it with a lawyer as early as you can.

The basic two-year rule

The general limitation period in Ontario is two years from the day the claim was discovered. This comes from the Limitations Act, 2002.

After the limitation period ends, a court can generally refuse to hear the claim, no matter how serious the complaint was. That is why it matters to know when the clock started.

When does the clock start?

A claim is discovered when you knew, or reasonably ought to have known, of it. So the clock does not necessarily start on the day the trustee did something. It can depend on what you knew and what you could reasonably have found out.

This is often the hardest part of a trust dispute. Reviewing trust statements, accounts and correspondence can help you work out when you first knew, or should have known, about a problem.

The 15-year outer limit and its exceptions

No proceeding may be started more than 15 years after the act or omission. This is a separate, outer limit.

There is an exception for wilful concealment. The 15-year period does not run while the defendant wilfully conceals the loss, and the claimant must prove the concealment.

Time limitLengthMain exception
General limitation periodTwo years from discoveryMinors and incapable persons without a litigation guardian
Outer limit15 years after the act or omissionWilful concealment of the loss
Claims involving a deceased person's executor or administratorTwo years from the death for tort actionsDepends on the facts of the claim

Minors, incapable persons and deceased persons

In Ontario, a person stops being a minor at 18. Where a minor or unborn person has an interest, the Office of the Children's Lawyer must be served with an application to vary a trust or to pass estate accounts.

If either situation may apply to you, do not assume the usual rule fits. Get advice on which deadline applies.

Protections for trustees and other options

A time limit is only one issue in a claim against a trustee. A trustee has defences that go to the merits, and there are options other than a lawsuit. Knowing about them can help you decide how to approach a dispute.

When investing trust property, a trustee must use the care, skill, diligence and judgment of a prudent investor. A trustee is not liable for an investment loss if the conduct that led to the loss followed an investment plan or strategy that a prudent investor could adopt.

For a breach of trust, a court may relieve a trustee wholly or partly from personal liability if the trustee acted honestly and reasonably and ought fairly to be excused. That relief does not apply to losses from investing trust property.

Whether any of these options affects your deadline depends on your situation, so it is worth confirming with a lawyer.

What to do next

Frequently asked questions

Is there one deadline for every claim against a trustee?

No. The general rule is two years from discovery, with a 15-year outer limit, but exceptions exist. Claims involving a deceased person's executor or administrator can carry a separate deadline.

What if the trustee hid what happened?

The 15-year period does not run while the defendant wilfully conceals the loss. You must prove the concealment.

Does the clock run while I am a minor?

The two-year period does not run while you are a minor and not represented by a litigation guardian. The two-year period also does not run while you are incapable of starting a proceeding and are not represented by a litigation guardian.

What does 'discovered' mean?

A claim is discovered when you knew, or reasonably ought to have known, of it. Because this depends on the facts, it is worth having a lawyer review your timeline.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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