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Time Limit to Sue a Trustee for Breach of Trust in Ontario

How Ontario's Limitations Act, 2002 applies to claims against trustees: the two-year period, discovery, the 15-year limit and key exceptions.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • The general limitation period in Ontario is two years from the day a claim was discovered.
  • There is also a 15-year outer limit running from the act or omission.
  • Concealment, minority and incapacity can change how the clock runs.

If you are a beneficiary who suspects a trustee has mismanaged money, the question of timing matters as much as the question of whether there was a breach. Waiting too long can end a claim before it starts.

This article explains how Ontario's Limitations Act, 2002 generally works, including discovery, the 15-year limit and the main exceptions. Because each case turns on its own dates and facts, treat this as a starting point and speak to a lawyer promptly.

The basic two-year period

The general limitation period in Ontario is two years from the day the claim was discovered. After that, a court can refuse to hear the claim, even if it might otherwise have been strong.

The key question is therefore when the claim was discovered, not simply when the trustee did something wrong.

What "discovery" means

A claim is discovered when the claimant knew, or reasonably ought to have known, of it. The words "ought to have known" matter. If information was in front of you, such as account statements you received but never read, a court may treat you as having known.

Dates that are often relevant in trust disputes include:

Keep these records. If you are unsure when the clock started, assume the earlier date and get advice quickly.

The 15-year outer limit

Separately, no proceeding may be started more than 15 years after the act or omission. This limit counts from what the trustee did or failed to do, not from when you found out. So a beneficiary who finds out very late could still be out of time.

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

Exceptions that can pause the clock

SituationWhat the law says
Claimant is a minorThe two-year period does not run while the claimant is a minor and is not represented by a litigation guardian
Claimant is incapable of starting a proceedingThe two-year period does not run while the claimant is incapable and is not represented by a litigation guardian
Deliberate concealmentThe 15-year period does not run while the defendant wilfully conceals the loss
Tort claims involving a deceased personTrustee Act s. 38(3) keeps a separate deadline: tort actions by or against a deceased person's executor or administrator must be brought within two years of the death

Whether a particular claim against a trustee falls under the general rule or a special one depends on its nature. A lawyer can sort this out from your documents.

What a trustee is expected to do

Knowing what a trustee was supposed to do helps you decide whether something went wrong. In 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 it followed an investment plan or strategy that a prudent investor could adopt.

The terms of the trust also matter, because the Trustee Act's investment powers do not authorize or require a trustee to act inconsistently with them. A court may relieve a trustee from personal liability for a breach of trust 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 a particular decision was a breach depends on the trust document and the facts, so it is worth confirming with a lawyer.

What to do next

How talks with the trustee affect your deadlines depends on your situation, so it is worth confirming with a lawyer before relying on them.

Frequently asked questions

How long do I have to sue a trustee in Ontario?

The general limitation period is two years from the day the claim was discovered. There is also a 15-year limit from the act or omission. Exceptions can apply, so confirm the dates with a lawyer.

When is a claim discovered?

A claim is discovered when you knew, or reasonably ought to have known, of it. That can be earlier than the day you fully understood what happened.

Does the clock stop if the trustee hid the problem?

The 15-year limit does not run while the defendant wilfully conceals the loss, but the claimant must prove the concealment. The two-year period still depends on when you knew or ought to have known.

Are children and incapable beneficiaries treated differently?

Yes. The two-year period does not run while the claimant is a minor or is incapable of starting a proceeding, and is not represented by a litigation guardian.

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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