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Can a Trustee Invest Trust Money However They Want in Ontario?

Understand the prudent investor standard under Ontario's Trustee Act, diversification, getting advice, and when a trustee is protected from investment losses.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • A trustee investing trust property must use the care, skill, diligence and judgment of a prudent investor.
  • A trustee must diversify to an appropriate extent and may obtain advice or delegate investment functions.
  • A trustee is not liable for a loss if the conduct followed a plan or strategy a prudent investor could adopt.

Trust money is not the trustee's own, so a trustee cannot invest it however they please. Ontario's Trustee Act sets out a standard of care for investing.

This article explains that standard in plain words, what it asks of a trustee, and how the law treats investment losses. The trust document itself can matter, so a lawyer can confirm how it applies to your trust.

The prudent investor standard

Under Trustee Act s. 27(1), a trustee investing trust property must use the care, skill, diligence and judgment of a prudent investor. The question is not whether an investment made money, but whether the trustee went about it carefully.

In plain words, the standard looks at the trustee's process. A trustee who thinks through the choices, gets help where it is needed and acts with the care a sensible investor would use is in a very different position from one who simply gambles with money that belongs to the beneficiaries. Whether a particular choice meets the standard depends on the facts, so it is worth confirming with a lawyer.

Planning, diversifying and getting help

A trustee must consider listed criteria when planning investments, must diversify to an appropriate extent, and may obtain investment advice. A trustee may also delegate investment functions to an agent.

Written records matter because they show how a decision was reached. If a beneficiary later questions an investment, a trustee who can point to a plan and the reasons behind it is better placed to explain what happened.

The terms of the trust still matter

The Trustee Act's investment powers do not authorize or require a trustee to act inconsistently with the terms of the trust. A trustee should read the trust document carefully before investing.

The trust document may also deal with how the trustee is paid. A trustee is entitled to a fair and reasonable allowance for their care, pains and trouble and the time spent, and a judge of the Superior Court of Justice fixes it. That section does not apply where the document creating the trust fixes the allowance. A trustee may also pay a trust expense personally and recover the same amount from the trust property, although the court may later disallow the expense.

When investments lose money

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.

A court can sometimes 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, so the trustee relies on the plan-or-strategy protection instead.

Holding a trustee to account

Beneficiaries who are worried about how money is being invested have some options. A person who appears to have a financial interest in an estate may bring a motion for an order requiring the estate trustee to pass accounts. A trustee who wants to pass the accounts of dealings with the trust may file them in the office of the Superior Court of Justice.

Rules 74.17 and 74.18 of the Rules of Civil Procedure govern the passing of estate trustees' accounts, and with necessary modifications they also apply to other trustees. The trustee files the accounts verified by affidavit, and the court then issues a notice of application to pass accounts. The notice and a draft judgment must be served on everyone with a contingent or vested interest, at least 60 days before the hearing if service is in Ontario. A beneficiary who objects to the accounts must serve and file a notice of objection at least 35 days before the hearing date.

If you want a trustee replaced, the Superior Court of Justice may appoint a new trustee or trustees, either replacing or adding to existing trustees. For executors and other personal representatives, the court may remove them on any ground on which it could remove any other trustee and appoint someone else in their place.

Time limits apply to claims. The general limitation period in Ontario is two years from the day a claim was discovered, and a claim is discovered when the claimant knew, or reasonably ought to have known, of it. No proceeding may be started more than 15 years after the act or omission. There are exceptions, including where the defendant wilfully conceals the loss, and where the claimant is a minor or incapable of starting a proceeding and has no litigation guardian. Because deadlines can end a claim, it is sensible to get legal advice early.

What to do next

Frequently asked questions

What is a prudent investor?

The Trustee Act requires a trustee to use the care, skill, diligence and judgment of a prudent investor. In practice, that means a careful, planned approach.

Must a trustee diversify?

Yes, a trustee must diversify to an appropriate extent. What is appropriate depends on the trust and its circumstances.

Can a trustee hire an investment adviser?

Yes. A trustee may obtain investment advice and may delegate investment functions to an agent.

Is a trustee liable for every investment loss?

No. A trustee is not liable if the conduct leading to the loss followed a plan or strategy that a prudent investor could adopt. Whether that applies depends on the facts.

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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