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Unjust Enrichment Claims Against an Estate in Ontario

Cared for or worked for someone who died without being paid? Learn how unjust enrichment and constructive trust claims against an Ontario estate work.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • An unjust enrichment claim requires an enrichment, a corresponding deprivation, and no juristic reason for the enrichment.
  • For services, a fee-for-service money award is the default remedy, and a constructive trust is exceptional.
  • Time limits depend on the claim, and a general two-year period from discovery is common.

Many people look after a parent, relative or friend for years without pay, or work in a family business or on a property and are never compensated. When that person dies, the will may leave you nothing. You may wonder whether you can still claim from the estate.

Ontario law has a claim called unjust enrichment that can sometimes apply. This article explains what you have to prove, what remedies are usual and what to watch for. It is general information, not advice on your situation.

What unjust enrichment means

A claimant must prove an enrichment, a corresponding deprivation, and the absence of any juristic reason for the enrichment. In plain words, the deceased received a benefit, you lost something by providing it, and there was no legal reason such as a contract or a gift that explains why the deceased should keep it for free.

Whether care, labour or money you provided meets that test depends on the facts, including what was understood between you and the deceased. Because the claim turns on facts, the records and evidence you can gather often matter a great deal.

The usual remedy: payment for the value of the services

For unjust enrichment based on services, a monetary award calculated on a quantum meruit (fee-for-service) basis is the default remedy and should usually be enough. That means the court asks what your services were worth.

A proprietary remedy such as a constructive trust, which would give you an interest in a specific asset such as a house, is exceptional. If you hope for a share of property rather than a payment, expect to need strong reasons.

Protecting a claim to land

If you claim an interest in real estate, you may want to register a certificate of pending litigation. Starting a proceeding about an interest in land is not notice to non-parties until the court issues a certificate and it is registered, and it can be registered under either the Land Titles Act or the Registry Act.

The court may discharge a certificate if the claimant claims money instead of the land interest, has no reasonable claim to the land interest, or does not prosecute the proceeding with reasonable diligence. It may also discharge it if another form of security adequately protects the claimant, or on any other just ground. Since the usual remedy for services is money, this is a real risk to think through with a lawyer.

Time limits and process

Most claims must be started within two years after the day the claim was discovered. Discovery is the earlier of when the claimant actually knew, or when a reasonable person in their circumstances ought to have known. Claims by or against an estate for torts or injuries, other than libel and slander, must be started within two years of the death.

Which period applies to a caregiver or worker claim, and when it starts, varies with the claim and should be confirmed in each case. The two-year period also does not run while the claimant is incapable of starting a proceeding because of a physical, mental or psychological condition and has no litigation guardian.

Certain estate lawsuits are referred to mandatory mediation unless the court grants an exemption, and the Ontario government says the Mandatory Mediation Program operates in Toronto, Ottawa and Windsor. Mediation is mandatory in certain proceedings, including claims against an estate. Check whether this applies in your region.

Where mediation applies, the person who started the proceeding must move for directions within 30 days after the last day for submitting a Notice of Appearance (Form 75.4). The parties must choose a mediator within 30 days of the order giving directions, and each party must provide a Statement of Issues (Form 75.1C) at least seven days before mediation. The court's directions order sets the cost of mediation and how it is shared.

In the Toronto Region, the Estates List of the Superior Court of Justice hears estate, trust and capacity matters. Procedures differ by region, so a lawyer can confirm how a case would proceed where yours would be heard.

What to do next

A person with a financial interest in an estate can file Form 74P to ask the court to notify them when someone starts a proceeding involving the estate. Whether that helps depends on your position, so ask for advice.

Frequently asked questions

Can I claim from an estate for unpaid care?

Possibly. You must prove an enrichment, a corresponding deprivation, and no juristic reason for the enrichment. Whether your situation fits depends on the facts.

What can a court award me?

For services, a monetary award on a quantum meruit (fee-for-service) basis is the default and should usually be enough. A constructive trust is exceptional.

How long do I have to make a claim?

Most claims must be started within two years after discovery, and some claims by or against an estate for torts or injuries within two years of death. The right period depends on the claim, so confirm it with a lawyer.

Do I have to go to mediation?

Certain estate lawsuits are referred to mandatory mediation unless the court grants an exemption, and this includes claims against an estate in certain proceedings. A lawyer can tell you whether it applies to your case.

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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