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Find a Lawyer Ā» Canada Legal Guides Ā» Ontario Legal Guides Ā» Wills & Estate Planning Ontario Ā» Statute of Limitations for Contesting a Will in Ontario

Statute of Limitations for Contesting a Will in Ontario

12 Jun 2026 4 min read No comments Wills & Estate Planning Ontario

Under the Ontario Limitations Act, you generally have exactly two years from the date you discover a valid reason to challenge a Will to formally commence your lawsuit. Filing a Notice of Application at the Superior Court of Justice currently costs around $229 CAD.

Losing a loved one is emotionally devastating, but discovering that their final Will was forged, altered, or created under extreme pressure can compound the trauma. Whether you reside in Toronto, Windsor, Sudbury, or anywhere else in the province, contesting a Will requires you to act decisively. The Ontario legal system does not allow disgruntled beneficiaries to wait indefinitely before challenging an estate’s distribution.

In Ontario, all civil litigation, including estate disputes, is governed by the strict rules of the Limitations Act, 2002. Missing the limitation period almost always bars you from seeking justice, permanently extinguishing your right to a fair inheritance. Navigating court deadlines is highly stressful while grieving. If you suspect foul play regarding a family member’s Will, you can browse our directory to find a local estate litigation lawyer to review your case immediately.

Step-by-Step Process for Contesting a Will in Ontario

Challenging a testamentary document requires gathering compelling evidence of incapacity or undue influence before the clock runs out. Here is the general process applicants follow to safely commence their litigation within the provincial deadlines.

Step 1: Identify the “Discoverability” Date

The two-year limitation clock does not automatically start ticking on the date of the person’s death. Instead, Ontario operates on the “discoverability principle.” The clock starts on the day you actually knew, or reasonably ought to have known, that you had grounds for a lawsuit. For example, if you only discover a fraudulent secondary Will six months after the funeral, the two-year deadline usually begins on that date of discovery.

Step 2: File a Notice of Objection (Caveat)

If the Executor has not yet received the Certificate of Appointment of Estate Trustee (Probate), your lawyer should immediately file a Notice of Objection with the local Superior Court of Justice. This document essentially freezes the probate process, preventing the executor from liquidating bank accounts or selling the deceased’s real estate while you prepare your formal lawsuit.

Step 3: Gather Medical and Financial Evidence

Contesting a Will based on lack of mental capacity or undue influence requires objective proof. Your legal team will request the deceased’s complete medical charts, hospital records, and financial statements leading up to the signing of the Will. They may also interview the drafting lawyer and the witnesses who were present during the signing.

Step 4: Draft and Issue the Notice of Application

Before your two-year limitation period expires, your lawyer must formally issue a Notice of Application or Statement of Claim with the court. This official legal document outlines your allegations (e.g., Alzheimer’s disease prevented the deceased from understanding the document) and states exactly what remedy you are seeking from the judge.

Step 5: Serve the Executor and Beneficiaries

Once the court issues the document, you have a limited timeframe to personally serve it upon the Executor and any other beneficiaries whose inheritance might be affected by the challenge. Once served, the matter enters the formal litigation pipeline, moving toward mediation or an eventual trial.

How Much Does it Cost in Ontario?

Launching a formal Will challenge is a massive financial undertaking. You must be prepared for the following upfront and ongoing costs:

  • Court Filing Fees: Issuing a Notice of Application in the Ontario Superior Court of Justice currently costs approximately $229 CAD. Filing subsequent motions or affidavits carries additional smaller fees.
  • Medical Expert Fees: If you need a forensic psychiatrist to review the deceased’s medical records and draft a retrospective capacity assessment, expect to pay between $3,000 and $7,000 CAD.
  • Lawyer Fees: Estate litigation lawyers typically bill between $300 and $600+ CAD per hour. Taking a Will challenge all the way to a final trial can easily cost between $40,000 and $100,000 CAD.
  • Cost Consequences: If you lose your case, the judge may order you to pay a significant portion of the Executor’s legal fees out of your own pocket.
Action ItemTime Limit / DeadlineImportance
Standard Limitation Period2 Years from Discoverability.Crucial. Missing this entirely bars your right to sue.
Ultimate Limitation Period15 Years.Absolute cut-off, even if fraud is discovered decades later.
Dependant Support Claim6 Months from Grant of Probate.Strict deadline if you are a spouse or child seeking financial support from the estate.

How Long Does the Process Take?

While you only have two years to start the lawsuit, finishing it is a different story. Once the formal legal application is filed, gathering medical evidence, conducting out-of-court cross-examinations, and attending mandatory mediation can take between 12 to 24 months. If the parties refuse to settle and the matter proceeds to a full trial before an Ontario judge, the entire process can stretch to 3 or 4 years.

Frequently Asked Questions (FAQ)

Can the two-year deadline ever be extended?

Extensions are exceptionally rare and generally only granted if the person bringing the lawsuit lacked the mental capacity to sue during that timeframe, or if the delay was caused by deliberate concealment by the Executor.

What if probate has already been granted?

You can still challenge a Will after a Certificate of Appointment has been issued, provided you are within your two-year window. However, you must move quickly to seek an injunction before the Executor distributes the assets.

Do I need a lawyer to file a Notice of Objection?

While you are legally permitted to represent yourself (act as a self-represented litigant), estate law is highly complex. Filing incorrect forms can result in your objection being dismissed with legal costs awarded against you.

Can a child challenge a Will just because they were left out?

In Ontario, a capable adult generally has “testamentary freedom” to leave their money to whomever they choose. Being disinherited is not grounds for a challenge unless you can prove lack of capacity, undue influence, or that you were a financially dependent child.

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