The Two-Year Clock: Limitation Periods for Long-Term Disability Claims in Ontario

Most people whose long-term disability benefits are refused focus on the medical side of the dispute, which is understandable. The deadline for taking legal action gets far less attention, yet it is the one issue that can end a claim regardless of how strong the medical evidence is. In Ontario, that deadline is usually shorter, and starts earlier, than people expect.

The basic rule under the Limitations Act, 2002

Lawsuits against a disability insurer in Ontario are generally governed by the Limitations Act, 2002. Section 4 sets a basic limitation period of two years from the day a claim is "discovered." Section 5 explains what discovery means: the day the person knew, or reasonably ought to have known, that they had suffered a loss, that it was caused by the other party, and that a legal proceeding would be an appropriate way to fix it.

For a disability claim, the "loss" is typically the insurer's refusal to pay or its decision to stop paying. That sounds simple. The difficulty is that insurers rarely communicate in one clean, final letter. A claim may be denied, reopened, sent for more medical records, reviewed by a consultant and denied again. Each step can blur the question of when the two years began.

What the courts have said about the start date

Two Ontario Court of Appeal decisions show how much the facts matter.

In Kassburg v. Sun Life Assurance Company of Canada, 2014 ONCA 922, the insurer argued the clock ran from its first denial in December 2008. The motion judge found instead that the claimant discovered her claim in February 2011, when Sun Life told her that her final internal appeal had failed, and the Court of Appeal declined to interfere. As a summary of the decision by Harper Grey LLP notes, the court also upheld the finding that the policy's own, shorter limitation clause was unenforceable because the contract and the employee booklet described it differently.

Claimants sometimes read Kassburg as a promise that the clock waits for every internal appeal. It is not. The court treated discovery as a question of fact, and later cases have gone the other way. In Kumarasamy v. Western Life Assurance Company, 2021 ONCA 849, the Court of Appeal found the action was out of time. As Stewart McKelvey's analysis of the case explains, the court rejected the idea that the clock waits for a "clear and unequivocal denial." It pointed instead to earlier dates, including when the insurer closed the file, both more than two years before the lawsuit began.

The Court of Appeal has also stressed, in Nasr Hospitality Services Inc. v. Intact Insurance, 2018 ONCA 725, that ongoing discussions with an insurer do not automatically pause the limitation period. That case involved property insurance rather than disability coverage, but the reasoning about certainty in limitation periods is frequently raised in disability disputes as well.

Internal appeals and the risk of waiting

Most group disability policies offer one or more internal appeals. They can be worth pursuing: an appeal is a chance to add specialist reports, functional assessments or clearer statements from a treating physician. The trap is assuming that the time spent appealing does not count.

A cautious approach treats the date of the first written denial or termination as the possible start of the two years, unless and until there is a clear reason to think otherwise. Several practical steps follow from that:

• Keep every letter from the insurer, with the envelope or email showing the date it arrived.
• Write down the date of the first denial and calculate two years from that day.
• Ask the insurer, in writing, how long each appeal stage is expected to take.
• If the deadline is getting close and the appeal is unresolved, discuss whether a lawsuit should be started to protect the claim, or whether a written agreement suspending the limitation period is available.

Policy wording and other deadlines

The two-year period for suing is not the only time limit in play. Policies usually require the employee to give notice of the disability and file a proof of claim within set periods, and appeal requests often have their own windows, which vary from plan to plan and are usually stated in the denial letter. Missing those can create problems even when the lawsuit deadline is far away.

Some policies also set out a shorter period for legal action. Whether that clause holds up depends on its exact wording, on the documents the employee received, and on the limits the Limitations Act places on contracting out of the statutory period. Kassburg is a reminder that inconsistent wording can make such a clause unenforceable, but nobody should rely on that outcome without having the policy reviewed.

Getting the timeline checked early

Because the start date depends so heavily on the specific letters and events in a file, the most useful thing a claimant can do is have the timeline reviewed while there is still time to act. A firm that focuses on disability and injury claims in Ontario, such as Lang Lawyers, will generally want to see that chronology early: when the person stopped working, when the claim was filed, every decision the insurer issued and every appeal submitted. That document often reveals whether there is room to keep appealing or whether the claim needs to be protected in court first.

It also helps to request a complete copy of the claim file from the insurer, including internal notes and consultant reviews. That file frequently shows exactly when a decision was made, and it can be the best evidence of when the limitation period began. This article provides general information only; the right deadline in any individual case depends on its own facts.