The Time Limit for Dependant Support Claims in Ontario

Most legal deadlines feel abstract until you're the one at risk of missing one. The dependant support claim deadline in Ontario is unusually strict, and it doesn't start when most people assume it does. If you think you might have a claim against a loved one's estate, understanding exactly when this clock starts — and what happens if it runs out — matters more than almost anything else in your case.

The Six-Month Clock, and What Actually Starts It

As of mid-2026, a dependant's support claim under the Succession Law Reform Act generally must be brought within six months — verify the current deadline before relying on it, since it is set by statute and could be amended. Critically, that six-month period runs from when the estate certificate — the Certificate of Appointment of Estate Trustee — is granted, not from the date of death itself. If no one has applied for an estate certificate yet, the clock for this particular deadline generally hasn't started.

Why That Distinction Matters

This creates two very different practical situations:

• If a family member moves quickly to get appointed as estate trustee, the six-month window opens (and can close) relatively soon after death.
• If nobody applies for a certificate for months, or if the estate is small and no certificate is ever obtained, the trigger for this specific deadline may not occur the way you'd expect — but that doesn't mean you should wait, since assets can still be distributed informally in the meantime.

What Happens If You Miss the Deadline

Missing the six-month window doesn't automatically end your claim. A court has some discretion to allow a late application — but only against any part of the estate that has not yet been distributed. In practice, this means the real risk of missing the deadline isn't a hard legal wall so much as a shrinking pool of assets: the longer you wait, the more likely the estate has already been paid out to beneficiaries, leaving nothing left for the court's discretion to reach.

A Practical Timeline

1. Death occurs. The support relationship that existed immediately before death is what matters for a later claim — start gathering evidence of it now.
2. Someone applies for a Certificate of Appointment of Estate Trustee. Ask the estate trustee, a beneficiary, or a lawyer whether this has happened yet.
3. The certificate is granted. This is when the six-month clock for a dependant's support claim begins running.
4. You bring your claim within that window, ideally with legal advice well before the deadline approaches.
5. After six months, only undistributed portions of the estate remain reachable, and only with the court's discretion — so distributed assets are generally out of reach.

Steps to Take If You Think You Might Have a Claim

• [ ] Find out whether an estate certificate has already been applied for or granted
• [ ] Gather evidence of the support relationship that existed immediately before death
• [ ] Speak with a lawyer promptly, rather than waiting to see how the estate unfolds
• [ ] Ask about putting the estate trustee on notice of a potential claim, which can help slow down distributions

Why "Just Wait and See" Is a Risky Strategy

It's tempting to hold off on a claim while a family sorts through grief and administration, especially when relationships are already strained. But the estate certificate can be granted, and assets distributed, faster than many people expect — particularly for smaller or simpler estates. Because the court's discretion to help a late claimant only reaches undistributed assets, delay doesn't just risk a missed technical deadline; it risks the practical disappearance of the very funds a claim would target. Getting an early, even preliminary, legal assessment costs far less than losing the ability to recover anything at all.

This Deadline Is Different From a Will Challenge Deadline

It's worth noting that a dependant's support claim is a distinct legal proceeding from challenging a will's validity on grounds like capacity, undue influence, or improper execution. Those challenges are generally subject to Ontario's basic civil limitation period rather than this six-month rule. If your situation might involve both a possible dependant's support claim and concerns about the will's validity, flag both issues to a lawyer early, since they run on different clocks and require different evidence.

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