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Personal Injury Guide

Ontario Accident Benefits: Disputing a Denial at the LAT

9 min readUpdated January 15, 2026

Ontario runs a partial no-fault system, and the distinction matters enormously: you claim statutory accident benefits from **your own insurer** regardless of who caused the crash, and you may **separately** sue the at-fault driver for pain and suffering.

Two parallel tracks, two sets of deadlines. This guide covers the benefits side and how to dispute a denial. General information — accident benefits disputes are technical and insurers are always represented.

Two tracks, both running at once

**Track one — accident benefits (SABS):** payable by your own insurer without regard to fault. This covers income replacement, medical and rehabilitation treatment, attendant care and other benefits, subject to limits.

**Track two — the tort claim:** a lawsuit against the at-fault driver for pain and suffering and losses not covered by benefits. Ontario applies a statutory deductible and threshold, which is why smaller claims often aren't worth pursuing in tort. This is fundamentally different from Quebec, where suing for bodily injury is generally barred outright.

The forms, and the trap in them

Benefits start with an application package your insurer must provide, and the treatment you receive is authorised through treatment plans submitted by your provider. Complete the forms promptly and accurately — inconsistencies between what you report and what your medical records show are the material most often used against claimants.

Keep every document: the application, all treatment plans, denials, insurer medical assessments, and your own treating records. A denial letter must identify what is being denied and why; if it doesn't, ask in writing.

Catastrophic impairment — where the money is

A catastrophic impairment determination unlocks substantially higher medical, rehabilitation and attendant care limits. Disputes over that designation are the most consequential accident benefits matters there are.

These determinations turn on defined criteria and expert assessment, and insurers routinely obtain their own assessments reaching different conclusions. If catastrophic impairment is in play, representation is effectively essential.

Disputing at the LAT

SABS disputes go to the **Licence Appeal Tribunal's** Automobile Accident Benefits Service — not to court. There is a required step before filing, and a strict limitation period running from the insurer's denial, so the denial letter starts a clock.

LAT decisions can be reconsidered by the tribunal or appealed to the Divisional Court on a question of law. Note the tort limitation period runs independently: pursuing benefits does not preserve your right to sue, and letting that lapse while focused on benefits is a costly and common mistake.

Frequently asked questions

Can I claim benefits if the accident was my fault?
Yes. Statutory accident benefits are payable by your own insurer regardless of fault — that's the no-fault component of Ontario's system.
Can I also sue the other driver?
Often yes, for pain and suffering and uncovered losses, subject to a statutory deductible and threshold. That is a separate claim with its own limitation period.
Where do benefits disputes go?
To the Licence Appeal Tribunal's AABS stream, not to court. A required step applies before filing and the limitation period runs from the denial.
What is catastrophic impairment?
A designation based on defined criteria that unlocks much higher benefit limits. Disputes over it are the highest-value accident benefits matters and warrant representation.
Do I need a lawyer?
For anything beyond a minor claim, strongly advisable — insurers are represented, the rules are technical, and many personal injury lawyers work on contingency.

This guide is general information, not legal advice. Laws, costs, and procedures vary by state, province, and your specific situation — speak with a qualified personal injury lawyer about your circumstances before acting.

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