Your adjuster just told you that you’re 25% at fault for an accident you were sure wasn’t your doing, and now you’re wondering where that number even came from. It’s a common moment of confusion, because fault in an insurance claim doesn’t work the way most people assume - it isn’t a verdict handed down by police, and it isn’t just “whoever gets blamed at the scene.” Here’s how it actually gets decided.
Fault Is an Insurance Decision, Not a Police Decision
This is the single most useful thing to understand: police charges and insurance fault are two separate systems that happen to look related. A police officer might issue a ticket for something like following too closely or failing to yield - or issue no ticket at all - based on traffic law and what they observed or were told at the scene. Your insurer’s fault determination is a completely separate process, run by your insurance company (or your province’s public insurer) using its own investigation and, in many provinces, a standardized set of rules.
It’s entirely possible for no one to be charged and for an insurer to still assign fault, or for a charge to be laid without it perfectly mirroring the insurance fault split. If you’re waiting on a police report before you talk to your insurer about fault, you can stop waiting - notify your insurer promptly regardless, since most policies require prompt notice, and let the two processes run in parallel.
How Insurers Actually Assign Fault
In many provinces, insurers work from a standardized fault determination framework rather than each adjuster deciding independently from scratch. Ontario is the clearest example: its regulated Fault Determination Rules chart maps common collision scenarios - being rear-ended, a lane change, a left turn across traffic, and so on - to standard fault percentages. If your accident matches one of those scenarios, the chart drives a large part of the outcome. Other provinces use their own comparable frameworks, whether that’s a similar structured chart, an adjuster’s independent investigation weighing evidence and applicable traffic law, or in the full public-insurer provinces (BC, Saskatchewan, Manitoba), the Crown corporation’s internal fault-assessment process.
Adjusters typically consider:
- Your account and the other driver’s account of what happened
- Photos and physical evidence from the scene (vehicle positions, damage patterns, skid marks)
- Any police report or citation, where one exists
- Witness statements, if available
- Road, weather, and signal conditions at the time
The goal is to reconstruct what happened as accurately as possible and map it against the applicable rules or general principles of fault in your province.
Partial Fault Is Normal
You don’t need to be entirely at fault or entirely not at fault. A large share of claims settle at a split - say, one driver assigned a larger share of responsibility and the other a smaller share - rather than an all-or-nothing outcome. This matters practically because, in DCPD provinces, your fault percentage can affect your deductible and your premium impact at renewal, even if you weren’t the primary cause of the collision. If your adjuster tells you the split is, for example, mostly the other driver’s fault with a smaller share assigned to you, ask specifically what evidence or rule produced that number - you’re entitled to an explanation, not just a percentage.
DCPD and Fault Go Together
In provinces with Direct Compensation Property Damage (DCPD) - including Ontario, Alberta since 2022, and several Atlantic provinces - your fault percentage is what determines how the DCPD system pays your claim. If you’re found not at fault, you deal with your own insurer for your vehicle damage, and they’re compensated behind the scenes by the other driver’s insurer. If you’re found partially at fault, this generally still applies, but proportionate to the split. For the full explanation of how this works, see what is DCPD? Direct Compensation Property Damage explained. Provinces without DCPD, and the full public-insurer provinces, handle the fault-to-payout relationship through their own processes - check your specific provincial system rather than assuming DCPD applies everywhere.
If You Disagree With the Fault Determination
You’re not required to simply accept a fault split you think is wrong. A reasonable escalation path looks like:
- Ask your adjuster to walk you through the specific evidence or rule that produced the determination. Sometimes this alone clears up a misunderstanding - an angle in a photo, a detail in the other driver’s statement, or a chart scenario that doesn’t quite match what you remember.
- Provide additional evidence if you have it. Dashcam footage, additional photos, or a witness you hadn’t mentioned yet can all factor into a review.
- Request a formal review through your insurer’s internal process. Every insurer has an escalation path beyond your first adjuster conversation.
- Escalate further if needed. If the internal review doesn’t resolve things, private-insurer customers can pursue the General Insurance OmbudService (GIO); public-insurer customers should use their Crown corporation’s own internal appeal process. See how to dispute an insurance settlement in Canada for the full path.
A Quick Reference
| Question | Answer |
|---|---|
| Does a police charge automatically decide insurance fault? | No - they’re separate processes that may or may not align |
| Can fault be split between two drivers? | Yes, commonly, using percentages rather than all-or-nothing |
| Does every province use the same fault rules? | No - Ontario has a regulated chart; other provinces have their own frameworks |
| Can I dispute a fault determination? | Yes - start with your adjuster, then your insurer’s internal review, then GIO or your provincial regulator |
| Does fault affect my premium? | Generally, at-fault findings are more likely to affect renewal premiums than not-at-fault ones - ask your insurer about your specific policy |
Why This Matters Beyond the Claim Itself
Fault findings ripple outward: they influence your deductible in some DCPD scenarios, they factor into whether your premium rises at renewal (see will your insurance go up after an accident), and they can matter if the other driver decides to pursue anything beyond the standard property-damage process. This is also why documentation from the scene matters so much - the photos and information you gather in the first twenty minutes after a collision are frequently the deciding factor in how fault ultimately gets assigned. If you need a refresher on that process end-to-end, see the complete guide to car insurance claims in Canada and how to file a car insurance claim after an accident.
FAQ
Does a police officer decide who’s at fault for insurance purposes? No. Police charges and insurance fault determinations are separate processes. Your insurer (or your province’s public insurer) makes the fault call using its own investigation and, in many provinces, a standardized fault determination framework.
Can I be partially at fault? Yes, and it’s common. Insurers frequently assign a percentage split between drivers rather than an all-or-nothing outcome, which can affect your deductible and premium depending on your province and policy.
What if I think my fault percentage is wrong? Ask your adjuster to explain the specific evidence or rule behind the decision, provide any additional evidence you have, and request a formal internal review if you’re still not satisfied. From there you can escalate to GIO (private insurers) or your provincial regulator.
Does every province use the same fault determination rules? No. Ontario uses a regulated Fault Determination Rules chart; other provinces, including full public-insurer provinces, use their own frameworks. Confirm your specific province’s process with your insurer.
Does being found not at fault mean I don’t pay a deductible? In many DCPD provinces, not-at-fault claims often carry a $0 deductible, but this depends on your specific policy - confirm with your insurer rather than assuming.
Fault determination rules and specific processes vary by province and insurer - this is general guidance, and your own policy documents or a call to your insurer are the final word on your situation. If you’re dealing with a fresh accident and need a tow first, find a tow truck near you or check accident recovery towing.