Fault decides everything downstream: who pays for repairs, who funds the hire car, whose premium wears it. Yet most drivers can't say who actually *makes* the fault decision. Short answer: insurers first, courts last, and evidence all the way through.
Who actually decides?
- The insurers make the working decision. Claims teams on both sides review statements, evidence and the road rules, then accept, deny or apportion liability. Most claims are decided entirely at this level.
- Police don't allocate civil fault. They attend serious crashes, record events and sometimes issue infringements. An infringement is *strong evidence* of fault, but the insurer decision is separate; no charges doesn't mean no liability.
- Courts are the final arbiter when insurers deadlock, a small minority of property claims, since running a hearing usually costs more than the argument.
The evidence hierarchy (what actually persuades)
- 1 Dashcam footage: the closest thing to a trump card; it ends most arguments in minutes
- 2 Independent witnesses: no stake in the outcome, so their account outweighs both drivers'
- 3 Physical evidence: damage location and geometry, debris fields, skid marks, final positions; impacts don't lie about direction
- 4 Photos of the scene: positions, signage, sight lines, weather, taken before anything moved
- 5 Police event records and infringements: official, contemporaneous, hard to argue with
- 6 Driver statements: necessary, but the most self-interested layer; consistency with the physical evidence is what gives a statement weight
The yardstick: the road rules
Insurers map the evidence against the NSW road rules: whoever breached a duty is where fault settles. The recurring patterns:
- Rear-end: the following driver's safe-distance duty; the rule and its exceptions
- Give-way and roundabout collisions: the driver required to give way and didn't
- Lane changes and merges: the moving driver must do so safely; the car already in the lane holds the presumption
- Reversing: a reversing driver must not start or continue unless safe; heavy presumption against them
- Parked-car hits: a lawfully parked, unattended car can't contribute; identification is the only battle
Shared fault: contributory negligence
Fault isn't binary: insurers can apportion it (70/30, 50/50) where both drivers breached a duty. The split flows straight through your claim: at 70/30 in your favour, you recover 70% of your losses from their side. Two practical notes: apportionment is negotiable, and an opening "let's call it 50/50" is often an anchor, not an assessment. Evidence moves it. A substantially-at-fault finding also affects hire-car eligibility, which is why we assess fault honestly before anything starts.
The 48-hour evidence rule
Dashcam clips overwrite, shop CCTV cycles within days, witnesses' memories soften, debris gets swept. Whatever the fault question, the evidence that answers it mostly exists in the first 48 hours. Capture it per the after-accident checklist, then argue at leisure.
Quick answers
Does a police report decide who was at fault?
No. It records what happened and who said what, which insurers then weigh. An infringement notice against a driver is close to decisive in practice, but the civil liability call belongs to the insurers and, ultimately, a court.
I said sorry at the scene. Have I admitted fault?
A reflexive apology isn't a legal admission and insurers know it. Liability is assessed on evidence, not manners. Stop volunteering fault statements from now, give factual accounts only, and let the evidence speak.
What does a 50/50 decision mean for my costs?
Each side recovers half its losses from the other, and your own claim history usually records an at-fault component. Before accepting any split, have the evidence reviewed: we do this as a matter of course, because a 50/50 that should be 80/20 costs you real money.
About this guide: general information for NSW drivers, prepared by the Crash Assist team, not legal, financial or insurance advice. Accidents turn on their facts; for an answer specific to yours, get in touch, it costs nothing to ask.