Who decides the fault percentage?

In a settlement, the parties negotiate it; if a case goes further, a jury does. Evidence drives both.

Can an insurer just declare I was 30% at fault?

An adjuster can propose a percentage; it isn't final. It's reasonable to ask what evidence it rests on.

Does partial fault affect the property damage claim too?

Yes — comparative fault applies to the claim as a whole.

What if the other driver was uninsured and I was partly at fault?

A UM claim on your own policy is still subject to comparative fault; the reduction applies the same way.

FREE TOOL · NOTHING STORED

Arizona Comparative Fault Calculator

Arizona follows pure comparative negligence: a claimant's share of fault reduces the recovery by that percentage and does not eliminate it, at any percentage. If an insurer suggests you were partly at fault, this tool shows what that would mean in dollars — and why the percentage is worth contesting with evidence.

This tool provides general information only. It is not legal advice and does not create an attorney-client relationship. It runs entirely in your browser — nothing you enter is stored or sent anywhere.

Total damages (medical bills, lost income, property, other)Fault percentage assigned to you

Result

Reduced recovery: $0
Amount attributed to your share: $0

At 0% fault, the claim is reduced, not eliminated. Arizona does not bar recovery at 50% or 51% the way some states do.

The percentage is a fact question. Evidence preserved early — footage, photographs, witness statements — is what supports or challenges it.

How this works

Under Arizona's pure comparative negligence rule, fault is apportioned among the parties and each party's recovery is reduced by their own share. This tool applies that arithmetic to the numbers you enter.

Frequently asked questions

Talk it through with a lawyer

Free consultation, any hour, in English or Spanish.

Call (602) 217-0000