Your hit-and-run UM claim in Arizona survives any fault assignment because the state follows pure comparative fault. The recovery decreases by your share but never disappears entirely.
How Pure Comparative Fault Shapes Your Hit-and-Run UM Claim
Pure comparative fault states allow hit-and-run UM claims to proceed at any fault level. The insurer cannot deny your claim outright based on shared blame -- it can only reduce the payout proportionally. This protection matters because in a hit-and-run, the fleeing driver leaves a gap in the evidence record. Your insurer may fill that gap with assumptions that inflate your fault share. If you were driving five miles over the speed limit when a phantom driver ran a red light and struck you, pure comparative fault means you still recover -- but the insurer will argue for a fault percentage that reflects the speeding. The higher it goes, the less the carrier pays.
Keeping Your Fault Share Low in a Pure Comparative Fault UM Claim
Your insurer may not be able to deny a hit-and-run UM claim under pure comparative fault, but it can significantly reduce the payout by attributing a high fault share to you. Fight that by controlling the evidence. Preserve dashcam recordings if they exist. Photograph the scene from multiple angles. Note the status of traffic lights, the speed limit, and weather conditions. Collect witness contact information before leaving the scene. When you speak with the insurer's adjuster, describe facts -- not opinions about what might have happened. Every admission, even a casual one, can be used to justify adding percentage points to your fault share.
A worked example with Arizona’s rule applied
Take a hit and run claim with documented losses like these:
| Medical bills | $11,700 |
| Lost wages | $9,600 |
| Other out-of-pocket costs | $2,400 |
| Pain and suffering (2.0× medical) | $23,400 |
| Gross value before fault | $47,100 |
Now apply Arizona’s pure comparative rule. Say the insurer pins 30% of the fault on you: the claim is reduced by $14,130 to $32,970 — but it survives. Even a driver found 30% at fault still recovers the remaining share here, which is exactly why adjusters in pure-comparative states argue percentages rather than trying to kill the claim outright.
Filing a UM Claim After a Hit and Run: What Your Insurer Will Not Tell You
When the at-fault driver flees, your own UM coverage becomes the claim path -- and your insurer becomes the opposing party. The carrier reviews your demand, evaluates your damages, and decides what to pay. It does this while also holding the power to assign fault to you, which directly reduces the payout in Arizona. This dual role -- both your coverage provider and your adversary -- means you should approach the claim with the same level of preparation you would bring to a dispute with a stranger's insurer. Complete medical records, wage-loss proof, and a well-documented crash narrative are the foundation. An attorney experienced in UM disputes can level the negotiating dynamic.
Before you rely on any number here
This page is general information, not legal advice. Nothing on hitandrunlawyer.us creates an attorney–client relationship, and no estimate produced by the calculator is a valuation, a prediction or an offer.
HitAndRunLawyer.us is an independent informational website operated by Mustafa Bilgic, an individual who is not a licensed attorney and does not run a law firm. We do not accept cases, review documents, negotiate with insurers or refer you to a particular lawyer.
Deadlines, fault rules, damage caps and insurance requirements differ by state and change over time, and a missed deadline can end a valid claim permanently. Consult a licensed attorney in your state before you accept, reject or file anything. To find one independently, use your state bar’s referral service or the American Bar Association’s Find Legal Help directory.
Questions
Arizona questions
Can my UM insurer deny my hit-and-run claim entirely under Arizona's fault rule?
No. Arizona follows pure comparative fault, which means no fault percentage can eliminate your UM claim. The insurer reduces your payout by the percentage of fault it attributes to you, but the claim itself survives at every level. Your focus should be on minimizing the assigned percentage.
How does fault reduce my hit-and-run UM payout in Arizona?
The insurer multiplies your total damages by your fault percentage and subtracts that amount from the award. If the insurer assigns you 20 percent fault, you receive 80 percent of the total. Each additional point of fault directly reduces the final payout, which is why controlling the fault narrative through evidence matters.
What evidence lowers my fault share in a Arizona hit-and-run UM claim?
Dashcam footage, scene photographs, and witness statements that show lawful driving on your part are the strongest tools. Physical evidence like impact angles and tire marks can establish the phantom driver's conduct. Review the police report for errors before the insurer relies on it to assign a higher fault percentage to you.
- Sources: state comparative-fault statutes · Insurance Information Institute · Bureau of Labor Statistics · IRS Pub. 4345 · NHTSA
- Last reviewed 2026-08-25. Statutes, caps and fault rules change — re-check anything time-sensitive with a licensed attorney.