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Injury claims · treatment, liens and value

Auto Injury Claim Fault Rules by State

Your injury documentation — diagnostic imaging, treatment notes, therapy records — establishes what your auto accident claim is worth. But the state where the crash happened determines how much of that value survives if both drivers share fault. Five distinct fault systems operate across the country. Each one treats your share of blame differently, and some can erase your compensation entirely.

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Enter documented losses to see an informational value range built with the multiplier method insurance adjusters commonly apply, adjusted for your state’s fault rule. It runs entirely in your browser.

Injury severity Minor2.0×Catastrophic  
Your share of the fault 0%0%100%
Case factors

Informational estimate

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Fill in the form to see a likely range.

Pain & sufferingMedicalLost wagesOther costs
  • Medical & future care$0
  • Lost wages$0
  • Property & out-of-pocket$0
  • Pain & suffering $0
  • Comparative fault reduction$0
  • Gross estimate$0
  • Less contingency fee (33.3%)$0
  • Illustrative net to you$0

Medical liens, health-insurance subrogation, case costs and taxes on some damage categories are not modelled here.

This is not a valuation, an offer or legal advice. Real settlement value turns on evidence, causation, venue, insurance limits, liens and negotiation. Verify every figure with a licensed attorney in your state before you accept or reject anything.

Five Fault Rules That Control Auto Injury Claims

Each state assigns fault in auto injury cases using one of five systems. The differences between them determine whether your medical documentation translates into compensation or becomes irrelevant when fault is shared.

  • Contributory negligence — any fault on your part, however small, bars your entire claim. Five jurisdictions follow this rule.
  • Pure comparative fault — your recovery is reduced by your fault percentage but never eliminated, even at ninety-nine percent fault.
  • Modified comparative (fifty-percent bar) — your claim is barred if your fault reaches fifty percent.
  • Modified comparative (fifty-one-percent bar) — your claim is barred if your fault reaches fifty-one percent.
  • Slight-gross (South Dakota only) — you recover only if your negligence was 'slight' compared to the other driver's 'gross' negligence.

Your Injury Documentation Across Fault Systems

Your treatment records — diagnostic imaging, physician notes, therapy progress, prescription history — establish the dollar value of your auto injury claim. That value serves as the starting point in every fault system. In pure comparative states, fault reduces it proportionally. In modified comparative states, fault near the threshold can erase it entirely. In contributory negligence states, any fault eliminates it.

Across all five systems, the strength of your medical documentation sets the ceiling for recovery. And across all five, the insurer's fault-shifting strategy is the primary threat to that ceiling. Understanding which system your state uses — and building your injury file with that system's pressure points in mind — is the first step toward protecting your compensation.

Contributory negligence — any fault can bar the claim

Slight/gross negligence

Modified comparative — barred at 50%

Modified comparative — barred at 51%

Pure comparative — reduced, never barred

Before you rely on any number here

Legal notice

This page is general information, not legal advice. Nothing on autoinjuryattorney.us creates an attorney–client relationship, and no estimate produced by the calculator is a valuation, a prediction or an offer.

AutoInjuryAttorney.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

Fault-rule questions

What is the difference between a fifty-percent and fifty-one-percent fault bar?

Under a fifty-one-percent bar, you retain your claim at exactly fifty percent fault — one percentage point of additional room compared to a fifty-percent bar state. At fifty-one percent or above, your claim is barred. This narrow difference can be decisive in closely contested fault cases.

Does my fault percentage reduce my medical expense recovery in your state?

Yes. Under pure comparative fault, your documented medical expenses and other damages are reduced by your assigned fault share. If your fault is thirty percent, you recover seventy percent of the total. No threshold blocks your claim, but higher fault means a proportionally smaller recovery.

What happens to my injury claim if I am found even slightly at fault in your state?

Under contributory negligence, any fault on your part — even one percent — eliminates your right to recover compensation. Your medical records and treatment costs become legally uncollectable. This is why crash evidence proving the other driver's sole responsibility is essential alongside your injury documentation.

MB
Written and maintained by
Mustafa Bilgic — independent operator, AutoInjuryAttorney.us

Not an attorney. This page summarises publicly available law, agency data and insurance-industry practice; it is not a substitute for advice about your own claim.

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