Free tool
Fault & compensation estimator
When both drivers share blame, states handle it in four different ways. Enter your state, the total damages and your estimated share of fault to see the difference.
Illustration only. Real cases involve disputed fault percentages, insurance policy limits, damage caps, multiple defendants and special rules (for example, in no-fault states injury claims may first go through your own PIP coverage).
By Serdar Arslan, editor · Last reviewed · How we research
The four fault systems
| Rule | If you are 30% at fault on $100,000 | If you are 60% at fault |
|---|---|---|
| Pure comparative | $70,000 | $40,000 |
| Modified – 51% bar | $70,000 | $0 |
| Modified – 50% bar | $70,000 | $0 |
| Contributory negligence | $0 | $0 |
The two modified rules differ only at exactly 50%: under a 51% bar a driver who is 50% at fault can still recover half; under a 50% bar they recover nothing.
Who decides the percentages?
In practice, insurance adjusters assign fault first, using the crash report, photos, witness statements and traffic laws. If the case goes to trial, a jury or judge decides. Percentages are often the most negotiated part of a claim, which is why evidence matters. See our evidence checklist.
What counts as "damages"?
Economic losses (medical bills, lost wages, repair costs) plus non-economic losses such as pain and suffering. Some states cap certain damages, and in no-fault states you may need to meet an injury threshold before suing for pain and suffering. Learn more in comparative fault explained and pain and suffering damages.
Frequently asked questions
›What is comparative fault?
A rule that reduces your compensation by your share of blame for the crash. Some states bar recovery entirely once your share reaches 50% or 51%.
›Example: $100,000 in damages and 30% at fault?
Under pure comparative or either modified rule you would recover about $70,000. Under contributory negligence you could recover nothing.
›Which states use contributory negligence?
Alabama, Maryland, North Carolina and Virginia, plus Washington, D.C. Any fault by the injured person can bar recovery, with narrow exceptions.
›Who decides my percentage of fault?
Insurance adjusters propose it first; if the case goes to trial, a jury or judge decides. Evidence like photos, witnesses and the crash report matters.
›Does this apply in no-fault states?
No-fault rules mainly affect who pays medical bills first. Fault rules still apply when an injury is serious enough to sue the other driver.