Last reviewed: October 2026 · How we research: How We Research
Many accidents aren’t entirely one person’s fault. A driver runs a red light, but the other driver was a few miles over the limit. A store leaves a spill on the floor, but the shopper was looking at their phone. When both sides share responsibility, the law of your state decides what happens to the injured person’s claim, and the difference between states is dramatic. The same injury and the same 40% share of fault can mean a reduced payout in one state and nothing at all in another.
This guide explains the four systems used in the United States, lets you calculate how your state’s rule would affect your claim, and lists the rule for all 50 states and Washington, D.C.
The four fault systems
Pure comparative fault
You can recover even if you were mostly to blame, minus your share. 99% at fault still means 1% of your damages. Used in about nine states, including California, Washington and Arizona.
Modified: 51% bar
You recover, reduced by your share, as long as you were not more than 50% at fault. At exactly 50% you can still recover half. The most common rule, used in over 20 states including Texas, Pennsylvania, Illinois and Florida.
Modified: 50% bar
Like the 51% rule, but you are barred if you are 50% or more at fault. An even split means nothing. Used in about 11 states, including Georgia, Colorado and Tennessee.
Contributory negligence
The harshest rule: if you were even slightly at fault, you may recover nothing. Still used in Alabama, Maryland, North Carolina, Virginia and Washington, D.C.
A few states don’t fit neatly. South Dakota uses a “slight/gross” rule, allowing recovery only if your negligence was slight in comparison with the defendant’s. Michigan reduces all damages by your share, but bars non-economic damages such as pain and suffering if you were more than 50% at fault. And two states changed their rules recently: Florida moved from pure comparative fault to a 51% bar in 2023, and Louisiana did the same for accidents from January 1, 2026. New York, long a pure comparative fault state, adopted a 51% bar for certain motor vehicle cases in 2026.
Calculate how fault affects your claim
Choose your state, enter your share of fault and your damages. Split damages into economic losses (medical bills, lost wages) and non-economic losses (pain and suffering), since Michigan treats them differently.
Shared fault calculator
Simplified illustration of general negligence rules as of October 2026. Some claim types (for example medical malpractice, product liability or claims against government) can follow different rules.
Fault rules in all 50 states and D.C.
| State | Fault rule | What it means |
|---|---|---|
| Alabama | Contributory negligence | Any fault can bar recovery |
| Alaska | Pure comparative | Recover at any fault level, reduced by your share |
| Arizona | Pure comparative | Recover at any fault level, reduced by your share |
| Arkansas | Modified (50% bar) | Barred at 50% or more |
| California | Pure comparative | Recover at any fault level, reduced by your share |
| Colorado | Modified (50% bar) | Barred at 50% or more |
| Connecticut | Modified (51% bar) | Barred above 50% |
| Delaware | Modified (51% bar) | Barred above 50% |
| District of Columbia | Contributory negligence | Any fault can bar recovery |
| Florida | Modified (51% bar) | Modified 51% bar for negligence cases filed on or after March 24, 2023 (previously pure comparative). Medical malpractice cases are excluded. |
| Georgia | Modified (50% bar) | Barred at 50% or more |
| Hawaii | Modified (51% bar) | Barred above 50% |
| Idaho | Modified (50% bar) | Barred at 50% or more |
| Illinois | Modified (51% bar) | Barred above 50% |
| Indiana | Modified (51% bar) | Barred above 50% |
| Iowa | Modified (51% bar) | Barred above 50% |
| Kansas | Modified (50% bar) | Barred at 50% or more |
| Kentucky | Pure comparative | Recover at any fault level, reduced by your share |
| Louisiana | Modified (51% bar) | Modified 51% bar for accidents on or after January 1, 2026 (HB 431); pure comparative fault for earlier accidents. |
| Maine | Modified (50% bar) | Barred at 50% or more |
| Maryland | Contributory negligence | Any fault can bar recovery |
| Massachusetts | Modified (51% bar) | Barred above 50% |
| Michigan | Modified (Michigan rule) | Pure comparative for economic damages, but no non-economic damages (pain and suffering) if you are more than 50% at fault. |
| Minnesota | Modified (51% bar) | Barred above 50% |
| Mississippi | Pure comparative | Recover at any fault level, reduced by your share |
| Missouri | Pure comparative | Recover at any fault level, reduced by your share |
| Montana | Modified (51% bar) | Barred above 50% |
| Nebraska | Modified (50% bar) | Barred at 50% or more |
| Nevada | Modified (51% bar) | Barred above 50% |
| New Hampshire | Modified (51% bar) | Barred above 50% |
| New Jersey | Modified (51% bar) | Barred above 50% |
| New Mexico | Pure comparative | Recover at any fault level, reduced by your share |
| New York | Pure comparative (2026 motor vehicle change) | Pure comparative fault generally; a 2026 change applies a modified 51% bar to certain motor vehicle cases commenced after the law took effect. Check how it applies to your case. |
| North Carolina | Contributory negligence | Any fault can bar recovery |
| North Dakota | Modified (50% bar) | Barred at 50% or more |
| Ohio | Modified (51% bar) | Barred above 50% |
| Oklahoma | Modified (51% bar) | Barred above 50% |
| Oregon | Modified (51% bar) | Barred above 50% |
| Pennsylvania | Modified (51% bar) | Barred above 50% |
| Rhode Island | Pure comparative | Recover at any fault level, reduced by your share |
| South Carolina | Modified (51% bar) | Barred above 50% |
| South Dakota | Slight/gross negligence | Slight/gross negligence rule: you can recover only if your negligence was “slight” compared with the defendant’s, and damages are reduced. |
| Tennessee | Modified (50% bar) | Barred at 50% or more |
| Texas | Modified (51% bar) | Barred above 50% |
| Utah | Modified (50% bar) | Barred at 50% or more |
| Vermont | Modified (51% bar) | Barred above 50% |
| Virginia | Contributory negligence | Any fault can bar recovery |
| Washington | Pure comparative | Recover at any fault level, reduced by your share |
| West Virginia | Modified (50% bar) | Barred at 50% or more |
| Wisconsin | Modified (51% bar) | Barred above 50% |
| Wyoming | Modified (51% bar) | Barred above 50% |
Comparative and contributory negligence rules for general personal injury claims in all 50 states and D.C. Last reviewed October 2026. Special rules can apply to certain claim types.
How fault percentages are decided
There’s no formula. In most claims, fault is first argued over by insurance adjusters during negotiation, using the police report, photos, witness statements, traffic laws and the physical evidence. If the case goes to trial, a jury (or a judge) decides the percentages. Insurers often open with a high figure for the injured person’s share, because every percentage point reduces what they pay, and in contributory negligence states, any fault at all can end the claim. That is why evidence about how the accident happened matters so much, even when your injuries are clear.
Common arguments used to assign fault to injured people include speeding or following too closely, distraction, failing to wear a seat belt (which some states allow as evidence of fault for your injuries and others don’t), crossing outside a crosswalk, riding without lights, or ignoring an obvious hazard. For examples in specific situations, see our guides to rear-end collisions, slip and fall negligence and pedestrian accidents.
When more than one party is at fault
Fault can be split among several defendants as well as the injured person, for example two drivers in a three-car crash, or a driver and a road contractor. States also differ on joint and several liability: whether you can collect the full amount from any one defendant, or only each defendant’s own share. In states with several liability only, if one at-fault party has no insurance, you may not be able to recover their share from the others. In modified comparative fault states, your share is usually compared with the combined fault of all defendants, though the details vary.
How to protect yourself against fault arguments
- Don’t admit fault at the scene or to the other side’s insurer. Stick to the facts.
- Collect evidence early: photos, dashcam or security video, witness names and the police report.
- Avoid recorded statements to the other insurer without advice; questions are often aimed at establishing your share of fault.
- Know your state’s rule. In 50% and 51% bar states, the difference between 49% and 51% can be the whole claim. In contributory negligence states, get legal advice early.
- Watch your deadline; see the statute of limitations by state.
Frequently asked questions
What’s the difference between comparative and contributory negligence?
Under comparative negligence, your compensation is reduced by your share of fault, and in modified systems barred only above a threshold. Under contributory negligence, used in only five jurisdictions, any fault on your part can bar recovery entirely, subject to narrow exceptions such as the “last clear chance” doctrine.
Which state’s rule applies if the accident happened while I was traveling?
Usually the law of the state where the accident happened, though choice-of-law rules can be complicated when the people involved live in different states. A lawyer licensed where the accident occurred can confirm.
Does shared fault affect a no-fault PIP claim?
Generally no. Personal injury protection in no-fault states pays regardless of fault. Fault rules matter for the separate liability claim against the at-fault driver, including pain and suffering.
Can my share of fault change during negotiation?
Yes. Fault percentages are often negotiated. New evidence, such as video or a witness, can shift them significantly, and the risk of a jury deciding differently is part of what drives settlement offers. See how fault fits into the overall value in the car accident settlement calculator.
Sources
- Cornell Law School, Legal Information Institute: Comparative negligence
- Cornell Law School, Legal Information Institute: Contributory negligence
- Texas Civil Practice and Remedies Code, Chapter 33 (proportionate responsibility)
- Florida Statutes § 768.81 (comparative fault, as amended in 2023)
This guide is general information, not legal advice. Fault rules have exceptions and change over time, and special rules may apply to particular claim types. Consult a personal injury lawyer licensed in your state.