Comparative Negligence Across the U.S. — A State-by-State Guide

The fault rule that applies in your case can be the difference between a meaningful recovery and zero recovery. A plaintiff who is 51% at fault wins nothing in Pennsylvania, recovers 49% in California, and is barred from suit altogether in Maryland. Same facts, three different outcomes.

This guide walks through the four fault doctrines used in U.S. personal injury practice, which states apply each, and the practical implications for case selection at intake.

The four doctrines

1. Pure contributory negligence

The harshest doctrine. Any contributory fault by the plaintiff completely bars recovery — even 1%. If you can prove the plaintiff did anything to contribute to the harm, the case dies.

States that still apply pure contributory negligence: Alabama, Maryland, North Carolina, Virginia, and Washington D.C.

For plaintiff firms in these jurisdictions, intake screening for plaintiff fault has to be unusually rigorous. A plaintiff who looked at their phone for two seconds before the impact may not have a viable case.

2. Pure comparative negligence

The most plaintiff-friendly doctrine. The plaintiff recovers damages reduced by their percentage of fault — even if 99% at fault. A 90%-at-fault plaintiff with $100K in damages recovers $10K.

States that apply pure comparative negligence: Alaska, Arizona, California, Florida (pre-2023), Kentucky, Louisiana, Mississippi, Missouri, New Mexico, New York, Rhode Island, South Dakota, Washington.

Pure comparative makes shared-fault cases much more economical. Even cases with significant plaintiff fault are worth pursuing if damages are large enough.

3. Modified comparative — 50% rule

The plaintiff is barred if their fault equals or exceeds 50%. At 49% they recover 51% of damages; at 50% they recover nothing.

States that apply the 50% rule: Arkansas, Colorado, Florida (post-2023 reform), Georgia, Idaho, Kansas, Maine, Nebraska, North Dakota, Oklahoma, Tennessee, Utah, West Virginia.

The 50% cliff matters enormously in close-call cases. A jury that's torn between 45% and 55% fault for the plaintiff produces dramatically different verdicts depending on which side of 50% they land.

4. Modified comparative — 51% rule

The plaintiff is barred if their fault is more than 50%. At exactly 50% they still recover (50% of damages).

States that apply the 51% rule: Connecticut, Delaware, Hawaii, Illinois, Indiana, Iowa, Massachusetts, Michigan, Minnesota, Montana, Nevada, New Hampshire, New Jersey, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Vermont, Wisconsin, Wyoming.

This is the most common modified-comparative variant. The "more than 50%" wording gives the plaintiff a small but real advantage at the 50/50 split.

Why this matters at intake

The fault rule changes case selection in four practical ways:

Sole-fault cases — Liability is clear, plaintiff is essentially zero fault. These are viable everywhere. Standard analysis.

Close-call shared fault — Both parties contributed; reasonable disagreement about percentages. In contributory states, decline. In pure comparative states, accept and let comparable verdicts inform settlement value. In modified states, the cliff (50% or 51%) determines whether the case is on or off.

Heavy plaintiff fault — Plaintiff is clearly more than half at fault. Dead in modified and contributory states; potentially still viable in pure comparative if damages are catastrophic.

Catastrophic damages with shared fault — Pure comparative states are uniquely suited for cases where plaintiff fault exists but damages are so large that even reduced recovery is worth pursuing. A plaintiff 70% at fault in a $5M-damages case still walks away with $1.5M.

Common intake mistakes

1. Assuming "your state's rule" without checking — Some firms assume modified 51% because that's most common nationwide. Check your specific state's rule before signing.

2. Ignoring jurisdictional variance for multi-state cases — A car accident might involve a New Jersey resident, a New York defendant, and a collision in Pennsylvania. Choice-of-law analysis matters.

3. Skipping plaintiff-fault analysis on slam-dunk-looking cases — Even rear-end collisions can have plaintiff-fault arguments (sudden lane change, brake-checking, contributory speed). Screen for it before pricing the case.

4. Letting the AI pick a tier without state context — Generic "case strength score" tools that don't load state rules will misvalue cases in restrictive states (contributory, modified 50%) and undervalue them in permissive states (pure comparative).

How Valryn handles it

When a case enters Valryn, the scoring engine loads the fault rule for the relevant state automatically — including 2023 reforms (like Florida moving from pure comparative to modified 50%). Cases with shared-fault risk in restrictive states are flagged for senior review before signing; cases with shared fault in pure comparative states are scored against comparable verdicts where partial fault was found.

See how case scoring works → Browse comparative negligence rules in the glossary →

The bottom line

Comparative negligence rules are the silent filter on case viability. Plaintiff firms that build intake processes around the specific rule applying in their venues — and that handle the multi-state cases differently — make better case-selection decisions than firms running a one-size-fits-all triage.