Four systems, and California sits at one extreme
American fault law splits into four real categories: pure comparative negligence, modified comparative negligence with a 50% bar, modified comparative negligence with a 51% bar, and pure contributory negligence. California sits at the most forgiving end — pure comparative negligence — while a small handful of states sit at the opposite, strictest end.
Pure comparative negligence: California's rule
Under Li v. Yellow Cab Co. (1975), an injured person's own fault reduces their recovery by their exact percentage of fault, with absolutely no cutoff point. A claimant found 80% at fault still recovers the remaining 20% of their damages, all the way up to 99% fault.
Modified comparative negligence: a threshold California doesn't have
Most US states instead use a modified version: recovery is allowed, reduced by the claimant's fault percentage, but only up to a point, typically 50% or 51%. California has no equivalent threshold built into its rule at all.
What genuinely sets California apart from its pure comparative peers
Here's the detail worth understanding precisely. Most other pure comparative states — including Alaska, where the courts adopted the rule first in 1975 too — eventually saw their legislature formally codify comparative negligence into statute. California's legislature never has. Decades after Li v. Yellow Cab Co., California's entire comparative negligence system still rests on that single judicial decision, with no comparative-negligence-specific statute ever enacted to back it up.
Contributory negligence: the opposite extreme
At the far other end sit the five contributory negligence jurisdictions — Alabama, Maryland, North Carolina, Virginia, and the District of Columbia — where any fault at all on the claimant's part, even 1%, can bar recovery completely. California's rule produces the exact opposite outcome in the same scenario: a claimant 1% at fault in California still recovers 99% of their damages. See our guide to the other states using pure comparative negligence for where California's approach fits among its peers nationally.