Pure comparative negligence, created entirely by the courts
California applies a pure comparative fault standard: a claimant's own fault reduces their recovery proportionally, but never bars it outright, even at a very high fault percentage. What makes California genuinely distinctive is how this rule came to exist. Unlike most other pure comparative states, California has no statute that establishes comparative negligence. The entire system rests on a single state Supreme Court decision, Li v. Yellow Cab Co., 13 Cal.3d 804 (1975).
What Li v. Yellow Cab Co. actually did
The case arose from a routine intersection collision where both drivers were found negligent. Under the old contributory negligence rule then in effect, the trial court held that the plaintiff's own negligence — however slight compared to the defendant's — barred any recovery at all. On appeal, the California Supreme Court found this all-or-nothing result fundamentally unjust and abolished contributory negligence as a complete bar, adopting pure comparative negligence instead. Notably, the court held that Civil Code § 1714, which had been read as codifying the old all-or-nothing approach, did not actually prevent the court from making this change judicially.
Why the missing statute genuinely matters
In most other pure comparative states — Alaska and Arizona among them — the courts' early adoption of comparative fault was eventually followed by a statute formally codifying the rule. California's legislature never took that step. More than fifty years after Li, California's comparative negligence system still rests entirely on judicial precedent rather than statutory law. In practical terms this makes very little difference day to day — the rule is firmly settled — but it means the ultimate source of the rule is the California Supreme Court's own reasoning, not an act of the legislature that would require a new law to undo.
How the reduction actually works
A claimant found 70% at fault for their own injury still recovers the remaining 30% of their damages. There is no percentage threshold anywhere in California's rule where the claimant's own fault suddenly eliminates the claim — the reduction is purely proportional, all the way up to 99% fault.
Why fault still matters enormously despite this
Because California never fully eliminates a claim over the claimant's own fault, insurers instead focus on pushing the fault percentage as high as possible, since every additional point reduces the payout directly. See our guide to how adjusters build a fault argument in California for what that negotiation looks like in practice.