A common concern among riders after a crash is: "What if I was partially at fault — does that mean I can't recover anything?" In California, the answer is generally no, thanks to a legal principle called pure comparative negligence.
What "pure comparative negligence" means
California follows a pure comparative negligence rule, established by the California Supreme Court in Li v. Yellow Cab Co. (1975). Under this rule, a person who is partially at fault for an accident can still recover compensation, with the amount typically reduced in proportion to their percentage of fault.
For example, in a simplified illustration: if a rider is found 20% at fault and total damages are calculated at $100,000, the rider's recovery would generally be reduced to $80,000 to reflect their share of responsibility. This is true no matter how high the rider's fault percentage is, though practically such claims are rare at very high fault percentages, and the costs of pursuing one may not justify it.
How this differs from other states
Some states use "modified" comparative negligence, which bars recovery entirely once a person's fault crosses a certain threshold (commonly 50% or 51%). California's "pure" version doesn't have that cutoff — fault simply reduces the recovery proportionally, regardless of where the percentage lands.
How fault percentages get determined
There's no fixed formula. Fault is typically assessed by looking at the specific facts: traffic law violations, right-of-way, speed, visibility, road conditions, and witness or physical evidence. In a contested claim, an insurance adjuster, and ultimately a judge or jury if litigation occurs, makes this determination based on the evidence presented.
This is inherently fact-specific — two seemingly similar accidents can result in very different fault allocations depending on details that might seem minor at first glance.
Why this matters for motorcyclists specifically
Riders sometimes face an uphill battle with fault perception, since some adjusters and jurors may carry assumptions about motorcyclists' behavior (speed, lane splitting, perceived recklessness) that aren't necessarily accurate for the specific crash in question. Thorough documentation — photos, witness statements, and an official police report — helps establish the actual facts rather than relying on assumptions.
What this means practically
If an insurer or the other party suggests you share some fault, that's not necessarily the end of your claim. It may simply affect the amount, not whether you have a claim at all. Because fault determinations are detailed and fact-dependent, this is a good area to discuss directly with a licensed California attorney if you're navigating a disputed claim.