California is a pure comparative negligence state: if you are partly at fault for your own injury, you can still recover money, but your compensation is reduced by your percentage of fault. Being blamed for part of a San Diego crash or fall does not end your claim.
Almost every week, someone tells me they did not call a lawyer because an adjuster said the accident was partly their fault. That assumption costs people real money. Under California law, partial fault reduces a recovery — it does not erase it. My name is Ronald B. Laba, and I have handled personal injury claims from my Vista office since 1991.
What pure comparative negligence means in California
California follows a rule called pure comparative negligence, adopted by the California Supreme Court in Li v. Yellow Cab Co. (1975). Under that rule, a jury assigns each party a percentage of responsibility for the harm, and the injured person's award is reduced by their own share.
The math is simple. If a jury values your damages at $100,000 and finds you 30% responsible, you recover $70,000. Unlike states that cut off recovery at 50% fault, California allows recovery even when the injured person carries most of the blame — a person found 80% at fault still recovers 20% of their damages.
The underlying duty comes from California Civil Code section 1714, which makes everyone responsible for injuries caused by their own lack of ordinary care. Comparative negligence is simply how the law divides that responsibility when more than one person was careless.
How fault percentages actually get decided
Fault is not decided by the insurance adjuster, even though the first phone call can make it feel that way. An adjuster's percentage is an opening position in a negotiation. The percentage that legally matters is the one a jury assigns — or the one the parties agree on in settlement knowing what a jury might do.
In the cases I handle, the evidence that moves those percentages tends to be ordinary and physical:
- The traffic collision report and any citations issued, which are persuasive but not binding on a jury
- Vehicle damage patterns and final resting positions
- Intersection, business, doorbell, and dashcam video, which is frequently overwritten within days
- Independent witnesses who have no stake in the outcome
- Maintenance logs, inspection sheets, and prior complaints in premises cases
- Medical records showing the mechanism of injury and when symptoms began
Common ways insurers try to shift fault onto you
The arguments repeat. In rear-end collisions, adjusters claim the front driver stopped suddenly or had non-functioning brake lights. In left-turn crashes, they argue the oncoming driver was speeding. In slip and fall claims, they argue the hazard was open and obvious, that footwear was inappropriate, or that a phone was distracting you. In pedestrian and cyclist claims, they raise crosswalk timing and clothing visibility.
None of these arguments are automatically wrong, and none of them are automatically right. Each one is a factual claim that has to be supported by evidence — which is why what you say in a recorded statement in the first week can matter for the rest of the case.
Comparative fault when several people share blame
Multi-vehicle pileups on I-5 and SR-78, and injuries on property with a landlord, a tenant, and a maintenance contractor, often involve several defendants. California splits how that works between two kinds of damages.
For economic damages — medical bills, lost earnings, out-of-pocket costs — defendants are jointly and severally liable, meaning any one of them can be pursued for the full economic loss. For non-economic damages such as pain and suffering, Proposition 51 (Civil Code section 1431.2) makes each defendant responsible only for its own percentage share.
That distinction changes strategy. It is one reason identifying every responsible party early matters more than it might seem, and why how a case is valued depends on who is in the case, not just how badly someone was hurt.
