California Car Accident Laws Every Driver Needs to Know

California's traffic and tort laws are not intuitive. They evolved over a century through legislation, landmark cases, and Insurance Code amendments — and the rules that decide your claim were almost certainly written long before your crash. Knowing them is the difference between a closed file and a fair recovery.

California is a pure comparative negligence state, a rule established by the Supreme Court in Li v. Yellow Cab Co. (1975) 13 Cal.3d 804. Pure comparative fault means an injured plaintiff can recover damages even if they are 99 percent at fault — the recovery is simply reduced by their percentage of fault. This is one of the most plaintiff-friendly negligence rules in the country and stands in sharp contrast to the 50- and 51-percent bar rules used by most states. CACI 405 is the jury instruction that operationalizes it.

Every driver in California must carry minimum liability insurance under Insurance Code § 11580.1b: $15,000 per person for bodily injury, $30,000 per accident for bodily injury, and $5,000 for property damage — commonly written as 15/30/5. Those limits have not been updated since 1967 and are dangerously low. A single ER visit can exceed $15,000 before a single image is taken. Underinsured motorist (UIM) coverage on your own policy is the only realistic backstop, and California's uninsured/underinsured motorist statute (Insurance Code § 11580.2) requires every auto insurer to offer it — many drivers waive it without understanding what they are giving up.

California also imposes affirmative duties at and after a crash. Vehicle Code § 20001 makes it a felony to leave the scene of an injury accident; § 20002 makes it a misdemeanor to leave the scene of a property-damage accident without identifying yourself. Drivers must file an SR-1 report with the DMV within 10 days of any accident involving injury, death, or property damage over $1,000 — a duty that exists independently of any police report and applies even when the crash is your fault.

Time limits are unforgiving. The statute of limitations for personal injury is two years from the date of the accident under California Code of Civil Procedure § 335.1. Property damage is three years under CCP § 338. If a public entity is involved — a city bus, a government employee, a road defect — a written claim must be filed within six months under Government Claims Act § 911.2, and litigation must follow within six months of the agency's denial. Missing any of these deadlines almost always extinguishes the right to recover regardless of how serious the injury.

Distracted driving and California's hands-free laws

Vehicle Code § 23123 and § 23123.5 make it illegal to hold a cellphone while driving or to use any electronic device that is not configured for hands-free or voice-operated use. AB 1785, in effect since 2017, broadened the prohibition to cover virtually any handheld manipulation of an electronic device. A citation under either section is admissible evidence of negligence per se under Evidence Code § 669, and many distracted-driving cases are won by subpoenaing the at-fault driver's cellular records.

DUI, dram shop, and punitive damages

Vehicle Code § 23152 sets California's BAC limits at 0.08 percent for adult drivers, 0.04 percent for commercial drivers, and 0.01 percent for drivers under 21. A DUI by the at-fault driver typically supports punitive damages under Taylor v. Superior Court (1979) 24 Cal.3d 890, which can substantially increase recovery beyond compensatory damages. California's commercial host liability under Business & Professions Code § 25602.1 is narrow — generally limited to obviously intoxicated minors — so the deep pocket in most DUI crashes remains the driver and any available insurance.

Right-of-way, lane changes, and rear-end presumptions

California Vehicle Code §§ 21800–21809 codify right-of-way rules at intersections, uncontrolled junctions, and yield signs. Section 22107 requires safe lane changes with signal. Section 21703 establishes the assured-clear-distance rule that underpins rear-end collision liability — the driver in the rear is presumptively at fault for failing to maintain a safe following distance, though that presumption can be rebutted with evidence of sudden stops, brake-checking, or non-functioning brake lights.

• Pure comparative negligence under Li v. Yellow Cab Co. (1975) — recover even if 99% at fault.
• Mandatory minimum coverage of 15/30/5 under Insurance Code § 11580.1b — dangerously low.
• UIM coverage must be offered by every insurer under Insurance Code § 11580.2.
• SR-1 form due to DMV within 10 days of injury or $1,000+ property damage.
• Two-year statute of limitations for injury (CCP § 335.1); six months for government claims (Gov. Code § 911.2).
• Hands-free law (Veh. Code § 23123) supports negligence per se under Evidence Code § 669.

The 15/30/5 minimum is not a real safety net California's mandatory minimum coverage of $15,000 per person was set in 1967 and never indexed to inflation. A single ambulance ride and ER visit can blow through it before any treatment occurs. Underinsured motorist (UIM) coverage on your own policy — required to be offered under Insurance Code § 11580.2 — is the only meaningful protection, and waiving it is one of the most expensive financial decisions a California driver can make.

Related Article: The Evidence That Actually Proves Fault in a California Car Accident The statutes set the rules; the evidence wins the case. Read the full fault-evidence playbook at /articles/evidence-proving-fault-car-accident-california.

Related Article: Dealing With Insurance Adjusters After a California Car Accident Knowing the law is only useful if you know how the carrier will try to work around it. Read the adjuster-tactics guide at /articles/dealing-with-insurance-adjusters-california.

Frequently Asked Questions

Q: What is pure comparative negligence in California? A: Pure comparative negligence, adopted by the California Supreme Court in Li v. Yellow Cab Co. (1975), allows an injured plaintiff to recover damages even when they are partly — or mostly — at fault for the accident. The recovery is reduced by the plaintiff's percentage of fault. A plaintiff who is 30 percent at fault for a $100,000 injury recovers $70,000; a plaintiff 80 percent at fault recovers $20,000. There is no percentage bar to recovery, unlike most states.

Q: What is the minimum car insurance required in California? A: Under Insurance Code § 11580.1b, every driver must carry at least $15,000 per person and $30,000 per accident in bodily injury liability coverage, plus $5,000 in property damage liability — the 15/30/5 minimum. These limits have not been raised since 1967 and are widely considered inadequate for any serious injury claim. Most drivers should carry substantially higher limits and add uninsured/underinsured motorist coverage.

Q: How long do I have to file a car accident lawsuit in California? A: Two years from the date of the accident for personal injury claims under California Code of Civil Procedure § 335.1, and three years for property damage under CCP § 338. If a public entity is involved — a city vehicle, county road defect, or government employee — a written claim must be filed within six months under Government Code § 911.2. Missing any of these deadlines almost always extinguishes the right to recover.

Q: Do I have to report a car accident in California? A: Yes. An SR-1 form must be filed with the DMV within 10 days of any accident involving injury, death, or property damage exceeding $1,000 under Vehicle Code § 16000. This duty exists independently of any police report and applies regardless of fault. Failure to file can result in suspension of your driver's license under § 16004.

Q: What if the other driver does not have insurance? A: Your own uninsured motorist (UM) coverage — required to be offered by every auto insurer under Insurance Code § 11580.2 — steps in to pay damages up to your policy limits. If you waived UM coverage in writing, the only remaining options are pursuing the at-fault driver's personal assets (rarely productive) or evaluating whether any other liable parties or coverage layers apply. UM/UIM coverage is one of the cheapest and most important coverages on a California auto policy.

Q: Is California a no-fault state? A: No. California is a traditional fault-based tort state. The driver who caused the accident — and their liability insurer — is responsible for the resulting damages. This is fundamentally different from the dozen or so true no-fault states where each driver's own insurer pays regardless of fault. California's MedPay coverage is sometimes confused with no-fault, but it is optional first-party medical coverage layered on top of the fault system, not a substitute for it.

Q: Can I recover punitive damages for a California car accident? A: Yes, when the conduct rises beyond ordinary negligence to malice, oppression, or fraud as defined in Civil Code § 3294. DUI is the classic example — Taylor v. Superior Court (1979) confirmed that driving under the influence supports punitive damages. Street racing, intentional road-rage collisions, and conduct showing conscious disregard for the safety of others can also qualify. Punitive damages are uninsurable in California, so they create exposure beyond any policy limit.

Q: What is the hit-and-run law in California? A: Vehicle Code § 20001 makes it a felony to leave the scene of an accident involving injury or death. Section 20002 makes it a misdemeanor to leave the scene of a property-damage-only accident without identifying yourself and providing required information. Both sections support civil liability, and a hit-and-run also typically allows recovery under your own uninsured motorist coverage even when the offending driver is never identified.

Q: Does California require helmets, seat belts, or child seats? A: Yes to all three. Vehicle Code § 27315 requires seat belts for all occupants. Section 27360 requires children under 8 — or under 4'9" — to be in an appropriate child restraint, and children under 2 to be in a rear-facing seat. Section 27803 requires helmets for all motorcycle riders and passengers. Failure to comply does not bar recovery, but under Franklin v. Gibson (1982) and CACI 712, it can reduce damages through comparative fault if it contributed to the injuries.