1
Stop, secure the scene, and report as the law requires
California Vehicle Code requires drivers in a collision to stop, and to call 911 if anyone is injured or killed. Three reporting duties commonly apply: a law-enforcement or CHP traffic collision report; a DMV SR-1 filed within 10 days under Vehicle Code sections 16000–16002 if anyone was injured or killed or property damage exceeds $1,000 (a police report does not satisfy this, and missing it can lead to a license suspension); and prompt notice to your own insurer, even if you weren't at fault. If you're physically able, photograph the vehicles, road, skid marks, signals, and injuries; collect the other driver's name, license, plate, and insurance; get witness contacts; and note the time, weather, and location. Avoid apologizing or guessing about fault.
2
Get medical attention, even if you feel 'fine'
Adrenaline masks injuries — whiplash, concussions, and soft-tissue damage often surface hours or days later. See a doctor promptly and follow the treatment plan. Your health comes first, and a documented, consistent treatment record is the backbone of any injury claim. Large unexplained gaps in treatment are one of the first things an adjuster uses to argue your injuries weren't serious.
3
Understand the deadlines that govern your claim
Personal-injury lawsuits: generally two years from the date of injury under CCP section 335.1. Property damage: generally three years under CCP section 338. Claims against a government entity: usually a written government claim within six months under Government Code section 911.2 — long before the two-year deadline — and if the entity denies the claim, a shorter window (generally six months from the mailed denial) then applies. These are general rules with exceptions for minors, delayed discovery, and more; run your dates through the statute-of-limitations checker and confirm them with a licensed attorney.
4
Open the insurance claim(s)
Depending on fault and coverage, your claim may involve several policies: a third-party claim against the at-fault driver's liability insurer, and first-party claims under your own coverage — collision for vehicle damage, MedPay for medical bills regardless of fault, or uninsured/underinsured motorist (UM/UIM) coverage if the at-fault driver had no insurance or too little. When the adjuster calls, be careful: you're generally not required to give a recorded statement to the other driver's insurer, and doing so unprepared can hurt your claim.
5
Let the investigation establish fault
California uses pure comparative negligence. Each party is assigned a percentage of fault, and your recovery is reduced by your own share — but you can recover even if you were mostly at fault. If your damages are $100,000 and you're found 30% at fault, you'd recover $70,000. Adjusters and, ultimately, juries weigh the police report, photos, witness accounts, vehicle damage, and any traffic-law violations.
6
Finish treatment and reach maximum medical improvement
Resist the urge to settle quickly. You generally want to wait until you've reached maximum medical improvement (MMI) — the point where your condition has stabilized — or at least until your doctors can project your future care. Settle too early and you may discover that surgery or ongoing therapy isn't covered by the check you already cashed. A settlement is final; once you sign the release, you generally can't reopen it for the same crash.
7
Calculate damages and build the demand
Your losses are totaled into two categories. Economic damages: medical bills (past and future), lost wages and lost earning capacity, vehicle repair or replacement, and out-of-pocket costs. Non-economic damages: pain and suffering, emotional distress, and loss of enjoyment of life. These figures, plus the evidence of fault, go into a demand package sent to the insurer.
8
Negotiate the settlement
The insurer almost always responds to a demand with a lower counteroffer, and negotiation moves in rounds. Strong documentation, a clear liability picture, and a credible willingness to file suit all tend to push the number up. Many people retain a participating attorney at or before this stage precisely because settlement values are negotiated, not fixed.
9
File a lawsuit if the claim can't be resolved
If negotiations stall, or the deadline is approaching, a complaint is filed in California Superior Court. Filing doesn't mean a trial is inevitable — it opens discovery (exchanging evidence, depositions), often followed by mediation. Most filed cases still settle before a jury is ever seated.
10
Settle or go to trial, then resolve liens
When a number is agreed, you sign a release and the insurer issues payment. Before money reaches you, any medical liens (from health insurers, MedPay, or treating providers) typically must be paid or negotiated down out of the proceeds. If the case goes to trial instead, a judge or jury decides fault and damages.