California Personal Injury Statute of Limitations: The Deadlines That End Cases Before They Start

Two years. That’s the headline rule for most California personal injury cases, and the one number every injured person needs to know. It comes from Code of Civil Procedure § 335.1, the deadline that controls car accidents, motorcycle crashes, slip and falls, dog bites, premises liability, product liability brought as a negligence claim, and almost every other ordinary injury suit a Californian can bring. The clock starts on the date of the injury, runs every day after, and stops only when the plaintiff files a complaint in court. Settlement talks don’t stop it. Demand letters don’t stop it. Insurance company promises to “look at the file once we have everything” don’t stop it. A complaint, filed with the clerk and stamped, stops it. Nothing else does.

This page walks through the deadlines that actually decide whether a case lives or dies in California, including the special rules that bury more good claims than any other procedural issue: the six-month government-claim deadline, the dual-track one-year/three-year framework for medical malpractice, the delayed discovery rule and the narrow circumstances in which it actually helps, and the small set of situations that toll (pause) the clock.

The two-year rule under § 335.1

Code of Civil Procedure § 335.1 was enacted by SB 688 in 2002 and took effect January 1, 2003. Before that, California gave injury victims only one year. The two-year rule applies to “an action for assault, battery, or injury to, or for the death of, an individual caused by the wrongful act or neglect of another.” That phrasing covers essentially every negligence-based injury suit. A few common scenarios it includes:

• Auto collisions — rear-end, head-on, T-bone, hit and run, multi-vehicle, rideshare, and commercial trucks.
• Pedestrian and bicycle accidents caused by a driver’s negligence.
• Slip, trip, and fall cases against private property owners, retail businesses, and landlords (premises liability theory).
• Dog bites under Civil Code § 3342’s strict liability statute.
• Product liability claims framed as negligence (strict-products theory has the same window).
• Negligence cases against private individuals, including assault and battery causing physical injury.

The clock starts the moment the injury accrues — almost always the day of the accident. The deadline falls on the same calendar date two years later. If that date is a weekend or court holiday, the deadline rolls to the next court day under Code of Civil Procedure § 12a. Filing the complaint with the court clerk — not serving the defendant — stops the running. The plaintiff has 60 additional days after filing to complete service of process under Government Code § 583.210, and service relates back to the filing date.

Six months: the government claims trap

The single most common way a personal injury case dies before it begins is missing the six-month government-claim deadline. California’s Government Claims Act (Government Code §§ 905 et seq., 945.4, 911.2) requires anyone suing a public entity — the State of California, a city, a county, a school district, a transit authority, a public hospital — to first present a written administrative claim to that entity within six months of the date of injury. Until the entity acts on the claim (or 45 days pass without action, which constitutes a deemed rejection), you cannot file a lawsuit. After rejection, you typically have six months to sue under § 945.6.

The trap is that “six months” is months, not 180 days, and it is not the same as the two-year limitations period that an injured person might reasonably expect to apply. Cases involving the following defendants trigger the government-claim rule:

• A city or county vehicle — a city street-sweeper, a county-owned ambulance, an LAUSD school bus.
• A California Highway Patrol cruiser.
• A municipal bus (LA Metro, AC Transit, MUNI, SamTrans).
• A public hospital, including UC Health facilities and county hospitals.
• A dangerous condition of public property — a pothole, an unsignaled intersection, a missing guardrail (Government Code § 835).
• An on-duty city, county, or state employee acting within the scope of employment.

Late government claims can be presented within one year if the claimant applies under § 911.4 for permission to file a late claim, but the entity can deny that application, and courts are stingy with judicial relief under § 946.6. The practical rule: if a public entity is anywhere near the facts, treat the deadline as six months from the injury, present the claim, and figure out the longer-term litigation strategy afterward.

Medical malpractice runs on a separate clock

Code of Civil Procedure § 340.5 governs every claim against a “health care provider” for “professional negligence.” It is not § 335.1, and it is not two years. The rule is one year from when the plaintiff discovered (or, through reasonable diligence, should have discovered) the injury, capped by a three-year outer limit measured from the date of the underlying injury. Whichever expires first controls.

That means a misdiagnosis that produced no symptoms for two and a half years and was discovered in year three is barred by the three-year outer cap, even though the one-year discovery clock would otherwise still be running. Three statutory exceptions extend the outer cap: fraud, intentional concealment of the injury, and the presence of a foreign body with no therapeutic purpose. Minors under six get tolling until their eighth birthday; minors over six are tolled until 18.

Med-mal cases also require a § 364 notice of intent to sue — served at least 90 days before filing — which extends the limitations period by 90 days when served within the last 90 days of the limitations window. Failure to serve the § 364 notice is not itself fatal to the case (it’s a procedural violation, not jurisdictional), but it gives the defendant procedural leverage and forfeits any tolling benefit.

Delayed discovery: a rule that helps less often than people think

California recognizes a “delayed discovery rule” that postpones the running of the statute until the plaintiff knew or, through reasonable diligence, should have known of both the injury and the wrongful conduct that caused it. The leading case is Jolly v. Eli Lilly & Co., 44 Cal.3d 1103 (1988), which articulates the standard: the plaintiff has the burden to plead and prove the specific facts that explain why earlier discovery was not reasonably possible.

The doctrine helps in narrow circumstances:

• Latent toxic exposure — asbestos, environmental contamination, pharmaceutical injuries that surface years after exposure.
• Surgical foreign objects — sponges, instruments, or hardware that go undetected.
• Sexual abuse claims — California has separate statutes (CCP §§ 340.1, 340.16) with their own delayed-discovery frameworks.
• Fraud-concealed injuries — where the defendant actively hid information necessary for the plaintiff to connect cause and effect.

The doctrine usually does not help in:

• Car accidents where the injury was obvious at the scene, even if its full extent unfolded later. The clock starts at the accident, not the diagnosis.
• Slip and falls where the plaintiff knew they were hurt the day it happened.
• Cases where the plaintiff “didn’t realize how bad it was” — courts treat awareness of the injury, not appreciation of its severity, as the triggering event.

The defense bar has well-developed challenges to delayed-discovery pleading, and trial courts grant demurrers when the timeline pleaded does not plausibly explain why earlier diligence would not have surfaced the claim.

Tolling: situations that pause the clock

A handful of statutory tolling provisions stop the running of the limitations period:

Minors (CCP § 352(a)) — Tolling for the plaintiff’s minority. The clock starts on the 18th birthday for most claims. Medical malpractice modifies this for minors under six (see above).

Mental incapacity (CCP § 352(a)) — Tolling for plaintiffs who, at the time the cause of action accrued, lacked the legal capacity to make decisions. The disability must have existed at accrual, not arisen later.

Defendant absent from California (CCP § 351) — If the defendant is outside California for any period after the cause of action accrues, that time is excluded from the limitations calculation. This rule is rarely outcome-determinative in modern practice — most defendants can be served via long-arm jurisdiction whether they live in-state or not — but it can extend a window when a fleeing defendant is briefly outside the state’s reach.

Defendant in prison (CCP § 352.1) — A separate two-year tolling cap for plaintiffs incarcerated at the time of injury, with carve-outs and limits.

COVID-19 Emergency Rule 9 — The Judicial Council tolled all civil statutes of limitation from April 6, 2020 through October 1, 2020 (178 days) for claims with limitations periods over 180 days. That rule no longer adds time to new injuries, but it can still affect cases involving injuries accruing during that 2020 window.

Equitable estoppel — Not statutory tolling, but a doctrine that prevents a defendant from raising the statute as a defense when the defendant’s own conduct (affirmative misrepresentation, concealment, or a promise the plaintiff reasonably relied on) caused the late filing. The bar for estoppel is high and the plaintiff carries the burden.

Why “filing” matters more than people realize

The statute is stopped by filing the complaint with the court clerk. Many injured Californians assume their lawyer will “take care of it before the deadline” without realizing that filing — not investigating, not negotiating, not preparing the complaint — is the act that matters. A complaint dropped off at the clerk’s window on the deadline date stops the clock. A complaint mailed for filing and not yet received does not.

Practical implications:

• Last-minute filings carry real risk. Electronic filing systems crash, court holidays close clerks’ offices, weather closes courthouses. Files that lock in jurisdiction over a multi-million-dollar case must not depend on a single transmission.
• Service has a separate, longer window. Government Code § 583.210 gives 60 days post-filing for service, with extensions available. A timely-filed complaint that is then dismissed for delay-in-service can be refiled only if the limitations period has not yet expired.
• Dismissed complaints don’t reset the clock. A complaint filed timely, then dismissed for any reason other than on the merits, does not give the plaintiff a fresh two years to refile. There are narrow savings statutes (CCP § 583.310’s five-year rule for prosecution, for instance) but no general right to a do-over.

The deadline is not a guideline. It is the moment after which the case ceases to exist. The earlier the filing, the more room there is for everything else that has to happen to bring a personal injury case home: investigation, expert development, medical-record collection, mediation, and the long process of negotiating with insurance carriers who know that the closer the deadline gets, the more leverage they hold.