In this guide9 sections
Labor Code §3600 is the basic test for whether an injury is covered by California workers’ comp. Your employer is liable for benefits, without regard to anyone’s negligence, when you’re an employee, you were doing something connected to your job when you were hurt, and the injury was caused by your employment, unless one of the statute’s specific exclusions applies, such as intoxication or being the initial aggressor in a fight. When insurers deny claims, they often point to §3600, so knowing exactly what it says helps you respond.
Key takeaways
- Workers’ comp is no-fault: §3600 makes the employer liable “without regard to negligence” when the listed conditions are met.
- The core test is that the injury arose out of and occurred in the course of employment (often called AOE/COE).
- The statute excludes injuries caused by intoxication, intentional self-infliction, being the initial physical aggressor, a felony conviction and voluntary off-duty recreational activities, among others.
- The employer has the burden of proving defenses like intoxication, willful misconduct and independent contractor status (§5705).
- Claims filed after a termination or layoff notice are limited, but several exceptions apply (§3600(a)(10)).
What Labor Code §3600 requires
Section 3600(a) says liability exists “without regard to negligence” when all of these conditions concur:
- Coverage. You and your employer are both subject to the workers’ comp law at the time of injury.
- Course of employment. You were performing service “growing out of and incidental to” your employment and acting within the course of your employment.
- Causation. The injury was “proximately caused by the employment, either with or without negligence.”
The remaining conditions are exclusions. Benefits aren’t owed if the injury was:
- caused by your intoxication by alcohol or unlawful use of a controlled substance (§3600(a)(4));
- intentionally self-inflicted, or a death you willfully caused (§3600(a)(5), (6));
- from an altercation in which you were the initial physical aggressor (§3600(a)(7));
- caused by your commission of a felony or specified crime for which you were convicted (§3600(a)(8));
- from voluntary participation in an off-duty recreational, social or athletic activity that isn’t part of your work duties. This exclusion doesn’t apply if the activity was a reasonable expectancy of, or expressly or impliedly required by, your job (§3600(a)(9)).
Section 3600(c) adds a protection for workers attacked by a third party because of the attacker’s beliefs about the worker’s perceived race, religion, national origin, sex, gender identity, sexual orientation or other listed characteristics. The attack can’t be treated as “personal” just because of those beliefs. See workplace assaults and violence.
Arising out of and in the course of employment
Most §3600 disputes come down to AOE/COE. “Course of employment” looks at time, place and activity: were you working, or doing something reasonably connected to work, when you were hurt? “Arising out of” looks at cause: did the job contribute to the injury? Our guide to AOE/COE in California workers’ comp covers this in more depth.
A common example is the commute. Under the “going and coming” rule, injuries during an ordinary commute generally aren’t covered, but the Workers’ Compensation Appeals Board recognizes exceptions such as a special mission or errand for the employer, a special risk tied to the job, and situations where you’re required to bring your own vehicle for work. Driving as part of your job raises different questions; see car accident while driving for work.
Cumulative injuries count too. Under §3208.1, repetitive physical or mental trauma over time is an injury, so it can meet §3600 even without a single accident.
Claims filed after a termination or layoff
Under §3600(a)(10), if you file a claim after receiving notice of termination or layoff for an injury that happened before the notice, you must prove by a preponderance of the evidence one of these:
- the employer had notice of the injury before the termination or layoff notice;
- medical records from before the notice contain evidence of the injury;
- the date of injury falls after the notice but before the termination or layoff took effect; or
- for a cumulative injury or occupational disease, the date of injury under §5412 is after the notice.
Psychiatric injuries have their own post-termination rules under §3208.3(e). For more, see can I file workers’ comp after being fired or quitting?
Common insurer arguments and how workers respond
| Insurer argument | How workers often respond |
|---|---|
| “You were at fault.” | Workers’ comp is no-fault; your carelessness generally doesn’t defeat a claim. |
| “You were intoxicated.” | The employer must prove intoxication caused the injury (§5705(b)), not just that you had been drinking. |
| “You’re an independent contractor.” | The employer must prove it (§5705(a)), and anyone performing services for another is presumed to be an employee (§3357). |
| “You didn’t report it within 30 days.” | Late notice is not a bar unless the employer was actually misled or prejudiced (§5403), and the employer’s knowledge from any source counts (§5402(a)). |
A hypothetical example
Denise, a retail stocker, slips on a wet floor in the back room while carrying boxes. She’d skipped her safety shoes that day. The insurer suggests she was careless.
Under §3600, Denise’s carelessness doesn’t matter. She was doing her job, on the employer’s premises, and the fall was caused by her work conditions. None of the exclusions apply. Her claim meets the §3600 test, and she should report it and file a DWC-1 claim form right away.
Steps to take
- Report the injury to your employer in writing as soon as possible. Labor Code §5400 calls for notice within 30 days, even though late notice isn’t automatically fatal.
- File a DWC-1 claim form and keep a copy.
- Write down how, where and when it happened, what you were doing for work at the time, and who saw it.
- Get medical care and tell the doctor how the injury happened at work.
- If the claim is denied, ask for the reason in writing and get advice. The DWC’s Information and Assistance Unit is free.
Frequently asked questions
Am I covered if the accident was my fault?
Generally yes. Section 3600 imposes liability “without regard to negligence,” so your own carelessness usually doesn’t bar benefits. Intoxication, intentional self-injury and the other listed exclusions are different.
Am I covered at a company softball game or holiday party?
It depends. Voluntary off-duty recreational or social activities are excluded, but not if attendance was expressly or impliedly required or a reasonable expectancy of the job.
Is my commute covered?
An ordinary commute usually isn’t, under the going and coming rule. Exceptions can apply, for example if you were running an errand for your employer or were required to use your own vehicle for work.
Was I covered if I was hurt in a fight at work?
Often yes. Section 3600(a)(7) excludes the injury only if you were the initial physical aggressor in the altercation.
Can I still claim if I was laid off?
Possibly. You’ll need to show one of the §3600(a)(10) exceptions, such as medical records or notice to the employer from before the layoff notice.
Talk to a California workers’ comp lawyer
Employees First Labor Law represents workers exclusively in workers’ comp and employment cases. We offer free virtual consultations to review how your injury happened and whether the insurer’s denial holds up. Contact us online or call (310) 853-3461.
This article is general information about California law as of 2026, not legal advice for your situation. Reading it does not create an attorney-client relationship.
