The single most important thing you can do after a work injury in California is to report it to your employer promptly and in writing. The clock starts the moment you're hurt — and missing the deadline is one of the most common reasons valid claims run into trouble.
The 30-day rule
Under California law, you generally must notify your employer of a work injury within 30 days. Reporting late doesn't always end your claim, but it can give the insurance company a reason to dispute it and can delay your benefits. The safest approach: report as soon as you reasonably can.
For injuries that develop over time — repetitive strain, hearing loss, or an illness caused by exposure on the job — the 30 days generally start when you knew (or should have known) the condition was work-related, often after a doctor connects the dots for you.
Who to tell, and how
- Tell a supervisor or manager — not just a coworker. Notice has to reach someone with authority.
- Put it in writing. A short email or text creates a dated record. Verbal-only reports are easy to dispute later.
- Keep a copy of whatever you send, and write down the date, time, and who you told.
Ask for the DWC-1 claim form
Once you report a work injury, your employer is required to give you a DWC-1 claim form within one working day. Filling out and returning that form is what officially opens your workers' compensation claim. If your employer doesn't offer it, you can request it directly — and you can download it from the California Division of Workers' Compensation. See our guide on filing your claim.
What to write down
Memories fade and details matter. As soon as you can, note:
- The date, time, and exact location of the injury
- What you were doing and how it happened
- Any equipment, substances, or conditions involved
- Names of anyone who saw it or who you told
- Every body part that hurts — even minor aches, which can become bigger problems
What if you're worried about reporting?
Many workers hesitate — they worry about losing their job, or about their immigration status. In California, most employees are covered by workers' compensation regardless of immigration status, and it is illegal for an employer to fire or punish you for filing a legitimate claim. If that happens, see our guide on employer retaliation.