What is the one-year deadline everyone talks about?
California Labor Code Section 5405 generally gives injured workers one year from the date of injury to file a workers' compensation claim with the Workers' Compensation Appeals Board (WCAB). This is often called the statute of limitations. Many workers hear "one year" and assume that once that year passes, they've lost every right to benefits. That belief stops a lot of people from ever asking a lawyer to look at their situation.
But the one-year clock doesn't always start on the date most people assume. It can start later, it can pause, and in some situations it can even restart. The date of injury for a sudden accident — a fall, a machine injury, a car crash on the job — is usually clear. For other injuries, especially ones that build up over time or that you didn't connect to work right away, the starting point is much less obvious, and that's where real exceptions come in.
What is the discovery rule and how does it help?
The discovery rule says the one-year clock doesn't start on the day you got hurt — it starts on the day you knew, or reasonably should have known, that your injury was caused by work and was disabling. This matters for conditions like hearing loss, respiratory illness, hernias, or injuries that seemed minor at first but got worse later.
Example: if you hurt your back on the job three years ago but a doctor only diagnosed a disc injury and connected it to that incident last month, your filing clock may have only started running last month — not three years ago. The law doesn't expect workers to file claims for injuries they didn't understand were work-related. If you can show you only recently learned the connection between your job and your condition, the discovery rule may keep your claim alive well past a literal one-year mark from the original incident.
What about repetitive strain and cumulative trauma injuries?
Cumulative trauma (CT) claims cover injuries caused by repeated work activities over time — think carpal tunnel from typing, back and joint damage from years of lifting, or hearing loss from years of noise exposure. Because there's no single accident date, California law uses a special rule: the date of injury for CT claims is the date you knew or should have known that your condition was work-related and disabling, often tied to when you first missed work or saw a doctor because of it (Labor Code 5412).
This means workers who assumed years of wear-and-tear injuries were "too old" to claim may still be within the filing window, because the clock is measured from awareness, not from your first day on the job or your first ache. CT claims are common in warehouse, construction, nursing, and factory jobs. If your pain built up slowly and you're not sure when it became "official," that uncertainty is exactly why a professional review of your dates matters before assuming you're out of time.
Can the deadline be paused or "tolled"?
Yes. Several situations can toll — legally pause — the one-year filing clock. If your employer failed to post required workers' comp notices, never gave you a DWC-1 claim form after you reported an injury, or misled you about your rights, courts have found those failures can delay when the deadline actually starts running. Similarly, if you already filed a claim and your employer or insurer paid you medical treatment or disability benefits without you formally filing, that payment history can sometimes extend your rights under Labor Code 5410 and related provisions.
Minors, certain workers with limited capacity, and cases involving employer fraud or concealment can also involve different timing rules. These exceptions are technical and fact-specific — small details about what your employer said, what paperwork exists, and what benefits were paid can change the outcome entirely. This is not something to self-diagnose from a general article; it requires someone to actually look at your paperwork and timeline.
When should you talk to a workers' comp lawyer?
Talk to a lawyer as soon as you start wondering whether "too much time" has passed — before you assume the answer is no. Deadline questions are some of the easiest cases to lose by giving up too early and some of the hardest to fix once a claim is formally denied as untimely. A lawyer can pull your medical records, employment dates, and any prior paperwork to pinpoint your legal date of injury and check it against the discovery rule, cumulative trauma rules, and tolling exceptions.
Even if the news isn't good, you'll know for certain instead of guessing. And in many cases, workers are surprised to learn their window is still open because they misunderstood when the clock actually started. Don't let an assumption cost you benefits you're still entitled to.
Don't assume — get your dates checked for free
If you've been telling yourself it's too late to file, let someone check the actual dates first. A free, no-obligation case evaluation from Yazdchi Law, P.C. can review your injury date, symptoms, paperwork, and employer conduct to see whether an exception applies to your situation. Serving workers in Los Angeles, Kern, Ventura, San Bernardino, Riverside, and Orange counties. Get your free case evaluation before you give up on your claim.
*This article is general information about California workers' compensation, not legal advice about your situation. Every case is different.*
Yazdchi Law, P.C. — Eman Yazdchi, responsible attorney. Office: Palmdale, California. Attorney advertising.