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California Workers' Comp Filing Deadlines
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By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization · Cal Bar #285231
What deadlines control a California workers' comp case?
The key clocks cover injury notice, claim filing, insurer decision, treatment appeal, QME steps, reconsideration, and court review.
Workers' compensation deadlines are easy to miss because they start from different events. Some start when the injury happens. Some start when a form is served. Others start when a denial letter or judge decision arrives.
A missed date does not always end the case, but it can change the fight. Instead of proving the injury and benefits, the worker may first have to explain delay. That takes time and gives the insurer leverage.
This page is a practical clock list. It is not a substitute for advice about your exact service date or injury date. If a deadline is close, call Yazdchi Law at (661) 273-1780 before assuming the claim is safe or lost.
What are the main deadline triggers?
The trigger event matters. A work injury, completed DWC-1, UR denial, QME panel, or judge decision can each start a clock.
The first trigger is the injury itself. Labor Code 5400 covers notice to the employer. Labor Code 5405 covers the filing limit for many claims. For cumulative trauma, Labor Code 5412 can change the date because knowledge and disability both matter.
The next trigger is the completed DWC-1. That document starts the insurer's decision process under Labor Code 5402. If the insurer sits on the claim, the law may treat the claim as accepted after the decision period. That is why proof of delivery matters so much.
Later triggers are document-based. A utilization review denial can start the IMR clock under Labor Code 4610.5. A QME panel service date can start the strike period under Labor Code 4062.2. A judge's decision can start reconsideration time under Labor Code 5903.
| Step | Deadline | Law |
|---|---|---|
| Report injury to your employer | Within 30 days | Labor Code 5400 |
| File your workers' comp claim | Within 1 year | Labor Code 5405 |
| Insurer must accept or deny | Within 90 days | Labor Code 5402 |
| First disability check | Within 14 days | Labor Code 4650 |
| Appeal a denied treatment | Within 30 days | Labor Code 4610.5 |
Which deadline is most dangerous for new claims?
The earliest dangerous deadline is injury notice. A late report gives the insurer a simple defense before medical facts are developed.
Workers often lose time because they hope pain will fade. A shoulder strain becomes a tear. A back twinge becomes leg pain. A wrist ache becomes numbness. By the time the worker reports it, the employer may claim the injury happened somewhere else.
Written notice is the best protection. A short message to a supervisor can show that the employer knew. If the employer had actual knowledge, or if the delay caused no real prejudice, a late notice defense may fail. Still, fighting about notice is harder than reporting early.
The claim filing deadline is separate. Labor Code 5405 often becomes the bigger issue when a worker never files the DWC-1, waits after leaving the job, or learns later that a slow-developing condition was work-related. Cumulative trauma claims need special date analysis under Labor Code 5412.
What deadlines apply after treatment is denied?
A treatment denial can require a fast IMR request, so the worker should save the denial letter and act immediately.
Treatment disputes often arrive by mail or claims portal. The letter may say a request was denied, modified, or delayed after utilization review. That letter is not just an explanation. It can be the document that starts the next deadline.
Labor Code 4610.5 controls Independent Medical Review for many utilization review denials. The worker should not wait for the next doctor visit to ask what the letter means. Save the envelope, denial pages, fax cover sheet, and portal notice. The service date can matter.
| Step | What happens | Your deadline |
|---|---|---|
| Treatment request | Your doctor asks the insurer to approve care | None |
| Utilization Review | A reviewer approves, modifies, or denies it | Days |
| Denied | You request Independent Medical Review | 30 days to appeal |
| IMR decision | A neutral doctor decides on the records | Final and binding |
What deadlines apply after a judge rules?
After a judge decision, reconsideration time is short. The deadline usually runs from service, not from when you read it.
A Findings and Award or other final decision can start a fast appeal clock. The worker must read the proof of service, not just the first page of the decision. Mail and electronic service can produce different deadline calculations.
Reconsideration is technical. The petition must identify legal grounds, not just disappointment with the outcome. If reconsideration is denied, court review has another time limit. Because these steps are unforgiving, workers should seek help the day a judge decision arrives.
The safest system is simple: save every envelope, photograph every first page, write down the service date, and calendar a reminder before the deadline. Do not assume the adjuster, doctor, or employer is tracking it for you.
| Benefit | What it pays in 2026 |
|---|---|
| Temporary disability | Two-thirds of your wage, $264.61 to $1,764.11 per week, up to 104 weeks (Labor Code 4656) |
| Permanent disability | Two-thirds of your wage, $160 to $290 per week, set by your rating (Labor Code 4658) |
| Medical care | 100 percent of approved care, no copay (Labor Code 4600) |
| Medical mileage | 72.5 cents per mile to your appointments |
| Job retraining voucher | $6,000 if you cannot return to your old job (Labor Code 4658.7) |
| Death benefits | $250,000 to $320,000 to dependents, plus $10,000 burial (Labor Code 4702) |
Injured at work? Call (661) 273-1780
Tap to call →How can a worker avoid missing these dates?
Keep a deadline file with the injury date, report date, DWC-1 date, denial dates, service proofs, and hearing papers.
Yazdchi Law tracks deadline issues for workers tied to Van Nuys, Los Angeles, Long Beach, Pomona, San Bernardino, Riverside, and Oxnard WCAB districts. The firm reviews service dates, claim forms, medical letters, and hearing decisions before deciding the next step.
Eman Yazdchi is a Certified Specialist in workers' compensation law, certified by the California Board of Legal Specialization, State Bar of California. Call (661) 273-1780 if a denial, IMR form, QME panel, or judge decision just arrived. The sooner the date is checked, the more options usually remain.
Do not guess from the title of a document. Some letters look routine but start a deadline. Other letters sound threatening but do not require an immediate legal filing. The proof of service, mailing method, and type of decision all need to be read together.
Workers should also keep the whole envelope or electronic notice. A scan of only the first page may omit the service date. When the issue is close, that missing service proof can become the difference between a timely filing and an argument about whether the paper arrived too late.
If several clocks are running, the firm triages the deadline that can close first. Treatment appeals, judge decisions, and QME panel actions may require faster attention than general claim development. Sorting the dates in order keeps a worker from fixing one problem while another deadline expires.
A deadline review also checks whether the worker is dealing with a claim deadline, a benefit deadline, or an appeal deadline. Those categories require different responses. Calling every problem a filing deadline can lead to the wrong fix.
Even a short consult can confirm which paper starts the clock and which proof should be saved before the next filing is prepared.
Frequently Asked Questions
Does every California workers' comp deadline start on the injury date?
No. Some deadlines start on the injury date, but others start when a form, denial, QME panel, or judge decision is served. That is why the service proof and envelope matter. A worker should save each document exactly as received.
What if I reported the injury verbally but not in writing?
Verbal notice may still matter, especially if the employer had actual knowledge. The problem is proof. Write down who you told, when you told them, and what they said. Then give written notice as soon as possible and keep a copy.
When does the claim filing deadline run for cumulative trauma?
Cumulative trauma timing can depend on Labor Code 5412. The key is when the worker had disability and knew, or reasonably should have known, that work caused it. That date may be later than the first symptom date, so it needs careful review.
Can an insurer deny a claim after the decision period?
The insurer may try, but a late denial can face serious limits under Labor Code 5402. The facts matter, including when the DWC-1 was delivered and what the insurer could have discovered during the review period.
What is the safest way to track workers' comp deadlines?
Create one folder for the claim. Save the DWC-1, medical notes, denial letters, QME papers, hearing notices, decisions, envelopes, and emails. Put each service date on a calendar the same day the paper arrives.
Do weekends and holidays affect these deadlines?
They can affect how a due date is calculated, but do not rely on that without checking the rule. The safer approach is to act before the deadline week. Last-minute filings create avoidable risk if a portal, mail, or service issue occurs.
What if my employer caused me to miss a deadline?
Misleading conduct can support arguments against a deadline defense. Save texts, emails, witness names, and notes about what the employer said. A judge may consider whether the employer had knowledge or whether the worker had a good reason for delay.
When should I call about a deadline?
Call as soon as you know a date might matter. Waiting to see what happens can remove options. A short review can identify the trigger date, the type of deadline, and whether an emergency filing or response is needed.
Can I rely on the adjuster to remind me about deadlines?
No. The adjuster works for the insurance company and may not warn you before a deadline passes. Keep your own calendar, save each letter, and ask for legal review when a denial, QME panel, or judge decision arrives.
What if the deadline falls while I am waiting for medical records?
Do not wait on records if a filing deadline is near. A filing can often preserve rights while records are gathered later. Waiting for a perfect packet can be risky when the service date or injury date already started the clock.
Last reviewed by Eman Yazdchi, Esq., July 2026.
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