“Very thankful for everything they did for us. Always responsive, reassured us every step of the way and obtained a great result.”
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✦ Certified Specialist in Workers’ Compensation Law, certified by the State Bar of California, Board of Legal Specialization ✦
By Eman Yazdchi, Esq. · Certified Specialist in Workers' Compensation Law, State Bar of California Board of Legal Specialization · Cal Bar #285231
This rule gives the WCAB power to add a penalty when a carrier has no fair reason for delaying or refusing a benefit.
A late check can cause real harm. Rent is still due. Medical care may be waiting. California workers' comp has a penalty rule for delays that cross the line from mistake to unreasonable conduct.
The statute applies before or after an award. It can involve temporary disability, permanent disability, mileage, medical treatment, or another benefit owed in the claim. The key issue is whether the delay or refusal was unreasonable under the facts.
When payment of compensation has been unreasonably delayed or refused, either prior to or subsequent to the issuance of an award, the amount of the payment unreasonably delayed or refused shall be increased up to 25 percent or up to ten thousand dollars ($10,000), whichever is less.
The increase can be up to 25 percent of the delayed amount, but the added sum cannot exceed $10,000.
The penalty is measured against the payment that was delayed or refused. It is not measured against the whole case unless the whole case payment was the delayed item.
The judge has discretion. A short clerical delay may be treated differently from a repeated cutoff with no sound reason. Proof matters. Save notices, payment histories, bank records, emails, portal messages, and envelopes.
| Issue | Plain meaning |
|---|---|
| Penalty cap | Up to 25 percent of the delayed or refused payment, capped at $10,000. |
| Self-correction | If the employer discovers the problem first, it may pay 10 percent within 90 days with the delayed benefit. |
| Credit | A late-payment increase under Labor Code 4650(d) is credited against the same delayed benefit. |
| Time limit | A penalty action must be brought within two years from the date the payment was due. |
A carrier that finds its own mistake first may pay a smaller penalty within 90 days and avoid the larger fight.
If the employer or insurer discovers a possible violation before the worker claims a penalty, it can pay the delayed benefit plus a 10 percent self-imposed penalty. It must do this within 90 days of discovery. If done correctly, that payment replaces the larger penalty under this statute.
This is why timing matters. If a payment is missing, put the issue in writing. Ask for the benefit, the reason for delay, and the payment history.
The 4650 increase is tied to late TD or PD checks. The 5814 penalty needs an unreasonable delay or refusal.
Some temporary disability and permanent disability payments have automatic timing rules. A late payment under those rules may trigger a 10 percent increase. The larger penalty discussed here is different. It requires proof that the delay or refusal was unreasonable.
Both rules can touch the same late benefit. But the law gives credit for the 10 percent increase already paid on that same benefit. The payment ledger should be checked line by line.
A real dispute, a timely authorization, a settlement waiver, or a missed deadline can block or reduce a penalty request.
Not every late payment supports a penalty. The insurer may have a reasonable factual or legal dispute. Medical treatment has a special carveout too. If treatment was authorized on time, and the only fight is a provider billing dispute under the medical billing rules, the statute says no unreasonable delay in treatment is found.
Settlement papers can also wipe out old penalty issues. When the WCAB approves a compromise and release, findings and award, or stipulations, accrued penalty claims are treated as resolved unless they are expressly excluded. A similar issue can arise at trial if the penalty issue is not submitted or excluded.
Injured at work? Call (661) 273-1780
Tap to call →The review starts with the due date, the benefit type, the carrier's reason, and every payment or credit already made.
Yazdchi Law reviews penalty issues by building a simple timeline. What benefit was owed? When was it due? What did the carrier know? What reason was given? Was a 10 percent increase paid?
Eman Yazdchi is a Certified Specialist in Workers' Compensation Law, California Board of Legal Specialization, State Bar of California. The firm represents injured workers in California workers' comp cases involving unpaid benefits, late checks, medical treatment delays, and disputed awards. Call (661) 273-1780 for a case review.
This page is general information, not legal advice. A penalty request depends on the file, payment records, medical record, and WCAB documents.
Last reviewed by Eman Yazdchi, Esq., June 2026.
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