What Is California Labor Code §5407: Serious and Willful Deadline?

The period within which may be commenced proceedings for the collection of compensation on the ground of serious and willful misconduct of the employer, under provisions of Section 4553, is as follows: Twelve months from the date of injury. This period shall not be extended by payment of compensation, agreement therefor, or the filing of application for compensation benefits under other provisions of this division.

What does Labor Code 5407 do?

It sets a twelve month limit for a Labor Code 4553 penalty claim, and nothing about your regular case pauses that limit.

Two different clocks run in a case like this. Your regular comp claim follows the one year limit in Labor Code 5405. A penalty claim for serious and willful misconduct follows a different limit instead. That limit sits in Labor Code 4553, and here in Labor Code 5407: twelve months. The twelve months start at your date of injury. They do not start when you learn about a safety problem. They do not start when the insurer rules on your regular claim. They do not start at settlement.

The twelve months apply whenever a worker wants the Labor Code 4553 penalty. That penalty can reach an employer, a partner, a corporate officer, or a managing or general superintendent. It does not touch your separate right to file the underlying claim itself. Labor Code 5405 covers that right on its own terms.

How does the twelve month limit work in practice?

It starts at your date of injury and runs on its own, no matter what happens in your regular case.

A single accident usually has one clear date. That is the day it happened. A cumulative injury works differently. Labor Code 5412 sets the start date for those cases. The clock begins when you first lost some ability to work from the condition. It also needs proof that you knew, or should have known, that the job caused it. Once that date is fixed, the twelve months begin. Nothing about your ordinary benefits changes that count.

This creates a real trap. You might still have time for medical care and disability pay. At the same time, the window for a penalty claim could be closing. The two laws measure time in different ways.

What will not buy you more time?

Benefits, an agreement, or your regular paperwork will not add a single day.

Three things do not stop this clock. The first is a benefit payment. The second is an agreement about benefits. The third is filing an application under any other comp provision. A worker who keeps getting disability checks gains nothing from that fact alone. Neither does a worker who signs a settlement on the regular claim. The twelve months move forward regardless.

Does anything pause the twelve months?

One statute pauses it, for a minor or an incompetent worker. Otherwise, the law lists no late discovery exception.

Labor Code 5410 lets a worker reopen a settled case. That right runs five years from the injury, for new and further disability. Its own text says it does not extend the limit in Labor Code 5407. Reopening the regular case will not revive a missed penalty window. The two rights stay apart.

Labor Code 5408 is the real exception here. It pauses every time limit in this part of the law. A worker under eighteen gets that pause. So does a worker who is legally incompetent. The pause lasts until a guardian, conservator, or trustee steps in for them. Outside that one situation, the statute names no late discovery rule. Early action matters for this reason.

How does this limit connect to the Labor Code 4553 penalty?

One section sets the limit. The other section creates the fifty percent increase that limit protects.

Labor Code 4553 lets an injured worker recover a fifty percent increase on compensation. Serious and willful misconduct has to cause the injury first. The rule can reach the employer, a partner, a corporate officer, or a managing or general superintendent. By law an employer cannot insure against this increase, so the employer pays it directly, not the insurance carrier (Insurance Code section 11661). Labor Code 5407 sets the outer limit for bringing that claim. The limit stands apart from the one year rule in Labor Code 5405 for ordinary medical care and disability pay.

What should you save or ask about early?

Save proof fast, and raise the question before your regular case ends.

Proof of a safety problem can vanish quickly. Equipment gets fixed or swapped out. Warning signs come down. Coworkers who saw the danger change jobs. The twelve month clock keeps running through all of this. Waiting until your case is near settlement is risky. The window may have already closed by then. Save written complaints, safety citations, and incident reports right away. Save photos and the names of any coworkers who saw the hazard too. Ask a workers' compensation attorney about this kind of claim as soon as you suspect the employer knew about a danger and did nothing.

If you believe an employer's conduct meets the serious and willful standard and caused your injury, check this deadline first. It runs apart from your regular claim. The firm reviews each matter individually, including whether the facts and the timing support a claim like this. Call (661) 273-1780 or use the contact form to discuss your situation. For how a California workers' comp claim moves from report to resolution, see how a California workers' comp claim works, and for a real example, see this case study on a serious and willful penalty.