Third-Party Claims

Workers' compensation pays for medical treatment, wage replacement, and permanent disability. It does not pay for pain and suffering, emotional distress, loss of consortium, or punitive damages — and it replaces only two-thirds of your wages, up to a cap.

A third-party claim can reach all of it.

If someone other than your employer contributed to your injury, you may have two cases running at once: the workers' compensation claim, and a civil lawsuit. The largest recoveries in this practice come from exactly that combination.

The exclusive remedy, and its limits

Labor Code §§ 3600 through 3602 embody the bargain at the heart of the system: you do not have to prove your employer did anything wrong, and in exchange you generally cannot sue your employer.

But "your employer" is a narrow category. Everyone else on that job site, that road, or that piece of equipment is fair game.

Construction sites are the classic case. Multiple employers, multiple trades, one worker hurt. The comp claim runs against the direct employer; the civil claim runs against everyone else whose negligence contributed.

The narrow ways you can sue your own employer

Four statutory exceptions, and they are genuinely narrow. Anyone promising you a lawsuit against your employer should be able to point at one of these.

Willful physical assault by the employer (§ 3602(b)(1)). A physical assault, willful, by the employer personally or someone whose acts are the employer's. Harassment and negligent supervision do not qualify.

Fraudulent concealment (§ 3602(b)(2)). Where the employer knew of your injury, concealed it from you, and the injury was aggravated as a result. Recovery is limited to the damages from the aggravation. This is the toxic exposure and occupational disease provision — the employer sitting on medical monitoring results.

A defective product the employer manufactured (§ 3602(b)(3)). The product must make a full round trip: manufactured by the employer, sold or transferred to an independent third party, then provided back to you for use by a third person. A product used in-house never leaves the exclusive remedy.

The power press exception (§ 4558). Where the employer knowingly removed or failed to install a point-of-operation guard on a power press, specifically authorized in advance, under conditions known to create a probability of serious injury or death.

Two elements defeat most § 4558 cases, and both are about evidence: "specifically authorized" means an affirmative instruction issued before the injury — a supervisor who saw the guard was off and said nothing has not authorized anything. And the statute requires proof that the manufacturer specified the guard and conveyed that requirement to the employer.

If a machine injured you, preserve the machine, the manual, and the purchase file immediately. Those documents win or lose § 4558 cases, and they are exactly what gets thrown away.

(You will still find pages describing a "dual capacity" exception. The Legislature abolished it in 1982. What survives is the narrow codified product exception above. Content describing dual capacity as a live route is forty years out of date.)

And the exception nobody lists: the uninsured employer

If your employer failed to carry workers' compensation insurance, you can sue them in civil court as if the workers' compensation system did not exist (LC § 3706).

And the deck is stacked in your favor. Under LC § 3708, the injury is presumed to have resulted from the employer's negligence, the burden is on the employer to rebut it, and the employer cannot argue contributory negligence, assumption of risk, or the negligence of a fellow worker.

You also have a simultaneous claim through the Uninsured Employers Benefits Trust Fund, and a judgment can reach parent companies and substantial shareholders.

For a Southern California practice this matters more than all the exotic exceptions combined. If you were told your employer had no insurance, that is not the end of your case. It may be the beginning of a much better one.

The employer's lien — and why it is smaller than it looks

If you recover in the civil case, your employer or its carrier has a lien for what it paid in workers' compensation benefits. That is real, and it surprises people.

But it comes out in a specific order, and the employer pays its share of the cost of the recovery.

Under LC § 3856 the distribution is: first, reasonable litigation expenses and a reasonable attorney's fee, fixed by the court; second, the employer's lien; third, the balance to you.

Under Quinn v. State of California (1975) 15 Cal.3d 162, the employer "must bear his fair share of the cost of the recovery." A carrier asserting a $200,000 lien against a $600,000 recovery does not collect $200,000 — it collects its share net of a proportionate contribution to the fees and costs your attorney incurred generating the recovery.

And the employer's own negligence reduces it further. Where the employer's concurrent negligence contributed to the injury, the lien is reduced accordingly. On a construction site where the direct employer's own safety failures contributed, that reduction can be substantial.

The credit is the bigger number

The lien recovers what has already been paid. The credit under §§ 3858 and 3861 extinguishes what would otherwise be paid in the future — future medical, future permanent disability, future temporary disability.

On a case with an open future medical award, the credit can be worth several times the lien. This is why the two cases have to be handled with each other in view, and why settling one without analyzing the other is how value disappears.

A major change for police and firefighters

SB 487 (Chapter 763, Statutes of 2025), effective January 1, 2026, substantially rewrote employer subrogation in cases involving peace officers and firefighters employed by a city, county, city and county, or fire protection district.

Where the worker's total damages exceed the net recovery and the available liability insurance is insufficient to compensate both:

• The employer is entitled to no more than one-third of the third-party defendant's applicable liability policy limits;
• The employer has no right to assert any credit or offset against future workers' compensation benefits — expressly including temporary disability, permanent disability, medical treatment, and vocational rehabilitation;
• The employer's written consent to settlement is no longer required;
• The Appeals Board lacks authority to allow a credit.

In plain terms: in an underinsured case, an injured officer or firefighter now keeps far more of the civil recovery, and keeps their future comp benefits on top of it. Where coverage is ample, the traditional framework still applies.

If you are a peace officer or firefighter with a third-party claim, this changed less than eight months ago and a great deal of published guidance has not caught up.

What the civil case reaches that comp does not

That last row is the trade. Workers' compensation pays without fault. A civil case requires proving someone was negligent — but the damages are of a completely different order.

Deadlines — and they are not the same

The government claim deadline is the one that destroys cases. If a city, county, transit agency, school district, or the state contributed to your injury — a road defect, a public vehicle, a public property condition — you generally have six months to file an administrative claim before you can sue at all. That runs while your comp case is just getting started, and it does not wait for anyone.

If any public entity is anywhere near your injury, that clock needs to be identified in the first week.

Frequently asked questions