Workers comp cost in California comes down to three things: how much payroll you run, the type of work your employees do, and your claims history. California does not set one fixed rate that every insurer must charge. An independent bureau publishes advisory benchmark rates, and each insurer then files its own rates on top of them, so shopping matters. As of mid-2026, those advisory benchmark rates have been rising, so it is a good time to compare carriers.
Who this is for: California employers who have to carry workers comp and want to understand what sets the price and how to keep it down.
The short version
- Premium is roughly your payroll, divided into 100-dollar units, times a rate for each type of work.
- The category your work falls into for pricing, often called the class code, moves the price the most.
- A score built from your past claims, the experience modification rate, raises or lowers your price.
- California insurers set their own rates, so two carriers can quote the same business very differently.
- As of mid-2026, the advisory benchmark rates behind many quotes have been increasing, the first rise since 2015.
What drives your price
| Factor | What it means | Effect on cost |
|---|---|---|
| Payroll | Your total wages, counted in 100-dollar units | More payroll, more premium |
| Type of work (class code) | A category for the risk of your work | Roofing costs far more than clerical |
| Claims history (experience modifier) | A score from your past claims | A good record lowers it, a bad one raises it |
| Carrier | Each insurer files its own rates | Shopping can change the price meaningfully |
How California sets rates
California is not a state that publishes one mandatory rate, and it does not use the national rating bureau that many states rely on. Instead, an independent state bureau, the Workers' Compensation Insurance Rating Bureau of California, files advisory benchmark numbers called pure premium rates, which the Insurance Commissioner reviews. Each insurer then sets and files its own rates, competing openly, which is why quotes vary between carriers. As of mid-2026, the approved advisory rates rose about 8.7 percent effective September 1, 2025, the first increase since 2015, and the bureau has filed for roughly another 10.4 percent effective September 1, 2026, which regulators were still reviewing. Those benchmark rates are advisory only; the price you pay is the insurer's own filed rate.
How to keep the cost down
The two levers you control most are your classification and your claims. Making sure each employee is placed in the correct type-of-work category matters, because a wrong category can overcharge you for years. Keeping claims down improves the score built from your history, which directly lowers your rate. Reporting your payroll accurately at audit avoids surprise bills. And because California insurers price differently and the benchmark has been rising, comparing carriers at renewal is one of the simplest ways to make sure you are not overpaying.
An Inland Empire trucking example
Illustrative, not a quote. A trucking company near Riverside with a dozen drivers gets a renewal that looks high. When we review it, part of the payroll for office staff was rated at the higher driving category by mistake, inflating the premium. We correct the classification, confirm the company's claims score is applied correctly, and shop the account against several carriers. The corrected classes and a fresh set of quotes bring the price down without cutting any coverage, even with the benchmark rates rising.
Real questions California owners ask
How is workers comp priced in California?
It is based on your payroll counted in 100-dollar units, a rate for your type of work, and a score from your claims history. Each California insurer files its own rates, so prices vary between carriers.
Why is my price so different from the shop next door?
Usually your type of work and who you buy from. The category your business falls into for pricing, often called the class code, captures how risky the work is and moves the price the most, so a roofer pays far more than an office next door. On top of that, each California insurer files its own rates, so even similar businesses get different quotes.
If I have a claim, does my price go up next year?
It can. A score built from your past claims, called the experience modification rate, raises or lowers your price. A clean history pulls it below average and lowers your cost, while claims push it up and raise your price the following year.
Are California workers comp rates going up or down?
As of mid-2026, they are rising. The advisory benchmark rates rose about 8.7 percent effective September 2025, the first increase since 2015, and the bureau has filed for roughly another 10.4 percent for September 2026.
Does California set one rate all insurers must charge?
No. An independent state bureau files advisory benchmark rates, but each insurer sets and files its own rates on top of them. That is why two carriers can quote the same business quite differently.
How can I lower my workers comp cost?
Make sure employees are in the correct type-of-work category, keep claims down to improve your score, report payroll accurately at audit, and compare carriers at renewal since California insurers price differently.
Why did my premium change at audit?
California comp premium is based on actual payroll, so if your wages were higher than estimated, the audit trues up the premium. Correct classifications and accurate payroll estimates reduce audit surprises.
Why California owners choose Morrow
- We shop the right market for you. In California you buy workers' comp on the open market from any licensed private carrier, with the State Compensation Insurance Fund competing alongside them and standing as the insurer of last resort, so we can shop your rate freely and still have a guaranteed fallback for hard-to-place accounts.
- We catch pricing mistakes. Your price depends heavily on the category your work falls into for pricing (the class code). Put people in the wrong category and you overpay for years. We review your payroll and classifications before you buy.
- Proof of coverage, fast. Need a certificate (proof of coverage) for a general contractor or a landlord before Monday? We turn those around the same business day for most carriers.
- We help lower the score that drives your price. Insurers give you a score based on your past claims that raises or lowers your cost (the experience modification rate). We review it each year, flag errors, and connect you with return-to-work and safety resources that bring it down.
- Real people when a claim happens. When someone gets hurt, we stay involved through the life of the claim, not just at renewal.
Related California guides
Every California business is set up a little differently. These companion guides answer the same question for other situations, plus the national explainers behind the terms used here.
- Business insurance in California (start here)
- Workers comp: the owner's overview
- I own an LLC: do I need workers comp?
- I'm a sole proprietor: do I need workers comp?
- I own a corporation (C-corp or S-corp): do I need it?
- We're a partnership: do we need workers comp?
- We're a nonprofit: do we need workers comp?
- My workers are 1099: do I still need it?
- Only part-time or seasonal staff: do I need it?
- I only employ family: do I need workers comp?
- Remote or out-of-state staff: do I need coverage?
- What happens if I don't carry workers comp?
- How do I get workers comp (even if turned down)?
- What insurance do I need for a contractor license?
- Workers compensation insurance, explained
- What workers comp costs (national guide)
- Glossary: workers comp class code
- What is an experience mod, and how do I lower it?
- California trucking workers comp
This guide is general information, not legal advice. California rules and penalty amounts can change, so verify current requirements with California Division of Workers' Compensation (DWC), a division of the Department of Industrial Relations (DIR) or a licensed advisor before you rely on them. Last updated: July 2026.