Why Is My California Workers' Comp Premium Going Up in 2026, and How Do I Lower It?

Why is my workers' comp premium higher this year?

Two things are happening at once. The cost of workers compensation insurance, often shortened to workers comp, is set partly by a statewide advisory rate that insurers use as a starting point. For policies renewing or starting on or after September 1, 2025, California approved an increase of about 8.7 percent in that advisory pure premium rate, the first meaningful jump in close to a decade. The rating bureau has since recommended another increase of about 10.4 percent for policies on or after September 1, 2026. That second number is a recommendation the Insurance Commissioner still reviews, not a final bill, but it points in one direction.

The advisory rate is only a guide, and each carrier files its own rates, so two businesses in the same trade can still be quoted very differently. What the rising advisory number tells you is that the baseline cost of the same payroll and the same work is drifting up, driven by higher medical treatment costs, more litigation on claims, and the rising expense of adjusting and settling those claims.

There is also a separate line that catches owners off guard. California charges an annual assessment on workers comp policies to fund the system, and for 2026 that assessment runs around 5 percent of premium. It is not a carrier markup, it is a state charge, and it rides on top of whatever your policy costs. None of this means you are stuck with the number on your renewal, because a large part of the premium is still inside your control.

How is a workers' comp premium actually calculated?

The core formula is simpler than it looks. Your premium starts with your payroll, divided into one hundred dollar units, multiplied by a rate tied to a classification code that describes the kind of work your employees do. A roofer's code carries a much higher rate than an office clerk's, because the risk of injury is higher. Get the classification wrong and you can overpay for years, or underpay and face a correction at audit.

Most businesses have more than one class code. A restaurant may have a kitchen and serving code plus a clerical code. A nail or beauty salon, a construction crew, and a landlord with maintenance staff each map to their own codes. Splitting payroll correctly across those codes, where the carrier rules allow it, is one of the quiet ways a premium gets cleaned up.

Then the formula multiplies by your experience modification factor, the X-Mod, and adds the state assessment and any carrier specific fees. Because the X-Mod sits as a multiplier on the whole thing, it can swing your premium more than almost any other input, which is why it deserves its own look.

What is the X-Mod, and why does it matter so much?

The X-Mod, short for experience modification factor, compares your claims history to other businesses of similar size in your industry. A 1.00 is average. Below 1.00 is a credit that lowers your premium, and above 1.00 is a surcharge that raises it. A business sitting at 1.25 is paying twenty five percent more than an average peer for the same payroll and the same work.

Two details surprise owners. First, your 2026 X-Mod is built mostly from your claims in 2022, 2023, and 2024, so a rough year follows you for a while, and the clean year you may be having right now helps you later, not today. Second, the math weighs the number of claims more heavily than the size of any one claim. The first slice of each claim, around twenty thousand dollars for 2026, counts in full, so several small claims can hurt your X-Mod more than one large one.

That design is actually good news, because it means the lever you control is frequency. Fewer small, preventable claims, faster reporting, and getting injured workers back to suitable duty all push the X-Mod down over time. It is slow, but it compounds, and a lower X-Mod is the closest thing to a lasting discount in this line of coverage.

What can an Orange County small business do to lower it in 2026?

Start with an audit of your classification codes. Ask your broker to confirm every employee is in the right code and that payroll is split correctly where the rules allow. A single misclassified worker in a high-rate code can cost more than any other fix on this list, and it is the one most often wrong.

Report payroll accurately and keep clean records for the year-end premium audit. Workers comp is priced on estimated payroll and trued up at audit, so under-reporting leads to a surprise bill, and over-reporting means you financed the carrier all year. Overtime is often reported at straight-time wages for this purpose, and missing that can inflate the number. A few good records turn the audit into a quiet formality.

Build the basics that lower claim frequency. A written safety routine, simple injury reporting that happens the same day, and a return-to-work plan that offers light duty all help your X-Mod and your renewal. Then shop the policy. As an independent brokerage we can market the same payroll to several carriers, since appetite for restaurants, salons, and the trades varies a lot from one insurer to the next.

Get your workers' comp reviewed, in English or Vietnamese

A renewal increase is not always something you simply accept. A good share of a workers comp premium is the classification, the payroll split, and the X-Mod, and all three reward a careful review well before the renewal date.

As an independent brokerage in Fountain Valley, we work with several carriers, so we can read your current policy, check your class codes and X-Mod worksheet for errors, and compare quotes side by side on the things that move the number. We can walk you through all of it in plain language.

Send us your trade, your rough payroll, and your renewal date, in English or Vietnamese, and ask for a free quote and review. A short look now can tell you whether this year's increase is fixed or something you can trim before you sign.

Frequently asked questions

Why are California workers' comp rates going up in 2026?

The statewide advisory pure premium rate, which insurers use as a starting point, rose about 8.7 percent for policies on or after September 1, 2025, and the rating bureau has recommended a further increase near 10.4 percent for policies on or after September 1, 2026. Higher medical costs, more claim litigation, and a state assessment of roughly 5 percent of premium add to the trend. Your own classification and claims history still shape what you actually pay.

What is an X-Mod and how does it affect my premium?

The X-Mod, or experience modification factor, compares your claims history to similar businesses in your industry. A 1.00 is average, below 1.00 lowers your premium, and above 1.00 raises it. It works as a multiplier on the whole premium, so it can move your cost more than almost any other input. Your 2026 X-Mod is built mostly from your 2022 through 2024 claims, and the number of claims matters more than the size of any single one.

Can I lower my workers' comp premium without changing carriers?

Often yes. A large part of the premium comes from your classification codes, how payroll is split across them, and your X-Mod. Correcting a misclassified worker, reporting payroll accurately, lowering claim frequency, and running a return-to-work plan can all reduce the bill without switching carriers. Shopping the policy is a separate step that can help on top of that.

How is workers' comp premium calculated in California?

The base premium is your payroll divided into one hundred dollar units, multiplied by a rate tied to each classification code for the work your employees do. That result is multiplied by your X-Mod, then a state assessment of around 5 percent for 2026 and any carrier fees are added. Because the X-Mod is a multiplier, small errors in classification or claims history get magnified across the whole premium.

Do small restaurants and salons in Orange County need workers' comp?

In California, a business with even one employee is required to carry workers comp, and that includes most restaurants, nail and beauty salons, and construction crews in Orange County. The rules on owners and certain contractor license types are more detailed, so it is worth confirming your specific situation rather than guessing.

Can you review my workers' comp in Vietnamese?

Yes. We are a bilingual brokerage in Fountain Valley and can read your current policy, review your class codes and X-Mod worksheet for errors, and explain the limits and pricing in English or Vietnamese. Ask us for a free quote and review.