Who Needs Workers' Comp in California?
California has some of the strictest workers' compensation requirements in the country. Under California Labor Code Section 3700, every employer — regardless of size, industry, or whether employees are full-time, part-time, or seasonal — must carry workers' compensation insurance. This includes sole proprietors who hire even one employee.
The penalties for non-compliance are severe. Operating without coverage is a criminal misdemeanor punishable by a fine of up to $10,000, imprisonment in county jail for up to one year, or both. The state can also issue stop-work orders and assess penalties of up to $100,000 against uninsured employers.
How California Workers' Comp Rates Are Calculated
California workers' comp premiums are based on four main factors: your industry classification code (assigned by the WCIRB), your total payroll, your claims history, and your experience modification rate (EMR or X-Mod). The WCIRB sets advisory pure premium rates, but individual carriers can deviate from these rates — which is why shopping multiple carriers can save you significantly.
Classification codes group businesses by the type of work their employees perform. A clerical office (class code 8810) carries much lower risk than a roofing contractor (5551), which is reflected in the rate per $100 of payroll. California uses WCIRB class codes rather than the NCCI codes used in most other states, though many codes overlap.
California WCIRB Class Code Changes (2024)
Effective September 1, 2024, the WCIRB introduced significant changes to food service industry classifications. The previous catch-all code 9079(1) "Restaurants or Taverns — All Employees" was eliminated and replaced with six new specific classifications:
These new codes allow for more precise risk analysis by food service segment. While initial rates remain similar, they may diverge as claims data develops for each category.
Common California Class Codes & Rates
| Code | Description | Risk Level |
|---|---|---|
| 8810 | Clerical Office Employees | Low |
| 8742 | Outside Salespersons | Low |
| 9080 | Restaurants — Full Service | Medium |
| 5183 | Plumbing NOC | Medium |
| 5190 | Electrical Wiring — Within Buildings | Medium |
| 5403 | Carpentry NOC | Medium-High |
| 5551 | Roofing — All Kinds | High |
How to Reduce Your California Workers' Comp Costs
The most effective way to lower your premium is to reduce your experience modification rate through a strong safety program and effective claims management. An EMR below 1.0 means you're performing better than average for your industry, which directly reduces your premium. Other strategies include ensuring employees are classified under the correct class codes, implementing a formal return-to-work program, and comparing quotes from multiple carriers — rates can vary significantly for the same coverage.
California State Fund vs. Private Carriers
California's State Compensation Insurance Fund (State Fund) serves as both a competitive carrier and the insurer of last resort. If your business has been declined by private carriers — due to a high EMR, difficult class code, or claims history — State Fund is required to offer coverage. However, private carriers often provide more competitive rates for businesses with good loss histories and can offer more flexible payment options.