Workers' Comp in California: What Every Employer Needs to Know

California requires workers' compensation insurance for every employer — no exceptions. Even if you have just one employee, even if that employee is part-time, you must carry coverage. This is stricter than most states, where thresholds of 3 to 5 employees are common.

Sole proprietors in certain industries (particularly construction) are also required to carry coverage. Corporate officers can exempt themselves in some cases, but the default is inclusion. The California Department of Industrial Relations enforces these requirements aggressively.

California ranks 4th most expensive among all 51 U.S. jurisdictions for workers' compensation, according to the Oregon DCBS 2024 Premium Rate Ranking Study. The state's index rate is $1.86 per $100 of payroll — 71% above the national median of $1.09.

For context, only Wyoming ($2.23), Montana ($1.87), and Alaska ($1.87) are more expensive. California's high rates reflect the state's generous benefit structure, high medical costs, and the volume of claims in industries like construction, agriculture, and hospitality.

Your actual premium depends on your industry classification code, payroll, and experience modification rate (EMR). A restaurant in Los Angeles will pay a very different rate than a software company in San Jose, even though both are in California.

Assembly Bill 5 (AB5), which took effect January 1, 2020, fundamentally changed how California classifies workers. Under the ABC test established by AB5, a worker is presumed to be an employee unless the hiring entity can prove all three conditions: (A) the worker is free from control and direction, (B) the work is outside the usual course of the hiring entity's business, and (C) the worker is customarily engaged in an independently established trade.

The insurance implications are significant. If workers you've been treating as independent contractors are reclassified as employees under AB5, you're retroactively responsible for their workers' compensation coverage. This can result in back premiums, penalties, and audit adjustments that catch employers off guard.

Industries most affected include construction, trucking, healthcare staffing, and professional services. If you use 1099 contractors in California, your workers' comp policy and classification should be reviewed annually to account for AB5 exposure.

Unlike monopolistic states (Ohio, North Dakota, Wyoming, Washington) where employers must buy from the state fund, California operates a competitive state fund called SCIF (State Compensation Insurance Fund). SCIF competes alongside private carriers like The Hartford, Employers, and AmTrust.

SCIF is often the insurer of last resort for businesses that can't find coverage in the private market — high-risk industries, new businesses without loss history, or companies with poor EMRs. But SCIF also writes competitive policies for standard risks. It's worth getting a quote from both SCIF and private carriers to compare.

As an agency, risk | x shops both SCIF and private carriers to find the best combination of price and coverage for California employers.

California treats failure to carry workers' compensation as a criminal offense. Under Labor Code Section 3700.5, operating without coverage is a misdemeanor punishable by up to one year in county jail and/or a fine of at least $10,000.

Beyond criminal penalties, the state can issue stop-work orders that shut down your business until coverage is obtained. Illegally uninsured employers also face penalties of up to $100,000 from the Uninsured Employers Benefits Trust Fund (UEBTF), which pays benefits to injured workers of uninsured employers and then seeks reimbursement from the employer.

The Division of Labor Standards Enforcement (DLSE) actively investigates complaints and conducts sweeps, particularly in construction and agriculture. The risk of getting caught is real, and the consequences are severe enough to threaten the survival of a small business.

Workers' comp isn't the only mandatory coverage in California. Commercial auto insurance is required for any business-owned vehicle, with minimum liability limits of 15/30/5 (bodily injury per person/per accident/property damage). However, most contracts and lenders require far higher limits.

California does not require general liability insurance by law, but it's effectively mandatory for any business that signs contracts, leases commercial space, or works with other businesses. Most landlords and general contractors require proof of GL coverage before you can operate.

Earthquake coverage is notably excluded from standard commercial property policies in California. If your business owns or leases property in a seismic zone (which is most of the state), you need a separate earthquake policy or endorsement. Many business owners don't discover this gap until after a loss.

Despite California's high baseline rates, there are legitimate strategies to reduce your premium. First, ensure your employees are correctly classified — misclassification is the most common source of overpayment. A clerical worker classified under a construction code will pay dramatically more than necessary.

Second, invest in a documented safety program. California's Division of Occupational Safety and Health (Cal/OSHA) provides resources, and many carriers offer premium credits for businesses with formal safety protocols, return-to-work programs, and regular training.

Third, manage your experience modification rate (EMR). Your EMR reflects your claims history relative to your industry. Every claim drives it up; a clean record drives it down. An EMR below 1.0 means you're paying less than the industry average. An EMR above 1.0 means you're paying more. Over three to five years, a strong safety record can reduce your premium by 20% or more.