Workers' Comp in California: Who Needs It, What It Costs
Required from your very first employee — no exceptions.
California Labor Code section 3700 requires every employer with even one employee to carry workers' compensation insurance (or qualify for rare state-approved self-insurance). There is no small-business exemption, no part-time exemption, and no 'they're basically family' exemption. And the requirement is expanding: under current law, essentially all licensed contractors must carry workers' comp by January 1, 2028 — even with zero employees (several classifications, including roofing C-39, concrete C-8, HVAC C-20, asbestos C-22 and tree service D-49, are already there).
Here's how the system works and what it actually costs a Westside small business.
What workers' comp covers
Workers' comp is no-fault coverage for work-related injury and illness. It pays the employee's medical care, temporary and permanent disability benefits, job displacement vouchers, and death benefits — and in exchange, it is generally the employee's exclusive remedy: they don't sue you for the injury. That trade is the whole point. Going uninsured forfeits it, exposing you to direct lawsuits and state penalties at the same time.
What it costs
Premium = rate × each $100 of payroll, by job classification, adjusted by your claims history (experience modifier):
- Office/clerical: often under $1 per $100 of payroll — many Westside professional firms pay less than they expect
- Retail/restaurants: low-to-mid single digits
- Construction trades: mid-to-high single digits or more, by trade
Small California businesses commonly land around $60–$100/month for low-risk operations. Levers that lower it: accurate payroll classification (misclassified clerical staff rated as field labor is a classic overcharge), a written safety program, prompt claim reporting, and annual re-shopping — carrier appetite for classes shifts every year.
The penalties are not theoretical
Operating without coverage is a misdemeanor (up to a year in jail and $10,000+ fines). The state can issue an immediate stop order shutting the business, penalties can reach $100,000, and if an uninsured worker is injured you pay their claim out of pocket plus penalties. The DIR's employer FAQ spells it out.
Independent contractors: the trap
Calling someone a 1099 contractor doesn't make it so. California's ABC test presumes workers are employees unless all three prongs are met, and an 'independent contractor' who is really an employee is an uninsured employee — the worst possible audit outcome. If unlicensed workers help a licensed contractor, they're generally the contractor's employees by statute. When in doubt, cover them; the premium is cheaper than the penalty.
Do I need workers' comp for one part-time employee in California?
Yes. The requirement applies from the first employee, full- or part-time. Corporate officers and some owner-only businesses can be excluded, but the exclusion rules are specific — check before assuming.
How much is workers' comp for a small business in California?
Low-risk businesses commonly pay roughly $60–$100/month; rates run from under $1 to $10+ per $100 of payroll depending on classification and your claims history.
I'm a contractor with no employees. Am I exempt?
Maybe for now — but several CSLB classifications already require coverage regardless of employees, and California extends the requirement to all licensed contractors by January 1, 2028.
What happens if I'm caught without workers' comp?
A stop order closing your business immediately, fines that can reach six figures, misdemeanor charges, and personal liability for any injured worker's claim. It is dramatically cheaper to insure.
Can my landlord or a GC really demand a certificate of insurance?
Yes — requiring proof of workers' comp and liability coverage from vendors and subs is standard practice, and you'll need certificates to win the work.
Related pages
Worker's Compensation
Our workers' comp service for CA employers.
Learn more →Small Business Insurance in CA
GL, BOP, commercial auto — the full stack.
Learn more →Contractor License Bond Guide
The $25,000 CSLB bond, explained.
Learn more →This page is general information for California consumers, not legal, tax, or financial advice, and not an offer of coverage. Rates, rules, and carrier appetite change frequently — figures shown are typical ranges as of mid-2026 from public sources. Your own premium and eligibility depend on your specific situation. Confirm current requirements with the [California Department of Insurance](https://www.insurance.ca.gov/) or talk to a licensed agent. Express Financial & Insurance Services, Inc. is an independent brokerage in Santa Monica, CA — call 310-453-5736 for a no-obligation review.