Coverage and classes

Who writes contractor workers' comp in California, and what that means when you're quoting against them

The carriers holding California contractor workers' comp, by policies on the public record, with what each one's book looks like and how producers position against them. Live counts from CSLB certificates.

3 min read · updated 2026-09-06

Because every insured contractor's carrier is on the licence record, the California contractor comp market can be counted rather than estimated. The carriers hub shows the live ranking; this guide explains what the ranking means for a producer with a competing market.

The shape of the market

State Compensation Insurance Fund holds roughly a quarter of all contractor policies on file, far more than any private carrier. It is the insurer of last resort, so every account that cannot get a private quote lands there, and it is also where a lot of clean accounts sit by default because nobody ever moved them. Its book skews to general building, roofing and framing, and to the smaller end of every trade.

Below the Fund, the contractor market is a crowd of specialty comp carriers each holding a few thousand policies: Pie, ICW, the AmTrust companies (Technology, Wesco, Security National), Employers (Employers Preferred, Employers Compensation, Employers Assurance), Omaha National, Everest, NorGUARD, Markel, Berkshire Hathaway's companies, and the national multi-line carriers writing comp alongside a package (Hartford, Travelers, Zurich, CNA's companies). Each has an appetite, and appetite is where a producer wins.

Reading a carrier's book

Each carrier page shows three things worth reading before quoting against it:

  • Trades. A carrier heavy in electrical and plumbing wants clean service contractors and will fight for them at renewal. A carrier heavy in roofing is taking the hard classes and will not be undercut on price by a market that does not write roofing.
  • Renewal calendar. Books are lumpy. A carrier whose contractor policies cluster in January and July was writing a lot of new business in those months two years ago; those accounts are now on their second renewal and are the most likely to shop.
  • Counties. Books are regional because agencies are regional. A carrier with a heavy Riverside book has a strong appointed agency in Riverside; competing there is competing with that agency.

Positioning against the Fund

State Fund accounts move when a private market opens for the class. The pitch is not "cheaper"; it is "you qualify now": a clean loss record, a bond with no suspensions, five years licensed, and payroll above the minimum a specialty carrier wants. Check the record first. A contractor with a comp suspension in the last three years is not moving off the Fund, and the email saying so wastes the fact.

Positioning against the specialty carriers

Specialty comp carriers compete on service and on class-code accuracy more than on rate. The two openings are audit pain (a bad class assignment that produced a surprise audit bill) and growth (a policy written for a smaller company). Both show up in the public record as signals: permit surges, fleet growth, a second licence class added.

The classes that decide it

Roofing, framing and demolition are hard to place and go to the Fund or a handful of specialists. Electrical, plumbing, HVAC and landscaping are contested by everyone and are where most producer outbound concentrates. The class pages list the carriers writing each one, statewide, by policies on file.

Where the numbers come from

Every count here is the CSLB workers' comp certificate on the licence record, aggregated weekly. It is policies, not premium, so a carrier with many small accounts ranks above a carrier with fewer large ones. Premium is not public in California, for any carrier, and any vendor showing it is estimating.

Put this to work in your territory.
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