California Contractor Insurance
Asena Capital Insurance Services — California-licensed insurance brokerage serving contractors statewide. Phone: (858) 925-9555. Email: info@asenainsurance.com.
Asena Capital Insurance Services provides California insurance guidance for California contractors. Coverage needs depend on operations, employees, payroll, vehicles, contracts, claims history, policy terms, and underwriting. Request a review to discuss the appropriate coverage path for your business.
Workers' comp is usually the largest premium for a plumbing business with employees, and it is the one cost you can estimate from public data. The WCIRB advisory pure premium rates below took effect September 1, 2026.
The same 5183/5187 pair covers plumbing, HVAC equipment and refrigeration work. Sewer and underground utility work outside the building uses separate construction codes.
| Class code | Description | Rate per $100 payroll | Benchmark on $50,000 payroll | Benchmark on $100,000 payroll |
|---|---|---|---|---|
| 5183 | Plumbing, HVAC equipment, refrigeration — less than $35/hr | 5.716 | $2,858 | $5,716 |
| 5187 | Plumbing, HVAC equipment, refrigeration — $35/hr or more | 2.732 | $1,366 | $2,732 |
General liability is priced on revenue or payroll, your type of work and your claims history, not on a public rate table. That is why quotes for the same business can differ widely between carriers, and why comparing several markets matters.
Benchmarks are WCIRB advisory pure premium rates, not quotes. Your premium also depends on the carrier's filed rate, experience mod, minimum premium and fees.
Send us your details and a licensed broker will compare workers' comp, general liability, commercial auto and bond options for your plumbing business. Call (858) 925-9555 or use the short form (name, phone, email).
It depends on payroll and class code. Effective September 1, 2026, the WCIRB advisory pure premium rate for 5183 is $5.716 per $100 of payroll, a benchmark of about $5,716 on $100,000 of payroll before the carrier's own rate, your experience mod and fees.
5183 (Plumbing, HVAC equipment, refrigeration — less than $35/hr) and 5187 (Plumbing, HVAC equipment, refrigeration — $35/hr or more). Your carrier assigns the final codes from the work your employees actually do.
If you have employees you need workers' comp now. If you have none, your license can stay exempt until January 1, 2028, when SB 1455 requires workers' comp for every active license except joint ventures.
Your CSLB license number, estimated annual payroll by employee and hourly wage, annual revenue, vehicles and drivers, and claims from the last five years. Carriers will also ask about your service vs. new construction split, any sewer, gas-line or water-heater work, and whether you use subcontractors.
Plumber contractors in California should describe the work actually performed, the CSLB classification that applies, employees and payroll, subcontractors, vehicles, locations, contracts, and claims history before an insurance review. Coverage, limits, eligibility, pricing, and effective dates depend on the complete operation and underwriting; this page is not a binding quote or legal determination.
Prepare the legal entity, CSLB license and classification, description of plumbing installation, repair, service, and work at customer premises, employee duties and payroll, subcontractor practices, vehicles and equipment, locations, contract requirements, prior coverage, and claims.
No. The classification is one input. Actual operations, project mix, employees, subcontractors, vehicles, locations, contracts, losses, policy terms, and underwriting also affect the review.
The review may include General Liability, Workers' Compensation where applicable, Commercial Auto, tools or equipment, contractor license bonds, and contract-specific certificates or endorsements. The appropriate combination depends on the actual business.
Official references: California CSLB · CSLB workers' compensation requirements · California DIR employer information · CSLB licensing classifications