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California Subcontractor Insurance Requirements
What coverage general contractors should require from subcontractors on California job sites — including the CSLB bond requirement and why California's WC rules leave no room for exceptions.
In this guide
Standard Insurance Requirements for California Subcontractors
California has some of the most stringent contractor compliance requirements in the country. The CSLB mandates both insurance and bonding as conditions of licensure, and state law requires workers' compensation for virtually all employers.
| Coverage type | Typical minimum | What it covers |
|---|---|---|
| Commercial General Liability (CGL) | $1M per occurrence $2M aggregate | Bodily injury and property damage from the sub's operations, completed work, and products |
| Workers' Compensation | California statutory limits | Required by law for all CA employers with 1+ employees — no exceptions in construction |
| Employer's Liability | $1M / $1M / $1M | Lawsuits from injured employees beyond WC statutory benefits (bundled with WC) |
| Commercial Auto Liability | $1M combined single limit | Bodily injury and property damage from vehicles used in operations |
| Contractor's License Bond | $25,000 (CSLB requirement) | Protects against contractor non-performance or defective work — required for CSLB licensure |
| Umbrella / Excess Liability | $2M–$5M (project dependent) | Excess coverage above CGL, auto, and employer's liability limits |
Workers' Compensation — California's Rules
California requires workers' compensation insurance for all employers with one or more employees. Unlike Texas (where WC is optional) or many other states (where thresholds start at 3–5 employees), California leaves essentially no room for exemptions in practice.
Who must carry it
- All employers with at least one part-time or full-time employee
- Contractors who hire workers, even occasionally or informally
- Corporate officers are generally covered unless they own more than 15% of the corporation's stock
Sole proprietors and single-member LLCs
A sole proprietor or single-member LLC without employees is not required to carry WC in California. However, because California's AB5 and related worker classification laws make it harder to use 1099 independent contractors, many sole proprietors who hire helpers on an informal basis technically trigger the WC requirement without realizing it.
Contractor's License Bond — The CSLB Requirement
Every licensed contractor in California must maintain a $25,000 contractor's license bond issued to the state as a condition of CSLB licensure. This bond protects consumers and project owners — not the GC directly — but its presence signals that the sub is maintaining their license in good standing.
What the CSLB bond covers
The bond can be used to compensate property owners for losses caused by contractor non-performance, abandonment, or defective work. It is not a substitute for general liability insurance — the two serve different purposes and are both required.
How to verify bond status
Bond status is visible directly on the CSLB license record at cslb.ca.gov. A license record that shows "Bond: No Bond on File" means the contractor's license may be suspended or in jeopardy — this is an immediate red flag. Verify California contractor license and bond status →
Additional Insured and Waiver of Subrogation
Additional insured endorsement
Require that your company (and the project owner where applicable) be named as additional insured on the sub's CGL and auto policies. Specify primary and non-contributory status. In California, completed operations coverage as additional insured is especially important given the state's long statute of repose for construction defect claims.
Waiver of subrogation
Require a waiver of subrogation on WC and CGL policies in your favor. California courts have generally upheld these waivers in commercial construction contracts when properly documented.
Adjusting Minimums by Project Type
| Project type | Suggested CGL minimum | Suggested umbrella |
|---|---|---|
| Residential remodel / small commercial | $1M / $2M | $1M |
| Mid-size commercial ($1M–$10M contract value) | $2M / $4M | $2M–$5M |
| Large commercial / mixed-use ($10M+) | $2M / $4M | $5M–$10M |
| Public works / state agency work | Per contract (often $5M+) | Per contract |
| High-hazard trades (demolition, structural, hazmat) | $2M / $4M | $5M+ |
California public works contracts are governed by the Public Contract Code and typically specify their own minimum insurance requirements. These flow directly into your subcontracts — there is no discretion to reduce them.
Collecting and Tracking Certificates of Insurance
California's project sizes, construction defect exposure, and regulatory environment make COI management more consequential than in most other states. A lapsed certificate or missing endorsement on a large California project creates real financial risk.
- Collect a COI before work begins and verify the CSLB license alongside it — bond status, license classification, and WC coverage are all visible in the CSLB record. CA license lookup →
- Track policy expiration dates and set reminders 45–60 days in advance, given the lead time some insurers need to issue renewal certificates.
- For large projects or long-running subcontracts, require mid-project certificate refreshes — don't wait for expiration notices.
- Store COIs in a way that's audit-ready — California DLSE and Labor Commissioner investigations can request compliance documentation going back years.
Use magic-link vendor self-service to have California subs upload their own documents directly into your dashboard. Automated alerts notify you at 90, 60, 30, and 7 days before any COI or license expires, and per-project compliance views show coverage status across all active job sites.
Track COIs, bonds, and licenses for all your California subs
TrackMyVendor monitors certificates of insurance and CSLB license status automatically — including bond status — so nothing lapses unnoticed. Free for your first 25 contractors.
Start free →Frequently Asked Questions
Is workers' compensation required for subcontractors in California?
What is the CSLB contractor's license bond and do I need to verify it?
What is the minimum general liability insurance for a subcontractor in California?
What does "completed operations" coverage mean and why does California require it?
Does a sub's COI confirm their California CSLB license is active?
What is AB5 and how does it affect subcontractor classification in California?
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