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Contractors in Tracy, Manteca, Lathrop and Mountain House: workers' comp and the certificate your GC asks for

Updated November 3, 2026

This page is for licensed contractors and subs working jobs in Tracy, Manteca, Lathrop and Mountain House. It covers when California requires workers' compensation, what happens to a CSLB exemption when you hire, what a general contractor usually checks on a certificate of insurance (COI), and what we need to quote. Insurance City is a licensed agency in Stockton.

Request a contractor quote (209) 670-1556 · Insurance City Agency, LLC · CA License #6003045

When does California require a contractor to carry workers' comp?

Labor Code §3700 requires every California employer to carry workers' compensation or hold a state certificate to self-insure. For licensed contractors, Business and Professions Code §7125 and the Contractors State License Board (CSLB workers’ compensation requirements) add more: certain license classifications, including C-8 concrete, C-20 HVAC, C-22 asbestos abatement, C-39 roofing and tree service (C-61/D-49), must keep workers' comp on file even with no employees. Other licensees with no employees can file an exemption. Under current law, the no-employee exemption ends January 1, 2028, with a narrow joint-venture exception.

What happens to a workers' comp exemption when you hire?

A CSLB exemption only fits a license with no employees. Once you hire, the exemption no longer applies, and CSLB requires proof of workers' comp coverage on file within 90 days of the change. A license that relies on a Responsible Managing Employee (RME) cannot use the exemption either. Plan the policy before the first payroll, not after. Our exemption guide covers the filing steps.

Note: classification rules and dates change. Check your license on the CSLB site before relying on this page; the CSLB record controls.

What does a GC usually check on your certificate of insurance?

General contractors, property managers and developers in these cities usually send an insurance exhibit with the subcontract. Read it before you call us, then check the certificate against it:

1. Certificate holder: the exact legal name and address the contract asks for.
2. Additional insured: the GC or owner named on your general liability by endorsement, if the contract requires it. The certificate alone does not add anyone.
3. Waiver of subrogation: on general liability and workers' comp, if the contract asks for it. This also needs an endorsement.
4. Workers' comp: a current policy, or your CSLB exemption if you truly have no employees and the contract allows it.
5. Commercial auto: if your trucks or vans go to the jobsite.
6. Policy dates: every policy in force for the full job, not expiring mid-project.
7. Limits: the limits the contract states. We do not guess limits; the contract sets them.

A certificate is a summary for information only. It does not change or extend the policy; the endorsements do. More on that in our certificate of insurance guide and the glossary entry.

What do we need from you to quote?

• Your CSLB license number and classifications.
• Estimated payroll for the next twelve months, split by type of work, plus any subcontractor costs.
• Three to five years of loss runs from current or prior insurers, if you have them.
• The insurance exhibit from the contract you are bidding.
• Vehicles used for work, with the drivers.

Send these through our secure contact form, not by plain email. To understand how payroll drives the premium, try the workers' comp cost calculator; it shows how the math works, not a quote.

Related: workers' comp in Stockton and contractor general liability.

Frequently asked questions

Do I need workers' comp as a California contractor with no employees?

Usually you can file a CSLB exemption, but certain classifications, including C-8, C-20, C-22, C-39 and tree service, must carry workers' comp regardless. Under current law, the no-employee exemption ends January 1, 2028, except for certain joint ventures.

What happens to my exemption if I hire someone?

The exemption stops fitting once you have an employee. CSLB requires proof of workers' comp on file within 90 days. Set up the policy before the first payroll.

Does a certificate of insurance make the GC an additional insured?

No. A certificate summarizes coverage for information. Additional insured status and waiver of subrogation come from endorsements on the policy.

How do I start a contractor quote with Insurance City?

Use the secure contact form or call (209) 670-1556. Have your CSLB number, payroll estimate by type of work, loss runs and the contract's insurance exhibit ready.

Sources

• California Legislative Information: Labor Code §3700 and Business and Professions Code §7125. Checked 11/2/2026.
• Contractors State License Board: CSLB workers’ compensation requirements. Checked 11/2/2026.

Related

• Workers' comp exemption for California contractors
• Certificate of insurance guide
• Workers' comp cost calculator
• Workers' comp insurance in Stockton
• Leer en español

Reviewed by Santo Militello, California-licensed Property & Casualty agent (CA License #1737723), owner of Insurance City Agency, LLC — CA Insurance License #6003045. Phone (209) 670-1556. Insurance City, 956 W Robinhood Dr, Stockton, CA 95207.