Hiring Subcontractors Without Workers' Comp in California: The Risk You're Taking

Hiring subcontractors is standard practice in California construction — but if those subs don't carry their own Workers' Compensation insurance, you could be on the hook for their injuries. This is one of the most misunderstood areas of California contractor insurance, and the consequences of getting it wrong can be financially devastating.

California Labor Code §3706: The Rule You Need to Know

Under California Labor Code §3706, if you hire a subcontractor who doesn't carry their own Workers' Compensation insurance, that subcontractor may be reclassified as your employee in the event of an injury. That means their medical bills, lost wages, and disability payments become your responsibility — even if you paid them as an independent contractor on a 1099.

This isn't a technicality. California courts and the Workers' Compensation Appeals Board apply this rule regularly. The state's position is straightforward: someone has to be responsible for injured workers, and if the sub doesn't have coverage, the responsibility falls up the chain.

The ABC Test and Worker Classification

California's AB 5 law (effective 2020) established the "ABC test" for worker classification. To treat a worker as an independent contractor rather than an employee, you must demonstrate all three of the following:

• A: The worker is free from your control and direction in performing the work
• B: The worker performs work outside the usual course of your business
• C: The worker is customarily engaged in an independently established trade or business

For most construction subcontractors, the "B" prong is the problem. If you're a general contractor and you hire a framing sub, that framing work is arguably within the usual course of your construction business — which means the sub may not pass the ABC test and could be classified as your employee.

What Happens If an Uninsured Sub Gets Injured on Your Job Site

If an uninsured subcontractor is injured while working on your project, here's what can happen:

1. The sub files a Workers' Comp claim — and since they have no policy, the claim comes to you
2. Your WC carrier investigates and may deny the claim if the sub was truly independent
3. The sub sues you directly in civil court for negligence
4. The CSLB may investigate your license for failure to ensure WC compliance on your job site
5. You may face penalties from the California Labor Commissioner

Even if you ultimately win the legal battle, the cost of defending yourself can easily exceed $50,000 — and that's before any judgment or settlement.

How to Protect Yourself When Hiring Subs

• Always require a Certificate of Insurance before a sub starts work. The COI should show active Workers' Comp coverage with your company listed as certificate holder.
• Verify the COI is current. A COI can be issued for a policy that has since lapsed. Call the carrier directly or use ACORD verification if you have any doubts.
• Keep copies of all sub COIs. If a claim arises, you'll need to prove the sub had coverage at the time of the incident.
• Include WC requirements in your subcontracts. A written subcontract that requires the sub to maintain WC coverage gives you additional legal protection.
• Consider an owner-controlled insurance program (OCIP) for larger projects. An OCIP covers all subs under a single policy — eliminating the COI verification burden.

What About Sole Proprietor Subs?

Sole proprietors with no employees are generally exempt from carrying Workers' Comp in California — but they can voluntarily elect coverage. If you hire a sole proprietor sub who has no WC coverage, you're taking on the same risk described above. Many GCs and project owners now require even sole proprietor subs to carry WC, or to provide a signed WC exemption certificate from the CSLB.

Get Help Structuring Your Sub Insurance Requirements

Asena Capital Insurance Services helps California contractors set up proper subcontractor insurance requirements — including COI collection systems, contract language, and verification processes. Call us at (858) 925-9555 to discuss how to protect your business when working with subs.