Quick Answer
Assembly Bill 5 (AB 5) codified the ABC test for worker classification in California. A worker is presumed an employee unless: (A) free from control, (B) performing work outside the hiring entity's usual business, AND (C) customarily engaged in independent business. Failing any one of the three makes the worker your employee — for wage/hour AND workers' comp. Call (858) 925-9555 for help structuring sub relationships properly.
The Three Prongs
A — Free from control: The sub controls how, when, and where the work is done. You give them the result, not the method.
B — Outside your usual business: The sub's services are different from what your business primarily does. A roofing company hiring a "roofer" sub fails Prong B almost automatically.
C — Independent business: The sub holds their own CSLB license, has their own insurance, advertises to other clients, has employees of their own, etc.
Why Prong B Is the Killer
For contractors, Prong B is hardest to satisfy. If you're a roofing GC and you hire a 1099 roofer, the work IS your usual business — so the sub fails the test and becomes your employee.
Workaround: California's "construction trucking" and "B2B" exceptions allow some flexibility — but only if every condition is met (proper licensing, separate business, no work for the GC's home office, etc.).
How This Interacts With WC
AB 5 reinforces the §2750.5 presumption. If the sub fails the ABC test: - They're your employee for wage/hour - They're your employee for WC - You owe back wages, OT, and penalties - Your WC policy may pay an injury claim — and your audit will add the payroll
How to Reduce Risk
- Only hire subs who hold their own CSLB license in the work scope
- Collect a COI showing active WC every time
- Pay by the project, not by the hour
- Don't dictate work methods, hours, or equipment
Sub structure risk? Call (858) 925-9555.
Related: Hiring 1099 Subcontractors · Workers' Comp Audit
Call (858) 925-9555 — sub structure guidance.