Payroll, Workers' Comp, and Employment Rules for C-10 Contractors
The day you hire your first helper, a C-10 electrical contractor stops being just an electrician and becomes an employer — with payroll, workers' compensation, and a stack of California employment rules attached. These topics are heavily tested on the Law and Business exam, and getting them wrong in real life is expensive. Here is the plain-English version.
This is an overview to help you study and plan, not legal or tax advice. Employment and comp rules change frequently in California; confirm current requirements with the CSLB at cslb.ca.gov and the relevant state agencies.
Workers' compensation: the one that has teeth
Workers' compensation covers employees who are injured on the job. In California, if you have employees, you must carry it — there is no opting out. For contractors the stakes are higher than for most businesses: the CSLB has moved toward requiring workers' comp coverage for more licensees, including some without W-2 employees. The old assumption that a solo owner is automatically exempt no longer safely holds for every electrical licensee.
Do not guess here. Confirm your specific obligation with the CSLB before assuming an exemption applies — coverage you should have carried, or an exemption filed incorrectly, can suspend your license or leave you personally exposed for an injury. Comp fits alongside the bond and insurance requirements as part of the compliance layer that keeps your license active.
Employee vs. independent contractor
This is where contractors get burned. You cannot simply call a worker an independent contractor to avoid payroll taxes and comp. California uses a strict ABC test: a worker is presumed an employee unless the hiring business proves all three — (A) the worker is free from your control and direction, (B) the work is outside your usual course of business, and (C) the worker is independently established in that trade.
For an electrical contractor, part B is the killer: a helper wiring your jobs is doing the exact work your business exists to do, so they almost always fail the test and count as an employee. Misclassifying them means unpaid payroll taxes, penalties, and comp exposure. When in doubt, treat them as an employee.
Payroll taxes and the paperwork
Once you have employees, you are responsible for withholding and remitting payroll taxes — federal and state income tax withholding, Social Security and Medicare, and California's unemployment and disability contributions. You register as an employer, file returns on a schedule, and keep records. Miss deposits and the penalties compound quickly. Most contractors hand this to a payroll service or bookkeeper, but you are the one accountable — which is exactly why the Law and Business exam tests whether you understand the basics.
Overtime, breaks, and wage rules
California wage-and-hour law is stricter than federal. Non-exempt employees generally earn overtime past 8 hours in a day — not just 40 in a week — with daily double-time thresholds and required meal and rest breaks. Getting these wrong invites wage claims. You do not need to memorize every threshold for the field, but you need to know the rules exist and run your crew accordingly.
Prevailing wage on public works
Take a public-works project — schools, government buildings, public infrastructure — and a different rule kicks in: prevailing wage. You must pay the state-determined prevailing wage for the trade and area, keep certified payroll records, and often register as a public-works contractor. The rates are higher than typical private-job pay and the recordkeeping is strict. If you plan to bid public work, this is not optional knowledge.
Why this is half the license
Notice the pattern: none of this is about wiring. It is about running a lawful business — which is the entire point of the Law and Business exam and the reason a C-10 requires two exams, not one. These employment rules sit right next to contract and lien law as the business knowledge the state expects a licensed contractor to have.
The bottom line
Payroll, workers' comp, and classification are where a lot of new contractors quietly break the law without meaning to. Learn the framework for the exam, then build your real business on it: carry the comp coverage you are required to, classify workers honestly, follow California's wage rules, and keep clean records. It is less exciting than the trade — but it is exactly half of what your license certifies. And because these rules change often, verify the current specifics with the CSLB and the state agencies before you rely on any figure here.