The Difference Between a Sub and a Labor Broker
Why this matters
"I've got a sub crew coming" and "I've got a guy who brings me bodies" sound like the same arrangement. They are not, and confusing them is how a shop backs into a payroll-tax bill, a workers-comp claim it did not expect, and a misclassification finding. A real subcontractor sells you a finished result and runs their own crew. A labor broker sells you bodies you direct, and the law may treat those bodies as your employees no matter what the invoice says. Knowing which one you are actually dealing with tells you who is on the hook when a worker gets hurt or an auditor comes calling.
Two different things you can buy
- A subcontractor sells a scoped result. You hire them to deliver a defined piece of work. They decide how to do it, bring their own crew and tools, carry their own insurance, and invoice for the job. You are buying an outcome.
- A labor broker sells hours of labor. They supply workers, and you direct those workers on your job, with your methods, on your schedule, often with your materials. You are buying bodies, not an outcome. The broker is a middleman between you and the people doing the work.
The test is simple: are you paying for a finished result, or for warm hands you tell what to do? That one distinction drives everything below.
Why the difference is not just semantics
When you direct the work, the law tends to treat the workers as yours, regardless of who signs their check. Two doctrines make this bite:
- Worker misclassification. If a "sub" is really just labor you control, the people are functionally your employees. That means the taxes, workers comp, and wage-and-hour rules you skipped are yours to owe, often with penalties and back interest, and the total usually dwarfs whatever the arrangement seemed to save.
- Joint employment. Even when a real staffing agency employs the workers, you can be treated as a joint employer of people on your job. If the broker did not actually carry workers comp, an injured worker's claim can land on you, and so can wage claims.
A true sub relationship keeps that liability on the sub. A loose labor-broker arrangement quietly parks it on you.
Field key: which one is this?
| Factor | True subcontractor | Labor broker |
|---|---|---|
| What you buy | A scoped, finished result | Hours of labor, bodies |
| Who directs the work | The sub | You |
| Whose tools and materials | Theirs, mostly | Often yours |
| Who carries workers comp | The sub, on their own crew | The broker, if anyone |
| How you pay | Per job or milestone, on their invoice | Per hour or per head |
| Who bears the risk of the workers | The sub | Often you |
| Classification exposure | Low, if genuinely independent | High |
The more a relationship sits in the right-hand column, the more it is your employment problem wearing a sub's paperwork.
When a labor broker is legitimate, and when it is a trap
Buying labor is not automatically wrong. The question is who stands behind those workers.
- Legitimate: a real staffing agency or temp firm that makes the workers its own W-2 employees, withholds their taxes, and carries workers comp and liability on them. You direct the work, and that is fine, because someone with real coverage is legally the employer. You are renting properly-employed labor.
- A trap: an informal broker who "brings guys" and wants to be paid in a lump for their hours, with no proof those workers are anyone's employees and no comp coverage on them. If one gets hurt on your job, you may be the deepest pocket standing. If an auditor looks, they may all be your unreported employees.
If you need labor rather than a scoped result, use a staffing firm that employs and insures its people, and get proof of it. Do not hand your liability to a middleman who carries none.
How to keep yourself on the right side
- Decide what you actually need. If you need a result, hire a real sub and let them run it. If you need hands, use a staffing agency that W-2s and insures them.
- Match the paperwork to the reality. Calling someone a sub does not make them one. An auditor looks through the label to how the relationship actually works. See related: W-2 Employee vs 1099 Contractor Classification.
- Get proof of coverage on the workers, a certificate of insurance for a sub's crew or the agency's employer coverage, before anyone sets foot on your job.
- If you direct the work, expect to be treated as the employer, and make sure a properly-insured entity actually stands behind those workers so it is not you by default.
The judgment to bank
A sub sells you a result and keeps the liability for the people doing it. A labor broker sells you bodies, and unless a real employer with real coverage stands behind them, the liability for those people is yours the moment you start directing them. Know which one you are buying before the work starts, because the difference does not show up on the invoice. It shows up when someone gets hurt or an auditor asks who the employer really was.
References
- IRS guidance on worker classification and independent-contractor status
- U.S. Department of Labor guidance on joint employment and staffing arrangements
- Trade-standard practice for staffing-agency and subcontractor insurance verification
- See related: W-2 Employee vs 1099 Contractor Classification; Documenting a Sub's Work to Protect Yourself