Co-Employment
Co-employment in staffing explained: who does what between agency and client, how it differs from joint employment, the real risks, and how to keep lines clear.September 25, 2026
5 min read
Running an Agency
Written by the NextCrew team
Definition
Co-employment is a relationship in which two businesses share employer rights and responsibilities for the same people. In staffing, the agency is the employer of record that hires and pays the Crew Member, while the client directs their daily work at its site, so both can carry legal obligations.
Co-employment is not a problem in itself; it is how temporary staffing works. The risk comes when the line between what the agency does and what the client does gets blurry, and a court or government agency decides the client is also an employer for a particular law. That finding has a name: joint employment.
Who handles what in a staffing co-employment relationship?
| Responsibility | Staffing agency | Client (host employer) |
|---|---|---|
| Recruiting, screening, hiring | Yes | Sets the job requirements |
| Paying wages, withholding taxes | Yes (employer of record) | No |
| Workers' comp and unemployment insurance | Yes | Keeps its own for its own staff |
| Day-to-day direction of the work | Sets expectations | Yes |
| Site safety and site-specific training | Shares it | Shares it |
| Approving hours | Reviews and pays | Often approves |
| Discipline and ending employment | Yes | Can end the assignment |
A typical split, not a rule. Your staffing agreement sets the real one, so write it down there.
On safety, both sides answer for it. OSHA's guidance on temporary workers treats the staffing agency and the host employer as jointly responsible for a safe workplace, with the host usually handling site-specific hazards and training.
What is the difference between co-employment and joint employment?
Co-employment describes the business arrangement; joint employment is a legal conclusion that both businesses are liable under a specific law. Two companies can be in a co-employment arrangement without anyone ever finding joint employment. The finding usually comes up in a dispute over overtime, discrimination or union organizing, and the test depends on the law involved.
The tests keep moving. Joint employer standards under federal wage and labor law have been rewritten, rescinded and litigated several times in recent years. The practical factors stay similar: who hires and fires, who sets pay, who controls schedules and conditions, and who keeps the records.
Is co-employment the same as a PEO or an employer of record?
No, though all three share employer duties. A professional employer organization (PEO) co-employs a company's existing staff to take over payroll, benefits and HR. An employer of record takes on the legal employer role, often for people the client found itself. A staffing agency recruits the people, employs them and places them with clients. Payrolling sits closest to the employer-of-record model.
What are the risks of co-employment?
- Wage and hour. If both businesses are joint employers, both can be liable for unpaid overtime.
- Discrimination and harassment claims. A Crew Member can bring a claim against the client as well as the agency.
- Benefits eligibility. The classic case is Vizcaino v. Microsoft, where long-term contractors paid through agencies argued they were entitled to employee benefits. It settled in 2000 for about $97 million, and it is why many companies cap assignment length.
- Safety. Both can be cited for a hazard at the site.
- Labor relations. A joint employer finding can bring a client into collective bargaining it did not expect.
How do agencies and clients manage co-employment risk?
- 1Put the split in the contract
Say who recruits, pays, trains, disciplines and approves hours. Vague contracts make the facts decide.
- 2Keep HR with the agency
Pay questions, complaints and discipline go through the agency, not the client's managers.
- 3Onboard through the agency
The agency's paperwork, policies and acknowledgments, applied the same way for every Crew Member.
- 4Watch assignment length
Long assignments with no end date look like employment. Set a review point or plan a conversion; see conversion fee.
- 5Keep records
Who approved hours, who raised an issue, what the agency did about it. Records are what a dispute runs on.
Bottom line: co-employment is the normal state of staffing. Joint employment is what happens when nobody wrote down who does what. Keep the agency in charge of the employment relationship and the client in charge of the work.
How NextCrew helps keep the lines clear
NextCrew does not decide employment status, and it is not legal compliance software. It keeps the agency as the system of record for the employment relationship:
- Site rules through the agency. Each client's Policies and Procedures (entrance, check-in, dress, safety) are set on the client record, and every Crew Member booked on that client's job sees them in the app before the shift.
- Approvals on record. Clients can approve or decline timesheets in their portal, so there is a clear record of who approved which hours.
- An audit trail. Notes on any Crew Member, client or job are timestamped and attributed automatically.
- Records that outlast the assignment. When a Crew Member is terminated, their job history, timesheets and documents stay in the system.
See the staffing CRM for how client records and portals are set up.
Frequently asked questions
Related terms
- Payrolling: an agency or provider employs people the client already found.
- Conversion fee: what a client pays to hire a Crew Member directly.
- Workers' comp class codes: how the agency's workers' comp premium is classified.
- Staffing agency license: the state registrations an agency needs to operate.
- MSP: a managed service provider that runs a client's contingent workforce program.
- Employer of record vs PEO vs staffing agency: the three models side by side, including where a PEO fits.
General information, not legal advice. Joint employment rules vary by law and state; ask employment counsel about your contracts.