Reference
What does co-employment actually mean?
The short answer
Co-employment means two entities hold employer responsibilities for the same worker simultaneously, divided by a client service agreement. The PEO generally takes payroll tax filing under its own FEIN, benefit plan sponsorship, workers’ compensation coverage and certain statutory notices. You remain the worksite employer with direction and control — hiring, supervision, discipline, termination — and the liability attached to those decisions stays substantially with you.
Two employers, one worker, by agreement
Co-employment is not a metaphor for a close vendor relationship. It is a specific allocation of employer obligations between two entities, and the document that performs the allocation is the client service agreement. Everything meaningful about a given arrangement is in that document, not in the category.
Which means two PEO arrangements can differ substantially from one another. Reading the agreement is not diligence theatre; it is the only way to know what you have actually bought.
What generally sits with the PEO
Payroll processing and the deposit and filing of employment taxes under its own federal employer identification number. Sponsorship and administration of the benefit plans your employees enrol in. Workers’ compensation coverage in most arrangements. Certain statutory notices and postings. Frequently, unemployment claims administration.
What stays with you, always
Direction and control of the work. You decide who is hired, what they are paid, what they do, how they are supervised, whether they are disciplined and whether they stay. Nothing in a co-employment agreement changes that, and no provider offers to take it.
The liability attached to those decisions follows them. Discrimination, harassment, retaliation and wrongful termination arise from how the work is directed. So does much wage-and-hour exposure — a misclassification is a decision about a role, and the PEO processed the payroll it was instructed to process.
"The PEO handles compliance" is doing a great deal of unexamined work in most sales conversations.
The shared middle
Some obligations genuinely sit in both places, and this is where agreements differ most. Employment practices liability insurance may be provided, and its limits and exclusions repay reading. Indemnification runs in both directions and the two clauses are rarely symmetrical. Handbook and policy authorship is often the PEO’s, while enforcement is yours — a split that matters when a policy is applied inconsistently.
What this changes in practice
A good PEO reduces risk substantially, but through process rather than transfer: better documentation, consistent onboarding, filings that happen on time, and access to people who have seen the situation before. That is worth a great deal. It is a different proposition from being insulated, and buyers who believe they have bought the second are the ones who are surprised.
The practical test before signing: for each obligation that worries you, find the clause. If it is not in the agreement, it did not transfer, whatever the conversation implied.
| Obligation | Generally the PEO | Generally you |
|---|---|---|
| Payroll tax deposit and filing | Yes | — |
| Benefit plan sponsorship | Yes | — |
| Workers’ compensation coverage | Usually | — |
| Hiring, discipline, termination | — | Yes |
| Supervision and direction | — | Yes |
| Exempt classification decisions | — | Yes |
| Discrimination and harassment claims | Shared, per agreement | Substantially yes |
| Handbook authorship / enforcement | Often authors | Enforces |
Common questions
Are our employees still our employees?
Does co-employment protect us from an employment lawsuit?
Who is responsible if the PEO files something late?
What should we read most carefully in the agreement?
Where this sits
This page supports PEO / ASO Advisory — the practice that does this work.
