Co-employment is the term the PEO industry uses for a contractual relationship in which a business and a professional employer organization (PEO) divide specified employer responsibilities for the same workforce.
The client company still runs the business and manages employees day to day. The PEO handles the employment services assigned to it in the client service agreement, which can include payroll administration, employee benefits, HR support, workers’ compensation, and compliance assistance.
The important nuance is that co-employment is not a universal legal status. The IRS does not recognize “co-employer” as a separate federal tax category, and different employment laws can apply their own tests for determining which entity is legally responsible.
How does co-employment work?
In a PEO arrangement, the client and the PEO sign a client service agreement, often called a CSA. That contract describes which responsibilities each party will handle.
NAPEO defines co-employment as a contractual allocation and sharing of employer responsibilities between the PEO and the client. The client generally keeps control over business operations, day-to-day supervision, job assignments, performance decisions, and compensation decisions. The PEO provides the employment-related services listed in the agreement.
The exact split varies by provider, contract, state, and service package. A PEO relationship should therefore be evaluated by reading the agreement, not by assuming every PEO takes on the same responsibilities.
Who is responsible for what in a co-employment relationship?
| Area | Typical operating owner | Important caveat |
|---|---|---|
| Business operations | Client | The PEO normally does not run the client’s products, services, strategy, or customer work. |
| Day-to-day management | Client | The PEO may provide HR guidance, but managers still direct and supervise the work. |
| Hiring and termination | Usually the client | The PEO may also have hiring, discipline, and termination rights under state law or the CSA. |
| Compensation | Usually the client | The client generally sets pay; the PEO may process payroll, deductions, and withholding. |
| Payroll and taxes | Often PEO-administered | Federal tax liability depends on the actual third-party payer arrangement, not the co-employment label. |
| Benefits | Often PEO-administered | Plan sponsorship, carrier, eligibility, employer contributions, and fiduciary roles vary by arrangement. |
| Workers’ compensation and safety | Shared or arrangement-dependent | The client controls the workplace; coverage, claims, risk services, and legal duties vary by state and contract. |
This division is a practical summary, not a legal rule. Some responsibilities may be shared, and state or federal law can assign obligations differently from the contract.
Our PEO responsibilities guide goes deeper into the responsibility split between the client and the PEO.
What if the co-employment agreement is silent or conflicts with the law?
The client service agreement matters, but it is not the only source of responsibility. State statutes and federal law can assign duties regardless of what the contract says.
Texas, Washington, and Pennsylvania illustrate the pattern. Their PEO laws allocate duties through the professional employer agreement, but they also preserve obligations imposed by law. Washington expressly says the client keeps employer obligations that are not specifically allocated to the PEO by the agreement or state law. Pennsylvania similarly limits the PEO to duties assigned by statute or the professional employer agreement and keeps other employer responsibilities with the client.
The practical rule is simple: the CSA can divide responsibilities, but it cannot erase duties that applicable law places on either party. If the agreement does not address a responsibility, do not assume the PEO owns it. Check the governing state law and the specific employment law involved.
Does co-employment mean you lose control of your employees?
No. In the typical PEO model, the client company continues to manage the workforce. Managers decide what work employees perform, supervise them, set priorities, evaluate performance, and make business decisions.
The PEO’s role is usually concentrated on employment administration and the responsibilities assigned in the CSA. NAPEO specifically states that the client retains responsibility for business operations, day-to-day supervision, job assignments, employee reviews, and decisions about salary and benefit offerings.
That distinction matters because a PEO is not the same thing as a staffing agency. A staffing company generally supplies workers to a client. A PEO works with a client’s existing workforce and provides HR and employment services around that workforce.
Is co-employment the same as joint employment?
No. The terms are sometimes used loosely, but they should not be treated as interchangeable.
PEO co-employment describes the contractual service relationship between a PEO and its client. Joint employment is a legal concept used under specific employment laws to determine whether two or more businesses are legally responsible for the same workers.
For example, the U.S. Department of Labor defines joint employment as a situation in which two or more employers share legal responsibility for the same employee. Different statutes and agencies can apply different tests, and those standards can change over time.
The Department of Labor announced a proposed joint-employer rule on April 22, 2026, addressing standards under the FLSA, FMLA, and MSPA. The proposal concerns legal joint-employment tests, which are separate from the PEO industry’s contractual co-employment model. Calling an arrangement “co-employment” does not decide whether joint-employer liability exists under a particular law. Check the Department’s current rulemaking status before relying on a proposed standard.
Does co-employment make the PEO the employer of record?
Not in a way that settles every legal question. Some PEO materials use “employer of record” to describe payroll or administrative functions, but the phrase does not determine employer status under federal tax or employment law.
For federal employment taxes, the IRS applies common-law and statutory rules to the actual arrangement. A client can remain the common-law employer even when a PEO pays wages or files employment-tax returns. That is different from an employer of record service, where the EOR is the legal employer for workers it employs on a client’s behalf.
How does co-employment affect payroll taxes?
This is one of the areas where industry terminology and federal law need to be kept separate.
The IRS says the Internal Revenue Code does not define or recognize “co-employer” as a federal tax status. A client can remain the common-law employer even when a PEO performs payroll and employment-tax functions.
Depending on the arrangement, the PEO may have tax responsibilities as a third-party payer, section 3504 agent, statutory employer, or certified professional employer organization (CPEO). CPEOs receive specific federal employment-tax treatment under the Internal Revenue Code.
The safest approach is to verify how the provider is structured and which tax rules apply rather than assuming that a co-employment contract automatically transfers federal tax liability.
What does co-employment mean for employees?
For employees, daily management usually stays with the client business. The same managers generally assign work, supervise performance, approve schedules, and make workplace decisions.
What may change is the administrative experience. Depending on the arrangement, employees may receive payroll documents through the PEO, enroll in benefits through a PEO portal, contact the PEO for certain HR or benefits questions, or see the PEO involved in workers’ compensation administration. The provider may also supply the HR platform used for some of these processes.
Employees should know who handles each type of question. A useful onboarding explanation covers where to check pay, where to enroll in benefits, who handles leave or HR questions, how workplace issues are escalated, and which decisions still come from the employee’s manager or company.
Co-employment does not mean the employee stops working for the client business in the everyday sense. The legal result depends on the contract and the law being applied, which is why labels alone can be misleading.
What are the benefits of co-employment?
- Less payroll and HR administration for the client business
- Access to employee benefits offered through some PEO arrangements
- HR expertise and support for routine employment questions
- Workers’ compensation administration and risk support
- More structured HR processes as the business grows
- Potentially fewer separate HR vendors to manage
These benefits depend on the provider, service package, workforce, and contract. Our guide to the benefits and drawbacks of a PEO covers them in more detail.
What are the risks or limitations of co-employment?
- Responsibilities can be misunderstood if the CSA is vague or poorly reviewed
- The client can still retain legal obligations even when the PEO handles the process
- Some benefits, insurance, or HR workflows may be tied closely to the PEO
- Service problems can affect several HR functions at once
- Changing or leaving a PEO can require coordinated payroll, benefits, tax, and data transitions
The most important protection is clarity. Before signing, make sure the CSA explains who is responsible for payroll, tax filings, benefits, workers’ compensation, HR support, workplace safety, recordkeeping, and employee decisions.
A simple co-employment example
Imagine a 30-person field service company that signs with a PEO. The company’s managers still schedule technicians, supervise jobs, approve time, set pay, and decide who to hire or terminate.
The PEO processes payroll, administers the benefit plans in the agreement, provides HR support, and handles the workers’ compensation services assigned to it.
Both organizations are involved in the employment relationship, but for different purposes. The contract allocates responsibilities, while applicable law still determines the legal obligations of each party. If a technician forgets to clock out, the company manager checks and approves the corrected hours before sending them to the PEO for payroll.
What should you check in a co-employment agreement?
- Which duties are assigned to the PEO and which stay with your business?
- Who handles payroll tax filings, payments, and notices, and how will you confirm taxes were filed and paid?
- Whose EIN appears on payroll and tax documents?
- How are employee benefits and workers’ compensation structured?
- Who handles workplace safety and claims?
- Who owns hiring, discipline, termination, and compensation decisions?
- Which HR systems and workflows are required?
- What happens to payroll, benefits, and employee data if you leave the PEO?
How Connecteam fits alongside a co-employment arrangement
Connecteam is not a PEO and does not create a co-employment relationship. It can complement a PEO by handling day-to-day workforce processes that still sit with managers, especially for hourly and deskless teams.
That can include scheduling, time tracking, PTO workflows, employee communication, forms, tasks, and payroll-ready timesheets. The PEO continues handling the employment services assigned in the CSA.
The practical goal is to make sure accurate workforce data moves cleanly from operations into the PEO’s payroll and HR processes.
Frequently asked questions
Is co-employment legal?
Yes. PEO co-employment is a widely used contractual business model. The legal effect of the arrangement still depends on the contract, state law, and the specific federal or state employment law involved.
Does co-employment make the PEO my employees’ employer?
The PEO industry describes both the client and PEO as co-employers for different purposes, but that label does not decide employer status under every law. For federal employment taxes, for example, the IRS applies its own common-law and statutory rules.
Who can fire an employee in a co-employment arrangement?
The client typically makes the business decision to hire or terminate workers, while the PEO may have contractual responsibilities around the employment process. The exact allocation depends on the agreement and applicable law.
Who controls employee pay?
The client business generally decides compensation, while the PEO may process payroll and administer deductions and tax withholding according to the service agreement.
Is a PEO the same as a staffing agency?
No. A staffing agency supplies workers to a client. A PEO typically works with the client’s existing workforce and provides employment and HR services around that workforce.
The bottom line
Co-employment is best understood as a contractual allocation of employer responsibilities between a business and a PEO. The client keeps running the business and managing employees, while the PEO takes on the services defined in the client service agreement.
The contract does not override applicable law, and the term “co-employer” does not by itself determine tax or employment-law liability. Review the CSA carefully and verify how each responsibility is treated under the laws that apply to your workforce.
