A plain-language guide to professional employer organizations: co-employment, what a PEO does and does not do, certified PEOs, pros and cons and how to evaluate one.
In a PEO arrangement, your employees are co-employed by your company and the PEO. The responsibilities are split by a written client service agreement:
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| Your business | The PEO |
|---|---|
| Hiring, firing and day-to-day supervision | Payroll processing and payment |
| Setting pay rates, schedules and duties | Filing and paying payroll taxes, often under the PEO’s tax ID |
| Workplace safety and operations | Sponsoring employee benefit plans |
| Recording hours worked accurately | Workers’ compensation coverage in many states |
| Compliance with most workplace laws | HR administration, documents and support |
The exact split varies by PEO, by service level and by state. Read the agreement closely. Your business usually remains responsible for many legal obligations, including wage and hour compliance, which depends on the accuracy of the hours you report.
Since 2014, the IRS has run a voluntary certification program for PEOs. A certified professional employer organization (CPEO) must meet IRS requirements on finances, background and reporting. When a CPEO pays wages to your worksite employees, it is generally treated as solely liable for federal employment taxes on those wages. That gives clients more certainty than with a non-certified PEO, where the client may remain liable if the PEO fails to pay. The IRS publishes a list of CPEOs on its website. Certification is not a guarantee of service quality, but it is a useful check. You can also ask any PEO for evidence of its financial stability and for confirmation that it is registered or licensed in the states where you have employees, since many states regulate PEOs.
| Option | What you get | Employment relationship |
|---|---|---|
| PEO | Payroll, benefits, workers’ comp and HR under co-employment | Shared (co-employment) |
| Payroll service | Payroll processing and tax filing | You remain sole employer |
| HR outsourcing (ASO) | HR and payroll administration without co-employment | You remain sole employer |
| Employer of record (EOR) | A provider is the legal employer, often for staff in other countries | Provider is the employer |
| In-house HR and software | Full control, your own benefits and systems | You remain sole employer |
| Advantages | Drawbacks |
|---|---|
| Access to larger-group benefit plans | Fees can add up as headcount grows |
| Less administrative work for owners | Less control over benefit plans and HR systems |
| Payroll tax filing handled | Leaving a PEO can be disruptive, especially mid-year |
| HR expertise without hiring HR staff | Shared liability is defined by the contract, not by default |
| Help with multi-state compliance | Plan options and service quality vary widely |
Moving to a PEO is a project, not a form. Expect several weeks of work. The PEO will collect employee data, bank details, tax account information, benefit elections and workers’ compensation details. Employees usually sign new documents acknowledging the co-employment relationship and enroll in the PEO’s benefit plans, often during a dedicated open enrollment. Your payroll schedule, pay stubs and employee portal may change. Plan the timing carefully: many businesses prefer to start at the beginning of a calendar year or a benefits plan year to keep tax wage bases and deductibles simple. Tell employees early what is changing, what is staying the same and who to ask for help. A clear message prevents the common misunderstanding that employees have been transferred to a different company.
A PEO is often worth considering when you have a small or growing team, want better benefits than you can buy on your own, spend too much owner time on HR administration or are expanding into new states. It may be a weaker fit if you already have strong benefits, a capable HR team or very specific plan needs. Run the numbers using our PEO cost guide and the PEO cost calculator, and compare at least two or three proposals.
Whatever HR model you choose, the business is responsible for recording hours worked and following wage and hour law. A PEO’s payroll is only as accurate as the time data it receives. Keep clean records with clear approvals, and use a timekeeping policy that managers follow.
EZTime records clock-ins, breaks and overtime for hourly teams and produces approved timesheets you can export for payroll, whether you run payroll in-house, through a payroll service or through a PEO. Check with your PEO which export format it accepts.
Professional employer organization.
It becomes a co-employer. You keep control of hiring, firing and daily work; the PEO handles agreed HR, payroll and benefits functions.
A PEO certified by the IRS. A CPEO is generally solely liable for federal employment taxes on wages it pays to worksite employees.
No. An EOR is the legal employer, often used for employees in other countries, while a PEO shares employment with you.
Usually not. Most PEOs process the hours you report, so you still need accurate timekeeping.
Small and growing businesses that want better benefits and less HR administration.
As soon as you have hourly staff, two jobs take more time than most owners expect: recording hours accurately and building a schedule everyone can see. Under the federal Fair Labor Standards Act (FLSA), employers must keep accurate records of hours worked and pay non-exempt employees overtime for hours over 40 in a workweek, and some states add daily overtime or meal-break rules. This is general information, not legal advice.
EZTime covers all three with a time clock app, employee scheduling and payroll-ready exports, from $2 per employee per month. See pricing and start a 14-day trial.
Employees can fill in and sign forms like this in the EZTime app, and the signed copy lands in their digital employee file. For a team of 15, EZTime starts at about $30 a month ($2 per employee).