Most companies start getting real value from a PEO somewhere between 10 and 50 employees. The trigger is rarely headcount alone. It’s the week you realize HR paperwork, benefits, or a new state’s payroll rules are eating the time you should spend running the business.
What a PEO actually does
A PEO (professional employer organization) becomes the co-employer of your team. You still run the business and manage your people day to day. The PEO handles payroll, taxes, benefits, workers’ comp, and a lot of the compliance paperwork.
The big advantage is scale. A PEO pools thousands of small companies together, so a 15-person business can offer health insurance and a 401(k) that look like what a much larger company offers. That’s exactly who uses them: according to the industry association NAPEO, almost two-thirds of PEO clients have between 10 and 49 employees.
Five signs it’s time
- HR admin is taking hours every week. If you or a manager are running payroll, chasing benefits enrollment, and answering compliance questions, that’s expensive time.
- You’re losing candidates over benefits. Small group health plans are often pricey and thin. A PEO’s pooled plans can close that gap.
- You’re hiring in another state. Each new state means new tax registrations, new withholding rules, and new labor laws. PEOs already have this set up everywhere they operate.
- A state retirement mandate now applies to you. As of April 2026, 22 states have enacted state retirement programs that require employers without a plan to enroll employees in a state IRA. A 401(k) through a PEO typically satisfies the requirement. New York’s rules, for example, count a PEO-sponsored plan as the employer offering one.
- You’re approaching 20 or 50 employees. Federal COBRA continuation coverage generally applies at 20 employees. The ACA employer mandate and FMLA apply at 50. Both bring new compliance work.
When a PEO probably isn’t the right fit yet
- You have fewer than 5 employees and simple payroll. Standalone payroll software is usually cheaper and enough.
- You already have a strong benefits package and an HR person. You may get more from an HR software platform plus a benefits broker.
- You want full control over plan design. In a PEO you choose from their plans, not your own. Larger companies often outgrow that.
What a PEO costs
Pricing usually runs one of two ways: a flat fee per employee per month, or a percentage of payroll. Typical costs land between $500 and $1,500 per employee per year, or 2% to 12% of wages, depending on what’s included.
The fair comparison isn’t the PEO fee against zero. It’s the PEO fee against what you pay now for payroll software, a benefits broker, workers’ comp, and the hours you spend on HR admin.
PEO vs. payroll software vs. HR software
| Option | What you get | Best for |
|---|---|---|
| Payroll software | Paychecks, tax filings, basic reporting | 1 to 10 employees with simple needs |
| HR software (HRIS) | Payroll plus onboarding, time off, records. You buy benefits separately | Companies with an HR person who wants control |
| PEO | Payroll, benefits, workers’ comp, compliance, all bundled through co-employment | 10 to 50 employees who want big-company benefits without an HR department |
Not sure which fits?
Take our 2-minute quiz to see whether a PEO makes sense for your company yet. Or get matched: tell us about your business and we’ll personally suggest the one or two providers that fit.