What’s a PEO?
A Professional Employer Organization (PEO) is essentially an outsourced HR department. You enter a co-employment arrangement where the PEO becomes the employer of record for tax and benefits purposes while you maintain day-to-day control of your employees. The PEO handles payroll, benefits administration, workers’ comp, compliance, and often provides HR advisory services.
PEOs pool employees from hundreds of small businesses together, which gives them buying power similar to a large corporation. That pooling is how they can offer health insurance, retirement plans, and other benefits at rates that a 15-person company couldn’t get on its own.
What DIY Benefits Administration Looks Like
Managing benefits in-house means you’re sourcing and administering each piece of the benefits puzzle separately. You work with a broker to find health insurance, set up a retirement plan through a provider like Guideline or Fidelity, handle compliance filings yourself (or with an attorney), run payroll through a platform like Gusto or ADP, and manage open enrollment internally.
It’s more work, but it gives you complete control over every vendor, plan design, and cost. You’re not locked into anyone else’s menu of options.
The Cost Question
PEOs typically charge either a per-employee-per-month fee ($150 to $250 is common) or a percentage of payroll (typically 3-8%). That fee covers administration, compliance, and access to their benefits plans. Health insurance premiums are separate and billed through the PEO at their group rates.
DIY costs are harder to pin down because they’re spread across multiple vendors. Payroll might cost $40-$80 per employee per month, benefits administration $5-$15, a broker’s commission is built into insurance premiums, and compliance work might mean occasional attorney fees. Add it all up and the administration costs alone might run $60-$120 per employee per month.
The real comparison isn’t admin fees though. It’s total cost including health insurance premiums. PEOs often get better health insurance rates for very small employers (under 20 employees) because of their pooled buying power. But as your company grows, your own group rates become more competitive and the PEO’s markup on administration starts to feel expensive.
When a PEO Makes Sense
PEOs shine in specific situations. If you’re a company with fewer than 20 employees and no dedicated HR person, a PEO bundles everything you need into one relationship. You don’t have to become an expert in benefits compliance, workers’ comp shopping, or employment law.
Startups that need to offer competitive benefits quickly to attract talent are another sweet spot. A PEO can have you up and running with health insurance, dental, vision, 401(k), and life insurance within a couple of weeks. Building that stack from scratch could take months.
Companies in states with complex employment regulations (California, New York, Massachusetts) also benefit from PEO compliance support. Staying on top of leave laws, wage requirements, and reporting obligations across states is genuinely hard for small teams.
When DIY Makes More Sense
As you grow past 50 employees, the math often shifts toward DIY. At that size, you can negotiate competitive insurance rates on your own, you probably have (or need) an HR person anyway, and the per-employee PEO fee starts adding up to real money.
DIY also makes sense if you want specific plan designs that a PEO doesn’t offer. Maybe you want an ICHRA instead of a traditional group plan, or a level-funded arrangement, or a specific carrier that your employees prefer. PEOs offer their menu and that’s what you get.
Control-oriented business owners sometimes chafe at the co-employment arrangement. With a PEO, your employees’ W-2s show the PEO’s name as employer. Some owners find that uncomfortable, and certain contracts, licenses, or government programs may treat PEO employees differently.
The Hybrid Approach
You don’t have to go all-in on either option. Some businesses use a PEO for payroll, compliance, and workers’ comp while sourcing health insurance and retirement plans independently. Others handle HR in-house but use an Administrative Services Organization (ASO) for compliance and payroll processing without the co-employment arrangement.
Benefits brokers and advisors can also fill many of the gaps that make PEOs attractive. A good broker handles insurance shopping, plan design, enrollment support, and basic compliance guidance. Pair that with a modern payroll platform and you’ve got most of what a PEO provides without the co-employment structure.
Questions to Ask Before Choosing
If you’re evaluating a PEO, ask these questions. What carriers do they use for health insurance in your state? What happens to your benefits if you leave the PEO? What’s the contract length and cancellation process? Can you see the actual claims data for your group? How do they handle workers’ comp for your specific industry?
If you’re going the DIY route, ask yourself. Do you have someone who can manage compliance and open enrollment? How much time does your team currently spend on benefits administration? Do you have a broker you trust to shop the market for you? Are you comfortable being responsible for ACA reporting, COBRA administration, and state-specific requirements?
Making the Transition
If you’re currently on a PEO and thinking about leaving, plan the transition well in advance. You’ll need to have insurance coverage lined up before your PEO coverage ends, transfer payroll to a new provider, and handle the compliance handoff. Most transitions take 60 to 90 days to do smoothly.
Going from DIY to a PEO is usually faster since the PEO handles the onboarding. But review the contract carefully, especially around minimum terms, fee structures, and what happens if you want to leave.
Bottom Line
PEOs are a legitimate and often smart choice for small employers who need enterprise-grade benefits without the overhead. DIY administration gives you more control and can be more cost-effective as you grow. Neither option is inherently better. The right choice depends on your company size, growth trajectory, HR capabilities, and how much control over benefits design matters to you.
If you’re not sure, talk to both a PEO and an independent benefits advisor. Compare the total cost, the plan options, and the level of support side by side. The numbers will usually point you in the right direction.
