The Split Is Liability, Not Features
Choose payroll software if your only problem is running payroll correctly. Gusto lists its entry plan at $49 per month plus $6 per person, and a contractor-only plan at $35 per month plus $6 per contractor.
Choose a PEO when benefits and compliance risk cost you more than the fee. A PEO becomes your co-employer, files taxes under its own identification number, and puts your staff on its group health and workers compensation policies for a per-employee monthly fee.
Both models run payroll accurately. They differ in who carries the risk when something goes wrong.
That distinction gets lost in sales demos, because the screens look similar. Payroll runs, direct deposits, and tax filings appear in both products.
The contract underneath is what changes. One is a software subscription, and the other is a shared employment relationship with real legal weight.
What a PEO Takes Off Your Desk
- ● Software files, a PEO shares the liability
- ● Group health rates drive the whole math
- ● Exits are the expensive part of a PEO
A PEO enters a co-employment arrangement with your company. Your business keeps hiring, firing, pay decisions, and day-to-day direction of the work.
The PEO reports wages under its own federal employer identification number and remits payroll taxes on that basis. That single mechanic drives most of the other differences.
Because it employs thousands of people on paper, the PEO buys health insurance and workers compensation as a large group. A ten-person company gets access to rates that a ten-person company cannot normally negotiate.
Compliance support usually comes bundled. State registrations, unemployment accounts, workplace posters, and handbook templates are handled by the provider rather than by whoever in your office drew the short straw.
What Payroll Software Leaves in Your Hands
Payroll software calculates gross to net, files federal and state returns, and moves the money. Your company remains the sole employer of record throughout.
That means the tax identification number on every filing is yours. Notices from a state agency land on your desk, and penalties follow the same path.
Benefits stay a separate purchase. Most platforms integrate with a broker or an in-house benefits arm, but you sign the group health contract and you absorb the annual renewal increase.
Workers compensation also stays yours. Small employers usually buy a policy with an estimated payroll figure, then settle the difference at audit, which is where surprise bills come from.
The Co-Employment Part People Skim
Co-employment sounds alarming and is mostly administrative. The written service agreement allocates responsibilities between your company and the PEO.
Read which party is responsible for wage and hour compliance, employment practices claims, and terminations. Providers differ, and the answer decides how much protection you actually bought.
Certification matters here. The IRS operates a voluntary certification program for professional employer organizations, and a certified PEO carries defined federal employment tax responsibility for wages it pays.
Ask for that status in writing rather than trusting a logo on a sales page. It affects who the IRS pursues if payroll taxes go unpaid.
What Each Model Costs Before Benefits
| Cost element | Payroll software | PEO |
|---|---|---|
| Published entry price | Gusto Simple at $49 per month plus $6 per person | Administrative fee quoted per employee per month |
| Contractor handling | Gusto contractor-only plan at $35 per month plus $6 per contractor | Justworks lists contractors at $8 per month each |
| Benefits administration | Broker fee or platform add-on, billed separately | Often bundled, Justworks lists benefits enrollment at $25 per enrolled employee monthly |
| Health insurance | You negotiate and sign your own group plan | Bought through the PEO master policy |
| Workers compensation | Your own policy, settled at annual audit | Usually inside the PEO program |
| Federal unemployment tax | You pay 6.0 percent on the first $7,000 of wages, less up to a 5.4 percent credit | Same statutory tax, remitted by the PEO |
| Who receives agency notices | Your company | The PEO, under its own identification number |
Published prices move, and PEO quotes depend on headcount, state, and benefit mix. Confirm current pricing on the official site before you build a budget around any figure here.
Where the Real Money Hides in Both Bills
The advertised platform fee is the smallest line in either model. Health insurance is the number that decides the comparison.
If your broker quote for a small group already looks reasonable, the PEO fee is pure overhead on top of payroll you could run for a few hundred dollars a month. If your quote is punishing, PEO group rates can swallow the fee whole.
Payroll taxes are identical either way, since the statute does not care who files. Federal unemployment tax runs 6.0 percent on the first $7,000 of each employee wages. Employers who pay state unemployment on time generally claim a 5.4 percent credit, which brings the net rate to 0.6 percent.
That credit shrinks in credit reduction states, where the state has an outstanding federal loan. A PEO does not exempt you from that arithmetic, it just handles the filing.
Watch the per-head add-ons too. Benefits enrollment fees, contractor payments, and unpaid owners each carry their own monthly charge in most PEO fee schedules.
A Twelve Person Company, Run Both Ways
Take a twelve-employee company in one state, offering health insurance for the first time. On the software path, a Gusto Simple subscription costs $49 plus twelve seats at $6, so $121 per month before anything else.
Add a broker-placed group health plan and a standalone workers compensation policy on top. The platform line stays small, and the insurance lines carry the weight.
On the PEO path, the administrative fee is quoted per employee per month, so the same twelve people generate a bill many times that subscription. Providers publish some add-ons plainly, and Justworks lists benefits enrollment at $25 per enrolled employee per month.
The decision therefore rarely turns on the platform fee. It turns on whether the PEO group health premium per employee beats your broker quote by more than the administrative fee costs.
The State Unemployment Rate You Inherit
New employers receive a state unemployment rate set by the state, then earn an experience rating over time. Layoffs push that rate up, and stable payrolls pull it down.
Inside a PEO, the treatment varies by state. Some states keep the client rate, and others apply the rate attached to the PEO account, which can help or hurt depending on the provider claims history.
This matters most on the way out. Leaving a PEO can mean starting fresh at a new employer rate, even if your own record was clean before you joined.
Ask any provider which state rate applies to your account, and ask what happens to it at termination. Both answers belong in the contract rather than in an email from a sales representative.
Which Setup Fits Your Company Right Now
- ● Count the states you run payroll in
- ● Price group health on your own first
- ● Ask for the exit terms in writing
One to five employees in a single state: Payroll software wins on price and simplicity. At this size the compliance surface is small enough to manage with a calendar reminder.
A team offering health insurance for the first time: Price both paths in the same week. Get a broker quote and a PEO quote, then compare total monthly cost per employee rather than the platform fee.
Remote staff spread across several states: A PEO earns its fee here. Each new state means registrations, unemployment accounts, and local tax rules that your provider already maintains.
Contractor-heavy studios and agencies: Stay on software. Contractor pricing is cheap on both sides, and a PEO fee structure built around W-2 employees fits poorly.
Companies in an industry with high workers compensation rates: Model the PEO carefully. Group programs sometimes beat standalone policies, and sometimes carve out your exact class code.
Businesses heading into a funding round or acquisition: Ask counsel first. Co-employment shows up in diligence, and unwinding it mid-transaction is unpleasant.
The Switching Cost Nobody Prices In
Leaving a PEO is harder than joining one. You keep your people, but the benefit policies belong to the provider.
An exit means sourcing your own health plan, buying workers compensation, opening state unemployment accounts, and running open enrollment on a deadline. Timing the move for January avoids restarting wage bases mid-year.
Software migrations are milder but not free. Year-to-date wages, tax deposits, and benefit deductions all have to land correctly, which is why most teams switch at a quarter boundary.
Either way, ask for the termination terms before signing, not during the exit conversation. Our guide to auditing SaaS subscriptions and cutting wasted seats covers the habit of reading contract terms early.
Questions to Ask Before You Sign
Ask any PEO for its certification status, its renewal history on group health, and the exact administrative fee per employee per month. Vague per-employee ranges hide a lot.
Ask whether the fee is a flat amount or a percentage of payroll. Percentage pricing quietly raises your bill every time you give a raise.
Ask a software vendor which filings are included, which states cost extra, and who pays the penalty when a filing is late. Answers vary more than the marketing suggests.
Finally, ask both for a written list of what happens at year-end. W-2 delivery, final filings, and record access after termination are the details that hurt later. For the underlying pricing models, see our comparison of per user versus flat rate SaaS pricing.
Where This Lands
Most small employers with staff in one state should run payroll software and buy benefits through a broker. The math is simple, the exit is cheap, and nothing about the arrangement complicates a future sale.
The PEO case gets strong when your problems stop being payroll problems. Multi-state hiring, meaningful benefits, and compliance exposure are what the fee actually buys.
Price the two on total cost per employee per month, including insurance, rather than on subscription lines. That is the only comparison that reflects the decision you are making.
Whichever way you go, keep your own copies of filings and wage records. For a starting point on tooling, see our roundup of payroll software for small business and our overview of HR software for small business.
If you have only one employee so far, a PEO may be more than you need. We worked through the tax math and deadlines of running payroll yourself versus using software for a first hire.
FAQ
What is the difference between a PEO and payroll software?
Payroll software calculates and files, while your company stays the sole employer of record for tax and insurance purposes. A PEO becomes a co-employer, files under its own federal employer identification number, and puts your staff on its benefit and workers compensation policies.
Is a PEO cheaper than payroll software?
Rarely on the invoice. Payroll platforms such as Gusto start around a $49 monthly base plus $6 per person, while PEO administrative fees run per employee per month and land far higher. The comparison only tilts when the PEO group health rate beats what you can buy alone.
Do I lose control of my employees with a PEO?
No. You still hire, manage, set pay, and fire. The co-employment contract splits administrative and tax responsibilities, not day-to-day direction of the work.
When does a small business outgrow payroll software?
Usually at the point where benefits, multi-state hiring, or workers compensation audits start eating a manager week each month. Headcount matters less than the number of states and the complexity of the benefits you want to offer.
Can I leave a PEO later and keep my benefits?
You keep the people, not the policies. Leaving means sourcing your own health plan and workers compensation coverage, obtaining new state unemployment accounts, and restarting wage bases mid-year unless you time the exit to January.
Does a PEO handle payroll taxes and filings?
Yes, that is the core of the arrangement. The PEO reports wages under its own identification number and remits federal and state payroll taxes, which is why the contract matters more than the software screens.
Sources
- Certified professional employer organization | Internal Revenue Service — checked 2026-10-01
- Employment taxes | Internal Revenue Service — checked 2026-10-01
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How this article was made: it was drafted with AI assistance from the official sources listed above, and its figures were checked against those pages on the dates shown. It is not based on personal hands-on testing.
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