PEO vs payroll software: which does your business need?

"Should we use a PEO?" usually comes up at the same moment, when a small company wants to offer competitive health insurance. Here's what a PEO actually changes, what it costs relative to software, and how to decide.

What a PEO is

A professional employer organization becomes the co-employer of your staff for certain purposes, typically payroll tax reporting and benefits. Because it pools many small companies' employees together, it can offer benefit plans usually reserved for large employers. You still direct the work and make hiring decisions.

What payroll software is

Payroll software calculates pay, withholds and files taxes, and handles year-end forms. You remain the only employer of record, and you choose benefits through a broker or the software's own benefits marketplace.

When a PEO makes sense

• You're competing for hires on benefits
• You have no HR person and want compliance support
• You have employees in several states

When software is enough

• Benefits aren't a deciding factor yet
• You want the lowest per-employee cost
• You want full control of vendors

Costs

Gusto lists Simple at $49 plus $6 per person per month (October 2026). PEOs usually charge a per-employee fee that's meaningfully higher, offset in part by benefits savings. Compare current prices on justworks.com/pricing and gusto.com/product/pricing.

See Justworks PEO →

See Gusto payroll →

See Rippling →

How we evaluated

Scores on this page are editorial scores out of 10. We built them from official product, pricing and documentation pages, checked in October 2026, using the weighted criteria below. Advertisers do not influence our ratings, and we haven't run lab-style benchmarks for this page.

This guide is general information, not tax or legal advice. Payroll tax rules vary by state. Check with a qualified accountant for your situation.

Related: Best payroll software · Gusto review · Rippling review · Justworks vs Rippling

How this page was made: from each provider's official product and pricing pages and its public documentation. We haven't run a formal hands-on test for this page. When we add hands-on notes, we'll label them.

Decision framework

1. Do you want access to pooled group benefits? Lean PEO.
2. Do you have an HR person or outside advisor? Lean software.
3. Do you plan to stay small for years? A PEO's bundled support may be valuable.
4. Do you want full control over plans and vendors? Lean software.

Compare Justworks (PEO) with Gusto or Rippling (software, with PEO option).

Benefits: how payroll tools handle them

Benefits are where providers differ most. Some, like Gusto, offer benefits administration and access to health insurance through a licensed broker arm in supported states, with deductions flowing directly into payroll. Rippling offers benefits administration as a module and a PEO option. Justworks operates as a PEO, which pools employees from many companies so smaller businesses can access group health plans.

When comparing, ask: Which states and carriers are available? Who is the broker of record? How are deductions synced? Can employees enrol themselves? What happens during open enrolment? And if you already have a broker, can you keep them?

Judging support before you need it

You find out how good payroll support is on the worst day: a missed deadline, a rejected bank debit or a tax notice. Before buying, check what channels are offered (chat, phone, email), the hours, whether higher plans get priority or dedicated support, and how tax notices are handled. During the trial or demo, ask a specific question such as how the provider handles a notice from your state unemployment agency, and note how clear the answer is.

Handling tax notices

Even with full-service payroll, agencies sometimes send notices, often because of a registration mismatch, a missing account number or an old provider's filing. Don't ignore them. Read what period and tax the notice concerns, check whether your provider filed for that period, and forward it through the provider's notice-handling process if they filed. Keep copies of every notice and response. Most issues are resolved by matching account numbers and filing records.

Questions to ask in a payroll demo

1. Which states and local taxes do you file for me, and are any excluded?
2. What is the full monthly price for my exact headcount and features?
3. Are contractors counted in the per-person fee?
4. How many payroll runs are included, and is off-cycle payroll extra?
5. What happens if you make a filing error?
6. How is support provided, and during what hours?
7. Is there a contract term or cancellation fee?
8. Can I export all payroll history if I leave?

Time tracking for hourly teams

For hourly employees, accurate time records are both a payroll input and a legal record. Look for mobile clock-in, optional location or job tagging, manager approval before payroll, and overtime rules that reflect your state. Daily overtime rules in some states differ from the federal weekly standard. Decide whether you'll use the payroll provider's built-in time tracking or a separate tool with an integration, and test that approved hours import correctly before your first live payroll.

Employee or contractor? Getting classification right

Misclassifying workers is one of the most expensive mistakes a small business can make, and payroll software can't decide it for you. In the US, the tests look at how much control you have over how the work is done, whether the worker uses their own tools and sets their own hours, whether they work for other clients, and whether the work is a core part of your business. Federal and state tests differ, and some states use stricter tests than the IRS.

Practical steps: document why each contractor is a contractor, use written agreements, collect a W-9 before paying them, and pay contractors through a system that can produce 1099 forms at year-end. If you're unsure about a specific role, ask an employment attorney or accountant before you start paying.

How to compare total cost fairly

Payroll pricing usually combines a monthly base fee with a per-person fee, and the per-person count may include contractors. Add-ons such as time tracking, benefits administration, HR support or extra states may be billed separately. PEOs typically charge per employee per month and may include benefits administration in that fee.

1. Count employees and contractors you'll pay each month.
2. List the features you need: multi-state payroll, time tracking, benefits, HR advice, onboarding.
3. Get each provider's price for exactly that configuration, in writing.
4. Ask about one-time setup or migration fees and contract terms.
5. Compare annual totals rather than headline monthly prices.

Employee onboarding, done well

Good onboarding saves hours and reduces mistakes. A typical self-service flow sends the new hire an invite, where they enter personal details, tax withholding, bank account for direct deposit, and e-sign documents such as an offer letter and handbook acknowledgement. Managers get tasks such as ordering equipment or scheduling training. If your platform includes IT features, as Rippling does, onboarding can also create accounts in work apps and ship a laptop. Test the flow by onboarding yourself or a colleague before your next real hire.

Year-end: what to expect

Around the end of the year your provider will ask you to review employee addresses and details, confirm any bonuses or final payroll adjustments, and approve year-end forms. W-2s and 1099s are then generated and, on full-service plans, filed with agencies and made available to workers. Before then, check that contractor tax IDs are on file, reconcile benefits deductions, and confirm any taxable fringe benefits have been recorded.

Compliance tasks that sit beside payroll

Payroll is one part of employer compliance. Depending on your state and size, you'll also deal with new-hire reporting, required workplace posters, paid sick leave rules, minimum wage changes, overtime calculations, workers' compensation insurance and I-9 employment eligibility verification. Many providers help with some of these, for example by filing new-hire reports or offering workers' comp through partners. Make a list of which tasks your provider handles and which remain yours, and put the remaining ones on a calendar.

Protecting payroll data

Payroll systems hold Social Security numbers, bank accounts and salaries, which makes them attractive targets. Turn on two-factor authentication for every admin, limit who can change bank details, require approval for payroll runs where supported, and be wary of emails asking to change an employee's direct deposit account; confirm such requests by phone. Review admin access when staff change roles or leave.

Payroll glossary

Full-service payroll

A provider calculates, pays and files payroll taxes for you.

PEO

Professional employer organisation: a company that becomes a co-employer for tax and benefits purposes.

EOR

Employer of record: a company that legally employs workers on your behalf, often in other countries.

Off-cycle payroll

A payroll run outside the regular schedule, for a bonus or correction.

W-2 / 1099

Year-end US forms for employees and contractors respectively.

SUI

State unemployment insurance, paid by employers in each state where they have employees.

What "full-service" tax filing actually covers

Full-service payroll providers generally calculate, withhold, pay and file payroll taxes on your behalf. That typically includes federal income tax withholding, Social Security and Medicare, federal unemployment tax, and state and local withholding and unemployment where supported. They also prepare year-end forms such as W-2s for employees and 1099s for contractors.

What they usually can't do is fix wrong inputs. If an employee's address is out of date, a state account number is missing, or a worker is misclassified, the filings will be wrong too. Check each provider's documentation for which states and local taxes it supports, and whether it offers a guarantee for filing errors it makes.

Payroll setup checklist

Whichever provider you choose, setup asks for the same core information. Gathering it before you sign up turns a stressful week into an afternoon.

1. Business details: legal name, EIN, business address, entity type and the date you started paying people.
2. State registrations: state withholding and unemployment insurance account numbers for each state where you have employees. Some providers can help register, but timelines vary by state.
3. Bank account: the account payroll will be debited from, plus verification.
4. Employee information: names, addresses, start dates, pay rates, and federal and state withholding forms. Most providers let employees enter this themselves during onboarding.
5. Payroll history: if you've already paid people this year, year-to-date wages and taxes so year-end forms are correct.
6. Benefits and deductions: health premiums, retirement contributions, garnishments and any other recurring deductions.
7. Pay schedule: weekly, biweekly, semimonthly or monthly, and your first pay date.

Run a preview payroll before your first live run, and compare it to your previous provider's output line by line.