PEO vs Payroll vs EOR: Best HR Outsourcing for SMBs

Jan de Vries · 2026-05-22

If you run a U.S. company with 10 to 200 employees, you've probably felt the headache of payroll, benefits, and compliance. The right outsourcing model can save you time and money, but only if you pick the one that fits your setup. Here's the short version: use a PEO when you want everything bundled under co-employment, a payroll/HR suite when you want software without co-employment, an ASO when you need admin help on your own plan, and an EOR when you hire abroad without a local entity. This guide breaks down each model, names real providers, shares actual pricing, and gives you a framework you can use in an RFP. ### Four Outsourcing Models Defined in Plain Language Let's clear up the confusion. The key is who employs the worker, who files payroll taxes, and where the work happens. Mixing these up leads to bad purchases. **PEO (Professional Employer Organization):** This is a co-employment arrangement. The provider files payroll taxes under its own employer identification number (EIN), pools benefits, and often handles workers' comp, safety programs, and compliance. Over 230,000 U.S. businesses use a PEO, covering about 15 percent of employers with 10 to 499 employees and more than 4.5 million worksite employees. Look for IRS Certified PEO (CPEO) status and ESAC accreditation, which means audited financial and operating standards. **Payroll/HR Software (HCM):** Your company stays the sole employer. The vendor files taxes under your EIN and sells payroll, time tracking, benefits admin, and compliance tools as add-on modules. HCM stands for human capital management, which is the software layer for employee data and HR workflows. **ASO (Administrative Services Organization):** This is advisory and admin support without co-employment. Services are usually sold a la carte on your EIN, like payroll admin, handbook help, or compliance advice. It's a good middle ground if you want help but not a shared employer setup. **EOR (Employer of Record):** The provider becomes the legal employer in-country, so you can hire internationally without opening a local entity. A PEO requires a domestic entity and works through co-employment. An EOR removes that requirement entirely.  ### When Each Model Fits Your Business Start with your legal footprint. The right model depends on where you hire and how much employer control you want. Match the option to your current risk, not your future wish list. | Factor | PEO | Payroll/HR Suite | ASO | EOR | |--------|-----|------------------|-----|-----| | Employer of record | Co-employment | You | You | EOR provider | | Payroll tax filing | PEO's EIN | Your EIN | Your EIN | EOR's entity | | Benefits approach | Pooled master plan | Your own plans | Your own plans | Statutory + provider plans | | Typical fee basis | PEPM or % payroll | Base + per person | Per service | Flat PEPM | | Best when | U.S.-only, want one bundle | Have HR staff, want control | Need advisory only | Hiring abroad, no entity | A simple test: if everyone is U.S.-based and you want one bundled admin layer, compare PEOs. If you want software and full employer control, compare payroll suites. If you only need expert support, ask ASO firms for a service menu. If one hire is abroad and you have no entity there, start with an EOR.  ### Cost Models You Should Expect Always separate admin fees from pass-through costs. Two quotes that look similar might not be comparable. The lowest admin fee can still produce the highest total cost. **PEO pricing:** Flat per employee per month or a percentage of gross payroll, plus pass-through costs for benefits and workers' comp. Justworks publishes two tiers, and third-party summaries in 2026 cite $59 and $99 per employee per month for smaller teams. Oyster's U.S. PEO page lists an $89 PEO fee plus a $25 platform fee per employee per month, plus a one-time $500 implementation fee. ADP TotalSource and Paychex PEO remain quote-based. **Payroll/HR suites:** Transparent base plus per-person fees are more common here. Gusto's 2026 pricing lists its Simple plan at $49 per month plus $6 per person, with higher tiers for deeper HR features. **EOR pricing:** Published list prices run much higher because the provider becomes the legal employer abroad. Deel starts at $599 per employee per month. That's a big jump, but it covers the legal entity setup you'd otherwise have to build yourself. ### How to Choose Without Regret Before you sign anything, ask yourself these three questions: - Do I already have a U.S. entity? If yes, you can use a PEO, payroll suite, or ASO. If no, you need an EOR for international hires. - Do I want to keep full control of my employees? If yes, go with a payroll suite or ASO. If you're okay sharing employer status, a PEO works. - What's my budget per employee per month? PEOs run $59-$99 per employee per month plus pass-throughs. Payroll suites are $49 base plus $6 per person. EORs start at $599 per employee per month. > **A quick rule of thumb:** If you're U.S.-only and hate juggling multiple vendors, a PEO is your best bet. If you've got an internal HR person who wants control, pick a payroll suite. If you're just starting to hire abroad, an EOR saves you from opening foreign entities. ### Final Thoughts The right outsourcing model makes your life easier, not harder. Don't get sold on features you won't use. Focus on who employs your people, who files taxes, and where they work. That's the framework that never fails.