Payroll & HR Outsourcing for SMBs: Which Model Fits?

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 handling payroll, benefits, and compliance on your own. The good news is you don't have to. But the tricky part is figuring out which outsourcing model actually fits your situation. Let me break it down in plain English, so you can make a decision without all the jargon. ### Four Outsourcing Models Made Simple The key difference between these models comes down to three things: who employs your workers, who files payroll taxes, and where those workers are located. Get these mixed up, and you'll end up with a contract that doesn't match your needs. **PEO (Professional Employer Organization):** This is a co-employment setup. The PEO becomes a co-employer, files payroll taxes under its own EIN, and pools your employees into a large benefits plan. Over 230,000 U.S. businesses use a PEO, covering about 15% of companies with 10 to 499 employees. Look for IRS Certified PEO (CPEO) status and ESAC accreditation to ensure they're legit. **Payroll/HR Software (HCM):** With this option, you remain the sole employer. The software handles payroll, tax filing under your EIN, time tracking, and benefits administration as add-on modules. HCM stands for Human Capital Management, but think of it as a digital HR assistant. **ASO (Administrative Services Organization):** An ASO gives you advisory and admin support without co-employment. You hire them for specific tasks like payroll admin or compliance advice, all under your own EIN. It's like hiring a consultant who helps you manage things, not a partner who shares responsibility. **EOR (Employer of Record):** When you need to hire someone in another country but don't have a local entity, an EOR becomes the legal employer there. Unlike a PEO, which requires you to have a U.S. entity, an EOR handles everything abroad. ### When to Use Each Model Start by looking at your legal footprint. Where do your employees work? How much control do you want to keep? Here's a quick cheat sheet: - **PEO:** Best when all your employees are in the U.S. and you want one bundled service for payroll, benefits, and compliance. - **Payroll/HR Suite:** Ideal if you have an in-house HR team and want to keep full control over your plans. - **ASO:** Perfect when you only need expert advice on specific HR tasks, not a full outsourcing solution. - **EOR:** Your go-to when you hire someone abroad and don't have a legal entity in that country. Here's a simple test: If everyone's in the U.S. and you want a one-stop shop, compare PEOs. If you want software and control, look at payroll suites. If you just need help, call an ASO. If you're hiring internationally, start with an EOR. ### What You'll Pay: Real Pricing Don't just compare admin fees. Pass-through costs for benefits and workers' comp can blow up your total bill. Here's what you can expect: - **PEO pricing:** Flat per employee per month or a percentage of payroll. Justworks has two tiers: $59 and $99 per employee per month for smaller teams. Oyster's U.S. PEO charges $89 per employee per month plus a $25 platform fee, with a one-time $500 setup fee. ADP TotalSource and Paychex PEO usually require a quote. - **Payroll/HR suites:** More transparent here. Gusto's Simple plan costs $49 per month plus $6 per person, with higher tiers for more features. - **EOR pricing:** Expect higher costs because the provider becomes the legal employer. Deel starts at $599 per employee per month. Remember, the cheapest admin fee isn't always the best deal. Always ask for a full breakdown of pass-through costs before signing. ### How to Use This in an RFP When you send out a request for proposal, include these four questions: 1. Who files payroll taxes? (Under their EIN or yours?) 2. What benefits do you offer, and are they pooled or custom? 3. What's the fee structure? (PEPM, percentage, or flat fee?) 4. How do you handle international hires? This framework will help you compare apples to apples. And if you're still unsure, start with the model that matches your current risk profile, not the one you hope to grow into. Good luck.