St. Louis is a major Midwestern economic center with a strong healthcare system, growing biotech sector, and significant financial services industry.
We compare 28 PEOs serving St. Louis (a 301K+ city), including Justworks, Rippling, ADP TotalSource, Insperity and TriNet, at no cost to you.
Key industries in St. Louis
St. Louis is a major Midwestern economic center with a strong healthcare system, growing biotech sector, and significant financial services industry.
Compliance note: St. Louis businesses often have employees across Missouri and Illinois, creating dual-state compliance complexity.
Key industries in St. Louis
Tell us your headcount, location, and current payroll setup. That's enough to get started on your St. Louis PEO comparison.
A consultant reaches out to learn more about your goals: benefits priorities, budget, implementation timeline.
We build a side-by-side comparison of the 3-5 PEOs best suited for your St. Louis business, with pricing and our recommendation.
Once you choose, we negotiate the contract and stay involved through implementation.
PEOs we compare for St. Louis businesses
Free, no-obligation comparison. We follow up same day.
For Missouri multi-state employers (especially KC metro), ADP's payroll bench is genuinely best-in-class. Worth the price for complexity.
Strong fit for Missouri SMBs already on Paychex payroll. Multi-state tax compliance is solid.
Houston-based but national reach. Strong service teams for Missouri mid-market professional services and healthcare.
The high-touch pick for Missouri mid-market employers (50+ employees) that want a dedicated HR business partner.
We place clients across Missouri, including Kansas City, St. Louis, Springfield, Columbia. The right PEO often varies by metro because of regional service-team coverage.
Yes. Any of the top-tier PEOs (ADP TotalSource, Insperity, Paychex PEO) handle the MO/KS border situation cleanly — single employer registration, dual-state tax remittance, and unified employee records. This is one of the strongest cases for using a PEO in the KC metro.
Yes for employers with 5+ employees (1+ in construction). A PEO's group workers comp arrangement covers your Missouri employees under the PEO's master policy, often at rates a single-employer subscriber couldn't access.
Expect $130–$220 per employee per month for a 25–75 employee Missouri SMB, depending on benefits selection and industry. Premium-tier PEOs (Insperity) run higher; mid-tier (Paychex, CoAdvantage) come in toward the lower end.
Missouri does not separately license PEOs at the state level — federal CPEO status is the primary credential to verify. Always verify CPEO status on the IRS public list before signing.
Also serving businesses in Missouri
Looking for PEO options across all of Missouri? View our Missouri PEO broker page →