What is a PEO? (Professional Employer Organization)
A PEO (Professional Employer Organization) is a co-employment arrangement in the United States where a PEO shares legal responsibility for a client's employees. The PEO handles payroll, benefits, workers compensation, and HR compliance; the client directs day-to-day work.
In more detail
Under a PEO, the employees are technically co-employed by both the PEO and the client. The PEO becomes the employer of record for tax purposes (using its own Federal Employer Identification Number) while the client remains the worksite employer. This lets small US businesses access Fortune 500-style health insurance, 401(k) plans, and HR expertise without building their own HR department.
PEOs are regulated by the IRS, which certifies qualified PEOs under IRC section 7705. PEOs are a US-specific concept; they do not work for employees outside the US. For international hires, companies use an EOR or managed staffing instead.
What a PEO handles
- Payroll processing and federal/state tax filings.
- Group health, dental, vision, 401(k), and supplemental benefits.
- Workers compensation and unemployment insurance.
- HR compliance, employee handbook, and training.
- Hiring, onboarding, and offboarding support.
Related terms
Common follow-up questions
No. A PEO is a US co-employment model for US employees where both PEO and client are legal employers. An EOR is the sole legal employer, typically used for international workers.
Mostly US small-to-midsize businesses with 5 to 500 employees who want enterprise-grade benefits and HR without hiring a full HR team.
It can for small companies. Larger companies typically keep an internal HR leader for strategy while the PEO handles transactional HR.