Professional Employer Organization (PEO)

What a PEO is

A professional employer organisation (PEO) enters a co-employment arrangement with a company that already has a legal entity. The PEO becomes the employer of record for payroll and tax reporting, runs benefits administration, workers' compensation and HR compliance, while the client keeps hiring, firing, day-to-day direction, pay decisions and the workplace itself. The people remain your team; the PEO supplies the employment back office.

The model is mature in the United States and is mostly a US concept. The industry body NAPEO counts 502 PEOs serving about 233,000 client businesses and 5.4 million worksite employees, reaching roughly 14 percent of businesses with 20 to 499 employees. Providers in other countries sometimes use the label, but the legal structure and what is included vary, so check what a non-US "PEO" actually does.

How co-employment divides responsibilities

The split is set out in the client service agreement. Typically:

• PEO: payroll processing and tax withholding under its own federal employer identification number, benefits procurement and administration, workers' compensation coverage, unemployment insurance accounts, and HR policy and compliance support.
• Client: who to hire and when to let someone go, what work is done and how, performance management, compensation decisions, workplace safety and the business itself.
• Shared: legal exposure. Co-employment allocates duties; it does not remove the client from wage, discrimination, safety or termination claims.

PEO versus employer of record

The two are often confused. A PEO co-employs people through your existing entity, usually in your home country. An employer of record becomes the sole legal employer in a country where you have no entity. If you want to employ someone abroad without incorporating, you need an EOR; a US PEO cannot do that. The full comparison is in EOR vs PEO.

The three models side by side are set out in our comparison of EOR, AOR and contractor of record arrangements. A payroll-focused intermediary is defined in our glossary entry on the agent of record. Some providers use the label global employment organization, which is explained in our glossary.

Certified PEOs

Under section 7705 of the US tax code, a PEO can apply to the IRS to become a certified professional employer organisation (CPEO). Certification requires financial, bonding and reporting standards. A CPEO takes on responsibility for federal employment taxes on wages it pays to worksite employees, which gives clients protection that a non-certified PEO does not. The start of a CPEO service contract is reported to the IRS on Form 8973. Ask any US PEO you evaluate whether it is certified and for evidence of its current bond.

When a PEO makes sense

• You have a domestic entity and a growing team but no HR department, and you want payroll, benefits and compliance handled by specialists.
• You are small enough that pooled benefit plans give you access to coverage and rates you could not negotiate alone.
• You employ people in several states and want one provider handling the differences in wage, leave, tax and reporting rules.
• You have moved past an employer-of-record phase in a country, opened an entity there, and now want administration outsourced rather than built in-house.

When it does not

• You have no legal entity where the worker is. A PEO cannot substitute for one.
• You are hiring outside the PEO's country. International hires need an EOR, a local entity or a staffing partner that employs people there.
• Your existing benefits, workers' compensation rates and HR capability are already strong, so the PEO fee duplicates what you have.
• You need bespoke benefits or unusual employment arrangements that standardised PEO plans cannot accommodate.
• Your industry is one that PEO insurance carriers avoid or surcharge; ask directly rather than assuming coverage.

How PEOs charge

Most PEOs price either as a flat amount per employee per month or as a percentage of total payroll, with health insurance, retirement plan costs and workers' compensation premiums passed through on top. Both structures are negotiable and fall with headcount. Quotes change often and vary by provider, state mix and industry, so this page does not list figures. Build a comparison of your current annual spend on HR staff, benefits premiums, payroll services, workers' compensation and compliance advice against the PEO's all-in quote, and use the Remote Hiring Cost Calculator to model the employee cost side.

Joint-employer liability and the NLRB

Whether a client is a joint employer for collective-bargaining purposes under the National Labor Relations Act has moved around. A 2023 rule that would have broadened the test was vacated by a federal court in March 2024 and never took effect; in February 2026 the Board formally reinstated the 2020 standard, under which joint-employer status requires substantial direct and immediate control over essential terms such as wages, benefits, hours, hiring, discharge, discipline, supervision and direction. Because a PEO client exercises exactly that kind of control over its worksite employees, co-employment still means shared exposure in practice. Wage-and-hour and discrimination claims run under their own statutes and are unaffected by the NLRB rule.

State unemployment insurance and PEO transitions

Joining a PEO can move your state unemployment tax reporting onto the PEO's account in some states, and leaving one can move it back. Federal law and state rules against "SUTA dumping" (manipulating unemployment-tax experience by shifting payroll between entities) mean these transitions need planning with your state agency rather than assumptions. Benefit plan transfers, retirement-plan blackout periods and partial-year tax forms from two employers are the other common friction points when changing PEOs, so most companies schedule a switch at a calendar or plan-year boundary.

Choosing a PEO: what to verify

• IRS CPEO status and current surety bond, and licences or registrations in every state where you have or expect employees.
• Financial stability: audited statements and references from clients of similar size and industry.
• Exactly which services are included, which are add-ons and which costs are passed through.
• Health, dental and vision plan options and provider networks, and whether the retirement plan is a multiple-employer plan.
• The termination clause: notice period, transition assistance, data portability and any exit fees.
• The technology: payroll, time tracking, employee self-service and reporting you will actually use.
• Response times and who your HR contact will be.

An older term for a similar arrangement is staff leasing.

Sources

• NAPEO: PEO industry overview.
• IRS: Certified professional employer organization program and Form 8973.
• NLRB: Withdrawal of 2023 standard for determining joint employer status (Federal Register, 27 February 2026).

References checked on 13 October 2026. Fees and service scope change frequently; obtain current quotes. This page is general information, not legal or tax advice for a specific engagement.