Quick answer: A PEO (Professional Employer Organisation) is a company that co-employs your staff inside an entity you already own. It takes on payroll, employment-tax filing, benefits administration and HR compliance, while you keep control of hiring, day-to-day work and dismissal. It is a US model: outside the United States co-employment is rarely recognised, and providers selling a “global PEO” are in practice acting as an Employer of Record.
What does PEO mean?
PEO stands for Professional Employer Organisation (in the US, where the model comes from, it is spelled organization). A PEO is an outsourcing firm that becomes a co-employer of your workforce: it handles the administrative side of employment, meaning payroll, payroll taxes, benefits, workers’ compensation and HR compliance, while your company continues to run the business and manage the people.
The client company must already have a legal entity where the employees work. That single requirement is what separates a PEO from an Employer of Record, and it is why a PEO is a tool for running employment you already have, not for employing people in a new country.
How does a PEO work?
The relationship is set out in a client service agreement (CSA) that divides employer responsibilities between the two companies. The PEO runs payroll and files the employment tax returns, usually under its own tax identification number, and sponsors the benefit plans. You decide who to hire, what they do, what they are paid and when the relationship ends.
| Responsibility | Client company | PEO |
|---|---|---|
| Hiring, dismissal and day-to-day direction | Yes | No |
| Setting pay, roles and performance management | Yes | Advises |
| Running payroll and withholding tax | No | Yes |
| Filing federal and state employment taxes | No | Yes, usually under its own EIN |
| Health, retirement and other benefit plans | No | Yes, as plan sponsor |
| Workers’ compensation | No | Usually |
| HR policies, handbook and compliance guidance | Shared | Shared |
Because a PEO pools the employees of many client companies, it can buy health insurance and other benefits at large-group rates that a 20-person company could not get on its own. For many small US employers that is the main reason to use one.
What services does a PEO provide?
- Payroll and employment taxes: gross-to-net pay, federal, state and local withholding, and the related filings, including Forms W-2 and 941.
- Benefits: medical, dental and vision plans, 401(k) plans, life and disability cover, and FSAs or HSAs, usually at large-group rates.
- Workers’ compensation: cover under the PEO’s master policy, plus claims handling.
- HR compliance: handbooks, policy updates, and guidance on federal and state employment law as your headcount crosses new thresholds.
- HR administration and technology: onboarding paperwork, time off, employee records and a self-service portal.
What a PEO does not do is recruit for you (that is a staffing agency) or employ people in countries where you have no entity (that is an Employer of Record).
How much does a PEO cost?
PEOs charge an administrative fee in one of two ways. According to ADP, one of the largest US PEOs, fees run from about 2% to 12% of total payroll on a percentage model, or roughly $40 to $160 per employee per month on a flat per-employee model.
That fee is not the whole cost. Benefit premiums, workers’ compensation and state unemployment insurance are billed on top, so the useful comparison is the fully loaded cost per employee against what you would pay to run payroll, buy benefits and carry compliance yourself. For a small company the benefits saving often outweighs the fee; for a larger one with its own HR team it frequently does not.
What is a Certified PEO (CPEO)?
A Certified Professional Employer Organization is a PEO that the IRS has certified under a voluntary programme created by the Tax Increase Prevention Act of 2014. Certification matters because of who is liable for federal employment taxes. Under section 3511 of the Internal Revenue Code, a CPEO is treated as the employer of its worksite employees for those taxes on the wages it pays, and no other person is. With a non-certified PEO, your company generally remains liable if the PEO fails to pay over the taxes it has collected.
If you are choosing a US PEO, ask whether it is IRS-certified. The IRS publishes the list of certified organisations.
Hiring outside the US?
A PEO needs your own entity in the country. To employ someone where you have none, you need an Employer of Record, and that is what we do.
PEO pros and cons
| Pros | Cons |
|---|---|
| Large-group benefits at rates a small company could not get alone | You still need your own legal entity where the employees work |
| Payroll, tax filing and workers’ compensation handled for you | Built for the US: most PEOs cannot employ people in other countries |
| HR compliance support without hiring an HR team | Benefit plans and HR systems belong to the PEO, so switching provider means re-enrolling everyone |
| Predictable per-employee or percentage pricing | Fees sit on top of benefit premiums, so the saving shrinks as you grow |
| With a CPEO, liability for federal employment taxes sits with the provider | Co-employment can leave employees unsure who their employer is |
Does a PEO replace your HR team?
No. A PEO takes over the administrative and compliance work (payroll runs, benefits enrolment, tax filings, policy updates), but hiring decisions, performance, culture and employee relations stay with you. Companies without an HR function use a PEO to get expertise they could not justify in-house; companies with one use it to free their team from administration.
Do I need a PEO?
A PEO is usually worth considering if all three of these are true:
- You have your own legal entity in the US and your employees work there.
- You are small enough that large-group benefits would be a real saving, typically companies with fewer than a few hundred employees.
- You do not have, or do not want to build, an in-house HR and payroll function.
It is the wrong tool if you want to hire in a country where you have no entity. A PEO cannot employ someone there, because co-employment requires your own local employer. For that you need an Employer of Record, which becomes the sole legal employer on your behalf. And if you already have entities abroad and only need payroll run, that is global payroll, not a PEO.
What is a global PEO?
“Global PEO” and “international PEO” are marketing labels, not legal models. Because co-employment is not recognised in most countries outside the United States, a provider offering a global PEO has to become the sole legal employer of your workers, which is exactly what an Employer of Record does. When you compare providers under either label, judge the structure: who signs the employment contract, whether they employ through their own entity or a local partner, and who carries the liability if the arrangement is challenged.
Our guide to EOR vs PEO vs staffing agency sets the three models side by side, with costs.
Where TopSource fits
TopSource is not a PEO. We are an Employer of Record and global payroll provider: we employ people for you in countries where you have no entity, and run payroll in the ones where you do. If you are a US company looking for a domestic PEO to handle benefits and HR for your US team, a US PEO is the right call and we will tell you so. If you are hiring abroad, talk to our team.