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A PEO shares the employer role; an EOR replaces it. With a PEO you co-employ your staff, so compliance and liability stay partly with you. With an EOR, the provider becomes the sole legal employer and carries that responsibility in full.
A PEO needs your own legal entity; an EOR does not. A PEO only works where you already hold an entity, which in practice means a US state. An EOR uses its own local entities, so you can hire in a new country without setting one up.
For hiring outside the US, it is almost always EOR. A true co-employment PEO does not exist in most countries, so a service sold as a “global PEO” is usually an EOR under another name. If you are expanding internationally, EOR is the model that actually applies.
Ask ten vendors to explain PEO vs EOR and you may get ten slightly different answers. The two terms get used interchangeably in sales calls, pitch decks and blog posts, and that blurring costs real time when you are trying to decide how to hire, especially outside the US.
Here is the short version. A PEO shares the employer role with you. An EOR becomes the employer instead of you. Almost everything else that matters, the entity requirements, the geography, the liability and the cost, follows from that single difference.
This guide is for founders, COOs and HR leads weighing up EOR vs PEO as a way to structure hiring. We will cover what each model actually is, where each one fits, what they cost, and a simple framework for choosing between them.
A professional employer organisation (PEO) operates through co-employment. You and the PEO share the legal responsibilities of employing your staff. You keep control of day-to-day work, hiring decisions and management, while the PEO takes on much of the administrative and compliance burden that sits underneath.
Because a PEO co-employs your existing workforce, you need to already hold a legal entity in the US state where those employees sit. A PEO does not remove the entity requirement. It sits on top of it.
In practice, a PEO typically handles:
In the US, more established PEOs can apply to become a Certified Professional Employer Organization (CPEO) through the IRS. The CPEO programme, introduced under the Small Business Efficiency Act of 2014, sets financial and reporting standards a PEO has to meet before it can be certified. It is a useful credibility signal, and a reminder that the PEO model is built around US federal and state employment tax rules rather than being a global concept.
An employer of record (EOR) becomes the sole legal employer of your staff in a given country, on your behalf. You direct the work; the EOR holds the employment contract and takes responsibility for payroll, tax, compliance and statutory benefits in that country, using its own local entity. You do not need an entity of your own anywhere the EOR already operates.
For a fuller breakdown of how the model works, see our guide to what an employer of record is.
The two models look similar from a distance because both take payroll and compliance admin off your plate. The difference is who legally employs your people, and everything that flows from that.
| Factor | PEO | EOR |
|---|---|---|
| Legal employer | Shared: you and the PEO co-employ | Sole: the EOR is the full legal employer |
| Entity required? | Yes, in every state or country you use it | No, the EOR uses its own entities |
| Geographic scope | Practically US-only | Global, wherever the provider has entities |
| Liability | Shared between you and the PEO | Sits with the EOR as legal employer |
| Cost structure | % of payroll or per-employee fee, plus your own entity and compliance overhead | Flat fee per employee, typically all-inclusive |
| Talent sourcing included? | Not typically; a small number offer light recruiting support | No, an EOR is not a staffing or recruitment agency |
| Ideal for | US companies with an existing entity wanting to outsource HR and benefits admin | Companies hiring internationally without a local entity |
A staffing agency is often mentioned in the same breath as PEOs and EORs, but it answers a different question. A PEO or an EOR helps you employ people you have chosen. A staffing agency finds and supplies the people in the first place, usually for shorter-term needs.
The cleanest way to tell them apart is to ask what you actually need. If you already know who you want to hire and intend to keep them, you need a way to employ them: a PEO if you have a US entity, an EOR if you do not. If you have not identified the person yet, and the work is temporary, seasonal or hard to forecast, a staffing agency is the better fit, because sourcing the worker is the service you are paying for.
Two practical differences follow from that. First, a staffing agency’s workers are its own employees, usually placed across several clients for a defined period, whereas an EOR employs someone who works for you alone, for as long as you need them. Second, staffing is built for flexibility and exit, while PEO and EOR are built for continuity.
So a staffing agency tends to be the right call when:
One word of caution on the labels. Some agencies now offer EOR-style employment for contractors, and some EOR providers will happily employ a candidate you found through an agency. The name over the door does not always tell you the model, so it is worth checking what is actually being provided: sourcing, employment, or both.
If you need both, it helps to keep them close. ThisWorks provides employer of record services, and our sister brand, Works.jobs, handles staffing and recruitment, so sourcing a worker and employing them compliantly do not have to be split across unrelated providers.
No model is better in the abstract. The right one depends on where you already operate and how much of the employer role you want to hand off.
|
PEO
Shared employer, your US entity required
Pros
Cons
|
EOR
Sole employer, no entity of your own needed
Pros
Cons
|
Costs depend on headcount, country and the benefits involved, so there is no single figure that fits every company. What is worth understanding is how each model is priced, since the structures are genuinely different.
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PEO
Shared employer model
Typical fee
Percentage of total payroll, or a flat per-employee-per-month (PEPM) fee What's usually included
|
EOR
Sole employer model
Typical fee
Flat fee per employee, per month What's usually included
|
Staffing agency
Temporary staffing model
Typical fee
Markup on the worker's hourly or day rate What's usually included
|
The point that gets missed in a straight PEO-versus-EOR price comparison is the entity. A PEO fee can look lower line by line, but it assumes you are already paying to run a legal entity. An EOR fee removes that cost entirely. For a wider view of what outsourced payroll and admin involve, see our payroll outsourcing guide.
For a small business, the choice is usually simpler than it looks. A PEO only helps once you already have a US entity and a workforce to consolidate under it. If your growth is international from day one, an EOR is very likely the only relevant option of the two.
Cost sensitivity matters more at small headcounts, and here the honest answer is that it depends. A flat per-employee EOR fee is easier for a small team to forecast than a PEO’s payroll-percentage model, but the better comparison rests on your headcount and where you are hiring, not on a blanket claim that either is cheaper.
For a small business, the choice is usually simpler than it looks. A PEO only helps once you already have a US entity and a workforce to consolidate under it. If your growth is international from day one, an EOR is very likely the only relevant option of the two.
Cost sensitivity matters more at small headcounts, and here the honest answer is that it depends. A flat per-employee EOR fee is easier for a small team to forecast than a PEO’s payroll-percentage model, but the better comparison rests on your headcount and where you are hiring, not on a blanket claim that either is cheaper.
Our UK specialists can get your first employee onboarded in just a few working days — no UK entity required.
This is where the “global PEO” label falls apart. Co-employment as US law defines it does not translate abroad, so a service sold as a global PEO is, in almost every case, operating as an employer of record. Once you are hiring beyond a single US entity, EOR is not one option among several. It is the mechanism that makes compliant hiring possible without opening a company in each country.
That is exactly how our own coverage works. We employ people on your behalf across the countries we operate in, currently the UK, the Netherlands, Germany, Poland, Spain, South Africa, Portugal, and Canada. In each of those countries, you can hire a full-time employee without setting up a local entity, because we already hold one.
There may come a point where running your own entity in a given market makes sense, usually at higher headcounts or for long-term strategic reasons. When that time comes, entity setup is a separate decision, and one an EOR can help you grow into rather than forcing up front.
ThisWorks is not a PEO but an EOR, so we can compliantly employ your people in every market we cover, through our own local entities. We are an established provider with the local presence and compliance in place to get each hire right, transparent pricing with no hidden extras, and a team that stays close to every hire rather than disappearing once the paperwork is done.
“The words matter less than what you are trying to do. People say PEO because it is the term they have heard, but once we understand where they are hiring, the answer is nearly always an EOR. Our job is not to correct anyone, it is to make sure they end up with the setup that actually works for their team.”
— Gino Peters, CCO of ThisWorks
It depends on headcount and geography, so neither is cheaper by default. An EOR usually charges a flat fee per employee, which is easy to budget. A PEO fee can look lower on paper, but it sits on top of the cost of running your own legal entity, which an EOR removes.
The traditional co-employment PEO model is specific to the US, where it is built around federal and state employment tax rules. Services marketed as a “global PEO” almost always work as an employer of record in practice, because co-employment in the US sense does not exist in most other countries.
Hiring internationally doesn’t have to mean setting up a local entity, building payroll infrastructure or navigating complex employment legislation on your own. Whether you are hiring your first remote employee or expanding an international team, our specialists can support a smooth, compliant onboarding process in just a few days.
