What are the three types of PEO?
There are three types of PEO: the co-employment PEO (the most common model), the Employer of Record (EOR), and the Administrative Services Organization (ASO). Each model distributes employer responsibilities differently between the provider and the client company, making the right choice dependent on how much legal employer liability a business is willing to retain and how much administrative control it wants to hand over.
For companies expanding into new markets or managing a contingent workforce, understanding these distinctions is not a matter of preference — it is a compliance decision. The sections below address the most common questions HR directors and operations leaders ask when evaluating these models.
What’s the difference between a PEO, an EOR, and an ASO?
A PEO (Professional Employer Organization), an EOR (Employer of Record), and an ASO (Administrative Services Organization) are three distinct workforce management models. The core difference lies in who holds legal employer status. In a co-employment PEO, both the provider and the client share employer responsibilities. In an EOR arrangement, the provider becomes the sole legal employer. In an ASO, the client retains full legal employer status throughout.
This distinction has direct consequences for payroll liability, tax obligations, employment contracts, and regulatory compliance. A co-employment PEO typically requires the client to have an existing legal entity in the country where workers are employed. An EOR does not — making it the preferred model for companies entering a new market without a registered local entity. An ASO, by contrast, provides purely administrative support; the provider manages HR processes but carries none of the legal employer risk.
Choosing between these three models is not simply an HR decision. It shapes how a company structures its workforce obligations, manages risk, and plans its operational footprint in a given market.
How does a co-employment PEO actually work?
In a co-employment PEO arrangement, the PEO and the client company enter into a co-employment agreement in which the PEO becomes the employer of record for tax and administrative purposes, while the client retains day-to-day control over the workforce. The PEO handles payroll processing, benefits administration, tax filings, and HR compliance. The client directs the work.
This model works because both parties hold defined employer responsibilities simultaneously. The PEO pools employees from multiple client companies to access better benefits rates and streamline compliance obligations. The client benefits from reduced administrative burden without giving up operational authority over its people.
The critical requirement is that the client must already have a legal entity in the jurisdiction where workers are employed. Without that entity, a co-employment PEO cannot function as intended. This is the single most important structural limitation of the model and the primary reason companies entering a new country look to an EOR instead.
When should a company use an Employer of Record instead of a PEO?
A company should use an Employer of Record when it wants to hire workers in a country where it has no registered legal entity. The EOR becomes the sole legal employer on paper, handling employment contracts, payroll, tax compliance, social contributions, and statutory benefits — while the client company directs the actual work. This removes the need to establish a local subsidiary before hiring.
An EOR is particularly well suited to three scenarios: international market entry, project-based hiring in foreign jurisdictions, and rapid workforce scaling where setting up a legal entity would introduce unacceptable delays. For companies expanding into the Netherlands or broader European markets, an EOR provides a compliant, low-friction path to employing local talent without the cost or timeline of entity incorporation.
Blue Lynx operates as an Employer of Record for clients entering the Dutch and European markets, managing payroll, compliant contracts, taxes, social premiums, and HR support on the client’s behalf. This is particularly relevant for non-European businesses that need boots on the ground quickly while maintaining full operational control over their teams.
One important consideration: EOR arrangements are generally designed for workforce agility rather than permanent structural presence. If a company intends to build a large, long-term workforce in a given market, establishing a local entity and transitioning to a co-employment PEO or direct employment model may ultimately be more cost-effective.
What does an ASO provide that a PEO does not?
An ASO provides HR administration services without any transfer of legal employer status. Unlike a PEO, an ASO does not co-employ workers and does not appear on employment documentation. The client company remains the sole legal employer and retains full liability for payroll taxes, employment law compliance, and benefits obligations. The ASO simply executes administrative functions on the client’s behalf.
This distinction matters for companies that want operational support without relinquishing any employer control or visibility. An ASO is typically chosen by larger organizations with established HR infrastructure that need to reduce administrative overhead without restructuring their legal employer relationships. It is not a risk-transfer mechanism — it is a process-efficiency tool.
Where a PEO pools client employees to offer access to better benefits packages and shared compliance frameworks, an ASO provides no such pooling benefit. The client negotiates its own benefits, carries its own compliance risk, and simply outsources the execution of HR tasks. For companies with complex, bespoke employment arrangements or strong internal HR teams, this level of control can be exactly what is needed.
Which type of PEO is right for your business size and structure?
The right model depends on three factors: whether you have a legal entity in the target market, the size and permanence of the workforce you need to manage, and how much employer liability you are prepared to retain. Smaller companies entering new markets without a local entity should default to an EOR. Mid-sized companies with an existing entity that want to reduce HR administration should consider a co-employment PEO. Large enterprises with mature HR functions that need administrative support without liability transfer are best served by an ASO.
For companies operating in or expanding into the Netherlands, there is an additional compliance layer to consider. Dutch employment law is specific about worker classification, contract types, payroll tax obligations, and the rights of temporary workers. Choosing the wrong model — or working with a provider that is not certified to operate in the Dutch market — creates meaningful legal and financial exposure.
The clearest takeaway is this: start with the question of legal entity, not service preference. If you cannot answer “do we have a registered entity in this country?” with certainty, an EOR is almost always the right starting point. Once your operational footprint is established and your workforce needs are stable, you can reassess whether a co-employment PEO or ASO structure better fits your long-term model.