Presented by The Medical Link
For UK companies expanding into the United States, hiring the first employee is often the moment the complexity of the US market becomes real. Unlike the UK, where many employment systems are standardized, the US operates through a patchwork of federal, state, and sometimes local regulations. Health insurance is also typically tied to employment. That alone changes the dynamic significantly. Entering the US is not simply a sales or growth strategy. It is an operational and compliance challenge that requires careful planning from the outset.
To successfully build a US workforce, UK employers must plan for three core areas from day one: health insurance and employee benefits, payroll and tax administration, and HR compliance.
The Three Pillars: Benefits, Payroll, and Compliance
- Health insurance is often the biggest surprise. In the US, employer- sponsored medical coverage is the primary way employees and their families access healthcare. Candidates will evaluate health plans carefully, and the quality of the offering can materially impact your ability to recruit and retain top talent. Dental, vision, disability, and retirement benefits are also common expectations, depending on industry and location.
- Payroll is not simply a matter of paying employees. In the US payroll requires correct withholding, reporting, and tax filings at multiple levels — federal, state, and sometimes local. Each state has its own rules regarding unemployment insurance, wage laws, and payroll tax requirements. For a UK company hiring across multiple states, this can become complicated very quickly.
- HR compliance is the third pillar and often the most underestimated. US employment regulations cover everything from employee classification and onboarding documentation to workers’ compensation, harassment training, state-mandated disability coverage, and leave requirements. The compliance burden increases as headcount grows and as employees are hired in additional states.
Two Common Solutions: EOR and PEO
For many UK companies, the fastest and most practical path into the US is to choose an employment model that outsources much of the early complexity. Two of the most common solutions are an Employer of Record (EOR) and a Professional Employer Organization (PEO).
- An Employer of Record (EOR) is often the simplest model for a company that wants to hire quickly without setting up a US entity. Under an EOR arrangement, the EOR becomes the legal employer of the worker in the US, while the UK company directs the employees’ day-to-day work. The EOR typically manages payroll, tax withholding, and many HR compliance requirements.
- EORs can be particularly attractive for companies hiring their first US employee, testing the market, or building a small footprint. They allow speed and simplicity, which is often essential in the earliest stage of market entry.
- A Professional Employer Organization (PEO) is generally the next step for companies that have formed a US entity and are ready to hire multiple employees. A PEO operates through a co-employment model, where the company retains control over business operations while the PEO supports payroll, HR administration, and compliance infrastructure. Importantly, PEOs often provide access to stronger benefits options than a small standalone employer may be able to secure on its own.
For companies scaling in the US, a PEO can reduce administrative burden, support multi-state hiring, and provide a structured HR platform that would otherwise take significant time and expertise to build internally.
Choosing the Right Model at the Right Time
While both EOR and PEO models can be highly effective, the best choice depends on your company’s stage, goals, and hiring plan.
EOR is typically best suited for:
- early-stage entry into the US
- one to a handful of employees
- no US entity in place
- maximum speed with minimal internal infrastructure
PEO is often best suited for:
- a US entity established
- a growing headcount
- hiring in multiple states
- a need for scalable benefits and HR administration
The key is recognizing that neither model is inherently “better.” The best approach is the one aligned with your expansion timeline and operational readiness.
Outgrowing the PEO: The “Traditional” Model
As a company becomes more established in the US, it may eventually outgrow even the PEO model. This can occur for several reasons: headcount growth, the desire for customized benefits design, internal HR capability expansion, or a preference to bring payroll and compliance functions in-house.
At that stage, many organizations transition into the traditional employer model, where they manage their own payroll vendor relationship, secure benefits directly through the commercial insurance marketplace, and build internal HR and compliance processes. This model offers flexibility and control, but it requires the right expertise and infrastructure to manage effectively.
The Importance of an Experienced Advisor
Across all phases — from first hire to full-scale US operations — the most successful UK companies share one thing in common: they work with an experienced advisor who understands the full landscape.
Benefits, payroll, and HR compliance are deeply interconnected in the US. Decisions made early can impact cost, employee experience, and compliance risk later. Having a broker and consultant who is versed across all areas helps companies evaluate EOR and PEO solutions, implement competitive benefits programs, and plan for the eventual transition to a traditional model as the organization grows.
For UK companies expanding into the US, the right partner can be the difference between a smooth market entry and a costly operational misstep.
