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If your finance lead has been searching for help with payroll, two terms keep coming up: a payroll bureau (also called a payroll service bureau in the US) and an employer of record (EOR). The two get pitched as alternatives but they sit at different layers of the stack. A payroll bureau processes payroll for your own entity. An EOR is the legal employer in a country where you have no entity. Picking the wrong one can leave you compliant but overspending, or non-compliant and exposed.
This article walks through what each one actually does, how they price, when each is the right call, and how to combine them across a multi-country footprint.
What a Payroll Bureau Actually Does
A payroll bureau is a third party that runs payroll on your behalf for the entity you already operate. In the UK, that means a bureau processes your monthly or weekly payroll, calculates PAYE income tax and National Insurance contributions, files Real Time Information returns to HMRC, manages auto-enrolment pension contributions, issues payslips and P60s, handles statutory sick pay and statutory maternity pay, and reconciles year-end. In the US, a payroll service bureau does the equivalent across federal and state payroll taxes, files quarterly 941s and annual W-2s, manages garnishments, and handles unemployment-insurance reporting.
The bureau is a service provider. Your company is still the employer. You hold the employer numbers (HMRC PAYE reference, EIN, state IDs). You sign the employment contracts. You carry employer liability for misclassification, wrongful dismissal, holiday pay, statutory leave, and so on. The bureau just runs the calculations and the filings on your numbers.
Pricing is usually per-payslip (commonly £4 to £15 in the UK, $5 to $25 in the US) or a flat monthly fee for smaller employers. There may be a setup fee, a year-end fee for P60s or W-2s, and additional charges for off-cycle runs.
What an EOR Actually Does
An EOR is the legal employer of your worker in a country where you have no entity. The EOR or its in-country partner signs the local employment contract, registers the worker with the local tax and social-security authorities, runs payroll under the EOR’s own employer numbers, makes statutory contributions, manages benefits, and handles termination under local labor law. You direct the work and pay the EOR a flat fee per employee per month, plus the gross salary and the country’s mandatory employer contributions. An EOR is the fastest legally compliant way to put someone on payroll in a country where you do not yet have an entity.
The single difference that matters: the EOR carries the employer relationship. You carry the work direction. With a payroll bureau, you carry both.
Side-by-Side Comparison
The table below brings the operational and legal differences into one view. Use it as the starting point for your model-fit conversation, not the final answer for any specific country or scale.
| Dimension | Payroll Bureau | Employer of Record |
|---|---|---|
| Legal employer | Your own entity | EOR or its local entity |
| Local entity required | Yes, in every country covered | No |
| Scope | Payroll calculation, statutory filings, payslips, year-end | Employment contract, payroll, benefits, statutory leave, termination |
| Time to first paycheck | Days, if entity is already running | Days to two weeks |
| Pricing | Per-payslip (£4 to £15 UK, $5 to $25 US) or small monthly fee | Flat $400 to $700 per employee per month, plus gross and statutory |
| Statutory liability for the worker | Carried by your entity | Carried by the EOR |
| Termination process | You manage notice and severance under local law | EOR runs the process and you fund it |
| Best for | Running payroll inside countries where you already operate | Hiring in countries where you have no entity |
The Legal-Employer Test
This is the cleanest way to know which model you need. Ask yourself: in the country where you want to pay this person, does your company own a registered legal entity that can lawfully employ staff?
If yes, a payroll bureau can run your payroll for you. You remain the employer. The bureau handles the operational mechanics.
If no, your company cannot lawfully employ that person under its own name. A payroll bureau cannot fix that, because the bureau does not employ anyone either. Engaging a worker as a contractor when the work looks like employment, or paying them off a foreign payroll, usually creates one or more of: misclassification exposure, permanent establishment risk, unpaid social contributions, and personal income tax disputes for the worker. An EOR is the registered-and-licensed way to compliantly employ someone without standing up your own entity.
Cost: How the Two Compare
For a UK SME running payroll for a 25-person team in the UK, a payroll bureau is typically the lowest-cost answer. At £8 per payslip, monthly bureau cost is roughly £200 plus VAT. The underlying entity costs you a registered office, a Companies House annual confirmation statement, an accountant for statutory accounts, and director liability insurance, but those costs exist whether or not the team is on a bureau and they are amortized across all employees.
An EOR for the same team would price at roughly £400 to £550 per employee per month (depending on country and provider), so 25 employees would land closer to £10,000 to £14,000 per month in EOR fees alone (gross salary and employer NICs sit on top in both models). The EOR is dramatically more expensive at scale in your home country.
The math flips when you cross a border. If you want to hire one engineer in Spain and you have no Spanish entity, the EOR fee plus statutory contributions on a £4,000 monthly salary is significantly cheaper than incorporating in Spain (a few months and several thousand pounds of legal fees, plus a Spanish accountant, plus a local payroll bureau) for one person. The EOR wins on the first hire. Once headcount in that country grows past around fifteen to twenty employees, incorporation plus a local payroll bureau usually becomes the cheaper running model.
When a Payroll Bureau is the Right Fit
A payroll bureau fits when you already have the legal entity and want to outsource the payroll administration. Common patterns: a UK SME with an in-house finance team that does not want to also be the payroll function. A growing company that has outgrown a basic accounting package and wants real-time RTI compliance, auto-enrolment, and clean year-end. A US small business that wants someone else to handle quarterly 941 filings and annual W-2 distribution.
Bureaus also fit larger employers in their primary country, particularly when the in-house payroll team would otherwise spend significant time on rule changes, year-end, and edge cases (statutory pay, salary sacrifice, share schemes, off-payroll workers). Outsourcing the runtime to specialists lets your team focus on payroll strategy and exception handling rather than rule mechanics.
When an EOR is the Right Fit
An EOR fits when you want to hire in a country where you have no legal entity. Common signals: you found a senior candidate in Portugal and your nearest entity is a UK Ltd. You are testing demand in Germany and want to put one country lead on the ground without committing to a GmbH. You hired a remote engineer in Mexico and want them on a real employment contract with statutory benefits, not on a contractor invoice. You are winding down operations in a small market and want to offload the termination administration.
For most SMEs making their first international hires, an EOR in the foreign country plus a payroll bureau in the home country is the simplest, lowest-risk operating model. The EOR carries the foreign employment relationship; the bureau runs your domestic payroll.
The Hybrid Model: Bureau at Home, EOR Abroad
This is the most common pattern for growth-stage companies. They run their domestic payroll through a payroll bureau (UK Ltd through a UK bureau, or Inc. through a US payroll service). They use an EOR for any country where they have no entity. As headcount in any single foreign country grows past the threshold (commonly fifteen to twenty-five employees), they incorporate in that country, hire a local accountant, onboard a local payroll bureau, and migrate the EOR-employed workers onto their new entity.
This is not a mistake of complexity. It is the lowest-total-cost operating model for a multi-country footprint with uneven country headcount. Trying to force one bureau across many countries (where you may not have entities) does not work, and trying to force an EOR across countries where you do have entities is needlessly expensive.
Switching from EOR to Your Own Entity Plus a Local Bureau
The transition takes around three months end to end and follows a pattern that is broadly consistent across countries. Incorporate the local entity (one to three months depending on jurisdiction). Register for the country’s PAYE-equivalent and social-security employer numbers. Onboard a local payroll bureau on the new entity. Issue new local employment contracts to the workers currently with the EOR, preserving tenure, salary, and benefits as required by local labor law. Agree a termination date with the EOR (often the last day before the new payroll cycle). Settle accrued holiday, severance reserve, and any pension or savings balances per local rules.
Watch for country-specific complications. France treats some transfers as a transfer of undertaking with statutory tenure and benefits preservation. Germany requires works council consultation past a headcount threshold. Italy applies similar TUPE-like rules. The Netherlands has clear rules on continuation of service. Build the local legal review into the project timeline, especially in those markets.
Decision Framework
Run through these questions in order:
- Do you already have a legal entity in the country? If yes, a local payroll bureau is usually the right solution. If no, you likely need an EOR unless you are prepared to start an incorporation project, which can take several months.
- How many employees do you expect to have in the country? Smaller or uncertain teams are often more cost-effective under an EOR model. Larger and stable teams may justify running payroll through your own entity with local payroll support.
- How many countries do you operate in? A single-country setup may only need one national payroll bureau. As operations expand across multiple countries, businesses often adopt global payroll solutions to consolidate reporting and administration.
- How much compliance and employer risk are you willing to manage internally? If your finance and legal teams want to minimize exposure while testing or scaling internationally, an EOR is often the lower-risk option until local volume justifies creating an entity.
The Bottom Line
A payroll bureau is a payroll-runtime service. An EOR is a legal-employer service. They sit at different layers and they often coexist in the same company. The right question is not “which one do we buy.” The right question is “for which countries does each one make sense?” In practice, most growing companies run a bureau in their home country and an EOR in every country where they want to hire without standing up an entity, and migrate from EOR to incorporation plus a local bureau as country-level headcount grows.
Frequently Asked Questions
A payroll bureau processes payroll on behalf of your existing entity. The bureau calculates tax and social contributions, files statutory returns (RTI to HMRC in the UK, 941s and W-2s in the US), issues payslips, and handles year-end. Your company is still the legal employer. An EOR is the legal employer of your worker in a country where you have no entity. The EOR signs the local employment contract, runs payroll under its own employer numbers, makes statutory contributions, and carries employer liability. The bureau is a payroll-runtime service. The EOR is a legal-employer service.
No, not in countries where you have no legal entity. A bureau processes payroll for an existing employer. It cannot become the legal employer for you. If you try to run payroll for a foreign worker through your home-country payroll bureau, you create permanent establishment risk, misclassification exposure, and potential personal tax disputes for the worker. The two services solve different problems. An EOR creates the employment relationship in a country where you do not have an entity. A payroll bureau operates payroll inside an employment relationship that already exists.
Bureau pricing is per-payslip, typically £4 to £15 in the UK or $5 to $25 in the US, with smaller employers often on a flat monthly fee. For a 25-person UK team at £8 per payslip, that is roughly £200 per month plus VAT. EOR pricing is a flat fee per employee per month, usually $400 to $700, on top of gross salary and statutory employer contributions. For 25 employees abroad an EOR could cost £10,000 to £14,000 per month in fees alone. The bureau is cheaper per head where you have an entity. The EOR is the only legal option where you do not.
Use a payroll bureau when you already have a legal entity in the country and want to outsource the payroll runtime, statutory filings, and year-end administration. Use an EOR when you want to hire in a country where you have no entity, when you are testing demand in a new market, when you need a worker payroll-ready in two weeks, or when you want to offload termination administration in a small market you are winding down. Most growing companies run both: a bureau in the home country and an EOR in countries where they have not yet incorporated.
Yes. The bureau handles payroll calculations and statutory payroll filings; it does not file your annual statutory accounts, prepare your corporation tax return, or maintain your bookkeeping. In the UK, you still need an accountant or finance team for Companies House filings, the corporation tax return, VAT returns if registered, and management accounts. In the US, the bureau handles 941s and W-2s, but state corporate income tax, federal corporate income tax, sales tax, and bookkeeping all sit outside the bureau's scope.
The common trigger is around fifteen to twenty employees in a single country with an eighteen-month-plus outlook on stable headcount. Below that threshold, EOR fees usually beat the cost of standing up an entity, hiring a local accountant, and running payroll. Above the threshold, the EOR's per-head fee starts to outweigh local entity overhead, and you also gain control over benefits, equity, and termination economics. Switching takes around three months and requires careful handling of tenure, accrued holiday, and severance reserves under the local labor code.
Partly. A bureau handles payroll-tax calculations, statutory filings, payslip delivery, and year-end. It does not carry employer liability for misclassification, wrongful dismissal, statutory leave entitlements, or contract enforcement. Those sit with your entity, because your entity is the legal employer. An EOR carries those operationally because it is the legal employer. If your concern is local labor-law exposure (terminations, sick leave, parental leave, holiday pay), an EOR shoulders more of that risk. A bureau is a payroll-execution service, not a legal-employer service.
Yes, and most growing companies do. The pattern is a payroll bureau in the home country (a UK Ltd through a UK bureau, or a US Inc. through a US payroll service) plus an EOR for any other country where you want to hire without standing up an entity. As headcount in any single foreign country grows past your threshold, you incorporate locally, hire a local accountant, onboard a local bureau, and migrate the EOR-employed workers onto the new entity. The hybrid model is the lowest-total-cost answer for a multi-country footprint.
