International payroll providers run pay for employees outside the country where the employing company sits: calculating gross-to-net under each country's rules, filing the withholdings, and paying people in local currency on local paydays. For a UK company the distinction that matters is between software that helps you file, a bureau that files for you, and an employer of record that becomes the legal employer abroad. The legal duty never moves with the spreadsheet: HMRC's position is that an employer must operate PAYE and National Insurance for anyone working in the UK, and every other tax authority takes the same view of work done on its soil. A provider changes who does the arithmetic, not who owes the answer.
The three service models, and who stays liable
An aggregator gives one dashboard and one invoice, then executes through in-country partners; the client company remains the registered employer in each country and keeps every filing obligation in its own name. An in-country payroll bureau runs one country deeply, which suits a company that already has an entity there. An employer of record goes furthest: it employs the worker through its own local entity, so the registrations, filings and employment liabilities sit with the provider rather than the client. The honest way to choose is to ask where you have entities. Where you have one, you need payroll processing; where you have none, a processor cannot help you because there is no registered employer for it to process on behalf of.
The UK baseline: what PAYE requires of any employer
HMRC's employer guidance sets the frame a provider has to satisfy for UK staff. An employer must register for PAYE when any employee is paid £96 or more a week or receives benefits, must deduct tax and National Insurance from pay, and must report payments and deductions to HMRC on or before each payday under Real Time Information. Payment to HMRC usually runs monthly, though an employer expecting to owe under £1,500 a month can arrange to pay quarterly. Even a foreign company with no UK presence is caught: HMRC's guidance on employees coming from abroad states that if the person is still employed by an overseas business, the UK host is still treated as their employer for PAYE purposes. A provider that cannot show you the RTI submissions it files is asking to be trusted on the one thing you cannot afford to take on trust.
What multi-country payroll actually costs
Pricing follows the model. Software and aggregator plans are typically quoted per employee per month, with the per-head rate falling as countries consolidate onto one platform and rising for countries with heavier filing burdens. In-country bureaux quote per payslip plus setup and year-end fees. EOR pricing is the highest per head because it includes carrying the employment itself, and it is the model this site verifies vendor by vendor against published pricing pages. Whichever model you buy, the employer's statutory on-costs, National Insurance in the UK and its equivalents abroad, are pass-through costs that no provider's fee removes; a quote that blurs the fee into the on-costs is understating one or overstating the other.
What to check before signing
Ask whether the provider files in its own name or yours, because that single fact decides who a tax authority pursues when a filing is late. Ask for the payment calendar per country, since local paydays and filing deadlines do not respect a head-office month end. Ask how corrections work: a reversed payment or a backdated pay rise touches filed returns, and a provider that handles corrections by email ticket will eventually leave one unfiled. Finally, ask what happens at exit; your payroll history, year-to-date figures and filing credentials have to transfer cleanly to a successor, and the time to establish that is before the first payslip, not after the last one.
Questions people ask about international payroll providers
Does using a payroll provider move my PAYE liability to them?
No. A provider can calculate, file and pay on your behalf, but the registered employer remains responsible to HMRC for PAYE and National Insurance. Only an employer of record changes who the employer is, because it employs the worker through its own entity.
Can a UK company pay overseas staff through its UK payroll?
Not compliantly, in most cases. Work performed in another country creates employer obligations under that country's law, which UK PAYE does not discharge. The choices are registering locally, using an in-country provider once registered, or an employer of record where no entity exists.
When does a foreign employer have to run UK payroll?
HMRC treats the UK business hosting a seconded worker as the employer for PAYE even if the overseas company keeps paying them, and requires PAYE and National Insurance to be operated for employees coming to work in the UK from abroad.
Is an aggregator cheaper than separate in-country bureaux?
Usually at small headcounts, because one contract replaces many minimums. At larger headcounts per country, a direct bureau or in-house team often undercuts the aggregator's per-head rate. The crossover is worth modelling before a multi-year contract.