A plain-English explanation of what a UK payroll bureau does, how the monthly process works, what is included in the service, and how it differs from payroll software or an accountant.
A payroll bureau manages the full monthly payroll process on behalf of a UK business. This includes collecting payroll data, calculating PAYE, National Insurance and pension deductions, producing payslips for all employees, filing RTI (Real Time Information) submissions with HMRC on or before each payday, processing starters and leavers, and providing a monthly employer summary with the HMRC payment figure. The business sends the data. The bureau handles everything else.
The monthly payroll process has more moving parts than most business owners realise until something goes wrong. A managed bureau owns all of them.
At the end of the tax year (April), the bureau completes the annual payroll close-down. This includes a final RTI submission marking the end of the year, production of P60 certificates for every employee, and the employer annual summary. For clients with benefits in kind, P11D filings are flagged — though P11D preparation itself is typically accountant territory.
A payroll bureau is a payroll specialist, not a general accountancy practice. It handles PAYE, NI, RTI, pension payroll and CIS. It does not prepare statutory accounts, file corporation tax returns, provide tax planning advice, prepare VAT returns or advise on director dividend strategy. Those services sit with the client's accountant.
This specialisation is a feature, not a limitation. A bureau that does only payroll does it at a higher standard than a general practice that treats payroll as one of many services.
Most small businesses use both. The accountant handles year-end accounts, corporation tax and strategic tax advice. The bureau handles monthly payroll. The two work in parallel, occasionally exchanging data — payroll journals for the accountant's bookkeeping, P60 copies at year end.
Some accountants refer their payroll clients to a bureau when payroll volume grows beyond what the practice wants to handle internally. The bureau delivers the service; the accountant retains the client relationship.
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