How to Run Payroll in 6 Countries From One Platform

Running payroll in six countries sounds like six payroll systems. It does not have to be. This article explains how a single, configuration-driven platform runs payroll across the UK, Ireland, the US, the UAE, India, and Australia — and what that means in practice for the person who has to do it each month.

The principle: one engine, six configurations

The wrong way to build multi-country payroll is to write a separate system for each country. It is expensive, it is inconsistent, and it means six things to maintain when tax rates change.

The right way is one calculation engine that reads a configuration file for each country. The engine knows how to apply income tax bands, social insurance, deductions, and statutory pay. The configuration tells it what those bands and rates are for a given country and tax year. Adding a country means adding a configuration, not rewriting the engine.

This is how Mellow's payroll works. One engine; six country configurations.

Run six countries on one engine and a pay run feels the same everywhere — the rules change, the process does not.

What that means month to month

The process is consistent. Whether you are running a UK pay run or an Australian one, the steps are the same: confirm the employees and their pay, run the calculation, review the result, approve it. You learn the process once.

The rules are correct per country. Behind that consistent process, each country's configuration applies the right rules — PAYE and National Insurance for the UK, USC and PRSI for Ireland, federal and state tax for the US, end-of-service gratuity for the UAE, TDS and PF and ESI for India, PAYG and superannuation for Australia.

Each country has the right tax year. The UK runs April to April, Ireland and the US run the calendar year, India runs April to March, and Australia runs July to June. The platform handles each correctly.

Submission is guided per country. For the UK, Mellow submits RTI directly to HMRC via GovTalk XML. For the other five, Mellow produces the calculated result and a step-by-step guide for the local authority — ROS for Ireland, Form 941 for the US, the WPS file for the UAE, TRACES and EPFO and ESIC for India, and STP for Australia.

What you still do yourself

Outside the UK, Mellow does not file with the tax authority for you — it calculates accurately and guides the submission. That is deliberate. It keeps you in control of your own government credentials and filings, and it is how most international payroll platforms operate today. Direct integration for more countries is a planned enhancement.

The honest scope

This works for the six countries Mellow supports. It is not a 150-country solution and it does not include Employer of Record. If your payroll spans countries outside those six, you will need something else for the remainder.

But for a business operating across some or all of those six countries, one platform — one process, one employee database, one set of reports — is dramatically simpler than six. See Mellow pricing.