Starting a Payroll Bureau in Ireland: Revenue, PRSI, and Setup

Ireland is a strong market for payroll bureaus. Its economy is full of small and medium employers who would rather outsource payroll than master Revenue's requirements themselves. But Irish payroll has its own rules, and a bureau here must get them right. This guide covers starting a payroll bureau in Ireland — Revenue, PAYE, USC, PRSI, and the software to handle them.

Irish payroll: the four pillars

Irish payroll differs from the UK's, and a bureau must be fluent in four areas:

- PAYE — income tax deducted at source, under Revenue's real-time PAYE Modernisation regime.

- USC — the Universal Social Charge, a separate charge on income with its own bands.

- PRSI — Pay Related Social Insurance, contributions from both employee and employer.

- Real-time reporting to Revenue — Ireland operates real-time payroll reporting, so each pay run must be reported to Revenue at the time of payment.

A bureau that treats Irish payroll like UK payroll will get it wrong. The engines are genuinely different.

Setting up as a bureau in Ireland

You will register your business and, to act for clients, register with Revenue as an agent so you can manage their payroll and reporting through Revenue Online Service (ROS). Because you process personal data, data protection obligations under GDPR apply, and you should have processing agreements with each client. Professional indemnity insurance is, as in the UK, effectively essential.

Choosing software that genuinely handles Ireland

This is where many bureaus stumble. A lot of payroll software is UK-first, with Ireland bolted on imperfectly. You need a platform with a real Irish engine — one that correctly computes PAYE, USC, and PRSI and reports to Revenue in real time, not one that approximates Irish rules from a UK base.

Mellow runs genuine, per-country payroll across six countries, with a real Irish engine handling Revenue, PAYE, USC, and PRSI — not a UK fallback. For a bureau, that means you can process Irish clients confidently from the same multi-client dashboard you use for everything else, with a client switcher, cross-client compliance, and practice team roles.

The cross-border advantage

Many Irish bureaus serve clients who also employ in the UK, or vice versa. A platform that handles both UK and Irish payroll from one login is a real edge — see multi-country payroll for accountants: UK and Ireland in one platform. Rather than running two systems, you run one, with each country's rules applied correctly by its own engine.

Compliance discipline

Real-time reporting to Revenue means deadlines are unforgiving across every client. A cross-client compliance view — showing which Irish clients have been reported and which are outstanding — is your best protection, just as it is in the UK. Mellow's Predictive Compliance agent flags risks ahead of time across your whole base.

Building toward advisory

As in the UK, Irish bureaus can grow beyond processing into advisory. Because you hold each client's employee data, you can offer people insight, compliance support, and HR guidance. Mellow's practice-aware agents support this across your Irish and UK clients alike.

Starting a payroll bureau in Ireland comes down to three things: genuine fluency in Revenue, PAYE, USC, and PRSI; software with a real Irish engine rather than a UK approximation; and the discipline to report to Revenue on time across every client. Get those right and the Irish market offers the same dependable, recurring revenue as the UK.