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Payroll Mistakes Irish Employers Keep Making (And How to Fix Them)

Declan Farrell · Payroll & Finance Director · 31 May 2026 · 6 min read · 26 views
Payroll Mistakes Irish Employers Keep Making (And How to Fix Them)

Payroll Errors Are More Common Than You Think

Revenue's compliance programme audits thousands of Irish employers every year, and payroll errors are consistently among the top findings. Most errors are not caused by dishonesty — they are caused by manual processes and disconnected systems.

Mistake 1: Wrong PRSI Class

The most common error is applying Class A1 to workers who should be on Class S (self-employed directors) or Class J (employees earning under €38/week).

Fix: Your HRM system should capture employment type at hire and auto-suggest the correct PRSI class.

Mistake 2: Not Registering Employees on ROS Before First Pay Date

Employers must register a new employee on Revenue's Online Service (ROS) before running their first payroll. Failure means emergency tax rates — and a messy correction process.

Fix: Onboarding workflows in CloudHR include Revenue registration as a blocking task before the first pay run is approved.

Mistake 3: Benefit-in-Kind (BIK) Miscalculation

Company cars, health insurance, and other non-cash benefits are subject to BIK taxation. The rules changed significantly in 2023 with the CO2-based BIK system for vehicles — many employers are still applying old calculations.

Mistake 4: Overtime and Premium Pay Errors

Sunday premiums, shift allowances, and overtime rates are often calculated manually and inconsistently. Time and attendance data should flow directly from your HRM system into payroll.

Mistake 5: Incorrect End-of-Year Returns

Under PAYE Modernisation (live since 2019), Irish employers submit payroll data to Revenue in real time. Employer-side reporting errors cause reconciliation issues that take weeks to resolve.

The Common Thread

Every error above shares one root cause: data living in the wrong place at the wrong time. When employment details, attendance, benefits, and payroll are managed in a single HRM platform, the data is always current, consistent, and audit-ready.

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Written by

Declan Farrell

Payroll & Finance Director

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