PAYE, PRSI and USC Explained for Irish Employers
Every Irish payslip carries three deductions that often get lumped together as "tax" — but PAYE, PRSI, and USC are actually three separate things, each with its own rules. Here's what each one does and what it means for running payroll correctly.
What is PAYE?
PAYE (Pay As You Earn) is Ireland's system for collecting income tax directly from wages, in real time, each pay period. Since PAYE Modernisation, employers report pay and deductions to Revenue via ROS on or before each payday — there's no waiting for an annual return to true things up.
What is PRSI?
PRSI (Pay Related Social Insurance) funds Ireland's social welfare system — things like the State Pension, illness benefit, and maternity benefit. Both employees and employers pay PRSI, at different rates and classes depending on employment type and earnings.
What is USC?
USC (Universal Social Charge) is a separate tax on gross income, calculated independently of PAYE and PRSI. It applies on a sliding scale based on income bands, and — unlike PAYE — has its own separate set of thresholds and exemptions.
How do they interact on a payslip?
All three are calculated from gross pay but as separate line items, each with its own rate structure:
- PAYE reduces taxable income based on tax credits and rate bands
- PRSI is calculated by class and rate on gross pay
- USC is calculated on gross income in bands, largely independent of tax credits
Getting any one of these wrong on a consistent basis is exactly the kind of thing a WRC inspection or Revenue audit will catch.
What about P45s and P60s?
Under PAYE Modernisation, the traditional paper P45 and P60 have largely been replaced by real-time reporting. Employees can access equivalent end-of-employment and end-of-year statements through Revenue's myAccount service, and most payroll software generates the equivalent documentation automatically.
What is ROS?
ROS (Revenue Online Service) is the platform through which employers submit payroll data, ERR reports, and other Revenue filings. Since PAYE Modernisation, payroll submissions to ROS happen every pay run, not just at year-end.
What do employers need to get right?
- Correct tax credits and rate bands applied per employee (via Revenue's RPN — Revenue Payroll Notification)
- Correct PRSI class based on employment type
- Accurate USC banding based on gross income
- Real-time ROS submission on or before each payday
- Correct handling of auto-enrolment pension deductions (My Future Fund, live since January 2026) and ERR reporting for non-taxable benefits
How CloudHR helps
CloudHR's Irish payroll module calculates PAYE, PRSI, and USC automatically per employee, pulls RPNs directly, and submits to ROS in real time — with auto-enrolment and ERR handled in the same run, rather than as separate manual steps.
FAQ
What's the difference between PRSI and USC? PRSI funds social welfare entitlements and is calculated by class and rate; USC is a separate income tax with its own bands, independent of PRSI or tax credits.
Do I still need to issue a P45 in Ireland? Not in the traditional paper sense — under PAYE Modernisation, the equivalent information is reported to Revenue in real time and accessible to employees through myAccount, though most payroll software still generates an equivalent document.
What is an RPN? A Revenue Payroll Notification — the file Revenue sends employers with an employee's correct tax credits and rate bands, used to calculate PAYE accurately each pay run.
How often does payroll need to be reported to Revenue? Every pay run, on or before payday — not just at year-end.
This article is general guidance, not tax advice. Rates, bands, and thresholds change annually — always confirm current figures with Revenue.ie.
