If you are employed in Ireland, you almost never send money to the tax office yourself. Instead your employer calculates the tax on each payslip and pays it over to Revenue on your behalf. That system is called Pay As You Earn, or PAYE. It is efficient once it is set up correctly, but a newcomer who does not understand how it works can lose a large slice of their first few pay packets to emergency tax. This guide explains the mechanics, what each line on your payslip means, and when money comes back to you.
How the system works
Since 2019 Irish payroll has operated in real time. Every time you are paid, your employer reports the pay and deductions to Revenue on or before payday. That is why you can log in to myAccount and see your year-to-date pay within days. It also means mistakes are corrected quickly: update your details with Revenue and a new RPN normally reaches your employer before the next pay run.
Cumulative basis versus week 1 basis
The normal method is the cumulative basis. Your annual credits and rate band are spread across the year, and each payday the payroll looks at your total pay and total tax so far. If you started in June, the credits for January to May are still available, so you may pay almost no tax until you have used them up. The alternative is the week 1 or month 1 basis, where each payslip is calculated in isolation. Revenue applies week 1 when it is unsure of your circumstances, for example when you have moved between jobs and the old employer has not yet reported your final pay. It is not a penalty, but it can leave you overpaid, which is settled when you file a return after year end.
Emergency tax
Emergency tax applies when the employer cannot get an RPN for you. There are two versions, and the difference is big.
| Situation | Income tax charged | USC charged |
| PPS number given, but job not registered with Revenue | Weeks 1 to 4: 20% up to the single rate band cut-off (€44,000 a year, or €846 a week) and 40% above, with no credits. Week 5 onwards: 40% on everything. | 8% on all pay |
| No PPS number given to employer | 40% on everything from the first payslip | 8% on all pay |
On a €3,000 monthly salary the emergency deductions in month 2 onwards can exceed €1,400. Avoiding this takes two steps: get a PPS number before or immediately after arrival, and register your job in myAccount if your employer has not done it for you (the article on Revenue myAccount in this section walks through the steps). Emergency tax is always refunded once your RPN is in place, usually through your next payslip on the cumulative basis.
Reading an Irish payslip
Payslip layouts vary, but the same lines appear on nearly all of them.
- Gross pay: your salary for the period before any deductions, including overtime and bonuses.
- PAYE or Income tax: the tax calculated from your rate band and credits. Some payslips show the credit and cut-off point used.
- USC: the Universal Social Charge, shown separately because it has its own bands.
- PRSI EE: your own social insurance contribution, 4.2% in Class A until 30 September 2026 and 4.35% from 1 October 2026. PRSI ER is the employer's contribution and is shown for information only.
- Pension: any contribution to an occupational or auto-enrolment (My Future Fund) scheme.
- Insurable weeks: the number of PRSI weeks credited in the period, which matters for your future benefit entitlements.
- Net pay: what is transferred to your bank account.
The year-to-date columns are the ones to watch. If they reset unexpectedly, or if the tax credit figure is zero, it usually means an RPN problem.
When you get a refund
Refunds arrive in three ways. First, through payroll: when a missing RPN arrives or you claim a new credit mid-year, the cumulative calculation gives back any overpayment in the next pay run. Second, if you leave a job and are out of work for more than 4 weeks, you can claim a refund of tax already paid through myAccount. Third, after the year ends, Revenue publishes a Preliminary End of Year Statement in myAccount every January. If you file an income tax return (Form 12 online), you receive a Statement of Liability, and any overpayment is transferred to your bank account, usually within a few days. You can go back 4 years, so in 2026 you can still claim for 2022 onwards.
Most people leave money on the table by not claiming credits: rent, medical expenses (20% of GP, consultant and prescription costs), the remote working relief and flat-rate expenses for certain trades all go through the same return. Set a reminder each January.
