Irish Pro-Rata Salary Calculator
Convert a full-time-equivalent salary to the pay you actually get for your hours and weeks, then see it after tax.
Married with one income gets a wider 20% band and larger credits.
Enter the full-time salary above.
PRSI Class A (employee). Standard credits: personal and PAYE. Not modelled: medical card USC rate, rent credit, home carer credit, other reliefs.
Your take-home pay · per month
€24,607 a year from €27,692 gross, you keep 88.9%
The pro-rata formula
Actual salary = full-time salary x (your weekly hours / full-time hours) x (weeks worked / 52). A €45,000 role at 24 of 39 hours pays about €27,700.
Term-time and job-sharing
If you work fewer than 52 weeks, enter the weeks you are paid for. Many employers then spread pay evenly across the year.
Tax on a lower income
Part-time pay usually sits mostly inside the 20% band, so the effective tax rate is lower than on the full-time salary.
Frequently asked questions
Figures use 2026 Irish rates. See the methodology.
How do I work out part-time pay from a full-time salary? +
Multiply the full-time salary by your hours divided by full-time hours. Three days of a five-day week is 0.6.
Is annual leave included? +
Most employers include it in the pro-rata salary; term-time contracts may handle leave differently.