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Pro rata salary calculator Ireland
How the pro rata salary calculator works in Ireland
"Pro rata" means in proportion. To scale a full-time salary to part-time hours, multiply it by the share of full-time hours you work:
A €50,000 role advertised at 39 full-time hours, worked at 24 hours a week, pays €50,000 × 24 ÷ 39 = €30,769 — that's 61.5% of full time, or about €2,564 a month. No tax data is used, so the result never goes out of date.
This is the gross pro-rata figure. Drop it into the net salary calculator to see take-home pay after income tax, USC and PRSI.
When pro rata pay is used in Ireland
There's no single legal formula for pro rata in Ireland — Revenue and employment law don't prescribe one, so employers pick a method and apply it consistently. The two common approaches are:
- By hours (what this calculator uses): full-time salary × your hours ÷ full-time hours. Best for part-time and job-share roles.
- By days/weeks worked: full-time salary × days worked ÷ total working days. Used for mid-year starters and the Shorter Working Year Scheme.
You'll see pro rata pay come up for:
- Part-time and job-share contracts — your salary scaled to the hours you work.
- Term-time roles (common in schools) — paid for the weeks actually worked.
- Starting or leaving mid-year — only the portion of the year you're employed.
- Annual leave and public holidays — part-time staff get these pro rata too, under the Organisation of Working Time Act 1997.
Whichever method your employer uses, the result is your gross pay — run it through the net salary calculator for take-home after tax.
Frequently asked questions
How is a pro rata salary calculated in Ireland?
Multiply the full-time salary by your hours ÷ full-time hours. €50,000 × 24 ÷ 39 = €30,769 pro rata.
What does "pro rata" mean?
"In proportion." It scales a full-time salary down to the share of full-time hours you actually work.
Is there a legal pro rata formula in Ireland?
No. Neither Revenue nor employment law sets one formula, so employers choose a method (by hours, or by days/weeks worked) and apply it consistently. The hours method is the most common for part-time and job-share roles.
How does pro rata work for a job share?
Each person's salary is the full-time salary scaled to their share of the hours. Two people splitting a 39-hour role at 19.5 hours each are on 50% pro rata pay.
Do part-time staff get holidays pro rata?
Yes — annual leave and public-holiday entitlements are given pro rata to part-time employees under the Organisation of Working Time Act 1997.
Is the figure before tax?
Yes, it's gross. Use the net salary calculator for take-home pay.
Related Ireland calculators
A maths tool giving gross figures only — not tax advice. See our methodology and the net salary calculator for take-home pay.