Pro-rata Salary Calculator UK
Work out your pro-rata salary from a full-time (full-time equivalent) figure based on the hours you work each week and weeks worked per year. Useful for part-time, term-time and reduced-hours roles.
Calculator
What this means
Pro-rata means 'in proportion'. If a role is advertised at a full-time salary, your actual pay is scaled to the share of full-time hours and weeks you work. This figure is gross — before tax and National Insurance.
How to use this calculator
- Enter the full-time salary for the role.
- Enter the full-time hours and the hours you actually work.
- See your pro-rata salary and equivalent pay.
Worked example
A £30,000 full-time role (37.5 hours) worked at 22.5 hours a week.
- You work 22.5 ÷ 37.5 = 60% of full-time hours.
- £30,000 × 60% = £18,000.
Your pro-rata salary is £18,000 a year.
Who this is for
- Part-time workers and job-sharers.
- People comparing a part-time offer with a full-time figure.
- Anyone returning to work on reduced hours.
How pro-rata pay works
Pro-rata simply means 'in proportion'. To find a part-time salary, divide your hours by the full-time hours, then multiply by the full-time salary.
The same proportion usually applies to holiday entitlement and some benefits. Tax and National Insurance are then worked out on the actual (lower) salary you receive.
Frequently asked questions
It is the proportion of a full-time salary you receive for working fewer hours or weeks. For example, working half the full-time hours usually means roughly half the salary.
Divide your weekly hours by the full-time hours, multiply by the weeks you work over 52, then multiply that proportion by the full-time salary.
Before tax. Enter the pro-rata annual figure into the PAYE Salary Calculator to estimate your take-home pay.
Yes. Your 5.6 weeks of statutory holiday is pro-rated to your hours, so part-time staff get proportionally fewer days but the same number of weeks.
No. A salary shown as 'pro-rata' is the full-time equivalent. You'll actually be paid the proportion that matches your contracted hours.
Disclaimer
This calculator provides estimates for guidance only. It is not financial, legal or tax advice. Always check official sources or speak to a qualified professional before making decisions.
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