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Your salary after 2026/27 income tax, National Insurance, pension and student loan.
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Pro-rata salary calculator
A pro-rata salary is the full-time salary multiplied by your hours over the full-time hours. Enter the advertised salary and your hours to see your actual pay, hourly rate, holiday and take-home.
£
37.5 in the NHS and most offices; check the advert.
28 days is the statutory minimum for a five-day week.
Pro-rata salary
£18,000a year
60% of full time · £1,500.00 a month before tax
- Hourly rate
- £15.34
- Weekly pay (gross)
- £345.20
- Pro-rata holiday
- 16.8 days (126 hours)
- Take-home, no pension or loan
- £1,373.30 a month
Pro-rata examples
| Full-time salary (37.5 hrs) | 30 hours | 22.5 hours (3 days) | 15 hours (2 days) |
|---|---|---|---|
| £25,000 | £20,000 | £15,000 | £10,000 |
| £30,000 | £24,000 | £18,000 | £12,000 |
| £35,000 | £28,000 | £21,000 | £14,000 |
| £40,000 | £32,000 | £24,000 | £16,000 |
| £50,000 | £40,000 | £30,000 | £20,000 |
How it's worked out
Pro-rata pay is the full-time salary multiplied by your contracted hours divided by the full-time hours. Holiday is pro-rated the same way, and is clearer counted in hours when your days vary in length.
Take-home is worked out on the pro-rata salary with 2026/27 income tax and National Insurance, before any pension or student loan.
Common questions
- How do you calculate a pro-rata salary?
- Divide your hours by the full-time hours and multiply by the full-time salary. £30,000 full time on 37.5 hours, worked at 22.5 hours a week, is 22.5 ÷ 37.5 × £30,000 = £18,000.
- What does pro rata mean on a job advert?
- The salary shown is the full-time figure, and you will be paid a share of it in proportion to your hours. '£30,000 pro rata, 3 days a week' means £18,000 for a five-day full-time week of 37.5 hours.
- How is part-time holiday worked out?
- The same way: the full-time entitlement times your share of full-time hours. 28 days full time becomes 16.8 days at 60%, and it is clearer to count it in hours if your days vary in length.
- Is part-time take-home simply a share of full-time take-home?
- No — it is usually a bit more than that share, because more of a smaller salary falls inside the £12,570 tax-free allowance.
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