Pro rata salary calculator (UK)
Find your part-time salary from the full-time salary in a job advert.
- Type the full-time salary.
- Type full-time hours and the hours you will work.
- See your pro rata salary and take-home pay.
- Pro rata salary
- £18,000.00
- A month before tax
- £1,500.00
- Take-home a month
- £1,373.30
- Share of full-time
- 60%
Take-home is for England, Wales and NI in 2026/27, with no pension or student loan.
How pro rata salary works
Pro rata salary = full-time salary × your hours ÷ full-time hours. For a £30,000 job at 22.5 of 37.5 hours: £30,000 × 22.5 ÷ 37.5 = £18,000.
Pro rata on £30,000 (37.5-hour week)
| Days a week | Hours | Pro rata salary | A month |
|---|---|---|---|
| 1 | 7.5 | £6,000 | £500.00 |
| 2 | 15 | £12,000 | £1,000.00 |
| 3 | 22.5 | £18,000 | £1,500.00 |
| 4 | 30 | £24,000 | £2,000.00 |
| 4.5 | 33.75 | £27,000 | £2,250.00 |
More UK calculators
Frequently asked questions
What does pro rata mean?
It means “in proportion”. A pro rata salary is the full-time salary scaled to the hours you work.
How much is £30,000 pro rata for 3 days a week?
£18,000 a year (3 ÷ 5 of £30,000), or £1,500.00 a month before tax.
Is holiday pro rata too?
Yes. Part-time workers get 5.6 weeks of their normal working week. For 3 days a week that is 16.8 days.