Pro rata salary calculator
Pro rata pay is in proportion to your hours. Working 22.5 hours on a 37.5-hour full-time week gets you 60% of the full-time salary, so £30,000 becomes £18,000.
- A month
- £1,500.00
- A week
- £346.15
- Hourly rate
- £15.38
- Share of full time
- 60.0%
22.5 hours a week out of a full-time 37.5, on a full-time salary of £30,000. Before tax and other deductions.
Before Income Tax, National Insurance, pension and other deductions. Your hourly rate stays the same as a full-time worker’s.
Pro rata salaries
Yearly pay before tax, based on a 37.5-hour full-time week.
| Full-time salary | 15 hours | 22.5 hours | 30 hours |
|---|---|---|---|
| £25,000 | £10,000 | £15,000 | £20,000 |
| £30,000 | £12,000 | £18,000 | £24,000 |
| £40,000 | £16,000 | £24,000 | £32,000 |
| £50,000 | £20,000 | £30,000 | £40,000 |
How we calculate this
Acas says part-time workers should get pay and leave “pro rata”, which means in proportion to the hours they work. We divide your hours by the full-time hours and multiply the full-time salary by that share.
The hourly rate is the full-time salary divided by 52 weeks of full-time hours, which is the same for you and a full-time colleague.
Questions people ask
What does pro rata mean on a job advert?
It means the salary shown is the full-time figure, and you will be paid a share of it based on your hours. “£30,000 pro rata” for a job at 60% of full-time hours pays £18,000.
Is holiday pro rata too?
Yes. Most full-time workers get at least 5.6 weeks of paid holiday a year, and part-time workers get the same number of weeks, which works out as fewer days. Someone working 3 days a week gets at least 16.8 days.
How do I work out pro rata if I know my days, not hours?
Use days instead: put 5 as the full-time figure and your days as your figure. Three days a week is 60% of a 5-day salary.
Does this include tax?
No. These figures are before Income Tax, National Insurance, pension contributions and student loan repayments.
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