Pro rata salary calculator
Work out a part-time or term-time salary from the full-time salary, by hours or days a week. Shows the pay a year, a month and a week, and the hourly or daily rate.
- Your salary a year for 22.5 hours a week
- £18,000
- 22.5 hours out of 37.5 hours is 60% of full time, so you get 60% of £30,000.
- A month
- £1,500
- a year ÷ 12
- A week
- £346.15
- a year ÷ 52
- Pay for each hour
- £15.38
- the same hourly rate as full time
These are before tax. Part-time workers must get the same hourly rate as comparable full-time staff, and things like bonuses in proportion to their hours (GOV.UK, part-time worker rights). A full-time week is usually 35 hours or more, so check the figure your employer uses.
Term time only divides your paid weeks by 52.143, the weeks in a year (365 ÷ 7), as councils and schools commonly do. Paid weeks are the weeks you work plus your paid holiday: 39 weeks plus the legal minimum of 12.07% is 43.71. Your contract may give more holiday, and some employers use a slightly different method, so check your contract or payslip.
How pro rata pay works
Pro rata means in proportion to the hours you work. If a job pays £30,000 for a 37.5-hour week and you work 22.5 hours, you work 60% of full time, so you’re paid 60% of £30,000: £18,000 a year, or £1,500 a month before tax.
Part-time workers must get the same pay rates as comparable full-time staff. GOV.UK’s example is a £1,000 Christmas bonus for full-time staff, which is £500 for someone who works half the hours.
Hours or days
Use hours if your days are a different length from a full-time day. If you work full days, 3 days out of 5 gives the same 60%.
The full-time week varies between employers. GOV.UK says a full-time worker will usually work 35 hours or more a week, so use the figure in the job advert or your contract.
Term-time contracts
If you’re paid only for school terms plus your holiday, choose term time only and enter your paid weeks. Councils and schools usually scale the salary by your paid weeks out of 52.143, the weeks in a year (365 ÷ 7), then pay it in 12 equal parts. Paid weeks are the weeks you work plus your paid holiday. For 39 weeks at the legal minimum holiday of 12.07%, that’s 43.71 weeks, so the same 22.5-hour job pays 60% × 83.8% of £30,000, or £15,088.93. Council staff on national terms usually get more holiday than the minimum, so use the paid weeks on your contract or payslip.
Holiday
Part-time staff get the same 5.6 weeks of statutory holiday, in proportion to their days: 3 days a week is at least 16.8 days a year. The holiday entitlement calculator works it out, including when you start or leave part way through the year.
Sources
- Part-time workers’ rights, GOV.UK
- Holiday entitlement, GOV.UK
- NJC guidance on term-time only employees, Local Government Association