UK Pro-Rata Salary Calculator
Convert a full-time salary to part-time pro-rata pay from your weekly hours or days, with the hourly rate, monthly pay and pro-rated holiday entitlement.
| FTE fraction | — |
|---|---|
| Hourly rate | — |
| Monthly pay (gross) | — |
| Weekly pay (gross) | — |
| Pro-rata holiday | — |
In short
Pro-rata salary = full-time salary × (your weekly hours ÷ full-time hours), with 37.5 hours the usual UK full-time week: £32,000 FTE on 22.5 hours is £19,200. The hourly rate is salary ÷ (FTE hours × 52.143), and holiday is pro-rated from 28 days (5.6 weeks) — 16.8 days for a 3-day week.
Who this is for: Part-time and term-time workers, and employers, converting a full-time salary to pro-rata pay and holiday.
How pro-rata pay is calculated
Pro-rata salary is the full-time salary scaled by the fraction of full-time hours you work: salary × (your hours ÷ full-time hours). A 37.5-hour week is the most common full-time equivalent (FTE) in UK offices; the NHS uses 37.5, many councils 36 or 37, retail and manufacturing often 40. Always check which figure the job advert means — "£32,000 pro rata" on a 3-day week is £19,200 on a 5-day FTE.
- Hourly rate = salary ÷ (FTE hours × 52.143 weeks), the same for part-time and full-time staff.
- Holiday is pro-rated too: the statutory 5.6 weeks (28 days for a 5-day week, including bank holidays) becomes 16.8 days for a 3-day week — and is best tracked in hours for irregular patterns.
- Term-time only (school support staff, for example) are paid for the weeks worked plus pro-rated holiday, usually 43–47 paid weeks out of 52.14, spread over 12 equal monthly payments.
See also: UK Take-Home Pay Calculator 2026/27.
Assumptions
- FTE fraction = your hours ÷ FTE hours (days ÷ 5 × FTE hours in days mode).
- Hourly rate = FTE salary ÷ (FTE hours × 52.143).
- Term-time: paid weeks = worked weeks + pro-rated holiday weeks, spread over 12 months; holiday days = FTE holiday × fraction.
Worked example
FTE fraction = 22.5 ÷ 37.5 = 60% → pro-rata salary £19,200, £1,600 a month gross.
Hourly rate = 32,000 ÷ (37.5 × 52.143) = £16.36. Holiday = 28 × 60% = 16.8 days (126 hours).
Frequently asked questions
Does pro-rata mean I get fewer bank holidays?
You get a pro-rated share of them. Employers usually add bank holidays to the annual total (28 days for full-time) and pro-rate the whole figure, so someone who never works Mondays is not disadvantaged.
Is the hourly rate the same as a full-timer's?
Yes, by law — part-time workers cannot be paid a lower hourly rate or receive less favourable benefits than comparable full-time colleagues.
How do I convert my part-time salary back to FTE?
Divide by your FTE fraction: £19,200 on 60% = £32,000 FTE. Job adverts and pension schemes usually quote the FTE figure.
What about a 4-day compressed week on full-time hours?
If you still work 37.5 hours over 4 days, your FTE fraction is 100% and nothing is pro-rated.
What does £30,000 pro rata mean for 3 days a week?
£18,000 a year (60% of the full-time salary) with 16.8 days' holiday instead of 28.
How do I calculate pro rata holiday?
Full-time days × your FTE fraction; for irregular hours use 12.07% of hours worked.
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