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.
Related calculators
See all United Kingdom calculators → · All free online calculators
Found an error? Report it — tell us the inputs, the result you got, what you expected and the rule or source. Confirmed corrections are published within a week.
Ready to build your next digital solution?
Send the brief and you get a scoped response with approach, milestones and a fixed price range. Not a sales call.
A 30-minute call with the engineer who would run your project
Within 2 business daysA written scope: approach, module breakdown, milestones, fixed price range
Within 5 business daysYou decide. No retainer, no obligation, and the scope document is yours to keep either way
Your timelineSend your brief
Three fields to start. Add project details if you have them.