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Gross figures, before tax and deductions. Holiday entitlement is also pro rated: the statutory minimum of 5.6 weeks applies to your working pattern, so someone on 3 days a week gets 16.8 days including bank holidays.
What The Pro Rata Salary Calculator Works Out
- Pro rata annual salary: the full-time salary divided by full-time hours, multiplied by your hours. On a 37.5-hour full-time week, 22.5 hours (three days) on a GBP 30,000 full-time equivalent pays GBP 18,000, which is 60% of full time. UK full-time weeks are usually 35, 37.5 or 40 hours.
- Monthly and weekly: the pro rata annual figure divided by 12 and by 52. The hourly rate shown does not change: part-time workers earn the same per hour as full-time colleagues on the same grade and have a legal right not to be treated less favourably.
- Holiday entitlement (advanced): the full-time holiday allowance (28 days is the statutory 5.6 weeks for a five-day week, including bank holidays) scaled by your hours and expressed in your working days. Three days a week gives 16.8 days; people on short days get more days of fewer hours, which is why the hours figure is shown too.
- Term-time / part-year salary (advanced): for term-time-only or seasonal contracts, enter the weeks you work. Pay is weeks worked plus pro rated holiday (5.6 weeks for every 46.4 worked), so 39 term weeks become about 43.7 paid weeks. Employers differ on this formula, so check how yours defines it.
- Pro rata bonus or allowances (advanced): bonuses, London weighting and similar allowances are normally scaled by the same hours fraction as salary.
- Monthly after pension (advanced): gross monthly pay after your pension percentage. Auto-enrolment applies from GBP 10,000 a year with a 5% employee minimum (including tax relief) and 3% from the employer, so part-timers under that figure may need to opt in.
- Daily rate (advanced): the annual figure divided by 52 and your working days, useful for checking a payslip after an unpaid day or comparing with a day-rate role.
- Starting or leaving mid-year: the same maths applies to part years (days worked divided by days in the year). Figures here are gross; use a take-home pay calculator for the net amount.
Source and further reading: GOV.UK: minimum wage rates.