UK Pro Rata Salary & Holiday Calculator

Pro rata is Latin for “in proportion”. A pro-rata salary is the full-time salary scaled to the hours you actually work. If a job pays £35,000 for 37.5 hours a week and you work 22.5 hours, you work 60% of full time, so you’re paid 60% of £35,000: £21,000 a year. Job adverts often show the full-time figure with “pro rata” after it, so check which one you’re looking at.

Everyone who works regular hours gets at least 5.6 weeks’ paid holiday a year. For a part-timer that’s the days you work a week times 5.6, so 3 days a week gives at least 16.8 days. If full-timers get more than the minimum, you should get the same share of it as your share of their hours. This calculator scales the full-time holiday by your hours and checks the result against the legal minimum.

There’s no legal right to have bank holidays off, but they can count towards your 5.6 weeks. Many employers give them on top of the contract’s holiday, and part-timers should then get a pro-rata share of them, not only the ones that fall on their working days. Choose whether bank holidays come on top (usually 8 in England and Wales, 9 in Scotland, 10 in Northern Ireland; Scotland has 10 in 2026 because of a one-off holiday on 15 June) or are already included.

The legal minimum of 5.6 weeks is capped at 28 days a year. It only matters if you work more than 5 days a week: 6 days times 5.6 would be 33.6 days, but the minimum stays at 28. Your employer can give you more, and the calculator compares your holiday with the capped minimum.

If your working days aren’t all the same length, counting holiday in days isn’t fair: a long day off uses more of your week than a short one. Many employers keep part-timers’ holiday in hours for that reason. The calculator shows both, counting a day as a full-time day (7.5 hours, if full time is 37.5 hours over 5 days).

You get a share of the year’s holiday for the part of the holiday year you work there. Open “Joining or leaving part way through the holiday year”, enter when your holiday year starts and your first or last day, and the calculator works out the exact figure by the day. Employers may round it, often up to the nearest half day. If you’re leaving, holiday you’ve built up but not taken is paid with your final pay.

If your hours change from week to week, or you only work part of the year, such as term time, holiday in Great Britain builds up at 12.07% of the hours you work in each pay period. That applies to leave years starting on or after 1 April 2024. So 80 hours’ work builds up 9.66 hours of holiday. The 12.07% is 5.6 weeks of holiday spread over the other 46.4 weeks of the year.

For irregular-hours and part-year workers, an employer can pay holiday pay with each pay packet instead of when you take the holiday: 12.07% of your pay for the period, on top. It must be shown separately on your payslip. You still take the time off, but it’s unpaid at the time, so it’s worth putting the money aside.

Full-time equivalent is your hours as a share of full time. 22.5 hours where full time is 37.5 hours is 0.6 FTE, or 60%. Employers use it to compare part-time and full-time jobs, and pro-rata pay and holiday are the full-time figures multiplied by it.

Yes. Part-time workers have the right not to be treated less favourably than comparable full-time workers. That includes the same hourly rate and a pro-rata share of holiday and other benefits. That’s why the hourly rate here is the same as the full-time one.

From 1 April 2026 the National Living Wage for workers aged 21 and over is £12.71 an hour. It’s £10.85 for 18 to 20 year olds, and £8.00 for under-18s and for apprentices under 19 or in the first year of their apprenticeship. The calculator compares your hourly rate with the rate for your age band and says plainly if it’s below. The check uses your basic pay for the hours you work, with any holiday pay on top.

It doesn’t cover overtime, shift patterns or premiums, or pay that changes during the year. When you count in days it assumes your days are as long as a full-time day. It doesn’t work out sick pay, tax or pension contributions; the PAYE calculator shows take-home pay. The 12.07% rules for irregular hours apply in Great Britain: Northern Ireland’s rules differ, so check nidirect if you work there.