Holiday entitlement calculator

Part-time staff

Part-time staff are entitled to the same holiday as full-time staff, in proportion to the days they work. Multiply the full-time allowance by the days they work, then divide by the days in a full-time week:

Full-time allowance × days worked ÷ full-time days

Someone working 3 days a week, where full-time staff get 28 days: 28 × 3 ÷ 5 = 16.8 days. You can't round statutory holiday down, so this calculator rounds up to the nearest half day: 17 days.

Pro-rate the whole allowance, bank holidays included, then let staff book the bank holidays that land on their working days. Giving part-timers "whichever bank holidays fall on their days" short-changes anyone who doesn't work Mondays, since most bank holidays are Mondays.

Starting or leaving part-way through the year

For someone who works only part of the leave year, take their full-year figure and multiply it by the months they work out of 12. Every month they work any part of counts as a whole month, and the result is rounded up to the nearest half day. This matches how UK law builds up leave in someone's first year: one-twelfth for each month.

Someone full-time on 28 days, starting on 15 June with a January leave year, works June to December: 28 × 7 ÷ 12 = 16.3, so 16.5 days.

For a leaver, the law sets what they're owed as a share of the leave year that's gone by. Counting whole months is the generous way to work that out; some employers count days instead. Whichever you use, take off the days they've already taken, and pay any remaining holiday in their final pay.

The statutory minimum

Almost every UK worker is entitled to 5.6 weeks' paid holiday a year: 28 days for someone working five days a week, capped at 28 however many days they work. Employers may count bank holidays towards it. The calculator warns you if your figure comes out below it.

Irregular hours and part-year workers

For leave years starting on or after 1 April 2024, staff with irregular hours, or who work only part of the year, build up holiday at 12.07% of the hours they work each pay period instead. This calculator is for staff with regular working days. See gov.uk's guidance for the irregular-hours rules.