There are alternative ways of working out the holiday entitlement for workers who don't have regular working arrangements or patterns.
Paid holiday entitlement is calculated pro-rata for part-time workers.
So if a member of staff works three days a week, they are entitled to 16.8 days (5.6 x 3).
It is sometimes easier to calculate holiday entitlement as shifts.
So if a member of staff works four 12-hour shifts followed by four days off, the average working week is 3.5 12-hour shifts. So 5.6 weeks' holiday is 5.6 x 3.5 = 19.6 12-hour shifts.
For other shift patterns, it may be easiest to calculate according to the established repeating pattern.
More irregular working patterns: calculating holiday in hours
If a member of staff works annualised hours, you need to calculate how many hours a week they work on average over the whole year.
So if a member of staff works a total of 1,600 hours a year, or 34.48 hours a week over 46.4 weeks of the year, the holiday entitlement is 5.6 weeks x 34.48 hours a week = 193.09 hours' holiday for the year.
For someone working compressed hours, for example, a 36-hour week over four days instead of five, their annual holiday entitlement is 36 hours x 5.6 weeks = 201.6 hours holiday for the year.
Rather than taking a day's holiday, they would take the number of hours that they would have otherwise worked on that day (ie for 36 hours worked over four days, they would take nine hours' holiday for each day otherwise worked).
Calculating no fixed hours contracts (casual work, including zero-hours contracts)
To calculate average hourly rate, only the hours worked and how much was paid for them should be counted. Take the average rate over the last 12 weeks.
A 'week' usually runs from Sunday to Saturday. Only use another 7-day period (like Thursday to Wednesday) if that's how a worker's pay is calculated. See calculating holiday pay for workers without fixed hours or pay. You can also get further advice from the Acas Helpline Tel 0300 123 1100.
Calculations may result in part days, eg 22.4 days for someone working four days a week. In some cases it may be easier to work the holidays out in hours.
If this is the case, you could:
- Allow the worker to leave early or arrive late one day. For example, for someone working an eight-hour day taking 0.4 of a day's holiday, you could allow them to leave after working for four hours and 48 minutes (480 minutes x 0.6 of a working day = 288 minutes) or allow them to arrive three hours and 12 minutes late (0.4 of a working day).
- Round the entitlement up to the nearest full day - or half day if this is still easy for you to administer. You cannot round entitlements down.
- Allow the worker to carry the part day over into the next leave year (and then perhaps round up to the nearest full day).
- Pay them for a part day. However, you can only do this if the worker's paid holiday entitlement is more than 5.6 weeks as you cannot pay a worker in lieu of untaken statutory holiday - see calculating and paying holiday pay.