Prorated leave calculator
Prorated leave is the full allowance × (time employed ÷ leave year) × (weekly hours ÷ full-time hours). Someone who joins with seven months of a 12-month leave year left, on a 20-day allowance, gets 11.67 days. Work three days a week as well and it drops again.
Fill in every field to see the result.
How to use it
Step 1
Enter the full-time, full-year allowance in days.
Step 2
Enter the time the person is employed in this leave year and the length of the year, in the same unit. Months work fine (7 of 12). Days are more exact (214 of 365).
Step 3
Enter their contracted weekly hours and a full-time week. For a full-timer, type the same number in both boxes.
Step 4
Read the exact figure, then use whichever rounding your policy sets. You'll see the nearest half day and the next half day up.
Questions people ask
How do I prorate leave for someone who joins mid-year?
Multiply the full allowance by the share of the leave year they'll be employed. A 20-day allowance for a starter with seven months left is 20 × 7 ÷ 12, which is 11.67 days. Most policies then round that to a half or whole day.
How is annual leave prorated for part-time staff?
Multiply the allowance by their hours as a share of a full-time week. Someone on 24 hours where full time is 40 gets 60% of the allowance. A part-timer who also joins mid-year gets both reductions, one after the other.
Should prorated leave be rounded up or down?
Your policy decides, and it should say so in writing. Rounding up to the next half day is common because it never leaves anyone short. Whatever rule you choose, apply it the same way so two people on the same contract get the same days.