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The standard pro-rata method
Part-time and mid-year entitlement combines two reductions: the FTE fraction (how much of full-time the person works) and the fraction of the leave year they will actually be employed for, counting their start month as a whole month. Multiply all three together and round to the nearest half day, as most HR policies do.
Worked example
A full-time entitlement of 28 days, for someone working half-time (0.5 FTE) for the whole leave year, gives 28 × 0.5 × 12/12 = 14 days. Start that same person in month 7 of the leave year and it becomes 28 × 0.5 × 6/12 = 7 days.
What to confirm locally
Employers differ on rounding (some round up to whole days), on whether public holidays inside the entitlement are handled separately for part-timers, and on accrual in the first month. This calculator applies the widely used standard method transparently — then your own policy document has the final word.
Common questions
My leave year starts in April, not January — how do I use the month list?
Count from your leave-year start: April is month 1 of your leave year. If someone starts in October, that is month 7 of an April-start year, so choose the 7th month in the list (labelled July) to represent month 7 — only the position in the year matters to the maths.
Why is my start month counted in full?
Because that is the convention in most public-sector and HR policies — entitlement accrues in whole months, with the start month included. If your policy accrues daily, the exact unrounded figure is shown in the result so you can apply it.