Free Pro-Rata Annual Leave Calculator

Work out holiday entitlement for new starters, leavers, and part-time hours — free, no sign-up, nothing leaves your browser.

28.0 days
pro-rata annual leave entitlement
7:30
suggested hours per working day

UK statutory minimum is 5.6 weeks (28 days for a 5-day week), which can include bank holidays depending on your contract. This uses precise day-counting, which ACAS recommends — some employers instead round pro-rata amounts to whole months, which can give a slightly different figure. Always check your contract or HR team for the exact method your employer uses.

Accrual vs. allocation — a distinction worth knowing

Some employers give the full year's leave entitlement upfront on day one, while others treat it as something you build up gradually as you work through the year — accruing a portion of your annual entitlement with each pay period rather than having the whole amount available immediately. This matters most for someone who leaves partway through a leave year: if leave was allocated upfront and you've taken more than you'd accrued by your leaving date, that can be deducted from your final pay, whereas if it accrued gradually, you'd simply be paid out for whatever you'd built up but not used. Which approach applies to you is set by your employer and contract, not something this calculator can determine — it's worth knowing the distinction exists if a final leave calculation around a resignation looks different from what you expected.

Frequently asked questions

Why does my employer's number differ slightly from this one?

Some employers round pro-rata leave to whole months (rounded up) rather than counting exact days, which can give a slightly different result than the precise day-based method used here. Both are commonly used — check your contract or ask HR which method applies to you.

What if I'm both a new starter and leaving this same leave year?

Tick both boxes and enter both dates — the calculator works out the exact days between them within the current leave year.

How does "hours per working day" help with a 4-day week?

If you're reducing to fewer days without reducing your total hours, this splits your weekly hours evenly across however many days you work — useful for working out a compressed schedule, like 37.5 hours over 4 days instead of 5.

Is this legal advice?

No — this is a general calculation tool based on standard UK formulas, not a substitute for advice from ACAS, your HR team, or a solicitor for your specific situation.

Is my data sent anywhere?

No. Everything is calculated locally in your browser — nothing you enter is sent to a server.