Holiday Accrual Calculator

Private by design: this tool runs entirely in your browser. Nothing you type is sent to or stored on our servers.

What do you want to work out?

How this works — the law behind it

Almost all workers are entitled to 5.6 weeks' paid holiday a year (Working Time Regulations 1998, regs 13 and 13A), pro-rated for part-time work and capped at 28 days for the statutory minimum.

Irregular-hours and part-year workers

For leave years starting on or after 1 April 2024, the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023 put the familiar 12.07% method on a statutory footing: holiday accrues at 12.07% of hours worked in each pay period (12.07% = 5.6 ÷ 46.4, the working weeks left after holiday).

Rolled-up holiday pay

For irregular-hours and part-year workers only, employers may pay a 12.07% uplift with each payslip instead of paying when leave is taken. It must be itemised separately on the payslip — if you can't see it as its own line, query it. You should still be enabled to actually take time off.

Leavers

When you leave part-way through a leave year you are entitled to payment in lieu of accrued-but-untaken statutory holiday (WTR reg 14): entitlement × fraction of the leave year worked, minus days taken.

Guidance, not advice. This tool gives general guidance based on the law and statutory guidance in force at the last review date. It is not legal advice and does not replace your organisation's policies or professional advice on your specific circumstances.

Last reviewed: 1 July 2026 · Report an error in this tool