Holiday pay calculator
For irregular-hours and part-year workers, in leave years starting on or after 1 April 2024, multiply hours worked by 12.07% to get accrued holiday hours, or apply 12.07% to gross pay for rolled-up holiday pay. This calculator does both and shows a worked example.
| Gross pay for the period | £1125.00 |
| Accrued holiday hours (12.07%, before rounding) | 4.53 hrs |
| Statutory accrual, rounded to the nearest hour, reg 15B(5) | 5 hrs |
| Holiday pay accrued this period | £135.79 |
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How this is calculated
The 12.07% accrual applies to irregular-hours and part-year workers, for leave years starting on or after 1 April 2024 (Working Time Regulations 1998, regulation 15B). Regular-hours workers get 5.6 weeks' leave per leave year instead.
The 12.07% figure comes from the statutory 5.6 weeks' leave a year, divided by the 46.4 weeks actually worked (52 weeks minus 5.6 weeks' leave = 46.4). An irregular-hours or part-year worker accrues 12.07% of the hours they work in each pay period, on the last day of that pay period. They cannot accrue more than 28 days of leave in a leave year (regulation 15B(4)).
Accrued banks that 12.07% as hours and pay in a running balance, drawn down when the worker actually takes leave. Rolled-up holiday pay pays the 12.07% out with each payslip instead, itemised as a separate amount, and the worker takes unpaid leave when they're off.
Rolled-up holiday pay is only lawful for irregular-hours and part-year workers, and only for leave years starting on or after 1 April 2024 (regulation 16A, inserted by the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023). It must be shown as a separate item on the payslip, not folded into the hourly rate.
Worked example. A contractor works 37.5 hours at £30.00 an hour: £1,125.00 gross. Accrued holiday: 37.5 × 12.07% = 4.53 hours before rounding. Regulation 15B(5) treats a fraction of an hour under 30 minutes as zero and one of 30 minutes or more as a whole hour, so the 0.53 of an hour (about 32 minutes) rounds up and the statutory accrual is 5 hours. Holiday pay: £1,125.00 × 12.07% = £135.79, either banked (accrued) or paid with this payslip (rolled-up).
Sources
- legislation.gov.uk: Working Time Regulations 1998, regulation 15B, irregular hours and part-year workers' annual leave (checked 27 September 2026)
- legislation.gov.uk: Working Time Regulations 1998, regulation 16A, rolled-up holiday pay (checked 27 September 2026)
- legislation.gov.uk: The Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023, SI 2023/1426, made 19 December 2023 (checked 27 September 2026)
- gov.uk: Holiday pay and entitlement reforms from 1 January 2024
- gov.uk: Calculate leave entitlement
- gov.uk: Holiday pay
This tool is an illustration, not advice. Check your figures against the sources above, or ask your accountant, before relying on them.