Holiday pay on redundancy
The basic calculation
Statutory leave is 5.6 weeks per year (28 days for a 5-day worker, including the 8 bank holidays). The formula on termination is set out in WTR 1998 reg.14. Accrual is daily on a pro-rata basis.
Worked example: leave year runs April to March, you leave on 31 August, 4 months into the leave year. Statutory entitlement 5.6 weeks pro-rata = 1.87 weeks. If you took 5 days, the employer owes 1.87 weeks minus the 5 days, payable at your normal week's pay.
Variable hours: the 52-week reference
For workers without fixed hours, a week's pay is the average of the last 52 paid weeks (skipping any unpaid weeks). This is the post-Harpur Trust position confirmed in ACAS guidance: holiday pay when leaving a job.
Tax treatment
Holiday pay on termination is taxed in full as employment income. It is NOT covered by the £30,000 termination-payment exemption in ITEPA 2003 s.401, because it is earnings you would have received anyway. Income tax and employee NICs apply at the usual rates.