Holiday Pay Calculation UK 2026: Variable Hours, Zero-Hours and the 52-Week Reference Period

What the law says: your statutory minimum

Every worker in the UK — full-time, part-time, zero-hours, agency, casual — is entitled to 5.6 weeks' paid annual leave under the Working Time Regulations 1998. For someone working a standard five-day week, 5.6 weeks equals 28 days per year.

Your contract may give you more than 5.6 weeks (many employers offer 25–30 days), but it cannot give you less.

The bank holiday question

One of the most misunderstood points in employment law: you have no automatic legal right to paid bank holidays on top of your 5.6 weeks. The 5.6 weeks is the total — your employer can structure it as:

• 20 days' standard leave + 8 bank holidays = 28 days total (common practice), or
• 28 days all-inclusive, meaning bank holidays must be taken from your allowance.

Check your contract carefully. England and Wales have 8 public holidays per year; Scotland has 9; Northern Ireland has 10. If your employer's policy says "28 days including bank holidays," you have 20 days to book freely.

The 52-week reference period (Workers Act 2018 change)

Before April 2020, holiday pay for variable-hours workers was calculated using a 12-week average. This was changed following the Good Work Plan recommendations. From 6 April 2020, the reference period is 52 weeks.

How it works

When a worker with variable hours takes a week's holiday, their holiday pay is calculated as the average weekly pay over the 52 weeks immediately before the holiday begins.

Key rules:

• Only paid weeks count. If a week had zero pay (e.g. unpaid absence), skip it and look back further — up to a maximum of 104 weeks to find 52 paid weeks.
• "Weekly pay" includes: basic pay, regular overtime (compulsory and sufficiently regular voluntary overtime, per Bear Scotland 2014), regular commissions, and certain allowances.
• It does not include one-off bonuses, non-regular payments, or expenses.

Why the change matters

Under the old 12-week rule, a seasonal worker with a very busy patch immediately before their holiday would receive artificially high holiday pay. Conversely, someone taking leave right after a quiet period received less. The 52-week average irons out seasonal fluctuations and is fairer to both worker and employer.

Worked example 1: weekly-paid worker at fixed hours

Sophie works 37.5 hours/week as a warehouse operative, earning £600/week gross. She has a 5-day week and her employer gives her 28 days (5.6 weeks) including bank holidays.

Holiday entitlement:

• 5.6 × £600 = £3,360 total holiday pay per year
• Per week of holiday taken: £600

Her pay is fixed, so the 52-week average is simply her weekly rate. Simple.

After tax (for reference):

• Annual gross: £31,200
• Income tax: £3,726 (20% on £18,630 above PA)
• Employee NI: £1,490 (8% on £18,630)
• Net annual: £25,984 (~£2,165/month)

Use our take-home pay calculator to see your own net figure.

Worked example 2: hourly-paid worker at NLW rate

Marcus is 24 and works variable hours in hospitality, typically between 20 and 40 hours per week, always at the NLW rate of £12.71/hour from April 2026.

Step 1: Calculate his average weekly pay over 52 weeks

Suppose his total earnings over the 52 weeks before his holiday were £25,000.

Average weekly pay = £25,000 ÷ 52 = £480.77/week

Step 2: Holiday entitlement in weeks

Marcus is entitled to 5.6 weeks.

Total holiday pay = 5.6 × £480.77 = £2,692.31 per year

Alternative check using hourly rate

If Marcus works an average of 40 hours per week:

• 40 hours × £12.71 × 5.6 weeks = £2,847.44/year in holiday pay

This slightly higher figure reflects the NLW floor — in any week Marcus worked 40 hours, the minimum was £12.71 × 40 = £508.40.

Worked example 3: the 12.07% accrual method for irregular workers

The 12.07% method is commonly used for workers who have no set hours, such as casual workers paid by the shift.

Where 12.07% comes from:

• Statutory entitlement: 5.6 weeks out of 52 weeks total = 10.77% of total working time
• As a proportion of working time only (52 − 5.6 = 46.4 working weeks): 5.6 ÷ 46.4 = 12.07%

Application: Priya, a casual events worker

• January to March 2026: earned £4,200 total
• Holiday accrued: £4,200 × 12.07% = £507.34

Important caveat: HMRC and employment tribunals have moved away from the 12.07% method as the primary approach since the 52-week averaging rule came in. It remains useful as a quick estimate and for workers on very short engagements, but the 52-week average is the legally robust method where 52 weeks of data exist.

Zero-hours contracts and holiday pay

Zero-hours workers are entitled to exactly the same statutory holiday as any other worker — 5.6 weeks per year. Common myths:

Key point from Harpur Trust v Brazel (Supreme Court, 2022): The Court confirmed that part-year workers (including zero-hours and term-time workers) should not have their 5.6 weeks pro-rated by the number of weeks actually worked. The 52-week average already adjusts pay downward for irregular workers — but the entitlement remains the full 5.6 weeks.

Part-time workers and proportional entitlement

While the weeks of entitlement (5.6) cannot be reduced, for fixed-hours part-timers the daily entitlement is calculated proportionally:

Part-time workers must receive no less favourable treatment than comparable full-time workers on a pro-rata basis — Part-Time Workers (Prevention of Less Favourable Treatment) Regulations 2000.

Agency workers

Agency workers gain the same holiday entitlement as direct employees from day one of their assignment. However, it is the agency (not the end client) that is typically responsible for paying holiday pay. After 12 weeks in the same role, agency workers gain equal-pay rights under the Agency Workers Regulations 2010.

What regular overtime and commission must be included

Following the landmark Bear Scotland v Fulton case (2014) and subsequent cases, regular overtime must be included in holiday pay. This applies to:

• Compulsory overtime (contracted hours you must work if asked)
• Sufficiently regular voluntary overtime — if you've consistently worked it over the 52-week period, it's included
• Commission that forms part of normal remuneration
• Allowances that are intrinsically linked to the performance of tasks (e.g. shift premium for regular shift patterns)

What is not included:

• One-off or genuinely occasional overtime
• Purely discretionary bonuses
• Expenses

Failing to include regular overtime is one of the most common sources of holiday pay underpayment claims.

What to do if you think your holiday pay is wrong

1. Ask for a written calculation — your employer must be able to explain how your holiday pay was calculated.
2. Check your payslips — compare holiday weeks against normal pay weeks.
3. Use the ACAS early conciliation service before going to tribunal — it's free and often resolves disputes.
4. Time limits — claims for unlawful deduction of wages (which covers holiday pay) must be brought within 3 months less one day of the deduction, or the last in a series of deductions.
5. Back-pay — if there's a continuing series of underpayments, you may be able to claim backdated amounts, though claims are effectively capped at 2 years by the Deduction from Wages (Limitation) Regulations 2014.

Holiday pay summary table

Key rates for 2026/27

• National Living Wage (21+): £12.71/hour — the floor for any hourly holiday pay calculation
• National Minimum Wage (18-20): £10.85/hour
• Under 18 / Apprentice: £8.00/hour
• Personal Allowance: £12,570 — holiday pay is taxable income the same as regular pay

Frequently asked questions

Can my employer pay me in lieu of holiday? Only for holiday entitlement that exceeds the statutory 5.6 weeks — you cannot contractually waive statutory holiday, and payment in lieu during employment is unlawful for the statutory element. You can receive payment in lieu on termination for untaken statutory holiday.

What if my employment ends mid-year? You're entitled to holiday pay for any statutory leave accrued but not taken, calculated proportionally. Conversely, if you've taken more than your accrued entitlement, your employer can claw back the excess only if your contract expressly allows it.

Does paternity or maternity leave affect the 52-week calculation? Weeks on statutory parental leave count as paid weeks for the purposes of the reference period — they don't break the chain.

Try the calculator

For your full net pay including tax and NI on any salary:

Related reading:

• National Living Wage April 2026: new rates explained
• Understanding your UK payslip
• May 2026 payslip changes: what's different this year

Sources

• gov.uk: Holiday entitlement
• ACAS: Holiday pay
• Legislation.gov.uk: Working Time Regulations 1998
• Harpur Trust v Brazel [2022] UKSC 21
• Bear Scotland Ltd v Fulton [2014] UKEATS/0047/13
• Low Pay Commission: NLW rates April 2026