Do Zero-Hours Workers Get Paid Holiday in the UK?

TimeClock 365 is used by a lot of UK employers who run flexible, casual, or bank staff on zero-hours contracts - and a common assumption still trips people up: that because there are no guaranteed hours, there is no real holiday entitlement either. That is wrong, and it is an expensive assumption if a worker later brings a claim. Every worker on a zero-hours contract is legally entitled to paid annual leave under the Working Time Regulations 1998, on exactly the same statutory basis as a full-time employee - 5.6 weeks a year. The only thing that changes is the method used to work out what that leave is worth in pounds and hours, because there is no fixed working week to measure it against.

This guide covers how holiday accrues for zero-hours and casual workers, when rolled-up holiday pay can legally be used, and the record-keeping mistakes that create the most risk.

How Holiday Entitlement Accrues for Zero-Hours Workers

For workers with genuinely variable hours, entitlement is worked out as a percentage of hours actually worked rather than as a fixed number of days per year. The standard method is the 12.07% accrual rate: 5.6 weeks of statutory leave divided by the 46.4 weeks left in the year once that leave is taken out, giving 12.07% of hours worked. In practice, that means for every hour a zero-hours worker works, they build up roughly 7.2 minutes of paid leave.

This applies specifically to workers who fall into the legal categories created by the 2024 reforms to the Working Time Regulations: irregular hours workers (hours that are, under the contract, wholly or mostly variable from pay period to pay period) and part-year workers (contracted to work only part of the year, with unpaid gaps of at least a week). Most zero-hours and casual staff fall into the first category, and some seasonal or term-time zero-hours arrangements fall into the second.

Rolled-Up Holiday Pay: When It's Legal

For years, rolled-up holiday pay - paying an uplift on top of every hour worked instead of paying separately when leave is taken - sat in a legal grey area after the Court of Appeal's ruling in Harpur Trust v Brazel. The Employment Rights Act reforms that took effect for leave years starting on or after 1 April 2024 settled the question specifically for irregular hours and part-year workers: rolled-up holiday pay is lawful for this group, provided three conditions are met.

The three conditions for lawful rolled-up holiday pay

  • The uplift must be calculated at a minimum of 12.07% of the worker's total pay for the pay period, reflecting the statutory 5.6-week entitlement.
  • The holiday pay amount must be itemised separately on the payslip - it cannot simply be folded into a higher hourly rate with no breakdown.
  • It must be paid at the same time as the pay it relates to, not held back or paid in a separate lump sum.

Rolled-up holiday pay is not available for workers with regular, fixed hours - only for those who genuinely qualify as irregular hours or part-year workers under the statutory definitions. Applying it to the wrong group of staff is itself a compliance breach, not a shortcut.

Where Employers Get This Wrong

The most common failure is not malicious - it is a spreadsheet or manual process that cannot keep up with genuinely variable shift patterns. Three mistakes recur most often:

  • Treating "zero-hours" as "no entitlement." Contract type does not remove statutory rights. Any zero-hours worker with an ongoing worker or employment relationship accrues leave from day one.
  • Applying rolled-up pay without itemising it. If the payslip doesn't show the holiday pay component separately, the arrangement is not compliant even if the percentage used is correct.
  • Losing track of hours across multiple short assignments. Casual and bank workers often pick up shifts across different periods with gaps in between - if hours worked aren't captured accurately shift by shift, the 12.07% calculation is only ever an estimate, and estimates are what tribunals pick apart.

Because entitlement is driven directly by hours actually worked, accurate time and attendance data is not a nice-to-have here - it's the input the whole calculation depends on. Employers managing this manually for a large casual workforce are effectively running payroll-grade calculations off incomplete data. Structured leave management that ties accrual to logged hours, alongside a clear HR compliance record trail, removes the guesswork and the underpayment risk that comes with it.

Frequently Asked Questions

Are zero-hours workers entitled to paid holiday in the UK?

Yes. Zero-hours workers have the same statutory right to 5.6 weeks of paid annual leave per year as any other worker under the Working Time Regulations 1998. The contract type does not remove this right; only the calculation method differs because there are no fixed weekly hours to measure leave against.

What is the 12.07% rule for holiday pay?

It is the standard method for calculating holiday accrual for workers with irregular or variable hours. It comes from dividing the statutory 5.6 weeks of leave by the 46.4 remaining working weeks in a year, giving 12.07% of hours worked as the accrual rate for paid leave.

Is rolled-up holiday pay legal in the UK?

Yes, for irregular hours and part-year workers, as of leave years starting on or after 1 April 2024. It must be calculated at a minimum of 12.07% of total pay, shown separately on the payslip, and paid at the same time as the wages it relates to. It is not permitted for workers with regular, fixed hours.

How is holiday pay calculated for a zero-hours worker who doesn't use rolled-up pay?

Where rolled-up pay isn't used, holiday pay is based on a 52-week average of the worker's actual pay, looking back at weeks in which they were paid (excluding unpaid weeks, going back up to 104 weeks if needed to find 52 paid weeks).

Can an employer refuse to let a zero-hours worker take holiday?

No. Zero-hours workers can request and take statutory leave the same as any other worker, subject to the same notice requirements that apply to other staff. Employers cannot use the absence of guaranteed hours as a reason to deny statutory leave.

What records must an employer keep for zero-hours holiday pay?

Employers need accurate records of hours worked per pay period, any rolled-up holiday pay paid and itemised on payslips, and leave accrued, taken, and carried over. From April 2026, record-keeping requirements around leave accrual and usage have become more detailed, making manual tracking increasingly risky for employers with a large casual or zero-hours workforce.

This article is general information for UK employers and does not constitute legal advice. Holiday pay calculations can be affected by individual contract terms and case-specific facts. For guidance on a specific situation, contact Acas or a qualified employment solicitor.