There is a common misconception among employers and employees alike, that statutory holiday entitlement in the UK is 20 days per year plus bank holidays, often referred to as “four weeks plus bank holidays”. Also sometimes referred to as 28 days holiday per year, pro-rata (as there are typically 8 bank holidays per year).
This is not legally correct, and reliance on this assumption is one of the most common causes of holiday pay errors and non-compliance, particularly in hospitality, retail, care, and other sectors with non-standard working patterns.
Incorrect holiday calculations are among the most common causes of employment tribunal claims, especially in hospitality and retail. Typical risks include underpayment of statutory leave, incorrect bank holiday treatment, failure to pay casual staff holiday pay, and hidden liabilities at termination.
Unintentional errors are common and often go unnoticed until a grievance is raised or HMRC or an employment tribunal becomes involved. Potential exposure includes backdated pay (up to two years), penalties and interest, legal costs, and reputational damage.
🔑 Key: The common misconception that statutory holiday entitlement in the UK is 20 days per year plus bank holidays, often referred to as “four weeks plus bank holidays” is NOT legally correct.
The Legal Minimum Statutory Holiday Entitlement
UK law provides that almost all individuals classed as workers are entitled to a minimum of 5.6 weeks’ paid holiday per leave year, rather than a fixed number of days tied to bank holidays. This requirement is set by the UK government and applies regardless of:
- Full-time or part-time status
- Which days of the week are worked
- Whether the contract is permanent, fixed-term, or zero hours
As all UK bank holidays fall between Monday and Friday, the “20 days plus bank holidays” approach only works in practice where an individual works Monday to Friday, all year round, and is not required to work on bank holidays. In reality, this working pattern applies to only a proportion of the workforce. It is estimated that between 40% and 50% of the UK working population work at least some weekends and/or bank holidays, and part-time workers account for approximately 30%–35% of the workforce.
As a result, many workers would be disadvantaged if holiday entitlement were calculated solely by reference to bank holidays or fixed weekday patterns. Employers must therefore ensure that all workers receive an equal statutory holiday entitlement that properly reflects their working arrangements and includes an appropriate allowance for bank holiday hours, regardless of how many hours they work or which days of the week they normally work. For this reason,
🔑 Key: * The legal minimum is 5.6 weeks' paid annual leave (inclusive of bank holidays).
* For a full-time employee working five days per week all year, 5.6 weeks equates to 28 days’ paid holiday.
* For part-time or irregular-hours workers, entitlement must be calculated based on their actual working pattern.
* Any differing contractual holiday arrangement must still meet or exceed 5.6 weeks' in practice.
5.6 Weeks’ Statutory Holiday Entitlement in Practice
Statutory holiday entitlement is calculated as: 5.6 × the number of days or hours normally worked per week.
Where staff are contracted to a fixed number of hours per week, but work variable days or shifts, entitlement should be calculated in hours.
Examples (days)
- 5 days per week
→ 5 × 5.6 = 28 days - 3 days per week
→ 3 × 5.6 = 16.8 days
Example (hours)
- 15 hours per week
→ 15 × 5.6 = 84 hours
🔑 Key: Holiday entitlement should always be recorded in the same unit that the worker is contracted in (days or hours).
Bank Holidays In Practice
- If a bank holiday falls on a day the worker normally works and they take that day off, it counts as statutory leave and should be deducted from their annual holiday entitlement as a day used.
- If a bank holiday falls on a day the worker does not normally work, it cannot be counted as statutory leave and must not reduce their annual holiday entitlement.
Zero Hour, Irregular Hours, Casual, and Part-Year Workers
This is where most holiday pay compliance risk arises.
All zero hour, irregular hours, casual, and part-year workers are still legally entitled to paid annual leave based upon 5.6 weeks. The key issue is how entitlement and pay must be calculated.
For workers with genuinely irregular or variable hours, statutory holiday entitlement should be calculated as 12.07% of actual hours worked. This percentage represents 5.6 weeks of leave across a working year.
- 52 weeks − 5.6 weeks = 46.4 working weeks
- 5.6 ÷ 46.4 = 12.07%
This means:
- Every hour worked accrues 0.1207 hours of holiday
- Every £100 earned accrues £12.07 of holiday pay
This method ensures pro-rata compliance, no underpayment, and no over-accrual.
🔑 Key: For zero hour, irregular hours, casual, and part-year workers, the 12.07% method should be used to ensure pro-rata compliance and avoid underpayment.
The Statutory Cap on Holiday Entitlement
Statutory holiday entitlement is capped at 28 days per year.
If a worker regularly works six or seven days per week, the employer is still only legally required to provide 28 days of statutory leave.
🔑 Key: An employer, at their discretion, may offer additional leave above the statutory minimum. Any leave above the statutory minimum is contractual. Additional leave should be clearly documented and distinguished
A Compliance Rule of Thumb for Employers
Key principles:
- Fixed hours → use the 5.6 weeks method
- Irregular or zero hours → use the 12.07% method
- Always include bank holidays within the total
- Always itemise holiday pay clearly on payslips
Following these principles significantly reduces payroll risk. Correct holiday calculations protect both workers and employers.
Compliance Disclaimer
This article is provided for general guidance only and does not constitute legal advice. Holiday entitlement and pay calculations may vary depending on individual circumstances.
Further guidance:
https://www.citizensadvice.org.uk/
https://www.gov.uk/holiday-entitlement-rights