How to Calculate Holiday Entitlement in the UK: A Practical Guide for Employers

Working out holiday entitlement shouldn’t be a headache for employers or employees. But between full-timers, part-timers, irregular hours, and the all-important “5.6 weeks” rule, even seasoned business owners can find themselves scratching their heads. If you’re an employer in the UK, you’re legally required to give staff a minimum level of paid annual leave. Getting this right helps keep your business compliant, your team motivated, and your employment contracts watertight. But how do you calculate holiday entitlement for your specific team – and what about bank holidays, accrual, or when hours change? Don’t stress – in this guide, we’ll break down UK statutory holiday entitlement, show you how to do the maths for different employment types, and offer practical tips so you can feel confident managing annual leave in your business.

What Is Statutory Holiday Entitlement in the UK?

Let’s start at the beginning. The statutory minimum holiday entitlement for workers in the UK, as set out by the Working Time Regulations 1998, is 5.6 weeks of paid holiday per year. For someone with a standard five-day work week, that comes out to 28 days. This entitlement applies to:

• Full-time employees
• Part-time employees (on a pro-rata basis)
• Most “workers” (including some freelancers, agency staff, and zero-hour contract holders)

This is the legal minimum – you can, of course, choose to offer more as part of your company benefits or culture. But dropping below this isn’t an option; failing to comply can land your business in hot water with employment regulators.

How Do You Calculate Holiday Entitlement for Full-Time Employees?

The standard calculation for a full-time worker is straightforward. If your employee works five days per week, just multiply:

• 5 days × 5.6 weeks = 28 days’ statutory paid annual leave

It’s important to note that those 28 days can include public (bank) holidays if you choose – more on this in the next section. If your contracts provide more, that’s great – but 28 days is your baseline. If you want to see this spelled out in employment agreements, check out our template employment contract service so you’re covered from day one.

How to Work Out Holiday Entitlement for Part-Time Employees

For anyone working less than five days per week, entitlement is pro-rata – calculated according to how many days they work. The formula is:

• Number of days worked per week × 5.6 = Annual holiday entitlement (in days)

Let’s walk through some examples:

• Works 4 days per week: 4 × 5.6 = 22.4 days’ leave per year
• Works 3 days per week: 3 × 5.6 = 16.8 days
• Works 2 days per week: 2 × 5.6 = 11.2 days
• Works 1 day per week: 1 × 5.6 = 5.6 days

Not sure how to round your numbers? Most employers round up to the nearest half or whole day (never down – as this would breach your statutory obligations). Always explain your approach to staff in your holiday policy or contract to avoid confusion. Want to know more about what to include in your contracts? Our detailed guide to calculating holiday entitlement has further breakdowns and a handy calculator for reference.

How Does Holiday Entitlement Work for Irregular Hours or Zero-Hour Contracts?

It’s common for businesses – especially in hospitality, retail, or agency work – to have employees whose hours change week to week. In these cases, holiday leave needs to accrue based on how much the person actually works across the leave year. The standard way to do this? Use the hours worked × 12.07% rule.

• Multiply the total hours worked by 12.07% to find the equivalent paid holiday hours accrued.

Why 12.07%? If a full-time worker gets 5.6 weeks' holiday out of 52 weeks, then their holiday entitlement as a percentage of hours they actually work is: 5.6 ÷ (52 - 5.6) = 0.1207, or 12.07%

Example: Calculating Holiday Accrual by Hours Worked

• Your employee works 30 hours in a given month.
• Multiply 30 × 12.07% = 3.62 hours of paid holiday accrued.

Do this monthly and keep a clear log so everyone knows how much leave has been “banked”. For an in-depth explanation and more worked examples, check our article on how to calculate holiday entitlement for variable hours workers.

What About Public (Bank) Holidays – Are They Extra?

This is a common point of confusion for employers and employees. Here’s the deal:

• Employers can choose whether public (bank) holidays are included within the statutory minimum, or offered in addition.
• If you include them in the 28 days and an employee works a public holiday, you must allow them a substitute day off.
• If you offer public holidays in addition to the 28 days, you’re providing more than the legal requirement (but this can be a great staff perk).

Set this out very clearly in your employment contracts or staff handbook, so there’s no uncertainty. For guidance on policies and contract drafting, it’s wise to refer to our staff handbook and workplace policy resources.

Do You Need to Pay Staff Their Normal Pay During Holidays?

Yes – and this is non-negotiable under UK law. Staff must receive their normal week's pay while taking statutory annual leave. For workers with set hours and pay, this is easy to calculate. For staff with variable pay (commission, piece rates, fluctuating hours), you’ll need to calculate average pay across the previous 52 weeks worked. For more on this, and the difference between “holiday pay” and “basic pay”, see our guide to paying employee commission.

How Does Holiday Entitlement Accrue During Other Types of Leave?

It’s important to remember that employees continue to accrue statutory annual leave even when they’re on other types of statutory leave, including:

• Maternity leave
• Paternity, adoption, or shared parental leave
• Sick leave

They must be allowed to take this accrued holiday either during or after their statutory leave, sometimes carrying it over to the next leave year if required by law or the contract. Make sure your policies don’t prevent this – it’s a common compliance slip-up for employers, and a potential source of disputes.

What Happens to Unused Holiday?

Ideally, all employees should use up their holiday leave in the correct “leave year” (defined in your contract or company holiday policy). But what about those inevitable occasions when staff haven’t taken it all?

• By default, unused holiday can’t be carried over – unless your contract specifies this, or the person was unable to take it (e.g., due to sickness or statutory leave).
• You can allow carry-over of some or all entitlement by stating this clearly in their contract or your staff handbook.
• When someone leaves your business (for any reason), you must pay them for any accrued but unused entitlement – this is called payment in lieu of holiday.

This helps avoid disputes and is a good reason to include clear annual leave clauses in all your employment documents. Get further information about managing end-of-employment and accrued holiday in our in-depth guides.

Sample Holiday Entitlement Calculation Table

Here’s a quick reference holiday calculation table to help you check entitlement at a glance.

Days Worked Per Week	Annual Leave Entitlement (5.6 weeks)
5	28 days
4	22.4 days
3	16.8 days
2	11.2 days
1	5.6 days

Common FAQs About Holiday Entitlement in the UK

• How is annual leave calculated for term-time or irregular workers? Keep a tally of hours worked and apply the 12.07% formula to those hours – this gives their accrued entitlement.
• Can I round holiday entitlement up or down? Always round up to avoid offering less than the statutory minimum. You can offer more, but never less.
• What if I want to give extra leave? You can always offer more than the legal minimum. Just make sure your policy is clear and consistent for all employees in similar roles.
• Does statutory leave change for long service? Only if you wish – the law does not require it, but you may introduce additional entitlement as a benefit.

Best Practices: Policies, Contracts, and Communication

Legal compliance is the foundation here, but your holiday policy and processes are where the real clarity and business benefits happen. Here are some practical tips:

• Always set out your holiday policy in writing (ideally in both the employment contract and a standalone staff handbook).
• Be explicit about public holidays: are they included in the entitlement or offered in addition to it? Do staff need to work these days, and what substitution will they receive?
• Explain how accrued holiday is handled on variable hours or during periods of parental/sick leave.
• Log and communicate holiday balance to every employee regularly. Nothing breeds disputes faster than staff feeling unsure about what they’ve accrued.
• Have a robust process for requesting, approving, or refusing holiday (but beware, you can’t stop employees from taking their legal minimum).
• Specify what happens at the end of employment: spell out the process for payment in lieu of unused holiday in your contract or policy.

We can help you draft policies, review your existing approach, or prepare custom contracts tailored to your business. Don’t leave clarity to chance – written, clear policies keep everyone protected.

Legal Requirements and Key Legislation

The core rules on holiday entitlement come from the Working Time Regulations 1998. Your responsibilities are enforced by HMRC and the Employment Tribunal system. Key compliance points:

• Never provide less than the statutory minimum entitlement.
• Keep clear records of leave accrual, use, and balance for all staff.
• Ensure annual leave continues to accrue during statutory leave.
• Pay staff correctly for leave taken, based on average pay if hours/pay are variable.

Non-compliance can lead to disputes, lost staff, and penalties. For further reading, browse our guide to parental leave rights and our employer liability overview.

Key Takeaways

• The basic statutory annual leave in the UK is 5.6 weeks (28 days) for a full-time (five-day week) employee.
• Calculate part-time entitlement using days worked per week × 5.6.
• For irregular hours/zero-hours, accrue holiday at 12.07% of hours worked.
• Employers can choose to include public holidays – just be clear in your policies.
• Holiday entitlement continues to accrue during statutory absences like maternity or sick leave.
• Unused holiday is paid in lieu on termination, and may be carried over if your policy/contract allows.
• Clearly written contracts and a transparent holiday policy are the best way to avoid costly disputes.

Calculating and managing holiday entitlement isn’t just a box-ticking exercise – it’s essential for staff retention, smooth business ops, and staying firmly on the right side of employment law. The good news? With the right contracts and a bit of smart planning, you’ll make it simple for both you and your team. If you have questions about calculating holiday entitlement for your workforce, want help drafting staff policies, or need advice on compliance, reach out to us at team@sprintlaw.co.uk or call 08081347754 for a free, no-obligations chat.