Calculating holiday entitlement is one of the most common compliance challenges UK employers face, particularly when managing full-time, part-time, variable-hours, and zero-hours workers under the same payroll.
In this article, we’ll guide you through how to work out holiday entitlement and pay. We will also look at the benefits of using a holiday entitlement calculator and HR software to digitise and simplify the process.
Table of Contents
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- What Is Statutory Holiday Entitlement in the UK?
- Holiday Entitlement: Key Rules at a Glance
- How Is Statutory Holiday Entitlement Calculated Per Month?
- Exceptions to Paid Holiday Entitlement
- Factorial’s Time Off Tracker
- Holiday Pay Entitlement
- How is Holiday Pay Calculated?
- What Is Rolled-Up Holiday Pay – and When Is It Lawful?
- Overtime Pay and Laws in the UK
- How Can HR Software Help With Calculating Holiday Pay?
Key Facts: Holiday Entitlement in the UK
- Almost all UK workers are legally entitled to 5.6 weeks (28 days for a standard five-day week) of paid annual leave per year under the Working Time Regulations 1998, as confirmed by GOV.UK.
- The statutory 28-day entitlement is capped at 28 days regardless of how many days per week a worker works. Even a six-day-a-week worker receives no more than 28 statutory days, according to Acas.
- From 6 April 2026, the Employment Rights Act 2025 introduced a mandatory record-keeping obligation for all UK employers: holiday records must be retained for at least six years, and failure to comply is a criminal offence, as confirmed by Acas.
- For irregular-hours and part-year workers, holiday entitlement now accrues at 12.07% of hours worked per pay period – a method confirmed as lawful for leave years starting on or after 1 April 2024 under the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023.
What Is Statutory Holiday Entitlement in the UK?
Statutory holiday entitlement is the minimum amount of paid annual leave most employees are legally entitled to in the UK. Understanding how it works can help both employers and employees know how much holiday is available and what rules apply.
Holiday Entitlement: Key Rules at a Glance
| Worker Type | Entitlement Method | Holiday Pay Basis |
|---|---|---|
| Full-time (fixed hours, 5 days/week) | 28 days (5.6 weeks) | Normal weekly pay (same as regular week) |
| Part-time (fixed hours) | Days worked per week × 5.6 (max 28 days) | Normal weekly pay, pro-rated |
| Irregular-hours/zero-hours (from 1 April 2024) | 12.07% of hours worked per pay period | 52-week average earnings (or rolled-up at 12.07%) |
| Part-year workers (from 1 April 2024) | 12.07% of hours worked per pay period | 52-week average earnings (or rolled-up at 12.07%) |
| Workers on sick leave/maternity leave | Continued accrual throughout leave | Carry-over rules apply (max 4 weeks on sick leave, within 18 months) |
According to the CIPD, the average UK employee receives 33.5 days of total leave including bank holidays – significantly above the 28-day statutory minimum. This means most employers already offer enhanced contractual entitlement, making accurate tracking of both statutory and contractual leave essential for payroll compliance.
How Much Holiday Is Each Worker Entitled to Per Year?
Almost all UK workers are legally entitled to 5.6 weeks of paid annual leave per year – equivalent to 28 days for a standard five-day week – under the Working Time Regulations 1998, as confirmed by GOV.UK. This statutory minimum applies to full-time workers, part-time workers, agency workers, zero-hours workers, and irregular-hours workers. The 28-day figure is also the statutory cap. Even workers who work six or seven days per week are entitled to no more than 28 days, as confirmed by Acas.
Employers can include the total of UK bank holidays (or ‘public holidays’) within their minimum holiday entitlement – this is up to the employer and should be stated in an employee’s contract. The total amount is usually eight bank holidays, although additional days can be added for unique occasions.
These rights derive from the Working Time Regulations 1998, which implemented the EU Working Time Directive into UK law. Entitlement accrues from the first day of employment, regardless of how long a worker has been with the company, as confirmed by GOV.UK.
What is Pro-Rata Holiday Entitlement?
Pro-rata holiday entitlement is determined by calculating an employee’s annual leave based on their length of service within the holiday year.
For full-time employees working five days a week, the statutory minimum is 28 days’ paid annual leave per year, equivalent to 5.6 weeks of holiday. Part-time workers who consistently work the same number of hours each day, Monday to Friday, are also entitled to 5.6 weeks’ holiday. However, their entitlement is proportionately less than 28 days due to their reduced weekly hours.
Zero-hours workers have the same annual leave allowance as full- and part-time employees, which is 5.6 weeks per year. However, given the nature of their contracts, where hours can vary significantly from week to week (e.g., 12 hours one week, 20 hours the next, and no hours in subsequent weeks), it is more practical to calculate their entitlement in hours rather than days.
To determine the days of holiday they should take, an average of the hours worked over the preceding 12 weeks should be calculated. If there were any weeks where no work was performed, and no pay was received, those weeks should be substituted with the most recent previous weeks where work was performed, and payment was received.
For leave years starting on or after 1 April 2024, the rules for irregular-hours and part-year workers changed significantly. Under the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023, holiday entitlement for these workers now accrues at 12.07% of hours worked in each pay period, rather than as a fixed proportion of an annual total. This percentage is derived by dividing 5.6 weeks by the 46.4 remaining working weeks in the year (52 minus 5.6). The CIPD confirms that this reform was introduced to give employers a lawful, proportionate method of calculating leave for workers whose hours vary significantly from period to period.
How Is Statutory Holiday Entitlement Calculated Per Month?
You can manually work out how much annual leave an employee is owed with a simple formula.
Imagine your company’s holiday policy grants employees 28 days of holiday and the employee joins on 1 January. To calculate their work-free days, you must divide the employee’s 28 days of holiday by 12 months. This gives you a total of 2.3 days off per month. Therefore, as the employee started in January, they will be working 12 months this year. This means the employee will have a total of 28 days of holiday at their disposal.
Using Factorial to manage the holidays means that your employees’ holidays are calculated automatically. When you enter the employee’s data into Factorial, our all-in-one software calculates the number of days available for that worker based on the day they started working for the company.
Bank Holiday Entitlement
Workers are not legally entitled not to work on bank holidays. Employers have the authority to determine whether they can work on such days. They can be part of standard holiday entitlement or offered separately as an additional benefit, as long as this is clearly stated in the employment contract alongside whether there is extra compensation for working on bank holidays.
Part-time workers are entitled to the same number of bank holidays but on a pro-rata basis. If the terms of their employment dictate that they must work on bank holidays, they do not have the right to refuse such work.
Exceptions to Paid Holiday Entitlement
While most employees are entitled to paid holiday, there are some exceptions to the usual rules. These can depend on factors such as employment status and the type of work involved.
1. Pro-Rata Holiday Entitlement For Part-Time Workers
To determine an employee’s holiday entitlement, you can multiply the number of days they work per week by 5.6. For instance, the statutory paid holiday of a part-time employee working three days a week would be worked out as follows: 3 x 5.6 = 16.8 days.
Likewise, if a staff member joins or departs during the holiday year, their annual leave will be calculated based on their actual employment duration with you. It will be a proportionate share of the full entitlement they have accumulated, referred to as their pro-rata holiday entitlement.
2. Annual Holiday Entitlement For Employees Who Joined Mid-Year
Employees who join the company halfway through the year, for example, will also receive a pro-rata entitlement of holiday. For example, if a worker joins in March with a standard 28-day entitlement, they have 10 remaining months in the holiday year. The calculation is: (10 ÷ 12) × 28 = 23.3 days. Alternatively, using the 5.6-week multiplier: 3 days/week × 5.6 = 16.8 days for a part-time worker on three days per week. Note that the statutory entitlement is always capped at 28 days, as confirmed by Acas.
3. Entitlement For Dismissed Employees
Whatever the cause of the worker’s dismissal, they will have to be paid for the holiday not taken. Then, the equivalent of 2.3 days of holiday per working month must be paid to the employee.
4. ‘Carry-over’ or Accrued Days
Under UK rules, the default position is that untaken statutory leave lapses at the end of the leave year. However, the rules differ depending on which portion of leave is involved. The first four weeks (Regulation 13 leave) must be allowed to carry over when a worker cannot take it due to long-term sickness and must be used within 18 months of the end of the leave year in which it accrued, as confirmed by Acas. The additional 1.6 weeks (Regulation 13A leave) is subject to a use-it-or-lose-it rule and may lapse unless the employer’s policy states otherwise. Per Acas, workers on maternity, paternity, or other statutory leave must be allowed to carry over any holiday they were unable to take during that period.
Factorial’s Time Off Tracker
You can use our time off tracker to work out pro-rated annual leave entitlements for part-time staff or to calculate holiday allowances for employees who start or end their employment with you in the middle of the year.
Simply enter how many days a week an employee works, what your holiday entitlement is for a full-time employee, and whether or not they started accruing holidays part way through the year, and we will do the rest!
Holiday Pay Entitlement
Holiday pay refers to the compensation an employee receives when taking their legally mandated holiday entitlement. For full-time employees with fixed weekly working hours, this equates to receiving the same amount of pay as they would in a regular workweek.
Legally, workers are entitled to receive one week’s pay for each week of statutory holiday taken. For the first four weeks of statutory leave (Regulation 13 leave), holiday pay must reflect a worker’s normal remuneration – including regular overtime, commission, and shift premia – not just basic pay, as confirmed by the CIPD. The remaining 1.6 weeks may be paid at basic rate only. As reported by Gov.uk, in total, most workers receive 5.6 weeks of paid holiday per year, separate from statutory sick pay.
How is Holiday Pay Calculated?
Holiday pay is usually based on an employee’s normal earnings, but the exact calculation can vary depending on their working pattern and pay. Understanding how holiday pay is worked out can help ensure employees receive the correct amount.
Calculating Holiday Pay For Full-Time Employees
Generally speaking, it’s straightforward to calculate the holiday pay for full-time employees. For those employees on a fixed monthly salary, you must determine the average number of hours worked over a specific period, such as a week or a month. This average is then divided by the corresponding amount of payment.
For example, if a worker takes a week’s holiday, they will receive the same pay at the end of the month as they usually receive. Issues only arise when an employee starts or leaves partway through the holiday year (a holiday entitlement calculator is an invaluable tool in these cases).
Calculating Holiday Pay For Variable-Hour Employees
If an employee is part-time or on a zero-hours contract and works fewer hours each week, they will receive less paid holiday allowance. They are still entitled to 5.6 weeks of paid leave but in proportion to the hours that they actually work. This is simple enough if they work a set number of hours weekly.
However, if an employee works variable hours, things can be a bit more challenging. Employers must look back at a worker’s previous 52 paid weeks, known as the holiday pay reference period. For those workers who have been working for less than 52 weeks, the reference period is the total number of weeks they have worked. You must use their average hourly rate or average weekly pay during this period to make your calculations.
What Must Be Included in Holiday Pay?
For the first four weeks of statutory leave, holiday pay must reflect a worker’s normal remuneration. According to Acas, this includes: regular voluntary and compulsory overtime, commission payments, travel allowances that form part of normal pay, and shift premia. Payments that are genuinely irregular or exceptional – such as a one-off bonus – may be excluded. Employers who base holiday pay solely on basic salary for workers who regularly earn overtime or commission risk Employment Tribunal claims for unlawful deductions from wages.
The 12.07% Accrual Method for Irregular-Hours Workers
For irregular-hours and part-year workers in leave years starting on or after 1 April 2024, holiday entitlement accrues at 12.07% of hours worked in each pay period. This figure is calculated by dividing 5.6 weeks by 46.4 weeks (52 weeks minus 5.6 weeks of statutory leave). As noted by Legislation, the accrual is calculated on the last day of each pay period and rounded to the nearest hour.
It is important to distinguish between two separate calculations. The 12.07% method determines how much leave accrues, while the 52-week reference period determines how much each unit of leave is worth in pay terms. Employers must not conflate these two steps, as confirmed by Acas.
Holiday Pay Calculator
Calculating holiday pay can be complicated, particularly for employees with irregular hours or varying pay. The government’s holiday pay calculator can help you work out how much holiday pay your employees are owed.
Simply enter the relevant details about the employee and their pay to get an estimate of the holiday pay due. Using this tool can help you make accurate calculations and ensure you meet your legal obligations.
What Is Rolled-Up Holiday Pay – and When Is It Lawful?
Rolled-up holiday pay is a practice where an employer adds a holiday pay uplift – typically 12.07% – directly on top of a worker’s hourly rate during each pay period, rather than paying separately when leave is actually taken. For most of its history, this practice was considered unlawful in the UK following a 2006 European Court of Justice ruling. However, the position changed materially from 1 April 2024. Under the Employment Rights (Amendment, Revocation and Transitional Provision) Regulations 2023, rolled-up holiday pay is now lawful for irregular-hours and part-year workers in leave years starting on or after 1 April 2024, provided the uplift is clearly itemised as a separate line on the payslip, as confirmed by Acas. As noted by Legislation, it remains unlawful for fixed-hours or regular part-time workers.
Holiday Pay Record-Keeping: New Obligations from April 2026
From 6 April 2026, the Employment Rights Act 2025 introduced a mandatory record-keeping obligation for all UK employers. Acas confirms that employers must now keep adequate records of annual leave taken, entitlement accrued, and how holiday pay was calculated – including which elements (such as commission or overtime) were included. Records must be retained for at least six years and maintained in line with UK GDPR. Per Acas, failure to keep adequate records is a criminal offence and may result in a fine.
For businesses managing workers on variable hours or irregular pay, this means having systems capable of tracking 52-week average earnings accurately. Factorial’s Time Off Software provides a centralised, cloud-based record of all leave taken and entitlement accrued, giving employers the audit trail they need to demonstrate compliance with the April 2026 record-keeping duty.
Overtime Pay and Laws in the UK
There is no statutory requirement for a UK employee to work overtime, just as there is no statutory requirement for an employer to offer additional hours.
There is no legal obligation to pay workers for working extra hours beyond their contracted hours. However, you must ensure that average pay across all hours worked does not fall below the National Minimum Wage. Separately, where a worker regularly works overtime, that overtime pay must be included in holiday pay calculations for the first four weeks of statutory leave, as confirmed by Acas. Read our full guide to find out more about overtime pay and how to calculate it.
How Can HR Software Help With Calculating Holiday Pay?
Time off is the most important thing to consider when calculating holiday entitlement. This can be a time-consuming and complex process if you have a range of contract types. You need to be sure about the hours each employee has worked and have kept a reliable record of this.
Implementing a digital solution is the most effective way to ensure your holiday entitlement calculations are accurate. This will simplify the process, saving you time and headaches in the long run. Doing so will also ensure you comply with UK holiday pay and time off regulations.
With Factorial’s Time Off Software, you can keep track of fixed hours worked from one centralised place. Our all-in-one, cloud-based solution acts as an automated holiday entitlement calculator for your organisation. It also facilitates holiday requests and approvals to quickly track remaining holidays. See it in action for yourself with a free demo.
FAQ
What is holiday entitlement?
Holiday entitlement is the amount of paid time off an employee is legally entitled to take. In the UK, the statutory minimum for most workers is 5.6 weeks per year, which equates to 28 days for someone working a five-day week.
Does 28 days holiday entitlement include bank holidays?
This depends on the employer and should be specified in the employment contract. An employer can include the eight UK bank holidays within the statutory 28-day entitlement, or they can offer them as additional paid days off.
Is 20 days annual leave legal in the UK?
An entitlement of 20 days is only legal if the employee also receives at least eight additional paid days off, such as for bank holidays. The total statutory minimum paid holiday entitlement in the UK is 5.6 weeks, or 28 days for a full-time employee.
How do I calculate holiday entitlement?
For part-time staff, multiply the number of days they work per week by 5.6. For complex cases like variable hours or mid-year starters, using an all-in-one business management software like Factorial automates these calculations to ensure accuracy and compliance.
What is the formula for calculating holiday pay in the UK?
For salaried employees, holiday pay is their normal rate of pay. For workers with variable hours, it’s calculated using their average pay over the previous 52 paid weeks. This reference period excludes any weeks where they were not paid.
