Holiday entitlement is one of the most common areas where small businesses get tripped up. The basic rule is straightforward, but once you start dealing with part-time staff, irregular hours, bank holidays, carry-over, and variable pay, the calculations become much less obvious. Mistakes can lead to underpayment, employee grievances, or even tribunal claims.
This guide covers everything UK SMEs need to know about holiday entitlement, from the statutory minimums to the practical policies that keep things running smoothly.
The statutory minimum
Every worker in the UK is entitled to 5.6 weeks of paid holiday per year. For someone working five days a week, that works out at 28 days.
This is a minimum, not a target. Many employers offer more. But the 28-day figure is the legal floor, and you cannot contract out of it.
One point that catches employers and employees alike: there is no statutory right to bank holidays specifically. The 28-day minimum can include bank holidays. So an employer offering 20 days of annual leave plus 8 bank holidays is meeting the statutory minimum exactly. An employer offering 25 days plus 8 bank holidays is offering 33 days, which is 5 more than the legal requirement.
What matters is that your employment contract states the position clearly. Employees should know how many days they get and whether bank holidays are included in or additional to their allowance.
Part-time workers
Part-time workers are entitled to the same 5.6 weeks of holiday, calculated on a pro-rata basis. The formula is simple: 5.6 multiplied by the number of days the employee works per week.
For example, an employee working three days per week is entitled to 5.6 x 3 = 16.8 days of paid holiday. An employee working four days per week gets 5.6 x 4 = 22.4 days.
Under the Part-Time Workers (Prevention of Less Favourable Treatment) Regulations 2000, part-time workers must not be treated less favourably than comparable full-time workers. This means that if your full-time staff receive 33 days (25 plus 8 bank holidays), your part-time staff must receive the pro-rata equivalent, not just the statutory minimum.
Bank holidays can be particularly confusing for part-time workers. If a bank holiday falls on a day they normally work, they should either have the day off as part of their entitlement or receive a day in lieu. If it falls on a day they do not work, they should still receive a pro-rata share of the bank holiday entitlement. The simplest approach is to convert everything into hours and manage it through your HR software.
Irregular hours and part-year workers
Since April 2024, the rules for calculating holiday for irregular hours workers changed significantly. The previous system of complex calculations based on a 12.07% accrual method has been replaced by a clearer statutory framework.
For workers with irregular hours or those who only work part of the year (such as term-time workers), holiday now accrues at 12.07% of hours worked in each pay period. This accrual method gives a direct, period-by-period calculation that is easier to administer.
This change is particularly relevant for businesses that rely on zero-hours contracts or have staff with no fixed working pattern. If you employ workers on this basis, it is worth reviewing your holiday calculations to make sure they align with the current rules.
Bank holidays in practice
England and Wales have 8 public holidays each year. Scotland has 9, and Northern Ireland has 10. How you handle them in your business is a policy decision, but whatever you decide must be clearly documented.
The most common approaches are as follows.
Option 1: Inclusive. Offer 20 days of annual leave plus 8 bank holidays, totalling 28 days. This meets the statutory minimum exactly and is straightforward to administer.
Option 2: Additional. Offer a set number of annual leave days (typically 25) plus bank holidays on top. This is more generous and is increasingly common, especially in competitive sectors.
Option 3: Flexible bank holidays. Allow employees to work on bank holidays and take the days as leave at another time. This can work well for diverse teams where employees may prefer to take religious or cultural holidays instead.
Whatever approach you take, make sure it is in the employment contract or a linked holiday policy. Ambiguity leads to disputes.
Accrual in the first year
Holiday entitlement accrues from day one of employment. There is no waiting period before an employee can take holiday, although you can have a reasonable policy about when requests can be made and approved.
An employee who starts partway through the holiday year is entitled to a pro-rata amount for the remainder of that year. For example, if your holiday year runs January to December and an employee starts on 1 July with a standard 28-day entitlement, they are entitled to 14 days for the rest of that year.
It is good practice to set out clearly in your contract or handbook how holiday entitlement is calculated for starters and leavers. This avoids disagreements when someone joins or leaves mid-year.
Carry-over rules
Whether employees can carry unused holiday into the next year is one of the most frequently asked questions in HR.
The short answer: it depends on the type of holiday and the reason it was not taken.
The 28-day statutory entitlement is split, for legal purposes, into two parts. The first 20 days derive from EU-retained law (the Working Time Directive equivalent). The remaining 8 days are the additional UK entitlement.
For the 8 additional UK days, employers can apply a strict "use it or lose it" policy. If the employee simply did not get around to booking those days, they can be lost at the end of the holiday year, provided your policy says so clearly.
For the 20-day EU-derived entitlement, the position is more nuanced. Employers can still set a "use it or lose it" policy, but only if the employee was genuinely able to take the leave, was encouraged to do so, and was warned that it would be lost. If you did not actively encourage the employee to take their holiday, they may have a right to carry it over.
There are also situations where carry-over is mandatory. If an employee was unable to take holiday because of long-term sickness, they must be allowed to carry over up to 20 days of untaken leave. The same applies to maternity, paternity, and other statutory leave. These carried-over days must be available for at least 18 months after the end of the holiday year in which they accrued.
The safest approach is to have a clear written policy, encourage employees to take their full entitlement throughout the year, and keep records of any reminders you send.
Holiday pay calculations
For workers with regular hours and consistent pay, holiday pay is straightforward. They receive their normal weekly pay for each week of holiday.
For workers with variable pay, the calculation is more complex. Holiday pay must reflect what the worker would normally earn, including regular overtime, commission, and other payments that are intrinsically linked to the work they do.
The reference period for calculating variable holiday pay is 52 weeks (or the number of complete weeks worked if less than 52). You look back at the previous 52 weeks in which the worker was paid, add up the earnings, and divide by 52 to get the average weekly figure. Weeks in which no work was done are skipped and replaced by earlier weeks.
Getting holiday pay wrong for variable workers is one of the most common payroll errors. If you have staff on commission, regular overtime, or performance bonuses, take the time to check that your calculations are correct.
Requesting and approving holiday
The Working Time Regulations set default notice rules for holiday requests, although these can be overridden by your contract or policy.
Under the default rules, an employee must give notice of at least twice the length of the holiday they want to take. So for one week's holiday, they must give two weeks' notice. An employer can refuse a holiday request by giving notice of at least the length of the requested holiday. So to refuse a one-week request, you must give at least one week's notice of the refusal.
In practice, most businesses set their own rules for holiday requests, such as requiring a specific form or system, setting a minimum notice period, restricting holiday during busy periods, or limiting how many staff can be off at the same time.
These rules are perfectly reasonable as long as they do not prevent employees from taking their full statutory entitlement during the holiday year.
Practical tips for managing holiday
Use our holiday calculator to work out entitlement for new starters, leavers, and part-time staff. It saves time and reduces errors.
Invest in HR software to track holiday bookings, manage approvals, and flag potential clashes. Spreadsheets work for very small teams, but they quickly become unreliable as you grow.
Write a clear holiday policy. Cover the entitlement, bank holiday treatment, carry-over rules, notice requirements, and any restricted periods. Include it in your employee handbook and make sure everyone has access.
Encourage employees to spread their holiday throughout the year. This reduces the risk of a rush of requests at year-end and helps prevent burnout.
Keep records. You must be able to demonstrate that workers are receiving their statutory entitlement. Good record-keeping also protects you if there is ever a dispute about what was taken or owed.
Getting it right
Holiday entitlement is not complicated when the foundations are in place: a clear contract, a written policy, and a reliable system for tracking bookings and entitlements. The problems arise when these things are missing or inconsistent.
If you are not sure whether your holiday arrangements are legally compliant, or if you are struggling with calculations for part-time or variable-hours staff, book a free consultation with our team. We help SMEs across the UK get their HR fundamentals right, so you can focus on running your business.
