How To Calculate Holidays

Calculate your statutory holiday entitlement based on your working pattern and employment type

Understanding your holiday entitlement is crucial for work-life balance and legal compliance. This expert guide explains everything you need to know about calculating holidays in the UK, including statutory rights, pro-rata calculations, and special considerations for different employment types.

Understanding UK Holiday Entitlement Laws

The UK has some of the most generous statutory holiday entitlements in the world. Since April 2009, almost all workers in the UK are legally entitled to 5.6 weeks’ paid holiday per year (28 days for someone working five days a week). This is known as statutory leave entitlement or annual leave.

Key Facts About UK Holiday Entitlement

• 5.6 weeks is the minimum paid holiday entitlement per year
• This includes bank holidays (typically 8 days in England and Wales)
• Part-time workers get pro-rata entitlement
• Holiday pay should be at your normal rate of pay
• You start building up holiday as soon as you start work

Who Qualifies?

• Full-time and part-time workers
• Agency workers and zero-hours contract workers
• Casual workers (if they have worker status)
• Apprentices
• Workers on sick leave or maternity leave

The UK government’s official guidance provides comprehensive information about holiday rights. The entitlement applies from the first day of employment and builds up (accrues) during the time you’re working.

How to Calculate Holiday Entitlement

For Full-Time Workers

Full-time workers (typically working 5 days per week) are entitled to 28 days of paid annual leave. This is calculated as:

5.6 weeks × 5 days = 28 days

For Part-Time Workers

Part-time workers get a pro-rata entitlement based on the number of days they work. The calculation is:

5.6 weeks × [number of days worked per week] = annual entitlement

For example, someone working 3 days per week would be entitled to:

5.6 × 3 = 16.8 days (typically rounded up to 17 days)

For Workers with Irregular Hours

Workers with irregular hours (like zero-hours contracts) accrue holiday at a rate of 12.07% of hours worked. This is calculated as:

(5.6 weeks ÷ 46.4 weeks) × 100 = 12.07%

The 46.4 weeks accounts for the 5.6 weeks of holiday already included in the year.

Employment Type	Calculation Method	Example Entitlement
Full-time (5 days/week)	5.6 × 5	28 days
Part-time (3 days/week)	5.6 × 3	16.8 days
Zero-hours (variable)	12.07% of hours worked	12.07 hours per 100 hours worked
Shift worker (4on/4off)	5.6 × average weekly shifts	11.2 shifts

Pro-Rata Calculations for Partial Years

When you start or leave a job partway through the holiday year, your entitlement is calculated pro-rata. The standard method is:

1. Calculate full annual entitlement
2. Divide by 12 to get monthly accrual rate
3. Multiply by number of complete months worked

Example: An employee starts on 1 June with an annual entitlement of 28 days. By 31 December (7 months), they would have accrued:

(28 ÷ 12) × 7 = 16.33 days

For more precise calculations, some employers use a daily accrual rate:

Annual entitlement ÷ 365 = daily accrual rate

Pro-Rata Calculation Example

Scenario: Part-time worker (3 days/week) starts on 15 March in a company with an April-March holiday year.

Annual entitlement: 5.6 × 3 = 16.8 days

Proportion of year worked: 12/12 months (but only 11 months from start date)

Pro-rata entitlement: (16.8 ÷ 12) × 11 = 15.4 days

Bank Holidays and Holiday Entitlement

Bank holidays can be included in your statutory entitlement or added on top, depending on your contract. In England and Wales, there are typically 8 bank holidays per year. Scotland has 9, and Northern Ireland has 10.

Region	Number of Bank Holidays	2024 Dates (Example)
England & Wales	8	1 Jan, 29 Mar, 1 Apr, 6 May, 27 May, 26 Aug, 25 Dec, 26 Dec
Scotland	9	1 Jan, 2 Jan, 29 Mar, 6 May, 27 May, 5 Aug, 30 Nov, 25 Dec, 26 Dec
Northern Ireland	10	1 Jan, 17 Mar, 29 Mar, 1 Apr, 6 May, 27 May, 12 Jul, 26 Aug, 25 Dec, 26 Dec

If your contract includes bank holidays in your 5.6 weeks’ entitlement, you’ll need to use some of your annual leave for these days off. If they’re additional, you’ll get 5.6 weeks plus bank holidays.

The UK government’s bank holidays page provides official dates for each region.

Special Cases and Exceptions

Shift Workers and Night Workers

Shift workers, including night workers, have the same holiday entitlements as other workers. However, calculating their entitlement might be different if they work:

• Rotating shift patterns
• Compressed hours (e.g., 4 days on, 4 days off)
• Night shifts only

For shift workers, holiday entitlement is often calculated based on the average number of shifts worked per week over the reference period.

Workers with Variable Hours

For workers with no normal working hours (like some zero-hours contracts), holiday entitlement is calculated as 12.07% of hours worked. This is because:

5.6 weeks ÷ (52 weeks – 5.6 weeks) = 12.07%

The 5.6 weeks is subtracted because that’s the holiday entitlement itself.

Term-Time Workers

Term-time workers (like some school staff) only work during term time but are often paid monthly. Their holiday entitlement is calculated based on their working weeks:

(5.6 × working weeks per year) ÷ 52 = annual entitlement in weeks

Holiday Pay Calculations

Holiday pay should be calculated based on your “normal remuneration,” which includes:

• Basic pay
• Regular overtime (if it’s part of your normal working pattern)
• Commission payments (if they’re directly linked to work done)
• Certain allowances

The calculation method depends on your working pattern:

1. Fixed hours and pay: Use your normal weekly pay
2. Variable hours: Average pay over the previous 52 weeks (ignoring any weeks with no pay)
3. Shift workers: Average pay over a representative period

A landmark case in 2014 (Bear Scotland Ltd v Fulton) established that regular overtime should be included in holiday pay calculations. The ACAS guidance on holiday pay provides detailed information on these calculations.

Common Questions About Holiday Entitlement

Can my employer refuse my holiday request?

Yes, but they must have a good business reason and give you notice equivalent to the length of the holiday requested. They cannot refuse all holiday requests.

What happens to unused holiday when I leave a job?

You should be paid for any untaken holiday when you leave. This is calculated based on your holiday pay rate at the time of leaving.

Can I carry over unused holiday?

Normally, you must use your holiday in the current leave year. However, there are exceptions for:

• Long-term sick leave
• Maternity/paternity leave
• If your employer agrees

During COVID-19, special rules allowed carrying over up to 4 weeks of unused leave for 2 years.

Do bank holidays count towards my entitlement?

This depends on your contract. If bank holidays are included in your 5.6 weeks, you’ll need to use your annual leave for these days. If they’re additional, you get 5.6 weeks plus bank holidays.

Practical Tips for Managing Your Holidays

1. Check your contract: Understand whether bank holidays are included in your entitlement
2. Plan ahead: Submit holiday requests well in advance, especially for peak periods
3. Keep records: Track your holiday usage and remaining entitlement
4. Understand accrual: Know how your holiday builds up if you’re new or leaving
5. Use it or lose it: Try to use your entitlement each year as it typically doesn’t carry over
6. Check for enhancements: Some employers offer more than the statutory minimum

Many employers provide online portals where you can check your holiday balance and submit requests. If you’re unsure about your entitlement, ask your HR department or check your contract.

Legal Rights and What to Do If Things Go Wrong

If you believe your employer isn’t giving you your correct holiday entitlement or pay, you have several options:

1. Talk to your employer: Sometimes it’s a genuine mistake that can be easily resolved
2. Check your contract: Verify what you’re entitled to in writing
3. Contact ACAS: The Advisory, Conciliation and Arbitration Service offers free, impartial advice
4. Consider legal action: You can make a claim to an employment tribunal if necessary

Remember that holiday pay is a legal right, not a benefit that employers can withdraw. The Citizens Advice website provides excellent guidance on what to do if you’re not getting your proper holiday entitlement.

Time Limits for Claims

If you need to make a claim for unpaid holiday pay, you typically have:

• 3 months minus one day from the last incorrect payment to start ACAS early conciliation
• For a series of underpayments, you can claim for the current year and any previous underpayments that are part of a “series of deductions”

Recent case law has made it easier to claim for historical underpayments in some circumstances.