The 52-Week Holiday Pay Reference Period — A Plain English Guide

If you work variable hours, getting paid for your holiday is not as simple as checking your last payslip. Because your earnings fluctuate from week to week, employers need a fair way to decide what a "normal" week's pay looks like when you take time off.

To do this, UK employment law uses the 52-week reference period. It is designed to ensure you aren't unfairly penalized for taking a holiday immediately after a quiet week at work.

However, the rules on exactly which weeks count towards this 52-week average are widely misunderstood by both workers and payroll departments. Here is a plain English guide to how the 52-week reference period actually works.

What Is the 52-Week Reference Period?

Instead of basing your holiday pay on what you earned last week, your employer must look back at the last 52 weeks you worked. They add up all your earnings from those 52 weeks and divide the total by 52. The resulting figure is your "average weekly pay."

When you take a week of statutory holiday, you must be paid this exact average amount.

Which Weeks Count — and Which Are Excluded?

This is where most employers make mistakes. The 52-week reference period does not just mean "the last 52 calendar weeks." It means the last 52 weeks in which you were actually paid for working.

If you had a week where you earned absolutely nothing—perhaps because you were on an unpaid zero-hours break, on statutory unpaid leave, or off sick—that week is skipped. It is not included in the calculation as a £0 week, because doing so would drag your average down unfairly.

Instead of dividing by 52, your employer must go further back in time to find an older week where you did get paid, pulling that into the calculation to replace the £0 week. They can go back as far as 104 weeks (two years) to find 52 paid weeks.

How to Calculate Your Average Weekly Pay

The formula is simple once you gather the correct data:

(Total pay over the last 52 paid weeks) ÷ 52 = Average Weekly Holiday Pay

Worked Example (Variable Schedule)

Let's say over the last calendar year, you worked for 48 weeks and took 4 weeks off unpaid.

• Your employer skips those 4 unpaid weeks.
• They look back into the previous year to find 4 more weeks where you did work, bringing the total back up to 52 paid weeks.
• Over those exact 52 paid weeks, you earned a total of £15,600.
• Calculation: £15,600 ÷ 52 = £300 per week.

If you take two weeks of paid holiday, you must be paid 2 × £300 = £600.

What If You Haven't Worked 52 Weeks Yet?

If you have been with your employer for less than a year, they obviously cannot look back over 52 weeks. In this case, the reference period is simply the total number of complete weeks you have worked so far.

If you have worked for 12 weeks, your employer adds up your total pay for those 12 weeks and divides by 12. As you stay with the company longer, the reference period expands until it hits the 52-week cap.

How the Reference Period Changed in April 2020

Prior to April 2020, the holiday pay reference period was only 12 weeks. This caused massive problems for seasonal workers. If a retail worker did heavy overtime at Christmas but took a holiday in February, their 12-week average was high. But if they took a holiday in October (after a quiet summer), their average was very low.

The government changed the reference period to 52 weeks specifically to smooth out these seasonal spikes and dips, ensuring your holiday pay reflects a true annual average.

Frequently Asked Questions

Does overtime count in the 52-week average?

Yes. Following several high-profile legal rulings (including the Bear Scotland case), regular voluntary overtime, commission, and any other variable pay that is intrinsically linked to your job must be included in your holiday pay calculation.

What happens if I was off sick and received Statutory Sick Pay (SSP)?

If you received SSP (which is usually much lower than your normal wages), that week is also excluded from the calculation. Your employer must skip the sick week and go further back to find a week where you received normal pay.

What if my employer cannot find 52 paid weeks within the 104-week limit?

If your employer looks back a full two years (104 weeks) and can only find, for example, 40 weeks where you actually earned money, they stop there. They add up the pay for those 40 weeks and divide by 40 to get your average.