Leaver Holiday Pay Calculator: How to Work Out What You Owe

When an employee hands in their notice, one of the first things you need to work out is what happens with their holiday. Have they taken too much? Have they not taken enough? And how much money is involved either way? Getting this wrong can lead to disputes, underpayments, or even tribunal claims. Getting it right only takes a few minutes of calculation, but the rules are not always as obvious as they seem.

This guide walks through exactly how leaver holiday pay works in the UK, with worked examples and clear explanations of what you can and cannot do as an employer.

The Leaver Calculation Headache

Most employers set a leave year that runs from January to December, or from April to March. When an employee works the full year, everything is straightforward: they get their full entitlement and take it throughout the year. The complication arises when someone leaves mid-year.

At the point of leaving, the employee has only "earned" a proportion of their annual holiday. If they have taken less than that proportion, you owe them money. If they have taken more, you may be able to recover the difference. But whether you can actually reclaim it depends on what is in the employment contract.

This is one of the most common payroll headaches for small businesses, and it catches out employers who have not planned for it. The good news is that the calculation itself is simple once you understand the steps.

How Holiday Accrual Works for Leavers

The principle is proportional entitlement. If an employee's leave year is 365 days and they work for 200 of those days, they have earned 200/365 of their full holiday allowance.

The formula is:

Accrued entitlement = annual entitlement × (calendar days elapsed / total days in leave year)

Note that this uses calendar days from the start of the leave year to the employee's last working day, inclusive. It does not matter whether some of those days fell on weekends or bank holidays. The calculation is about what proportion of the leave year has passed, not how many shifts were worked.

Worked Example: Employee Owed Pay

Sarah works full-time with 28 days of annual leave. Her leave year runs January to December (365 days). She resigns with a last working day of 31 August.

• Days elapsed: 1 January to 31 August = 243 days
• Accrued entitlement: 28 × (243 / 365) = 18.63 days
• Holiday taken: 14 days
• Balance: 18.63 - 14 = 4.63 days unused
• Daily rate: £30,000 / (5 × 52) = £115.38
• Payment owed: 4.63 × £115.38 = £534.21

Sarah is owed £534.21 in her final pay for untaken accrued holiday.

Worked Example: Employer Can Reclaim

James also has 28 days of annual leave on a January-to-December leave year. He leaves on 30 April.

• Days elapsed: 1 January to 30 April = 120 days
• Accrued entitlement: 28 × (120 / 365) = 9.21 days
• Holiday taken: 15 days
• Balance: 9.21 - 15 = -5.79 days overpaid
• Daily rate: £25,000 / (5 × 52) = £96.15
• Potential deduction: 5.79 × £96.15 = £556.71

James has taken 5.79 days more than he has earned. If his contract includes a holiday clawback clause, the employer can deduct £556.71 from his final pay. Without such a clause, the employer has no legal right to make the deduction.

Can You Deduct Overpaid Holiday from Final Pay?

This is the question that causes the most problems. The answer depends entirely on the employment contract.

The Employment Rights Act 1996 prohibits employers from making unauthorised deductions from wages. An employer can only deduct overpaid holiday if the employee has agreed to it in writing, which in practice means a clause in their employment contract or staff handbook that specifically covers this scenario.

A typical clause might read: "If, on termination of employment, you have taken more holiday than your accrued entitlement, the company reserves the right to deduct the value of excess days from your final salary payment."

Without this clause, the employer's only option is to ask the employee to repay the amount voluntarily, or to pursue it as a civil debt, which is rarely cost-effective for the sums involved.

It is also worth noting that deductions cannot reduce the employee's pay below the National Minimum Wage for the hours worked in their final pay period. If the deduction would push them below the minimum wage threshold, it must be reduced accordingly.

What Happens During the Notice Period

A common mistake is to stop counting holiday accrual once the employee gives notice. In fact, holiday continues to accrue throughout the entire notice period, right up to the last day of employment. This applies whether the employee is working their notice, on garden leave, or being paid in lieu of notice (PILON).

If you want the employee to use up their remaining holiday during their notice period, you can require them to do so, but you must give them the correct amount of notice. Under the Working Time Regulations, the employer must give at least twice as many days' notice as the leave they want the employee to take. So if you want them to take five days of holiday, you need to give them at least ten days' notice.

If the notice period is too short to require the employee to take all their remaining leave, any unused balance must be paid out as payment in lieu.

Common Mistakes to Avoid

• Using months instead of days: Calculating accrual based on complete months (e.g. "they worked 8 out of 12 months") is less accurate than using calendar days and can short-change the employee.
• Forgetting the notice period: Accrual does not stop when the employee gives notice. Their last working day (or last day of employment if on garden leave) is the date to use.
• Deducting without a contract clause: Even if the employee clearly took more holiday than they earned, you cannot deduct it without written agreement.
• Ignoring variable pay: For employees with commission, regular overtime, or bonuses, holiday pay should reflect their normal earnings averaged over a 52-week reference period, not just their basic salary.
• Not rounding carefully: While there is no legal requirement to round up accrued days, employers should be consistent and never round below the statutory minimum.

What About Employees on Variable Hours?

For zero-hours contract workers, agency staff, or anyone without fixed weekly hours, the accrual calculation works differently. Rather than using an annual entitlement in days, their holiday pay is typically calculated as 12.07% of hours worked (which represents the 5.6 weeks statutory entitlement as a percentage of 46.4 working weeks).

When a variable-hours worker leaves, you should calculate their total hours worked since the start of the leave year, apply the 12.07% to find accrued holiday hours, subtract any holiday hours already taken, and pay the difference at their average hourly rate over the 52-week reference period.

Employer Obligations: A Checklist

• Calculate accrued entitlement up to and including the last day of employment.
• Compare accrued entitlement against holiday already taken.
• If the employee has unused days, pay them in lieu in the final payslip.
• If the employee has overpaid days, only deduct if the contract permits it.
• Ensure any deduction does not reduce final pay below the National Minimum Wage.
• Keep records of the calculation in case of a future dispute.
• Issue the final payslip with a clear breakdown of the holiday pay adjustment.

Further Reading

• UK Holiday Entitlement Guide 2026 - everything you need to know about statutory leave.
• UK Employment Law: Staff Leave, Sick Pay, and Holiday Rights - the full legal picture in one place.
• Pro-Rata Calculator - calculate part-time salary and holiday entitlement.