Minimum Wage, Holiday Pay and Time & Attendance: A Practical Guide for UK Employers

Key Highlights

• Paying only for rounded or penalised time can push some workers below the National Minimum Wage if your time and attendance system is not configured carefully.
• Aggressive rounding, blanket lateness penalties, and unpaid “extra” working time are common ways employers accidentally underpay staff, despite meeting headline minimum wage rates.
• Holiday pay for many UK workers must reflect “normal pay”, including regular overtime and certain allowances, often averaged over the previous 52 paid weeks under statutory holiday pay rules.
• Accurate data from a modern time and attendance system is essential to calculate both minimum wage and holiday pay correctly, especially for variable‑hours and lower‑paid staff.
• A well‑configured, cloud‑based time and attendance solution can enforce fair rounding, track overtime, integrate with payroll and provide reporting to evidence compliance.

As wage rules become more complex, UK employers need to think carefully about how their time and attendance software interacts with National Minimum Wage obligations and holiday pay legislation. The way you handle rounding, lateness and variable pay within your system can be the difference between simple, compliant payroll and an accidental underpayment problem.

This guide explains the key risks, points you towards authoritative resources such as GOV.UK guidance on calculating the minimum wage, ACAS advice on pay and lateness and holiday pay calculation guidance, and shows how Egress Systems’ time and attendance solutions can help you protect your business while paying staff fairly.

UK employers must ensure that a worker’s average pay for the hours they actually work does not fall below the applicable National Minimum Wage or National Living Wage over the relevant pay reference period. The pay reference period is the period covered by a payment and can be a day, week, fortnight or month—but never longer than one month. At the same time, statutory holiday pay must usually reflect a worker’s “normal pay”, which for many staff includes regular overtime and other recurring elements.

Because both calculations depend on accurate hours and pay data, your time and attendance setup directly affects compliance. If your rules or processes strip out too many minutes or ignore parts of normal pay, your payroll can look right on paper but still fall short legally.

From 1 April 2026, the National Living Wage for workers aged 21 and over rises to £12.71 per hour, making precision in time recording and pay calculations even more critical for lower‑paid staff.

How Rounding Rules Can Cause Problems

Rounding rules are common in time and attendance systems, for example, rounding to the nearest 5, 10 or 15 minutes to simplify payroll. Rounding itself is not unlawful under UK legislation, but it becomes risky when it consistently favours the employer and reduces paid time compared with hours actually worked.

Examples of potentially problematic approaches include:

• Always rounding late arrivals down to the next 15‑minute block, even if the employee is only a few minutes late.
• Making fixed “penalty” deductions (for example, 15 minutes of pay) regardless of the actual number of minutes missed.
• Ignoring short periods of required working time, such as security searches or mandatory checks at the start or end of a shift.

Over a pay reference period—which can be weekly, fortnightly or monthly depending on payment frequency—these practices reduce total paid hours and can push lower‑paid workers below the minimum wage threshold, even if your headline hourly rate appears compliant.

Designing Fair Rounding and Lateness Rules

To keep rounding defensible and fair, it helps to:

• Make rules symmetrical, so that rounding can benefit the worker as well as the employer over time—for example, rounding both early and late clockings to the nearest interval.
• Aim for neutrality across a pay period, avoiding rules that systematically disadvantage staff.
• Set clear thresholds for what counts as lateness and how it affects pay, and communicate those rules in contracts or referenced policies as recommended by ACAS guidance on unauthorised absence.

A modern time and attendance system can apply consistent rounding at the calculation stage while still storing exact timestamps for audit purposes, so you can demonstrate how pay was derived if challenged.

Lateness, Deductions and Policy

Employers are not obliged to pay for time that is not worked, such as unauthorised lateness, but there are limits on how far you can go with deductions. Any deduction for lateness must either be permitted by the contract or a contractual policy, or be agreed in writing, and you must still meet minimum wage overall for the pay reference period.

Common practical points include:

• Using the system to highlight patterns of lateness but dealing with repeat offenders mainly through performance management, not aggressive pay penalties, in line with ACAS guidance.
• Deducting only the actual minutes not worked, unless a clearly worded contractual scheme says otherwise.
• Checking regular reports for workers near the minimum wage to ensure deductions have not dropped their average pay below the legal rate.

Time and attendance tools make it easier to see both the detailed timelines and the bigger picture, so you can change policies before they create systemic problems.

What Counts as “Normal Pay”?

Holiday pay for UK workers should generally reflect what they normally earn, not just their basic contracted hours. Depending on the pattern of work, “normal pay” often includes:

• Regular overtime payments
• Shift premia or allowances paid on a consistent basis
• Some types of commission and supplements that are intrinsically linked to the job

If you exclude these elements, you risk underpaying staff for their holiday entitlement under the Working Time Regulations.

Using a 52‑Week Reference Period

For workers with variable hours or pay, employers usually need to calculate holiday pay based on average earnings over the previous 52 paid weeks. The statutory method is to:

1. Identify the last 52 weeks in which the worker received pay, skipping weeks with no pay (such as unpaid leave).
2. Add up all relevant pay for those weeks, including overtime and other elements that form part of “normal pay”.
3. Divide by 52 (or by the number of paid weeks if fewer than 52) to get the average weekly pay, and use that figure to pay holiday.

The reference period must not include weeks in which the worker received no pay or was on sick leave or statutory leave, such as maternity leave. If necessary, the employer can look back up to 104 weeks to gather data for 52 paid weeks.

Getting this right depends on consistently recording both hours and the correct pay elements, so that payroll can perform accurate averaging.

A well‑implemented time and attendance system underpins both minimum wage and holiday pay compliance by providing accurate, structured data.

Key ways it can help include:

• Accurate hours and overtime tracking – capturing start and finish times, unpaid breaks and overtime, so you know the true hours worked rather than estimates.
• Configurable rounding and lateness rules – allowing you to implement neutral, transparent rules in software and apply them consistently across the workforce.
• Reliable data feeds into payroll – integrating with HR and payroll systems so that hours, overtime and absence data flow automatically into pay calculations and 52‑week averages.
• Reporting and audit trails – producing reports on hours, deductions and effective hourly rates, and retaining historical records if you ever need to evidence your position to HMRC or in an employment dispute.

For organisations with a lot of variable‑hours or lower‑paid staff, this combination of accurate recording, consistent rules and strong reporting makes it much easier to maintain compliance at scale.

To reduce risk and get better value from your system, it is worth carrying out a structured review of both your configuration and your policies.

You can:

• Map your current rounding and lateness rules in the system and test scenarios at minimum wage rates to see their impact on a pay reference period basis.
• Align contracts and handbooks with what the system actually does, especially around deductions, lateness and unpaid time, following ACAS best practice.
• Work with HR and payroll to identify which pay elements need to be included in “normal pay” for holiday, and ensure the time and attendance system captures and codes them correctly.
• Set up regular reports for staff close to the minimum wage and for variable‑hours workers so that potential underpayments are spotted early.

If you are planning changes to your rules, a time and attendance specialist can help you model different approaches and implement settings that are both operationally practical and legally safer.