Do UK Employers Have to Keep Time Records? NMW Rules Explained

If you run a small business in hospitality, retail or beauty, you have probably wondered whether you are actually required to keep records of the hours your staff work. It is a fair question. The rules are not always spelt out in plain language, and getting them wrong can be costly. This guide explains what UK law expects, why record-keeping matters and how to keep on the right side of HMRC without drowning in paperwork.

Do UK employers have to keep time records?

Yes, in practice most UK employers do. Under the National Minimum Wage Act 1998 and the National Minimum Wage Regulations 2015, employers must keep records that are sufficient to show they are paying each worker at least the National Minimum Wage or National Living Wage. Because minimum wage is calculated as an hourly rate, you generally cannot prove compliance unless you also know how many hours each worker actually worked. So while the law is framed around pay records, in reality accurate time records are what allow you to demonstrate that pay is legal.

On top of this, the Working Time Regulations 1998 require employers to keep records that are adequate to show they are complying with limits such as the average 48-hour working week. Together, these duties mean that keeping a reliable record of hours worked is not an optional nicety, it is part of running a compliant business.

What records do you actually need to keep?

The core idea is that your records should be sufficient to establish that each worker has been paid at least the minimum wage for the hours they worked. In practical terms, good records usually include who worked, on which dates, the hours they started and finished, any unpaid breaks, and what they were paid. If a worker is paid a salary, you still need to be able to show the hours behind that salary, because a salaried worker on long hours can slip below the minimum wage without anyone noticing.

• Hours worked for each pay reference period, including start and finish times.
• Breaks taken, especially unpaid ones, so working time is not overstated.
• Pay for each period and the resulting effective hourly rate.
• Deductions that might reduce pay below the minimum wage, such as charges for uniforms or tools.
• Worker details including age, because minimum wage rates change with age and apprenticeship status.

Historically the minimum record-keeping period under NMW rules was three years, and it was later extended to six years for records relating to more recent periods. Employment law changes over time, so it is sensible to retain records for at least six years to be safe. If in doubt, keeping more history rather than less protects you.

How long do you have to keep the records?

You should keep minimum wage records for a substantial period, currently six years for the relevant records, and it is wise to treat six years as your default retention period across the board. This matters because HMRC can look back over past pay when it investigates, and a worker can bring a claim relating to earlier periods. If you cannot produce records for a period under review, HMRC may simply take the worker's account of their hours, which can leave you unable to defend yourself even if you did nothing wrong.

What happens if you get it wrong?

HMRC enforces the National Minimum Wage on behalf of the government, and it can inspect employers, often prompted by a worker complaint but sometimes through targeted checks of particular sectors. Hospitality, retail and personal care are frequently in the spotlight because they employ large numbers of lower-paid and younger workers.

If an employer is found to have underpaid the minimum wage, the consequences can include being ordered to repay arrears to workers, financial penalties, and in some cases being publicly named by the government. Many minimum wage breaches are not deliberate. They happen through avoidable mistakes, such as not counting time spent opening up or cashing up, unpaid trial shifts, rounding hours down, or deductions that quietly push pay below the legal floor. Reliable time records are your first line of defence, because they let you spot these problems before HMRC does and prove your position if you are ever challenged.

Are paper timesheets and spreadsheets good enough?

They can be, but they carry real risks. Paper timesheets get lost, filled in from memory at the end of the week, or quietly amended after the fact. Spreadsheets are easy to edit, which is convenient but also means there is no strong evidence that a given entry reflects what really happened. If a dispute arises, an editable spreadsheet is far weaker evidence than a record captured at the moment the worker clocked in or out. The direction of travel, both for HMRC and for tribunals, is towards records that are contemporaneous and difficult to alter after the event.

How can small businesses keep accurate records without extra admin?

The practical answer is to capture hours automatically at the point they happen, rather than reconstructing them later. This is exactly the gap that Kiwii is built to close. Staff can clock in and out through WhatsApp, with no app to download and nothing new to learn, which suits busy hospitality and retail teams where people simply want to start their shift and get on with it. Each entry is time-stamped, tamper-proof and can include geolocation, so you end up with a clear, trustworthy record of who worked when.

For teams that prefer it, there is also a mobile app and a smartwatch option, so clocking in fits around how your business actually operates. The important point is that the record is created as the shift happens and cannot be quietly rewritten afterwards, which is precisely the kind of evidence that stands up if HMRC ever comes knocking.

A simple checklist to stay compliant

• Record every worker's start and finish times, not just their scheduled shift.
• Count all working time, including opening up, closing down and mandatory training.
• Track unpaid breaks accurately so hours are neither overstated nor understated.
• Check that deductions do not pull anyone below the minimum or living wage.
• Review pay against the correct age-related rate whenever rates change.
• Keep your records for at least six years and store them securely.

Keeping good time records is not about box-ticking. It protects your workers, protects your business, and gives you genuine peace of mind that your pay is legal and defensible. If you would like a simpler, more reliable way to capture staff hours, it is worth trying Kiwii. Let your team clock in from WhatsApp and see how much easier compliant, tamper-proof record-keeping can be.