Time Tracking for UK Trade Businesses: NMW, Working Time, and HMRC Records

Time tracking is one of the administrative tasks that trade contractors consistently undervalue until they realise how much it is costing them not to do it. Whether the issue is demonstrating compliance with the National Minimum Wage for employees and apprentices, meeting the Working Time Regulations' requirements on rest periods, providing HMRC with an accurate record of hours worked for self-employed income verification, or simply understanding whether the hourly rate on a job is covering actual time spent, systematic time tracking pays for itself many times over.

National Minimum Wage Compliance

The National Minimum Wage and National Living Wage rates are set by the government and reviewed annually, typically increasing in April. From April 2025, the National Living Wage for workers aged 21 and over is £12.21 per hour, with lower rates for younger workers and apprentices. Trade contractors who employ workers — whether full-time, part-time, or on a casual or zero-hours basis — must ensure that the total pay divided by the total hours worked meets the applicable minimum wage rate. For apprentices in their first year or under 19, the apprentice rate applies. HMRC's minimum wage compliance team carries out audits and investigations and can require employers to back-pay the difference between what was paid and what should have been paid, plus a penalty of up to 200 per cent of the underpayment. Keeping accurate time records for each worker is the primary means of demonstrating compliance, and HMRC can request these records during an investigation.

Working Time Regulations 1998

The Working Time Regulations 1998 implement in UK law the EU Working Time Directive, which was retained as UK law post-Brexit. The Regulations impose obligations on employers in relation to maximum working hours, rest periods, and annual leave. The main provisions relevant to trade contractors include a maximum average working week of 48 hours (averaged over a 17-week reference period), a minimum daily rest period of 11 consecutive hours, a minimum weekly rest period of 24 hours, and a minimum of 28 days' paid annual leave per year for full-time workers (including bank holidays). Workers can individually opt out of the 48-hour maximum by signing a written opt-out agreement, and many workers in the construction industry do so. However, the rest period requirements cannot be opted out of, and employers who require workers to work without adequate rest periods may face enforcement action by the Health and Safety Executive.

HMRC Records Requirement for Self-Employed Income

Self-employed trade contractors are not required to submit time records to HMRC, but they are required to keep records sufficient to support the income and expenses figures on their Self Assessment return. For contractors whose income is based on an hourly rate — for example, a heating engineer charging £75 per hour for maintenance call-outs — time records are the primary evidence of the income earned. Without reliable time records, it is difficult to reconcile the hours billed against the income received, and HMRC enquiries that question the amount of income reported are much harder to defend. Under Making Tax Digital for ITSA, the digital record-keeping requirement reinforces the need for contemporaneous records: HMRC expects that income records are maintained at or near the time of the transaction, not reconstructed at year-end from memory or bank statements.

Time Tracking as a Business Intelligence Tool

Beyond compliance, time tracking is one of the most powerful tools available for understanding the true profitability of a trade business. A roofer who quotes a job at £150 per day of labour and then spends twice as many days on it as estimated is not making the margin the quote suggested — but without time records, this may not be apparent until the accounts are done at year-end by which point the learning opportunity has passed. Recording time at the job level, and comparing actual hours against estimated hours, reveals which types of work the business is consistently underestimating, which clients' jobs tend to run over, and which operatives are most productive. Over time, this data enables better estimating, which means fewer loss-making jobs and a healthier overall business.

Apprentice Time Records and Training Requirements

For trade contractors who take on apprentices — and the Construction Industry Training Board levy creates both an obligation and an incentive to do so for many contractors — time records are particularly important. Apprenticeship standards require apprentices to spend a minimum proportion of their working time in off-the-job training, and this must be evidenced to the training provider. HMRC and the Education and Skills Funding Agency audit apprenticeship arrangements and require employers to demonstrate that the apprentice has received the required training and has met the off-the-job training standard. Time records that show when the apprentice was on-site, when they were in college, and when they were in structured training activities support both the compliance audit and any subsequent claims for CITB grant funding.

VAT and Time: Identifying Taxable Periods

For VAT-registered contractors who work on long projects, time records can also be relevant to the identification of the correct tax point for VAT purposes. Where payments are made in stages, the tax point for each payment is the earlier of the date the payment is received or the date a VAT invoice is issued. For contractors working on a time-and-materials basis, the point at which services are performed determines the basic tax point, and time records provide the evidence to support when work was done and at what rate. This is particularly relevant where a project spans a change in VAT rate — if the Government were to change the standard rate, knowing exactly when work was performed relative to the rate change would determine which rate applies to each portion of the fee.

How QuotCraft's Time Tracking Works for UK Contractors

QuotCraft's time tracking module allows contractors and their employees to log hours against specific projects, clients, or work types directly in the app, with a built-in timer for real-time tracking on site and a manual entry option for logging time retrospectively. Time entries are associated with a project record, so the actual time spent on a job is always visible alongside the quoted time, enabling immediate comparison of estimated versus actual labour. The module supports multiple rates — standard, overtime, and apprentice rates — so that invoices generated from time records accurately reflect the applicable rate for each worker and period. For sole traders preparing their Self Assessment return, QuotCraft's time and income reports provide a summary of hours worked and income earned per period, supporting the digital record-keeping requirement under MTD for ITSA. For employers, the records support NMW compliance audits and Working Time Regulations documentation requirements.