Trust-Based Working Time and Time Tracking – What UK Employers Need to Know

The European Court of Justice ruling in CCOO (C-55/18), and the wave of continental legislation that followed it, has prompted many UK employers to ask whether trust-based working time (autonomous scheduling) still has a future. It does. Two points are worth separating at the outset. First, CCOO is addressed to Member States rather than directly to UK employers, and the UK has not legislated a general duty to record daily start and finish times: Regulation 9 WTR 1998 still requires only records adequate to show compliance with the 48-hour limit and the night work limits. Second, and more practically, the statutory rules that do bite govern the recording of working time, not its operational distribution or day-to-day flexibility.

What Trust-Based Working Time Actually Means

This waiver applies strictly to scheduling and operational oversight, not to statutory compliance and record-keeping duties. Under the Working Time Regulations 1998 (WTR 1998), employers bear a legal responsibility to ensure workers do not exceed statutory working limits and receive their mandatory rest entitlements. Regulation 9 requires records adequate to demonstrate that; the National Minimum Wage Regulations 2015 require records of hours worked and pay; and in a tribunal the employer carries the evidential burden. Trust-based models empower employees to manage their own schedules, but the employer still needs a documented record of the hours actually worked in order to discharge those duties.

Delegating Time Tracking to Employees

Employers are fully entitled to delegate the recording of hours to employees themselves. However, delegation does not transfer statutory liability. The employer retains three responsibilities that cannot be passed to the individual:

1. Providing the means – A suitable, reliable and accessible time recording system must be made available. UK law does not prescribe a technology, but an unmonitored spreadsheet or informal paper timesheet rarely produces records an employer can rely on in a tribunal or an HMRC inspection.
2. Duty of oversight – Management must actively oversee records. Systematic omissions, obvious data gaps, or implausible timesheet entries must be identified, flagged, and rectified.
3. Duty of care and statutory compliance – Employers must ensure adherence to the 48-hour average weekly working limit under Regulation 4 WTR 1998 (unless a valid individual opt-out agreement has been signed under Regulation 5), mandatory daily rest of 11 consecutive uninterrupted hours per 24-hour period (Regulation 10 WTR 1998), and minimum 20-minute rest breaks during working days exceeding 6 hours (Regulation 12 WTR 1998).

Overtime and Pay Compliance

A frequent complication in trust-based working arrangements is the assumption that unrecorded or autonomous overtime is automatically absorbed by an employee's annual salary. Under UK employment law, this depends entirely on the terms of the employment contract and statutory pay thresholds:

• National Minimum Wage (NMW) Compliance: Under the National Minimum Wage Act 1998, salaried staff must receive at least the statutory minimum rate for every hour actually worked. When employees work unrecorded overtime in trust-based models, their effective hourly rate can drop below the National Living Wage, exposing employers to severe HMRC penalties and arrears.
• Contractual Overtime & Time Off in Lieu (TOIL): Where overtime compensation or TOIL is provided for in the contract, contemporaneous time records serve as critical evidence. In the event of a dispute before an Employment Tribunal, detailed time tracking records protect both employer and employee.

Employee Consultation, Trade Unions, and Data Protection

When introducing electronic or automated time tracking systems into a trust-based working environment, employers must navigate collective consultation and data privacy rules:

• Collective Consultation: If your organisation recognises an independent trade union or has established an employee forum under the Information and Consultation of Employees (ICE) Regulations 2004, introducing new tracking tools or electronic monitoring mechanisms requires prior consultation with employee representatives.
• UK GDPR and Workplace Monitoring: Systems that record login timestamps, location data, or working hours process personal data. In line with the Data Protection Act 2018 (DPA 2018) and the Information Commissioner's Office (ICO) Employment Practices Guidance, employers must ensure transparency, establish a lawful basis for processing (typically legal obligation or legitimate interests), and avoid excessive or disproportionate monitoring.

A comprehensive working time policy or collective agreement should clearly specify:

• What working time data is recorded and the retention period (e.g. minimum 2 years under WTR 1998; 6 years for payroll records under NMWA 1998),
• Which managers or HR personnel have access to timesheets and compliance reports,
• The procedure for requesting, reviewing, and approving timesheet adjustments,
• Clear boundaries prohibiting intrusive behavioural tracking or automated performance scoring without explicit assessment.

Conclusion

Trust-based working arrangements and statutory time tracking compliance are not mutually exclusive. Autonomy over where and when work is completed can thrive alongside systematic time recording. By deploying intuitive, user-friendly software, organisations can empower their workforce with flexible hours while maintaining robust compliance with UK working time and wage regulations.

Legal Sources and Statutory Foundations

Statutory Provisions and Regulations

• Regulation 4 WTR 1998 / Article 6 Directive 2003/88/EC — Maximum 48-hour average working week calculated over a 17-week reference period
• Regulation 5 WTR 1998 — Voluntary individual opt-out agreement from the 48-hour limit
• Regulation 10 WTR 1998 / Article 3 Directive 2003/88/EC — Minimum daily rest entitlement of 11 consecutive uninterrupted hours in each 24-hour period
• Regulation 12 WTR 1998 — Rest breaks of at least 20 minutes for working days exceeding 6 hours
• Regulation 9 WTR 1998 — Statutory duty on employers to keep adequate records showing compliance with maximum working hours and night work limits (minimum 2-year retention)
• National Minimum Wage Act 1998 (NMWA) — Mandatory duty to maintain accurate working time and pay records for at least 6 years to prove NMW compliance
• Management of Health and Safety at Work Regulations 1999 — Employer obligations to assess workplace risks, including fatigue and working hours
• Information and Consultation of Employees (ICE) Regulations 2004 — Statutory employee information and consultation frameworks
• Data Protection Act 2018 (UK GDPR) — Legal requirements for processing employee data and workplace monitoring under ICO guidance

Key Jurisprudence

• ECJ, Judgment of 14 May 2019 – Federación de Servicios de Comisiones Obreras (CCOO) v Deutsche Bank SAE, C-55/18 — Member States must require employers to establish an objective, reliable, and accessible system enabling the duration of daily working time to be measured
• Employment Appeal Tribunal – Grange v Abellio London Ltd [2016] UKEAT/0130/16/DM — An employer must actively afford workers the opportunity to take their statutory rest, rather than simply refraining from preventing it; a purely passive policy is not enough
• Supreme Court – Royal Mencap Society v Tomlinson-Blake [2021] UKSC 8 — Working time for WTR purposes and hours that attract the National Minimum Wage are assessed separately, so autonomous working patterns must be tested against both

Legal status as of August 2026. This article provides general information and does not constitute formal legal advice.