Standard work time

Standard work time in the United Kingdom is set at 40 hours per week, though this represents a common benchmark rather than a strict statutory maximum for all workers.

The Working Time Regulations 1998 establish the primary framework governing working hours across the UK. These regulations transpose the EU Working Time Directive and set a maximum average working week of 48 hours over a 17-week reference period. However, the 40-hour week has become the de facto standard for full-time employment in most sectors, particularly in office-based and professional roles. Individual employment contracts often specify 40 hours as the standard, though variations exist depending on industry, role, and collective agreements.

The Working Time Regulations 1998, as amended, form the governing legislation. The regulations apply to workers and employees across most sectors, with limited exemptions for certain professions including doctors in training, transport workers, and those in security roles.

No recent statutory change has altered the 40-hour benchmark, though the regulations continue to be interpreted and applied through case law and guidance from the Health and Safety Executive (HSE) and the Advisory, Conciliation and Arbitration Service (ACAS).

Employers and payroll teams must ensure that average working hours do not exceed 48 hours per week unless workers have explicitly opted out in writing. Contracts should clearly state the standard working hours expected, and records must be maintained to demonstrate compliance with the 17-week averaging requirement. Workers retain the right to withdraw from any opt-out agreement with appropriate notice, typically 7 days.