Definition
A working arrangement where employees work four days per week instead of five, typically with no reduction in pay, based on the principle that productivity gains from focused work offset the reduced hours.
UK Context
The UK hosted the world's largest four-day week trial in 2022, with overwhelmingly positive results. The movement has political support, with several UK parties expressing interest in supporting four-day week adoption. However, there is no current legislation mandating or incentivising four-day weeks. The right to request flexible working, extended to all employees from day one under the Employment Relations (Flexible Working) Act 2023, provides a mechanism for individual requests but does not specifically address organisational four-day week policies.
Best Practices
- Run a pilot programme with clear metrics before committing to a permanent four-day week
- Focus on redesigning work processes and eliminating inefficiencies rather than simply compressing work into fewer days
- Establish clear expectations about productivity and output standards
- Address coverage requirements for customer-facing or service roles through creative scheduling
- Measure impact on productivity, wellbeing, absence, and retention throughout implementation
Frequently Asked Questions
Does a four-day week mean reduced pay?
In the most common model, no. The 100-80-100 principle means employees receive full pay for four days of work, based on the expectation that productivity will be maintained through more efficient working practices. This is different from simply reducing hours and pay proportionally.
Can a four-day week work in all industries?
While the four-day week is easier to implement in knowledge-work and office-based roles, trials have shown it can work across various sectors including manufacturing, hospitality, and healthcare through creative scheduling, shift rotation, and staggered rest days. The key is adapting the model to fit operational requirements.
What were the results of the UK four-day week trial?
The 2022 UK trial involving 61 companies found that revenue remained stable or increased, sick days fell by 65 percent, staff turnover decreased by 57 percent, and 39 percent of employees reported being less stressed. 92 percent of companies continued with the four-day week after the trial ended.