A groundbreaking international study spanning 12 months and involving 60 companies across four continents has revealed compelling evidence that the four-day workweek significantly improves employee mental health without sacrificing productivity. Conducted by researchers at Boston College in partnership with the nonprofit 4 Day Week Global, the study found that 78% of employees reported lower stress levels after transitioning to a 32-hour workweek, while company revenue remained stable or increased in 92% of participating organizations.
The mental health benefits observed were profound and multifaceted. Participants reported a 42% reduction in burnout symptoms, a 35% decrease in anxiety levels, and a 30% improvement in sleep quality. Perhaps most strikingly, the rate of employees considering quitting their jobs plummeted by 57% among those on the shortened schedule. “What we’re seeing isn’t just about having an extra day off,” explains Dr. Jonathan Rivers, lead researcher on the project. “The four-day week creates psychological space for recovery, allowing workers to return refreshed rather than perpetually depleted.”
Several unexpected benefits emerged during the study period. Employees reported having more time for preventive healthcare, with a 28% increase in routine medical checkups. Caregivers in particular benefited, with working parents experiencing a significant reduction in what psychologists call “role conflict stress” – the tension between work and family responsibilities. The extra day also enabled more time for exercise, with participants averaging 53 more minutes of physical activity per week.
However, the transition hasn’t been without challenges. Some companies struggled with scheduling coordination, particularly in client-facing roles. About 15% of participating organizations modified their approach mid-study, shifting from a universal Friday off to staggered schedules. “The key is flexibility,” notes management consultant Priya Kapoor. “Successful implementations focus on outcomes rather than hours logged, and empower teams to design schedules that work for their specific needs.”
As the data continues to accumulate, legislative bodies in several countries are taking notice. Scotland recently launched a four-day workweek pilot for public sector employees, while California lawmakers are debating tax incentives for private companies adopting the model. With mental healthcare costs for employers rising steadily – up 43% since 2020 according to Mercer data – the economic case for reduced-hour models is becoming increasingly compelling.
