More than one in four UK employees are ending the year with the equivalent of over three working weeks of unused holiday entitlement, raising fresh concerns for HR leaders around burnout, workplace culture and employee wellbeing.
New findings from Britain’s Work-Life Balance Report, compiled by leave management platform Timetastic using data from more than 180,000 employees, suggest many workers are still struggling to fully disconnect from work despite statutory annual leave entitlements.
For employers that do not permit holiday carry-over, the financial impact on staff can be significant. According to the research, a worker earning £30,000 who leaves 15 days of leave untaken effectively forfeits £1,731 in paid time off. For employees on £60,000 salaries, the figure rises to more than £3,500.
The findings point to a deeper organisational challenge around workload, engagement and workplace expectations. Google searches for ‘signs of burnout’ have reportedly increased by 150% over the past year, reflecting growing concern around stress and work-life balance across UK workplaces.
Experts warn that the consequences extend beyond fatigue. Workplace wellbeing specialists say insufficient recovery time increases the risk of burnout, emotional exhaustion and declining productivity, while prolonged stress can contribute to longer-term health issues.
The report also highlights the cultural barriers preventing employees from taking leave. Feelings of guilt, pressure on colleagues and ‘always-on’ workplace expectations continue to discourage staff from fully switching off. In high-pressure environments, overwork is often perceived as a sign of commitment, reinforcing presenteeism behaviours.
Even when holidays are booked, many employees fail to take them. Analysis of more than 372,000 holiday requests submitted through the Timetastic platform in 2025 found that nearly 20% were later cancelled, despite being booked more than four months in advance on average.
The data reinforces the importance of proactively monitoring leave patterns and identifying signs of overwork within teams. Frequent cancellations and low leave utilisation may indicate wider operational issues such as understaffing or insufficient workload coverage.
As organisations continue to focus on retention and wellbeing, ensuring employees feel able (and encouraged) to take time off is becoming an increasingly important part of long-term workforce strategy.
Photo by Lance Asper on Unsplash
