thrive at work/Days not working effectively
Research finding · 03
One working day in five.
The average employee feels unable to work effectively because of exhaustion or stress on 48.5 days a year: 22% of a 220-day working year.
By Jerry Fiser, Founder & CEO · Reviewed by Marcin Bulik, Research Director · Updated November 8, 2026
How many days a year do employees struggle to work effectively?
thrive research (2026) shows the average employee feels unable to work effectively because of exhaustion or stress on 48.5 days a year, which is 22% of a 220-day working year, or about one day in five. Workload, manager support and sleep each separate employees by about 50 of these days a year. Two of the three, workload and manager support, are in the employer's hands.
- Average: 48.5 days a year not working effectively.
- That is 22% of a 220-day working year.
- Workload separates employees by about 50 days a year.
- Manager support separates them by about 50 days.
- Sleep separates them by about 50 days.
The finding in plain numbers.
Across the workforce, the average employee reported 48.5 days in the past year when exhaustion or stress stopped them working effectively. On a 220-day working year, that is about one day in five.
Three factors worth 50 days each.
Three factors each separated employees by about 50 of these days a year: how sustainable their workload was, how much support they had from their manager, and how well they slept. The HSE Management Standards name workload and support among the main causes of work-related stress. In the thrive data, the gap between the least and most sustainable workload is 54 days a year per person, and the gap in manager support is worth about €15,000 a year per person in working time.
What leaders can do.
Steps in order of impact.
- 1Workload is a leadership measure. Treat workload as a leadership measure, not a personal problem.
- 2Invest in managers. Train and free up managers to support their teams.
- 3Protect recovery. Protect recovery between working days, which supports sleep.
- 4Track days lost by team. Track the days lost by team every quarter.
What the numbers do and do not show.
These are associations between groups of employees, not proof of cause. Days of not working effectively are reported by employees themselves. The next studies test whether raising capacity changes outcomes and how scores line up with an employer's own absence and turnover records. Full methods are in the thrive at work white paper.
How to cite this finding.
thrive at work Research Division (2026). The Scientific Foundations of the thrive at work Framework: Methodology & Validation White Paper, first edition. Available at thriveatwork.ai/research/scientific-foundations.
thrive at work measures engagement (purpose, leadership, connection, growth) and capacity (energy, recovery, focus, resilience) in one anonymous assessment: see how the assessment works.
Most engagement problems show up first as falling energy, recovery and focus. thrive at work is a workforce performance platform: an employee engagement platform that also measures capacity to perform, so you can see strain by team before it turns into absence or resignations. Read more about employee capacity.
Sources.
- HSE Management Standards. www.hse.gov.uk
- thrive index validation study. thrive at work, 2025–26. Methodology.
Common questions
How many days a year are employees unable to work effectively?
What drives those days?
Can employers change it?
See these numbers for your own teams.
A 30-minute call shows what a first engagement and capacity assessment would reveal.