Four Day Week Impact Calculator 2026
Instantly calculate the business, financial, and environmental impact of switching to a 4-day work week. Measure productivity, cost savings, and carbon footprint reduction for your team.
Impact Assessment
Enter your business metrics to calculate the 4-day week impact
Total number of staff participating in the 4-day week.
Average contracted hours per week currently worked.
New contracted hours per week (typically 32 for a 4-day week).
Estimated savings on energy, cleaning, and office supplies per staff member.
Average distance employees travel one way to work (used for carbon calculations).
Your 4-Day Week Impact
Financial, time, and environmental benefits per year
Enter your business metrics above and click Calculate Impact to reveal your 4-day week projections.
4-Day Week Benchmarks
Quickly reference the standard benchmarks and impacts observed in global 4-day week trials, including the massive 2022 UK pilot program.
| Metric | Standard (5-Day) | Four-Day Week | Business Impact |
|---|---|---|---|
| Working Hours | 40 hrs / week | 32 hrs / week | 20% reduction in time |
| Annual Leave | 28 days | 53.6 days | +25.6 days off equivalent |
| Commuting Emissions | 260 days / yr | 208 days / yr | 20% less transport CO2 |
| Energy Costs | 100% | 80% | 20% overhead savings |
| Staff Retention | Baseline | -57% turnover | Massive recruitment savings |
Four Day Week Impact FAQ
Everything you need to know about transitioning to a 4-day work week, understanding the 100-80-100 model, and measuring the impact on your business.
The 100-80-100 model is the standard framework for a 4-day week: employees receive 100% of their pay, work 80% of their usual time (typically 32 hours), and maintain 100% productivity. It focuses on output and efficiency rather than hours physically present at a desk.
Yes, while payroll costs usually remain the same under the 100-80-100 model, businesses often see significant reductions in overheads. Savings come from lower energy consumption, reduced office supplies, and decreased facility wear-and-tear by operating one day less per week.
Numerous global trials, including the massive 2022 UK pilot, have shown that productivity either remains stable or actually increases. Employees report lower burnout, higher focus, and better time management, leading to maintained or improved output in fewer hours.
The environmental impact is substantial. By eliminating one day of commuting per week, a company can reduce its transport-related carbon emissions by 20%. Additionally, closing offices for an extra day significantly cuts electricity, heating, and overall corporate carbon footprints.
By reducing a standard 40-hour week to 32 hours, employees gain 8 hours off per week. Over a 52-week year, this equates to an additional 25.6 days off, effectively more than doubling the standard UK statutory leave of 28 days.
While it requires creative scheduling, the 4-day week has been successfully adopted across a vast range of sectors, including finance, tech, healthcare, hospitality, and education. The key is focusing on workflow optimization and covering essential services rather than the traditional 9-to-5 presence.