In the United Kingdom’s landmark 2022 pilot, 61 companies and nearly 2,900 employees adopted a shortened workweek and found that 92 % of the organisations chose to continue the model. That bold shift highlights how the concept of a “4-day workweek” is no longer fringe but becoming a serious option in countries, companies and policy debates.

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The idea isn’t simply working fewer days for fewer hours it involves models ranging from compressed workweeks (e.g., four days × longer hours) to reduced-hours models (e.g., working 80 % time for 100 % pay). This article explores which countries are leading the way, which companies are embracing the change, how the models work, what outcomes are emerging, and how employers and employees can navigate the shift.

Global Country Leaders & Pilots for 4-Day Workweeks

Here is a table of major countries actively adopting or piloting shorter workweeks:

Key take-aways:

• Trials span from public to private sectors and from service to manufacturing.
• Many models keep pay at 100 % but reduce hours or shift days.
• Early outcomes suggest productivity holds steady or improves in many cases.

Notable Companies Embracing the Shorter Week

Across the world, numerous companies have adopted or permanently switched to shorter workweeks.

Below are representative examples:

These company case studies show the practical variation in model and outcome, and suggest ways to scale the idea in diverse sectors.

Models & Metrics – How the 4-Day Week Works

The 4-day week can take two broad forms:

1. The Compressed Workweek Model

In this approach, employees complete their standard hours (e.g., 40 hours) over four longer days, often around 10 hours per day.

This model appeals to employers who want to maintain total productivity hours without adjusting pay or output expectations.

• Example – Belgium (2022): The government passed a law giving workers the right to compress their working week into four days. While total hours remain the same, it promotes flexibility and better work-life balance for employees with family or personal commitments.
• Benefits: Flexibility, reduced commuting, improved focus during workdays.
• Challenges: Longer days can lead to fatigue, especially in roles requiring manual labor or customer-facing service.

2. The Reduced-Hours or “100-80-100” Model

Popularized by the UK and Icelandic pilots, this model follows the 100-80-100 rule employees receive 100% pay for 80% of the time, provided they maintain 100% productivity.
It emphasizes efficiency, focus, and elimination of “time waste” (e.g., redundant meetings or low-value tasks).

• Example – United Kingdom (2022 Trial):
  61 companies and 2,900 employees took part. After six months:
  
  • 92% of companies continued with the model
  • 71% reported reduced burnout
  • 40% said productivity increased
• Example – Portugal (2023 Pilot):
  Involving 41 companies under the government-backed “100-80-100” scheme. 

Early results showed:

• Employee exhaustion dropped by 19%
• Productivity remained stable or improved slightly

3. Hybrid and Flexible Variants

Some organizations are testing hybrid 4-day systems alternating weeks or allowing teams to choose which weekday to take off.
For example, Atom Bank (UK) and Buffer (US) let teams choose their shorter week structures while monitoring KPIs like project delivery and customer satisfaction.

Key metrics for employers to track include:

Organizations that trial 4-day workweeks track both quantitative and qualitative indicators:

• Productivity: Output per hour, client satisfaction, revenue per employee.
• Well-being: Self-reported stress, burnout, and life satisfaction scores.
• Retention & Turnover: % reduction in voluntary exits.
• Absenteeism: Sick leave rates or time off due to stress.
• Customer & Revenue Impact: Service quality, sales growth, or project delivery rates.

From the UK pilot: 39 % of employees reported less stress, 71 % experienced lower burnout, while revenue rose 1.4 % on average.

Outcomes, Benefits & Challenges of 4-day Workweek

1. Measurable Benefits Across Trials

Global data from pilot studies reveal a consistent pattern: shorter weeks improve well-being and retention without harming output.

• UK Trial Results (2022):
  
  • 82% of companies continued with the model permanently.
  • 39% reported lower stress levels.
  • Average revenue increased 1.4% during the trial period. (Source: The Guardian, 2023)
    
    
• Iceland’s National Pilot (2015–2019):
  
  • 86% of the workforce now works shorter weeks.
  • Productivity remained unchanged or improved across most sectors.
  • Employees reported “dramatic increases in well-being.”
• Microsoft Japan (2019):
  
  • Productivity rose 40%, energy usage dropped 23%, and meeting times reduced drastically.
    (Source: Microsoft Work Trend Index)

2. Broader Organizational Gains

• Talent Retention: Companies report higher job satisfaction and lower turnover intentions, particularly among younger employees seeking flexibility.
• Work-Life Balance: Parents and caregivers find significant benefits from an extra day off, improving mental health and overall happiness.
• Gender Equality: Reduced-hour models help narrow gender gaps in household workload and career progression, as seen in Iceland and Spain.

3. Challenges and Realities

Despite enthusiasm, challenges persist:

• Industry Constraints: Healthcare, logistics, retail, and manufacturing face difficulty compressing shifts.
• Operational Pressures: Continuous client coverage (especially across time zones) requires innovative scheduling.
• Cost Implications: Some sectors find it hard to reduce hours without raising costs or lowering service availability.
• Cultural Barriers: In some countries (e.g., Japan, South Korea), work culture norms around “face time” hinder adoption despite pilot efforts.

4. Long-Term Impact

Early data suggests the 4-day week is more than a trend it’s part of a larger shift toward outcome-based work cultures.
However, success depends heavily on management maturity, trust, and organizational redesign not just reducing hours.

Companies adopting it permanently are doing so because it aligns with employee well-being, sustainability goals, and competitive advantage in talent attraction.

Regional / Industry Trends & What’s Next

• Industries most suited: Knowledge work, software, marketing, professional services.
• Less suited sectors: Healthcare, manufacturing with continuous shifts, retail open-seven-days.
• Regional trends: Europe leads the trial and legislative model. Asia-Pacific is emerging. For example Japan’s Microsoft trial, and Australia’s increasing interest.
• What’s next: Greater automation, hybrid work models and digital enablement may make shorter weeks more feasible globally.

For Employers & Employees – Implementation Advice

For employers:

1. Define your model and baseline metrics.
2. Pilot first (e.g., six months) with clear output goals.
3. Communicate value, involve employees.
4. Track productivity, well-being and turnover.
5. Adapt operations and technology (meeting culture, work allocation).

For employees:

• Clarify expectations: offer proof of productivity and outcomes.
• Use the extra day for rest, personal projects or learning.
• Stay engaged: shorter week isn’t guaranteed; performance matters.
• Understand your industry’s suitability for this model.

Conclusion

Shorter workweeks are moving from concept to reality. With countries like Iceland, the UK, Belgium and others piloting or legislating change and with companies proving that productivity can hold this is a global movement. But success depends on context: model, culture, operations and measurement.

For employers and employees alike the message is clear: it’s not simply about less work, it’s about smart work, better balance and shared output. As the world adapts, those

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