How do shorter working weeks affect productivity and pay?
Evidence on shorter or compressed working weeks is mixed, with results depending on the schedule and sector.
Covers: Evidence from trials, pilot programmes and studies on reduced working hours (such as four-day weeks) and their effects on productivity, output, wages and worker pay. It does not cover general flexible-working or remote-work arrangements unless they involve reduced hours.
Also answers: Do four-day workweeks reduce productivity? · What happens to pay when working hours are cut? · Does a shorter work week improve productivity? · Four-day week effects on productivity and salary
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The short answer
Interpretation AI-prepared starting mapThe evidence on shorter or compressed working weeks is mixed and depends heavily on the schedule and sector. A systematic review of 20 longitudinal studies found mostly no significant differences on at least one outcome, with increased sickness absence alongside improved shift satisfaction, and effects varying by shift length. A meta-analytic review of…12345
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At a glance
The picture in numbers
Live · updated just now
20 studies
50 trials
25%
25 in every 100
55 hours
The evidence behind it
6 sources- Reviews of many studies2
- Other studies and data3
- Background1
When it was published
Newest from 2026
| Source | Kind | Year |
|---|---|---|
| The consequences of a compressed workweek: a systematic literature review. | Reviews of many studies | 2025 |
| Assessing the Operational and Psychosocial Impact of the Compressed Workweek: A Meta-Analytic Review of Four-Day Work Week Trials Across Industries | Reviews of many studies | 2024 |
| The four-day workweek in Australia: insights from early adopters of the 100:80:100 model | Other studies and data | 2026 |
| Working Hours and Productivity | Other studies and data | 2017 |
| Feasibility and Impact of the Four-Day Workweek | Other studies and data | 2024 |
| Brazil's Congress approves shorter working week in win for Lula | Background | 2026 |
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Be the first to voteIn brief
Evidence on compressed and shorter working weeks is mixed: a review of 20 longitudinal studies found mostly no significant differences on at least one outcome, with more sickness absence but better shift satisfaction.1
Evidence-backedIn the Australian 100:80:100 model, maintaining previous performance did not require a 25% rise in hourly productivity.3
Evidence-backedCall-centre data show productivity falling as hours rise, with longer average call handling times, pointing to fatigue as a factor.4
Evidence-backedFour-day-week adoption has been reported to reduce stress, absenteeism and operational costs, but may raise some employee expenses.5
Evidence-backed
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What it means for you
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If you are an employer considering a four-day week
the evidence points to proactive workflow optimisation, flexible and staggered scheduling, elimination of low-impact activities such as redundant meetings, transparent pilots, and defined short- and long-term success measures as conditions for success.53
Evidence-backedIf you work in a sector with strong customer-facing or shift-coverage demands
the meta-analytic review identifies sectoral norms and implementation model as key moderators, and the systematic review found effects vary with shift length and the alternative schedule, so outcomes may differ from office-based pilots.21
Evidence-backedIf you are weighing a 100:80:100 arrangement
the Australian evidence suggests you may not need a 25% hourly productivity gain to hold performance, but you should expect to invest in planning, training and clear boundary-setting.3
Evidence-backedIf your main concern is pay
the clearest evidence here is the 100:80:100 model, which holds pay at 100%; other sources do not report measured wage changes, and one notes possible higher discretionary expenses for employees.35
InterpretationIf you are tracking policy developments
Brazil's Congress has approved a shorter working week, a political development that does not itself supply productivity or pay findings.6
Evidence-backedThe full explanation
Interpretation AI-prepared starting mapThe evidence on shorter or compressed working weeks is mixed and depends heavily on the schedule and sector. A systematic review of 20 longitudinal studies found mostly no significant differences on at least one outcome, with increased sickness absence alongside improved shift satisfaction, and effects varying by shift length. A meta-analytic review of over 50 four-day-week trials across healthcare, technology, education and public administration examined productivity, well-being, commitment and customer satisfaction, with sectoral norms, job autonomy and implementation model as key moderators. An Australian study of early 100:80:100 adopters (100% pay, 80% time, 100% output) reported that a 25% increase in hourly productivity was not needed to maintain previous performance. A call-centre study found that as hours worked rose, average call handling time increased, i.e. productivity fell, suggesting fatigue matters. A four-day-week study reported reduced stress, absenteeism and operational costs, but possible higher discretionary expenses for employees.12345
- Evidence 14
- Interpretation 5
The full story · 3 chapters
01
What the evidence shows
AI summary:Reviews and studies find mixed effects on health, absence, satisfaction and productivity, with outcomes shaped by sector, autonomy and implementation.
Evidence-backed: A systematic literature review of 20 longitudinal studies of compressed work schedules (employees working no more than 55 hours a week) found mixed results, identifying both positive and negative effects on health/well-being and work outcomes. Most studies found no significant differences in at least one outcome. The review reports that a compressed workweek increases sickness absence but also improves shift satisfaction. Effects were predominantly negative when compared with fixed day work, mixed when comparing a compressed workweek with 12-hour shifts to alternative arrangements, and there was limited evidence for compressed workweeks with 10-hour shifts.1
Evidence-backed: A meta-analytic review synthesised findings from over 50 four-day-week trial implementations across healthcare, technology, education and public administration, assessing operational efficiency and psychosocial outcomes. It evaluated impacts on productivity, employee well-being, organisational commitment and customer satisfaction, and highlights key moderators including sectoral norms, job autonomy and implementation model as influencing success or failure.2
Evidence-backed: A study of early adopters of the 100:80:100 model in Australia (100% pay, 80% time, 100% output) found that a 25% increase in hourly productivity was not required to maintain previous performance levels. Successful adoption required clear motivations for change, adequate planning and training, and established measures for evaluating short- and long-term success. Boundaries between work and non-work were clearly communicated across the different 100:80:100 schedules, and boundary permeability was low. The authors note academic studies of the 100:80:100 model are currently lacking.3
Evidence-backed: A study using daily data on working hours and performance of call centre agents found that as the number of hours worked increases, the average handling time for a call increases, meaning agents become less productive. The authors suggest fatigue can play an important role, even in jobs with mostly part-time workers.4
Evidence-backed: A study of four-day-week feasibility reports that successful adoption relies heavily on proactive workflow optimisation, flexible scheduling and elimination of low-impact operational activities such as redundant meetings. It reports the model reduces employee stress, absenteeism and organisational operational costs, but requires careful management to mitigate trade-offs such as increased discretionary or utility expenses for employees. It concludes that organisational inclusivity, transparent pilot programmes and staggered scheduling models are vital for making the four-day week a sustainable business strategy.5
Evidence-backed: Brazil's Congress approved a shorter working week, a measure supporters of President Lula hope will boost his popularity ahead of a presidential run-off. This is a political development; the report does not present productivity or pay findings.6
02
Pay and wages
AI summary:In the 100:80:100 model pay stays at 100% while time falls to 80%, though employees may face higher discretionary expenses.
Interpretation: On pay specifically, the clearest evidence here concerns the 100:80:100 model, in which pay is held at 100% while time falls to 80% and output is maintained at 100%. The Australian study of early adopters found that maintaining previous performance did not require a 25% rise in hourly productivity. Separately, the four-day-week feasibility study notes a possible trade-off of increased discretionary or utility expenses for employees, which would affect their effective financial position even if headline pay is unchanged.35
03
What it depends on
AI summary:Outcomes hinge on shift length, sector norms, job autonomy, implementation model, workflow redesign and fatigue as hours rise.
Interpretation: The evidence points to several conditions that shape outcomes. The systematic review found effects vary with shift length and the alternative schedule being compared. The meta-analytic review identifies sectoral norms, job autonomy and implementation model as key moderators. The four-day-week feasibility study emphasises proactive workflow optimisation, flexible scheduling, elimination of low-impact activities, transparent pilots and staggered scheduling. The Australian study stresses clear motivations, planning and training, and defined success measures. The call-centre evidence suggests fatigue effects on productivity as hours rise, which is relevant to how much output can be sustained in fewer hours.12354
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What to remember
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Evidence on compressed and shorter working weeks is mixed: a review of longitudinal studies found mostly no significant differences on at least one outcome, with more sickness absence but better shift satisfaction.
In the Australian :80:100 model, maintaining previous performance did not require a 25% rise in hourly productivity.
Call-centre data show productivity falling as hours rise, with longer average call handling times, pointing to fatigue as a factor.
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- 1The consequences of a compressed workweek: a systematic literature review.International archives of occupational and environmental health (Bernstrøm et al.)Published Jun 20, 2025Checked Oct 15, 2026
“We included peer-reviewed publications that empirically investigated the longitudinal relationship between compressed work schedules and employee health/well-being or work outcomes in employees working no more than 55 h a week. Twenty studies met the inclusion criteria. The study is registered in Prospero (CRD42020172595).ResultsThe 20 longitudinal studies yielded mixed results, identifying positive and negative effects on health/well-being and work outcomes. Most studies found no significant differences in at least one outcome. Results suggest that a compressed workweek increases sickness absence but also improves shift satisfaction. Predominantly negative health effects were observed when comparing a compressed workweek to fixed day work, mixed effects when comparing a compressed workweek with 12 h shifts to alternative shifts arrangements, and limited evidence for a compressed workweek with 10 h shifts.ConclusionThe impact of compressed workweeks remains uncertain, demonstrating mixed results on employee health and work outcomes. The findings vary depending on the length of shifts and alternative schedule.”
- 2Assessing the Operational and Psychosocial Impact of the Compressed Workweek: A Meta-Analytic Review of Four-Day Work Week Trials Across IndustriesGlobal Multidisciplinary Perspectives Journal (Oparah et al.)Published Jan 1, 2024Checked Oct 15, 2026
“This meta-analytic review synthesizes empirical findings from diverse industries to assess both the operational efficiency and psychosocial outcomes associated with this evolving work structure. Drawing from over 50 trial implementations across sectors such as healthcare, technology, education, and public administration, the paper evaluates the impact of reduced work hours on productivity, employee well-being, organizational commitment, and customer satisfaction. Quantitative outcomes are analyzed alongside qualitative evidence to explore industry-specific dynamics, cultural adaptations, and managerial concerns. The review highlights key moderators, including sectoral norms, job autonomy, and implementation models, that influence the success or failure of compressed workweeks. The findings provide comprehensive insights for policymakers, organizational leaders, and HR practitioners considering the transition to alternative scheduling frameworks aimed at fostering work-life balance and sustainable performance.”
- 3The four-day workweek in Australia: insights from early adopters of the 100:80:100 modelHumanities and Social Sciences Communications (Hopkins et al.)Published May 13, 2026Checked Oct 15, 2026
“Using a combination of border, boundary, and transformational leadership theories, our findings indicate successful adoption requires clear motivations for change, adequate planning and training, and established measures for evaluating both short-term and long-term success. Many examples of both work and non-work life benefits were captured; a 25% increase in hourly productivity was not required to maintain previous performance levels, the boundaries between work and non-work were clearly communicated across all different 100:80:100 schedules, and boundary permeability was found to be low. Academic studies into the 100:80:100 model are currently lacking, so these findings—based on the first-hand lived experiences of those who have experimented with this form of four-day week—make a valuable contribution to this emerging topic, providing important insights for both scholars, practitioners and policy makers. Working time reduction also has implications for the United Nations sustainable development goals, and the attainment of SDG3 (Good health and well-being), SDG5 (Gender equality), and SDG8 (Decent work and economic growth) targets.”
- 4Working Hours and ProductivityRePEc: Research Papers in Economics (Collewet & Sauermann)Published May 1, 2017Checked Oct 15, 2026
“This paper studies the link between working hours and productivity using daily information on working hours and performance of a sample of call centre agents. We exploit variation in the number of hours worked by the same employee across days and weeks due to central scheduling, enabling us to estimate the eect of working hours on productivity. We nd that as the number of hours worked increases, the average handling time for a call increases, meaning that agents become less productive. This result suggests that fatigue can play an important role, even in jobs with mostly part-time workers.”
- 5Feasibility and Impact of the Four-Day WorkweekZenodo (CERN European Organization for Nuclear Research) (Seidi)Published Dec 16, 2024Checked Oct 15, 2026
“The research demonstrates that successful 4DWW adoption relies heavily on proactive workflow optimization, flexible scheduling, and the elimination of low-impact operational activities (e.g., redundant meetings). The findings highlight that while the model successfully reduces employee stress, absenteeism, and organizational operational costs, it requires careful management to mitigate potential trade-offs, such as increased discretionary or utility expenses for employees. Implications: For corporate decision-makers, this thesis provides actionable recommendations for navigating resistance to change and maintaining service quality. The study concludes that organizational inclusivity, transparent pilot programs, and staggered scheduling models are vital for transforming the 4DWW from a conceptual framework into a sustainable, practical business strategy.”
- 6Brazil's Congress approves shorter working week in win for LulaBBC NewsPublished Oct 15, 2026Checked Oct 15, 2026
“Lula's supporters hope the measure will boost his popularity ahead of a presidential run-off in 10 days.”
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Open questions
What happens to actual wages, not just hours, under reduced-hour arrangements other than the 100:80:100 model, and how do any changes in discretionary expenses net out for workers?
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Do the reported productivity and well-being effects persist over years rather than months, and how do they hold across sectors with different customer-facing demands?
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How do compressed schedules (same total hours in fewer days) compare with genuinely reduced hours on productivity, absence and pay?
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