Is a Four-Day Workweek a "Luxury" or a Business Strategy? Insights from an Experiment with 15 Australian Companies in the AI Era

Three-day weekends, with no pay cut.

When people hear this, many might think it's an idealistic notion or something only privileged companies can afford. However, new research conducted in Australia challenges this intuition.

The study focused on 15 Australian companies that have already experimented with a four-day workweek. These companies spanned various industries, including logistics, property management, healthcare, and publishing, and ranged from small businesses with just two employees to medium-sized enterprises with up to 85 employees. The research team conducted interviews with decision-makers who led the implementation from early 2023 to the end of 2024, investigating why they adopted the four-day workweek and what effects and challenges they encountered.

The results were quite impressive. Fourteen out of the 15 companies continued with the four-day workweek after the trial period. Furthermore, none of the companies reported a decrease in productivity. Six companies noted an increase in productivity, while the rest maintained roughly the same level as before. Although these are self-assessments by the companies, the average success score was 8.5 out of 10. It seems clear that for many of the companies, the system worked surprisingly well.

The focus of this study was on a work style known as the "100:80:100 model." This model allows employees to receive 100% of their pay while working 80% of the traditional hours, with the expectation that they maintain 100% of their productivity. This is not simply a system of compressing the workweek into four 10-hour days. Instead, it aims to reduce the number of working days and total work hours by eliminating unnecessary meetings, emails, and rework, thereby achieving the same results in less time.

This distinction is crucial. On social media, there is often confusion between a "four-day workweek" and "cramming five days' worth of work into four days." The latter could increase the risk of burnout. In fact, on forums like Reddit, while there are voices welcoming a four-day workweek, there are also repeated reactions such as, "If it's four days of 10 hours each, it doesn't make sense," and "The true four-day workweek is about reducing work hours while maintaining the same pay." The study focused on a model closer to this "true" form.

An interesting aspect of this study is why companies decided to adopt a four-day workweek. While it is often discussed in the context of improving productivity—working more concentratedly in a shorter time to eliminate waste and improve results—this is certainly a major motivation. However, six out of the 15 companies cited "reducing burnout" as their primary goal.

In Australia, there is growing awareness of the issues related to overwork. A 2025 survey by Beyond Blue reported that about half of the workforce experienced burnout in the past year, with younger and parenting generations particularly at risk. Additionally, a survey by the Centre for Future Work found that Australian workers perform an average of 3.6 hours of unpaid labor per week, equivalent to 173 hours or more than 4.5 weeks annually.

Thus, the four-day workweek is emerging not as a "benefit to increase time off" but as an attempt to restore sustainability in workplaces that are nearing their limits. Employee turnover, absenteeism, mental health leave, and recruitment difficulties—all of these are costs to companies and reduce organizational competitiveness. A four-day workweek is not only an employee-friendly system but also a defensive strategy for companies to protect their workforce.

A female CEO of a medical tech company featured in the study emphasized metrics such as turnover, absenteeism, sick leave, and mental health leave as indicators of the system's success. Another female CEO of a financial company found it contradictory to advise clients to "live a good life" while her own employees couldn't practice it. The four-day workweek is not just a policy change but also a challenge to the consistency of corporate culture.

So why didn't productivity decline?

The key lies in "redesigning work." To reduce the number of working days, maintaining the status quo is not an option. Meetings need to be reduced or shortened. The use of emails and chats needs to be reconsidered. Low-priority tasks should be eliminated. In companies that require customer interaction, not everyone takes the same day off, allowing service to continue. In non-customer-facing companies, everyone may take a day off together, such as on Fridays.

In other words, implementing a four-day workweek forces a reevaluation of tasks. It questions the necessity of "meetings that have continued without much thought," "reports that no one reads," "confirmations just in case," and "habitual overtime." If work expands to fill the five-day container, then by making the container smaller, only the essential work might remain.

On social media, there is notable agreement on this point. On Reddit's Australia-related threads, posts with sentiments like "If five days' worth of work can be done in four, was it ever really five days' worth?" and "In desk jobs, there's a lot of time spent just being present" can be found. Another post mentioned, "With a four-day workweek, both employees and employers become more conscious of the value of working hours."

On the other hand, skepticism remains strong. A common question is, "Is it possible across all industries?" While it may be relatively easy to implement in office work or knowledge-based jobs, it becomes more challenging in sectors like healthcare, caregiving, education, retail, logistics, and public services, where constant staffing is necessary. If reduced staffing means someone else has to shoulder the burden, it simply becomes a transfer of responsibility.

There is also concern that "the intensity of work might become too high." Researchers and labor law experts point out that for a four-day workweek to succeed, it must be designed collaboratively between employees and companies rather than imposed from the top down. If work hours are reduced without reducing the workload, the speed of work could become excessively high, leading to exhaustion. Therefore, it is crucial to not only reduce meetings and streamline tasks but also decide "what not to do."

This study has its limitations. The sample size of 15 companies is small, and the focus was primarily on interviews with decision-makers who led the implementation. Companies that are more open to a four-day workweek are more likely to be included in the study, and their responses may be more positive. Additionally, each company measures productivity differently, with no standardized indicators such as sales, profits, on-time delivery, or customer satisfaction. Therefore, it is premature to conclude that "a four-day workweek will always increase productivity."

Nevertheless, the implications of this study are significant. At the very least, the simplistic notion that "reducing work hours will inevitably reduce output" no longer aligns with reality. Companies that seriously consider what needs to change to maintain output are often the ones discovering inefficiencies in their organizations through shorter work hours.

This discussion is closely linked to the work styles of the AI era. With generative AI and automation, corporate productivity is expected to increase further. The question is who will benefit from these gains. If only corporate profits increase while employees' workloads and stress remain unchanged, AI will become a pressure rather than a relief for workers. However, if part of the productivity gains is returned to employees as "time," AI could become a technology that enhances the quality of life.

According to The Guardian, the four-day workweek is not rapidly becoming mainstream in Australia; rather, the discussion is entering a mature phase. The path to institutionalization is complex, with trial implementations and withdrawals by large companies, opposition from local governments, demands from labor unions, and concerns from business associations. However, this does not mean failure. The five-day workweek did not become standard overnight in history. Labor reform has always involved experimentation, opposition, adjustment, and institutionalization.

For Japan, this is not just news from a distant country. Chronic long working hours, labor shortages, mental health issues, balancing childcare and caregiving, and commuting burdens in rural areas are challenges shared by Japanese companies. While only a limited number of companies may be able to directly adopt a four-day workweek, the questions raised by this study are directly applicable to Japanese workplaces.

"Is a five-day workweek really necessary?"

"Can we distinguish between work necessary for results and work that remains out of habit?"

"Can the efficiency gains from AI and digitalization be returned to employees as time?"

"Is work style reform being designed not just as recruitment marketing but as a measure to prevent turnover and burnout?"

The essence of a four-day workweek is not just about adding an extra day off. It is about reevaluating the value of work based on outcomes rather than time and redefining the state in which employees can produce results healthily and sustainably as a competitive advantage for companies.

As reactions on social media indicate, people are not simply saying they want to "take it easy." What many are seeking is a system that allows them to work without destroying their lives, meaningful work rather than unnecessary constraints. Voices of welcome, irony, caution, and calls for institutionalization all reflect a sense of discomfort with current work styles.

The experiment with 15 Australian companies also shows that a four-day workweek is not a panacea. Implementation requires planning, and industry-specific innovations are essential. Some companies may fail. However, it also demonstrated that if well-designed, it is possible to maintain productivity, reduce burnout, and reclaim employees' personal time.

The four-day workweek is no longer a "dream policy" but is becoming a management issue that needs to be examined. The next question is not whether we can work four days a week, but how well companies can justify the necessity of a five-day workweek.

Source URL

・Phys.org. Original article introducing the study on the introduction of a four-day workweek by 15 Australian companies, including research overview, number of companies, continuation status, impact on productivity, and limitations.
https://phys.org/news/2026-05-australian-companies-fourday-week.html

・Original paper published in Humanities and Social Sciences Communications. Referenced to confirm the 100:80:100 model, semi-structured interviews with 15 companies, conditions and effects of implementation, and research limitations.
https://www.nature.com/articles/s41599-026-07536-x

・The Independent reprint article. Referenced to confirm the content of The Conversation's distributed article.
https://www.independent.co.uk/news/world/australasia/four-day-work-week-australia-b2980369.html

・Beyond Blue's 2025 media release. Referenced as background information on the burnout situation of Australian workers and the risks for younger and parenting generations.
https://www.beyondblue.org.au/about/media/media-releases/1-in-2-Australians-Facing-Workplace-Burnout

・Centre for Future Work's 2025 survey. Referenced as background information on unpaid overtime by Australian workers, averaging 3.6 hours per week and 173 hours annually.
https://futurework.org.au/report/too-much-work-and-too-few-paid-hours/

・The Guardian article. Referenced to supplement the spread of the four-day workweek in Australia, corporate concerns, reasons for limited adoption, and discussions in the AI era.
https://www.theguardian.com/business/2026/mar/16/four-day-work-working-week-what-happened

・SAGE Journals published paper "Productivity and the four-day work week." Referenced for supplementary information on the 100:80:100 model, differences from compressed workweeks, work intensity, and the need for collaborative design.
https://journals.sagepub.com/doi/10.1177/1037969X251345189

・LinkedIn post by John Hopkins. Referenced to check the situation of the current article and original paper being shared on social media and the number of reactions visible within the public range.
https://www.linkedin.com/posts/drjohnhopkins_fourdayweek-fourdayworkweek-4dayweek-activity-7462745415659143168-t3f3

・Reddit r/australia related thread. Referenced to confirm trends of support, irony, concerns about compressed workweeks, and calls for institutionalization on social media and forums regarding the four-day workweek.
https://www.reddit.com/r/australia/comments/1m5xpau/working_a_fourday_week_without_taking_a_pay_cut/

・Past related threads on Reddit r/australia. Supplementary information on online reactions to the four-day workweek, including expectations for the 100:80:100 model, industry differences, and dissatisfaction with compressed workweeks.
https://www.reddit.com/r/australia/comments/141rnnx/10_australian_companies_have_embraced_the_4day/