Australia Just Proved the Four-Day Work Week Works. Here Is What the Data Actually Says.<br>Reading: Australia Just Proved the Four-Day Work Week Works. Here Is What the Data Actually Says.<br>Share
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A new study published in Nature’s Humanities and Social Sciences Communications journal has confirmed what many workers have quietly hoped for: companies can switch to a four-day work week and not only survive, but thrive.<br>The research tracked 15 Australian companies that trialled the 100:80:100 model between 2022 and 2024.<br>The model is simple: workers receive 100% of their pay , work 80% of their previous hours , and commit to maintaining 100% of their previous output.<br>The results were striking.<br>14 of the 15 companies chose to continue with the four-day week after the trial ended.<br>Not a single one reported a drop in productivity.<br>Six companies saw productivity actually increase.<br>The rest said output stayed roughly the same.<br>These firms operated across a wide range of industries, from property management to publishing and health technology, which makes the findings harder to dismiss as a niche experiment.<br>How the Study Was Conducted<br>The research team, led by Professor John Hopkins of Deakin University , spent two years conducting in-depth interviews with companies that had formally adopted the 100:80:100 model.<br>Interviews took place between early 2023 and late 2024.<br>Each company was free to define productivity on its own terms.<br>Some measured revenue and profit.<br>Others tracked projects completed on time, staff turnover rates, absenteeism, or a metric called “net promoter score,” which gauges how likely customers are to recommend a business.<br>This flexibility was intentional.<br>Rather than imposing a single performance benchmark, the researchers allowed each company to measure what mattered most to them.<br>That design choice reflects something important: what success looks like differs by industry , and a rigid, one-size-fits-all measurement would have made the findings less applicable to the real world.<br>One company had already been running the four-day model for nearly eight years by the time researchers interviewed them.<br>One firm did abandon the trial, though the researchers noted that timing played a significant role in that decision, as the company was already going through a period of major internal change.<br>Findings From the Study<br>The headline finding is clear: not one company reported a productivity loss.<br>Six of the 15 companies said productivity had actually gone up since making the switch.<br>The remaining nine said it stayed about the same.<br>Those might sound like modest numbers, but consider what they mean in practice.<br>If you give your employees a full extra day off each week, maintain their salaries, and your output either stays the same or improves, the business case is difficult to argue against.<br>Burnout emerged as a major theme in the findings.<br>Six companies expressly said that reducing burnout , rather than boosting productivity, was their primary motivation for adopting the shorter week.<br>That distinction matters.<br>A 2025 survey by Beyond Blue found that one in two Australian workers currently experiences burnout, with young people and parents identified as the groups most at risk.<br>One CEO of a medium-sized health technology firm told researchers she judged the trial’s success by tracking levels of “attrition,” “absenteeism,” and “people taking sick days and mental health days because they’re burnt out.”<br>Another CEO at a financial services firm put it plainly: her company had been encouraging clients to live their best lives, and it felt wrong to hold employees to a different standard.<br>“As we grapple with high workplace burnout, and societal challenges about what to do with the productivity gains we’re predicted to get from AI, a four-day work week could be an interesting part of both those conversations,” said study lead Prof John Hopkins of Deakin University.<br>What Most People Get Wrong About This Model<br>Here is the part that tends to get lost in the conversation.<br>Most people hear “four-day work week” and imagine companies taking a leap of faith, crossing their fingers, and hoping productivity does not collapse.<br>The reality is quite different.<br>The 100:80:100 model is not simply about cutting a day.<br>It is about forcing companies and their employees to look honestly at how time is actually being spent.<br>Unnecessary meetings get cut.<br>Tasks that could be automated or delegated get reassigned.<br>Work that was never that valuable gets eliminated entirely.<br>The result is that employees are not cramming five days of work into four.<br>They are doing four days of genuinely focused, higher-quality work.<br>This is a crucial distinction, and it explains why concerns about productivity often prove...