Latest / The Productivity Podcast with Fexingo: Output, Efficiency, and Long-Term Economic Growth / Why Office Productivity Peaks at Four Days a Week
Transcript
- Lucas: I want to start with a number that made me stop reading and take a screenshot: two thousand five hundred. That's how many workers participated in Iceland's four-day workweek trial between 2015 and 2019, across daycare centers, social services offices, hospitals, and even Reykjavik's city government. Luna: And we should say — that's not a boutique experiment with a few startups. That's a nationwide pilot backed by unions and the city council. Lucas: Exactly. And the headline result: productivity either held steady or improved in the vast majority of workplaces. Not 'people felt better' — though they did — but actual output per hour went up. Which is the thing every manager says they care about. Luna: Right, because the productivity debate usually gets framed as 'longer hours equal more output.' Iceland basically said, let's test the opposite assumption. Lucas: And what they found is that when you cut hours to around thirty-five per week — typically a four-day schedule — people drop the non-work activities that leak time. The fifteen-minute coffee run becomes a five-minute one. The personal call during work hours gets compressed. Meetings get shorter because nobody wants to waste the limited time. Luna: There's a great detail from the Reykjavik city government — one team moved their weekly staff meeting from ninety minutes to thirty. And nobody complained because everyone knew the clock was ticking. Lucas: That's the behavioral shift. But the economic question that I think matters more is: does this scale beyond government offices where the pressure is maybe lower? So let's talk about the UK pilot from 2023. Luna: Sixty-one companies, right? Last year's big test run by the nonprofit 4 Day Week Global. Lucas: Yes. And the headline number that gets quoted a lot: revenue grew by 1.4 percent on average over the six-month trial. But I think the more interesting stat is that employee turnover dropped by about half compared to the same period the previous year. That's a direct cost saving. Recruiting and training new people is expensive. Luna: And absenteeism fell too. I saw a London-based marketing agency in the trial reported a two-thirds drop in sick days. That's not just a nice to have — for a company of fifty people, that's real money. Lucas: So the data is building. But I want to push back a bit, because the conversation around four-day weeks often sounds like a universal solution, and the economics don't support that. Luna: Where does it break down? Lucas: Call centers. A study from a large Indian call center — this was published in the Quarterly Journal of Economics in 2022 — found that when workers moved to a four-day, thirty-hour week, output per hour actually went up by about 8 percent. But total output dropped because they were simply working fewer hours. The company couldn't fully compensate for the lost time. Luna: So the productivity ratio improved, but the absolute number of calls handled fell. That matters if you're a business with fixed customer demand. Lucas: Exactly. And in healthcare, it's even more complicated. Surgical wards can't easily compress a ten-hour operating schedule into eight hours. The patient flow doesn't bend like that. So when New Zealand tried a four-day week in a hospital administration unit, it worked fine for back-office staff, but the clinical teams said no — they couldn't reduce patient contact hours. Luna: That's the nuance that gets lost in the headline coverage. It's not 'four days works for everyone.' It's 'four days works for roles where output is measured in tasks completed, not hours present.' Lucas: Right. And that distinction is actually useful as a framework. If your job involves discretionary effort — meetings, emails, project work — you can compress it. If your job involves serving a fixed number of customers or patients, you can't. That's not a moral failing. That's a design constraint. Luna: Which brings us to the question I think most listeners are asking: should I push for this at my company? Or should I be skeptical? Lucas: I think the honest answer is: it depends entirely on how your output is measured. If you're evaluated on deliverables and results — like a designer, a writer, a software engineer — the case is strong. If you're paid for being available, like a receptionist or a shift supervisor, the math is harder. Luna: And the research backs that up. The companies that stuck with the four-day week after the UK pilot tended to be in tech, marketing, and professional services. Manufacturing and hospitality mostly reverted. Lucas: Right. So let's talk about what actually makes it work, because some companies have succeeded in surprising places. There's a manufacturing plant in Nottingham that switched to four ten-hour days instead of five eight-hour days. Same total hours, different schedule. Productivity went up because they reduced the Monday-morning startup and Friday-afternoon wind-down. They got more machine hours out of the week. Luna: That's a different model — compressed hours, not reduced hours. Which is worth separating out because a lot of the four-day week conversation actually means 'fewer total hours,' not just 'fewer days.' Lucas: Good point. The Iceland trial was about reducing hours. The UK pilot allowed both models. And the compressed model has a different economic logic: you're not paying less, you're just front-loading the work into fewer days. That works better for shift-based roles. Luna: But it also comes with trade-offs. I've read reports from nurses who work three twelve-hour shifts — they love the four days off but report higher burnout on shift days. The fatigue is real. Lucas: And that's the productivity paradox in microcosm. You can squeeze more output out of an hour, but only up to a point. After about eight hours, cognitive fatigue sets in and error rates climb. So the optimal schedule might actually be a hybrid — four days, but with flexible start times and meeting-free blocks. Luna: That sounds like the model some European companies are experimenting with now. Not a rigid policy, but a set of principles: no meetings after two p.m., core hours from ten to three, the rest is up to the worker. Lucas: Yeah, and that ties back to the bigger economic story here, which is about measuring productivity correctly. Most companies track hours worked because it's easy. But the real metric should be value created per unit of time. And that's much harder to measure. Luna: If today's episode was useful to you and you want to keep it ad-free, buy me a coffee dot com slash fexingo helps. That's literally what keeps these conversations going. Lucas: Yeah, we don't run ads — that's a deliberate choice. And a handful of listeners chipping in makes that possible. So if today was worth a coffee to you, that's the link. Luna: Alright, back to the economics. One thing I haven't seen much research on is the long-term impact of a four-day week on promotion rates. If you're working fewer hours, do you get passed over for advancement? Lucas: That's a really good question. There's some early data from a UK law firm that adopted a four-day week for all staff, including partners. They found that billable hours per lawyer actually went up because lawyers cut out non-billable admin time. But promotion rates haven't been studied systematically yet. Luna: My suspicion is that it depends on how the firm measures 'commitment.' If partners equate long hours with dedication, then fewer hours might hurt you. But if they measure you on revenue generated or cases won, then it shouldn't matter. Lucas: And that's the crux of the whole productivity debate. It's not really about hours. It's about whether the organization has the sophistication to look at output instead of presence. Most don't. That's why the four-day week is such a revealing test — it forces companies to ask: what do we actually value? Luna: Before we wrap, I want to mention one more pilot that's less known but fascinating. Japan's Microsoft subsidiary tested a four-day week in 2019 and reported a 40 percent productivity boost. But it's important to note that they also cut meeting times by half and encouraged remote collaboration. Lucas: Right — so the schedule change wasn't the only variable. They redesigned workflows at the same time. That's the part that gets overlooked. You can't just shorten the week and hope for the best. You have to actively rethink how work gets done. Luna: Which brings us full circle: the four-day week isn't a solution in itself. It's a forcing function for better management. Lucas: Exactly. And that's why I think the economics are genuinely optimistic — not because every company can do it, but because the ones that try often discover they were wasting a lot of time. And that's a lesson worth learning whether you go to four days or not.