The Four-Day Week Goes Mainstream

The four-day week has moved from a slogan to a policy that serious people argue about. The version being tested is not a compressed schedule with the same hours squeezed into four longer days. It is usually the 100-80-100 model: full pay, eighty percent of the time, and an agreement that output stays at one hundred percent. The trade is explicit — the company gives back a day only if the work still lands.

The biggest evidence so far comes from a British pilot in 2022. Sixty-one companies and roughly 2,900 employees ran a four-day week for six months, with researchers from Cambridge and Boston College tracking the results. Fifty-six of the sixty-one carried on afterwards, and eighteen made the change permanent. Revenue was reported to hold steady across the group, while burnout, sick days and resignations all fell.

Other countries have gone further than a single pilot. Iceland ran public-sector trials from 2015 to 2019 covering about one percent of its workforce, cutting the week to thirty-five or thirty-six hours without losing productivity; unions later won shorter hours for most Icelandic workers. Belgium gave employees the right to request four longer days in 2022, and Germany, Portugal and Spain have all funded trials since.

The companies that succeed rarely just delete a day. They attack the meeting calendar first, cutting recurring meetings and shortening whatever survives. Status updates move into writing. Teams protect long blocks of focused work and stagger the day off so that somebody always covers the client. In most reports the gain does not come from working faster; it comes from removing work that was never worth doing.

The objections are real. A four-day week is far easier in an office than in a hospital ward, a shop floor or a factory line, where output is tied to staffed hours and covering the fifth day means hiring. Some employees report the same workload pressed into less time, which trades one kind of exhaustion for another. A number of pilots have quietly reverted once demand rose again.

For managers, the useful question is not whether four days works in general. It is whether your team's results can be measured at all. If nobody can say what a good week of output looks like, cutting hours simply hides the problem. Start by defining two or three metrics, run a three-month trial with a stated review date, and agree in advance what result would end it.

If you want to raise this at work, do not pitch it as time off. Pitch it as an experiment with a cost, a metric and an exit. Try: "Could we trial one team on a four-day week for twelve weeks, hold delivery and response times flat, and review it in March?" Framed that way, you are asking a manager to test a hypothesis rather than to give something away.