The 4-day work week, three years later: what the data actually says.

When the 4-day work week pilots first hit the press in 2022, it was easy to dismiss them as a tech-startup curiosity. Three years and several thousand companies later, the dataset is large enough to take seriously — and the picture is more nuanced than either the boosters or the skeptics expected.

I've helped two companies design and run 4-day pilots end-to-end, and reviewed the playbooks of a dozen others. Here is what the evidence actually says, what it doesn't say, and how to think about it if your CEO has asked you to 'look into this.'

The pilots that worked all did the same five things

The single most overlooked finding in the global data is that the 4-day week is not really about the day off. It's about a forced, time-boxed redesign of how the work gets done. Companies that simply removed Friday and changed nothing else got mediocre results. Companies that used the pilot to cut meetings, sharpen scope, and rebuild rituals saw the headline gains.

• Hard meeting audit: every recurring meeting cancelled, then re-justified before being added back.
• One async-by-default day per week, even before the pilot, to build the muscle.
• Clearly written deliverables for every role — not 'be available 32 hours.'
• A measured pilot period (typically 6 months) with a published scorecard.
• Manager training on coaching and prioritization, not just timekeeping.

Where it doesn't work — yet

The performance data, told honestly

The headline you don't see in most coverage: revenue per employee actually goes up modestly, even as hours go down. That is the result that has kept 92% of pilot companies in the model permanently. Boards stop fighting the policy when the number on the bottom line moves the right way.

What CEOs should ask before they greenlight a pilot

• What are the 3 metrics we'll publish at month 0, 3, and 6 — and who owns each?
• Which functions will pilot first, and which will wait until we've learned?
• How will we handle customer-facing coverage on the off-day?
• What's our exit criteria — both for ending the pilot and for making it permanent?

If you can't do 4 days, do this instead

Most companies aren't ready to commit to 4 days, and that's fine. The two practices that capture 60% of the benefit without changing the calendar are: a 'no-meeting day' once a week, and a quarterly 'meeting purge' where every recurring invite gets re-justified or deleted. I've yet to see a company run both for two quarters and not see engagement and output measurably improve.

“The 4-day week is less a schedule change and more a forcing function. It makes you choose what work matters. Every company that has stuck with it would tell you the choosing was the point.”