15 Companies Tried a 4-Day Week and Rated It 8.5/10 — What It Means for Burned-Out Devs

The four-day week keeps refusing to fail. New Australian research this month found that companies which switched didn’t just cope with one less day, they mostly got more done, scored the change 8.5 out of 10, and almost none of them went back. Dubai just reinstated a four-day week for government staff over the summer, and trial after trial keeps landing in the same spot. What used to sound like a perk is starting to look like an operating model.

What happened

A study led by Professor John L. Hopkins at Deakin University, published May 20, followed 15 Australian companies across logistics, property management, healthcare, and publishing. Half were tiny (2 to 18 people), half mid-sized (up to 85). All ran the “100:80:100” deal: keep 100% of your pay, work 80% of the hours, still deliver 100% of the output.

The results came out lopsided:

• 14 of the 15 firms kept the four-day week after the trial ended.
• Six said productivity actually went up. The other nine said it held steady.
• Not one reported a drop.
• Employers gave it an average of 8.5 out of 10.

Wellbeing wasn’t a side benefit here, it was the point. Six of the companies said cutting burnout was their main reason for trying it. One executive described measuring success by watching attrition, absenteeism, and how many people were taking mental health days “because they’re burnt out.”

Bigger programs tell the same story. Across 4 Day Week Global’s trials, around 95% of participating businesses chose to keep going, with employees reporting less burnout and fewer sick days.

Why it matters

The argument has quietly flipped. It used to be “can output survive fewer hours?” The evidence now says yes, and the more interesting question is why. When time gets scarce, low-value work is the first thing to go: the meeting that should have been a message, the half-awake afternoon, the busywork that exists mostly because a fifth day exists to fill.

Six of 15 companies reported productivity went up and none reported a decline, with an average rating of 8.5 out of 10. — Deakin University study, 2026

For people whose work runs on focus rather than hours logged, that’s the whole game. Fewer hours force a hard conversation about what actually moves the work forward.

What this means for developers

Most developers don’t get to vote their company onto a four-day week. But the thing that makes it work is portable, and you can borrow it now:

• Find your own fifth-day work. What fills your least useful hours? Status meetings, waiting on reviews, flipping between tabs. The four-day week works by deleting that, so go delete your version of it.
• Protect one real deep-work block. The trials show concentrated output beats hours smeared across a long day. A single meeting-free block usually out-ships a fragmented one.
• Treat rest as part of the machine. Burnout was the top reason these firms tried this, and output held or rose once people recovered. Days off aren’t the opposite of shipping. They’re what keeps you shipping.

The bottom line

The four-day week’s record is getting hard to argue with: less burnout, output that holds or climbs, and almost nobody who tries it wanting to go back. Whether or not your company ever adopts it, the lesson travels. Guard your focus, cut the filler, and stop treating exhaustion as the cost of doing the job. Turns out you can work less and ship more.