Study: 61 UK firms tried a 4-day workweek and after a year, they still love it
A UK trial where dozens of companies shifted to a 32‑hour, four‑day workweek without cutting pay prompted debate over whether similar models can scale beyond a small, self-selecting group of employers. Many see clear gains in well‑being, retention and per‑hour productivity, but worry that firms will use shorter weeks to justify lower wages, that global competition and tight margins in non‑tech sectors limit feasibility, and that power imbalances mean data alone won’t drive change. Others question the robustness of existing research and argue that any move to shorter weeks ultimately reflects political choices, labor organization, and cultural norms as much as economics.
What “4-Day Workweek” Means
- Many clarify that the target is ~32 hours over 4 days with no salary cut, not compressing 40 hours into 4×10-hour days.
- Others note that in practice there is wide variation: 4×9h, 80% contracts, or “ROWE”-style models focused on outputs rather than hours.
Productivity, Focus, and Human Limits
- Repeated claim: knowledge workers cannot sustain deep, high‑quality work for 8 hours a day, 5 days a week; much of the current 40h week is low‑intensity time or slack.
- Advocates argue the same (or nearly the same) total output can be delivered in 32h via better prioritization, fewer meetings, and reduced burnout.
- Skeptics ask: if 32h really equals 40h, why hasn’t this already become the norm, and why don’t companies universally adopt it to outcompete rivals?
Management, Control, and Remote Work
- Several see C‑suite resistance as driven by desire for control and in‑person culture, not data on productivity; RTO mandates are cited as analogous.
- One contrarian view: 4-day weeks can be used as a carrot to force people back into offices rather than allow full remote.
Economics, Pay, and Competition
- Fear that 4 days will be used to justify 20% pay cuts, especially where labor supply is high.
- Others counter that if output per week is unchanged, pay should not fall; market forces will set compensation relative to the new norm.
- Concerns that universal 4-day adoption could hurt competitiveness in manufacturing or lower-income countries, where work is less “slack‑filled.”
Unions, Policy, and Demographics
- Some argue legal standards and unions are needed, as with the historic shift from 6 to 5 days.
- Aging populations and tight labor markets are cited as forces that may push employers toward shorter weeks to attract and retain staff.
Evidence and Methodological Skepticism
- Multiple commenters criticize the cited research as non-randomized, with heavy attrition, self‑selection, weak controls, and advocacy bias.
- They stress that current trials show promise but do not yet provide clean causal evidence.
Alternative Schedules and Personal Anecdotes
- Many report thriving on 3‑day or 4‑day weeks at reduced pay, or 5×6‑hour days.
- Common theme: extra non‑work time is seen as worth substantial income trade‑offs for those who can afford it.