With the exception of a few weeks, I have been working 4 days a week, 32 hours, 80% time at 80% money for over six years now.
The core idea is that spare time is worth more to me than salary can make up for. A pile of money at 60 is not going to me buy back time I wish I had when I was younger — time that I could spend now.
When I started, one day off allowed me taking Spanish classes at working hours. If I'd need to explain why I let go of 20% the money, I'd list to do it to…
keep my battery charged and reduce risk of burnout,
have e.g. dentist appointments without taking time off or stressing myself about being back in time,
work on free software and get personal todos done outside the weekend, and
spend more time on learning new things.
Which of these benefits are in the interest of my employer?
All of them.
Disagree? Have something to add? Drop me a mail at firstname.lastname@example.org.