Work more that 40 hrs ?

Do you and why ? I read an article online about making extra money this guy wanted to retire early. So he was saying about how he was making extra money by doing things in his spare time. Cus he said most ppl don't work more than 40 hrs. I do it's mandatory where I work plus it's what I need to do my work don't pay well so the overtime is a must.

So the question is do you work overtime and why. For me it's mandatory both Financial and work demands it.