I've had to do it, and always loathed it. In my current job it's also a thing, and I try to be honest. That also means writing the hours I need to write hours

I've had to do it, and always loathed it. In my current job it's also a thing, and I try to be honest. That also means writing the hours I need to write hours (and other stuff, like checking the intranet for news). In a previous job I had the situation where each project manager would approve my hours individually, and none of them were willing to accept any overhead. I was doing 5 projects at the same time. That lead to burnout on my part. Now I have only one fulltime project and some side gigs (coaching a junior developer).