If this was the main reason, then surely it would only be a matter of negotiation on salary? Out of experience I can tell you that this is not the case, most co

If this was the main reason, then surely it would only be a matter of negotiation on salary? Out of experience I can tell you that this is not the case, most companies won't even discuss it. I have asked for half time at a half dozen places, and actually got it at two (those that accepted were not pleased but they really had no choice as people with my skill set are hard to find). In my experience, the real reasons are (in order of importance): 1. It would hurt morale (or so they fear) 2. It complicates booking meetings and such 3. They suspect that you're doing something creative on your "other time" and thus they don't have your "full attention"