If you're entering consulting expecting a 40 hour week, you're going to be very disappointed. At the very least, I'd plan on being in the office from 9am-7pm most days, and potentially much later if you're working on a client project. While you won't be working every weekend (this isn't banking, after all...), you may have to work the occasional weekend.Hours are pretty much the same at all the big players, although you'll definitely work longer hours in one of the strat houses than you will in the big operational consultancies.