Or if you really want to play the fixed price game, better add a _large_ buffer which you may keep should the project miraculously complete on time. You transfe

Or if you really want to play the fixed price game, better add a _large_ buffer which you may keep should the project miraculously complete on time. You transfer the risk from the client by doing fixed price work and risk is expensive. And of course, _every_ client change, goes through a process that evaluates it for additional cost that gets added to the bill. I think this change process is a considerable money earner for consultancies. But yeah, personally I always just charge a day rate.