Fixed bid gives you a greater incentive to be efficient in my experience. If you're significantly quicker than your peers (e.g., have your own processes, framew

Fixed bid gives you a greater incentive to be efficient in my experience. If you're significantly quicker than your peers (e.g., have your own processes, frameworks, macros, etc.) then you can have large margins and happy clients if you can estimate decently. Another reason: you only have so many billable hours.