How much do you guys markup work done by sub-contractors? I read somewhere once that a suggested markup was 40%. I can't imagine I would ever get away with that. My sub-contractors don't give me much of a discount on their usual rates. So, for instance, if I give a bid for a big project that includes an addition to a concrete driveway and my concrete guy gives me a bid of $2,000, which is about the avg. market rate, then I go and mark that up 40%, then I am bidding that part of my project REALLY high. I am just curious what is normal. I really don't use subs very often. But sometimes it's unavoidable and when I do I typically don't mark up that part of the bid by more than 10%, for fear of losing the job.