This fee is charged so that you can mentally tolerate the bullshit you must endure.
Can be a hidden or actual line item on the submitted job estimate. If used, disguise as "Management fee."
Use when prospects try to lowball you, who are over inquisitive about your business, who are control freaks, who have short tempers, who fail to respond in timely manner, who come ill prepared, who are always late, who are high maintenance, or other characteristics that make it difficult for you to conduct orderly business.
This buyer came 2 hours late and is making us drive her dog to the dog hotel before the contract signing? I'm sick and tired of his bullshit! Fuck dat, we gotta add 30% PITA or we're not taking this job!