Additional cost of a product stemming from the buyer's unwillingness to do the legwork to find a better price. Example: I paid $85 dollars for those hubcaps, including a $45 impatience fee there, 'cuz I'm sure I could have found them somewhere else for $40.
IMPATIENCE FEE
Meaning of IMPATIENCE FEE in English
Slang English vocab. Английский сленговый словарь. 2012