mulct
noun
a sum of money to be paid as a punishment <the loan shark usually imposed a mulct of an additional 20% on overdue payments>
we call that a Vig in our lingo... banks ....bad credit banks... charge a fee to write a loan. they have different names for the fee. 'discount' or 'acquisition fee' or just 'bank fee' we all call it a Vig. Vig short for
Vigorish