Answer: surcharge

AnswerCrossword Clue
SURCHARGEBill add-on
SURCHARGEExtra fee
SURCHARGEExtra fee, as for a special service
surchargeA charge made by assessors as a penalty for false returns of taxable property
surchargeAn additional charge or payment
surchargeA mark printed on a postage stamp changing its value
surchargeThe showing of an omission in an account for which credit should have been given
surchargean additional charge / to exact a surcharge from; to overload