non-refundable

(also nonrefundable)

adjective

Definition

› FINANCE used to describe money that you pay that you cannot get back: non-refundable deposit/fee/down-payment At this point, the purchaser will have to pay a 10% non-refundable cash deposit to the auctioneer.

› COMMERCE used to describe something that you cannot return after you have bought it: The check-in desks close 40 minutes prior to departure, so if you're late, you're stuck with a nonrefundable ticket.

(Definition of non-refundable adjective from the Cambridge Business English Dictionary © Cambridge University Press)