non-refundable
From Longman Dictionary of Contemporary Englishnon-refundableˌnon-reˈfundable adjective a non-refundable amount of money cannot be paid back to you There is a £40 deposit, which is non-refundable.Examples from the Corpusnon-refundable• Fees are non-refundable and subject to change at the school's discretion.• Nothing for her troubles except a $ 15 non-refundable service charge on her Visa card.From Longman Business Dictionarynon-refundableˌnon-reˈfundable adjectiveCOMMERCE a non-refundable payment cannot be paid back to youA non-refundable deposit will be required in January.