incidental expense

Thesaurus

Noun

1.

incidental expense - (frequently plural) an expense not budgeted or not specified; "he requested reimbursement of $7 for incidental expenses"incidental, minor expenseplural, plural form - the form of a word that is used to denote more than oneexpense - money spent to perform work and usually reimbursed by an employer; "he kept a careful record of his expenses at the meeting"