» Expenses redirects here. For the current row about members' expenses in the UK Parliament, see Disclosure of expenses of British Members of Parliament. In common usage, an expense or expenditure's an outflow of money to another person or group to pay for an item or service, or for a category of costs. For a tenant, rent's an expense. For students or parents, tuition's an expense. Buying food, clothing, furniture or an automobile's often referred to as an expense. An expense's a cost that's "p… (More on Expense)