费用通常是指某人或某团体为了获取物品或劳务而导致的现金流出，会计学上则是指现金或资产从某人或某公司移转至另一个人或公司。

Expenses redirects here. For the row about members' expenses in the UK Parliament which started about May 2009, see United Kingdom Parliamentary expenses scandal.

In common usage, an expense or expenditure is 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 is an expense. For students or parents, tuition is an expense. Buying food, clothing, furniture or an automobile is often referred to as an expense. An expense is a cost that is "paid" or "remitted", usually in exchange for something of value. Something that seems to cost a great deal is "expensive". Something that seems to cost little is "inexpensive". "Expenses of the table" are expenses of dining, refreshments, a feast, etc.