Contingent fee
（重定向自Contingency fee）
A contingent fee (in the United States) or conditional fee (in England and Wales) is any fee for services provided where the fee is payable only if there is a favourable result. Although such a fee may be used in many fields, it is particularly well associated with legal practice. In the law, it is defined as a "fee charged for a lawyer's services only if the lawsuit is successful or is favorably settled out of court.... Contingent fees are usually calculated as a percentage of the client's net recovery."