Aspects of the subject matter described herein relate to processing payment requests. In aspects, a user of an online system is allowed to pay for goods or services using a combination or one or more payment types including credit card, cash card, gift certificate, purchase order, money order, other payment types, and the like. A payment router determines which payment processor(s) needs to be involved to satisfy each payment request and routes payment requests to each payment processor as needed. Adding new payment methods and changing existing payment methods may be accomplished by changing a table or the like that associates payment methods with payment processors.