Expedited transaction processing using a database of integrated in-store and online transactions is described. First transaction information associated with a first transaction conducted in a physical store of a merchant and second transaction information associated with a second transaction conducted via an online store of the merchant can be received. The first transaction can be processed based at least partly on the first transaction information and a record of the first transaction can be stored in the database. Based at least partly on the record, the second transaction can be processed using at least a portion of the second transaction information by (i) sending, to a card authorization service, the second payment information and (ii) generating an indication that the first payment information was authorized for the first transaction at the physical store. A computing device of the online store can be notified that the second transaction is allowed.