Embodiments of the invention provide methods and systems for performing a payment transaction. A method for performing a payment transaction may include receiving purchase information from a merchant and associating the purchase information with an identifier. The method may also include transmitting the identifier to the merchant and receiving the identifier from a wireless device of a customer. The wireless device may obtain the identifier by receiving a code from a merchant device and by interpreting the code. The method may additionally include associating the identifier with the purchasing information, determining a payment account associated with the customer, transmitting a request to a payment service provider system to provide funds for the payment transaction, and receiving an authorization from the payment service provider system to provide the funds. The method may additionally include transmitting a confirmation of the authorization to the merchant.