Provided are methods and systems for facilitating mobile device payments using codes and cashback business model. Upon installation of an application on a mobile device, a customer may specify his payment information, which may include data on a credit/debit card or a bank checking account. Once the payment information has been specified, the customer may receive a unique code encoding his payment information. The customer may then start scanning product barcodes with his mobile device. To make payment for products, the unique code displayed on a screen of the customer mobile device may be scanned by a payment receiver mobile device. The payment receiver mobile device may further display customer records stored in a database of a payment processing system. Based on the customer records, the customer may be provided with various cashback opportunities, as well as credits and discounts.