A system and method for controlling financial transactions is disclosed. A customer, using a wireless device, identifies a point of sale and the amount of a transaction at that point of sale is first communicated to a central service and then transmitted to the wireless device for display at the wireless device. The customer can either accept the transaction amount to complete the transaction or reject the amount to cancel the transaction. The customer may have to enter a password or personal identification number to verify the authorization to use the wireless financial system. The customer is billed for the transaction via credit, debit, ATM or other methods, such as the wireless carrier or an internet provider.