A proximity-based order processing system provides a way for a customer of a restaurant or other retail establishment to set up a default order for food or other goods or services via a web page interface. The customer is issued a portable wireless communication device, such as an active RFID device, having an order-confirmation button. If the button is pressed while the portable unit is in range of a reader unit in the retail establishment, the portable unit transmits an order confirmation signal to the reader unit. Upon receipt of the order confirmation signal, a order handling computer system confirms that a default order on file for the customer and sufficient funds are available in the user's monetary account. If the default order is on file and the funds are sufficient, the customer's order is processed and made ready for pickup. In this manner, the customer need not stand in line to wait to place or pay for an order.