In traditional retail systems, manual billing systems lead to long queues and customer dissatisfaction. This study presents a solution to streamline the billing process and enhance the shopping experience using RFID technology and Arduino microcontrollers. The Smart Shopping Cart system integrates EM-18 RFID modules with Arduino to automate the billing process in supermarkets. Each product is tagged with an RFID tag, and carts are equipped with RFID readers. As customers scan items, prices are automatically added to the billing system, displayed on an LCD screen. This study aims to reduce wait times, errors, and operational costs associated with manual billing. This study includes design considerations such as circuit optimization, simulation using Proteus software, physical testing on breadboards, and calibration for accuracy. The use of rechargeable batteries ensures portability and minimizes clutter, enhancing the system's practicality. By embracing automation and RFID technology, this paper contributes to improving retail efficiency and customer satisfaction in modern supermarkets.