This paper introduces the concept of using IoT and RFID Tag based technology in automobile parking services in cities. A high-level view of the projected system is outlined. Our answer makes the older parking system smarter by leveraging the facility of IoT and embedding it with the newest innovation of electronic sensors computers. AN IoT-based intelligent automobile parking system is described. In this paper proposed system that helps users automatically check free car parking slots at the smallest amount of time. Supported new performance metrics to calculate the userparking Cost by considering the gap and also the total number of free places in every parking area. This cost will be used to offer a solution of adding an available parking space upon a request by the user and a solution of suggesting a new car park if the current car park is full. The simulation results show that the algorithm helps improve the probability of successful parking and minimizes the user waiting time