RFID based toll plaza system using RF tag is scan valid or invalid and also when its swipe the card in EM-18 (RF tag reader module) then it reduce some amount of money from user card so that there is no need of man power to work there and also save time and traffic can get clear as fast in also we can recharge the card.all data is store in eeprom so there is update of money transaction.and Gate is open when valid card.