Managing multiple accounts in different bank accounts with varying ATM cards throws up several issues of security, convenience, and efficiency. Based on this reason, this work proposes a Smart ATM Card that integrates all different bank accounts on one card while eliminating the carry-on of other cards and ultimately improving the usage experience. These systems use advanced technologies of authentication and include fingerprint and RFID recognition merged with robust components such as Arduino Mega, GSM modules, and servo motors. This proposed architecture, with the introduction of multi-factor authentication, increases security to levels beyond the normal ATM systems. The system streamlines transaction processing and allows real-time alerts, thus improving convenience. In a detailed analysis of the system’s performance, security, and efficiency of transactions show great improvements. The advantage of multi-account consolidation and the application of advanced authentication techniques, as are present in the aforementioned existing solutions in ATM security, means that the proposed system is an innovative solution for future ATM operations.