A system includes one or more memory devices storing instructions, and one or more processors configured to execute the instructions to perform steps of a method providing sensor-based authentication of customers. The system may detect customer biometric data associated with an unknown customer present at a merchant location. The system may determine, based on a known customer identification profile and the detected customer biometric data, a confidence level that the unknown customer is the same individual as the known customer and authenticate the unknown customer based on a determination that the confidence level exceeds a predetermined threshold. The system may transmit identification information associated with the known customer to a financial service provider and receive payment credentials of one or more accounts associated with the known customer and authorization to utilize the one or more accounts to perform a financial transaction.