Systems and methods are provided for use in processing transactions based on biometric data used in connection with authenticating consumers to payment accounts to which the transactions are directed. One exemplary method includes causing a biometric associated with a consumer to be received, when the consumer presents a payment device for funding a transaction with a merchant via a payment account associated with the payment device. The method also includes appending, by a computing device, a biometric score to an authorization request associated with the transaction at the merchant where the biometric score is indicative of a degree of match between the received biometric and a reference biometric, and transmitting, by the computing device, the authorization request whereby an issuer associated with the payment account is able to utilize the biometric score in determining to approve or decline the transaction.