An automatic billing and cardholder profile updater (ABCPU) computing device is provided. The ABCPU computing device receives an update request including an account identifier and associated with a candidate payment account over a first network, retrieves billing data associated with the candidate payment account from a billing database that stores billing data associated with a plurality of payment accounts, generates a card profile query including the account identifier, transmits the card profile query over a second network separate from the first network, receives card profile data associated with the candidate payment account from a card profile database that stores card profile data associated with a plurality of payment accounts, generates an update response including the retrieved billing data and the received card profile data, and transmits the update response over the first network to at least one of an acquirer and a merchant associated with the update request.