The present disclosure relates to an account system for optimizing transactions for a user. In one implementation, the system may include at least one processor and a storage medium storing instructions that, when executed, configure the at least one processor to perform operations. The operations may include receiving, from the merchant system, merchant information for the transaction, retrieving, based on the account number, a database record from a database, the database record comprising the plurality of financial accounts associated with the user and user preferences, determining financial account data associated with each of the plurality of financial accounts, determining, using an optimization algorithm, a preferred financial account from the plurality of financial accounts based on the financial account data, the user preferences, and the merchant information, and selecting, based on the determination, the preferred financial account to complete the transaction.