A computer system for managing a plurality of accounts, each the accounts being separated into a master account and at least one subaccount associated therewith, and at least one of the subaccount being a medical saving account (MSA). Each subaccount incorporates a subset of features available for the master account, the features corresponding to the specific needs dictated by the purpose of the subaccount. The purpose of a subaccount, in addition to being an MSA, can include regular payments (e.g., mortgage and other loans), credit/debit card, retirement account, and the like.