Mobile decoupled payments account systems and computer-implemented methods provide a decoupled mobile payments account and processing for payments made with a decoupled mobile payments account. A demand deposit account of an accountholder is associated with a decoupled mobile payments account that enables a mobile device to be used in making proximity or remote payments. Embodiments include mobile decoupled payments accounts based upon open or closed loop processing networks and mobile decoupled payments accounts that are ACH-direct accounts. An issuer of the mobile decoupled payments account authorizes or declines transactions and, for approved transactions, initiates an ACH transaction to obtain funds corresponding to an approved purchase transaction from the demand deposit account of the accountholder. Embodiments include person-to-person mobile payments and merchant-specific gifts and prioritized selection of accounts associated with a decoupled mobile payments account for processing a purchase transaction made with a mobile device.