Abstract: An exemplary device for allocating transactions across a plurality of sources includes a screen, a memory storing instructions, and a processor configured to execute the instructions to perform operations including: displaying on the screen an interface for a multi-source payment account profile; generating a first window in the interface indicating at least one characteristic of transactions and listing a plurality of potential payment sources available to include in a default allocation of funds settings, the default allocation settings including at least one relative percentage at which the listed payment sources are used to fund transactions; receiving a first user operation adjusting the relative percentages; transmitting the adjusted relative percentages to a server over a communication network; receiving from the server information regarding an approved transaction; and switching the first window to a second window identifying the approved transaction and approved allocation of funds for the approved t