The present disclosure relates to systems, methods, and devices for sending and receiving payments using an integrated payment and messaging system. In particular, the integrated payment and messaging system allows users to send and receive electronic payments as well as exchange messages. For example, one or more implementations involve facilitating same day push-to-debit payment transactions between a user and a co-user. To illustrate, one or more implementations involve sending a push-to-debit request to credit funds for the payment amount of the payment transaction to a debit card of a co-user, the push-to-debit request being formatted for same day processing.