A method may include receiving, by a charging function (CHF), a data usage monitoring request associated with use of an application, wherein the data usage monitoring request identifies a data usage threshold. The method may also include transmitting, by the CHF and to a session management function (SMF) or a user plane function (UPF), a message notifying the SMF or UPF of the data usage threshold. The method may further include receiving, from the SMF or UPF, a notification that the data usage threshold has been reached, and sending, by the CHF, a message to a network exposure function (NEF) indicating that the data usage threshold has been reached.