A data transmission cap represents a maximum amount of data that can be transmitted to and/or from a communication device during a subscriber billing cycle without incurring a penalty under a subscriber rate plan. To limit data transmission to and/or from the communication device as the data transmission cap is approached, a graphical user interface (GUI) is displayed. The GUI includes one or more GUI controls for selecting a data transmission limiting tactic from a plurality of distinct data transmission limiting tactics and for specifying a data transmission threshold at which the selected tactic is to take effect, the threshold being below the operative cap. Upon user interaction with the GUI control(s), user input indicating the selected data transmission tactic and specified data transmission threshold is received. The communication device or another electronic device in communication therewith is configured to effect the selected data transmission limiting tactic when the specified data transmission threshold is reached.