Once the payload has been selected, the payload subsystem can have varying roles depending on the type of the payload. However, one function is independent of the type of payload selected: [[Planning the mission and finalizing the Payload#Step 4: Document the rejected Payloads|Documentation of the rejected payload ideas]]. This is crucial for the future teams. The functions dependent on the type of the payload are listed below:

* If the team has selected a scientific payload, the payload subsystem is responsible for understanding the literature and laying down the foundation of the payload. The payload subsystem is responsible for bringing clarity within the team about the science behind the payload and establishing the theoretical feasibility of the concept and generating the relevant parameters for the rest of the subsystems

* If the team has selected a payload which requires a specific instrument, say a camera, then that instrument is the responsibility of the payload subsystem. Procuring it, calibrating it, testing it, interfacing it with the rest of the satellite, establishing that the instrument is suitable for the intended applications, developing and enforcing proper handling and storage practices for the instrument etc. are the responsibilities of the payload subsystem

* If the payload can fall under the purview of another subsystem, then the payload subsystem can be disintegrated post the selection of the payload and the members can be segregated in different subsystems. For instance, if the payload is the development of a repeater satellite, then the payload falls under the purview of the Communications Subsystem and hence the payload subsystem can be disintegrated.