A method, system, and article of manufacture for defining and managing time-based organization hierarchies are disclosed herein. In one embodiment, a user interface, including a plurality of user interface displays configured to receive a user input to define and/or manage one or more instances of a time-based organization hierarchy, may be generated on a client. The user may then define, via interaction with the user interface, the at least one instance of the organization hierarchy to include a plurality of nodes, and specify an effective period for the instance of the time-based organization hierarchy by defining a start date and an end date. The user may also define a territory to correspond to each of the plurality of nodes in the organization hierarchy. In one embodiment, the territory may include at least one position and an assignment rule, the position having a corresponding quota.