Methods and systems for billing the use of a robot, including methods and systems for reducing a robot's functionality based on a user's account information. In some embodiments, the system comprises a computer readable memory comprising a database with a user's account information, a processor operably coupled to the computer readable memory and to a robot, a checking application stored on the computer readable memory and executable by the processor for determining if the user's account is active based on the account data and a functionality reducing application stored on the computer readable memory executable by the processor for reducing the robot's functionality to a reduced state if the checking application determines the user's account is not active and limiting the robot's functionality to the reduced state until the checking application determines that the user's account is active.