An approach is provided for attributing energy usage to individual occupants in an area, such as a building or office space. The approach receives current locations of occupants from sensors deployed in the area being monitored. Identifiers corresponding to various occupants are determined, such as by tracking the occupants' mobile telephone location, biometrics such as facial recognition, or other device-enabled means of identifying people. Energy consumption values corresponding to energy consuming devices are received and device locations are identified. The approach further attributes the amount of energy consumed by each of the occupants, with the energy attribution being based on the occupants' current locations and the device locations.