Abstract: A method and a system of managing utility cost of an entity are disclosed. The method and system include the functionality of measuring utility usage of the entity during a defined time interval and obtaining unit utility pricing information that is established during the coincident time interval. The method and system also matches the utility usage in a defined time interval with the utility per unit price in the same time interval for the purpose of calculating the utility cost in that time interval as well as the running total of the utility cost. Specifically, the running total is the sum of the utility costs measured for each time interval over a number of time intervals occurring during the day. The method and system further include capabilities of affecting the utility consumption of the entity based on the utility cost as measured in an interval as well as the running total utility cost.