A method, system, and computer readable storage medium for open access transmission tariff management for a utility. The system includes a database for storing a plurality of data pertaining to providing transmission service to wholesale customers, and a computer processor coupled to the database and cooperative with a plurality of subsystems. A first subsystem determines a budget transmission billing rate. A second subsystem estimates revenue from wholesale customers. A third subsystem determines an updated budget transmission billing rate and an updated revenue projection. A fourth subsystem determines an actual transmission billing rate. A fifth subsystem analyzes a billed transmission rate on a periodic basis.