Abstract: A method and system for providing a customer with guaranteed savings on its long-run energy charges as between a Utility and a Competitive Retailer. Preferably the method and system, including one or more computers with microprocessors for executing computer coded instructions, obtains and stores customer attributes, current energy provider, billing cycle and switching time constraints and restrictions and receives forecasted costs and prices of the Utility and the Competitive Retailer for the customer's next billing cycle. The system processes, via the computer, the customer data and the energy data for the Utility and Competitive Retailer to determine the energy provider projected to have the lower price for the next billing cycle of the customer. Preferably, the system requests a switch to the energy provider projected to have the lower price in that customer's next billing cycle, unless the customer is currently receiving service from the projected energy provider.