PLEASE NOTE: If you are on the Fixed Price Option and decide to switch to a competitive supplier in the middle of a pricing period (currently 12 months for residential customers and 6 months for commercial customers), you will receive a billing adjustment, which will be either a credit or a charge. The billing adjustment compares your Standard Offer Service charges on the Fixed Price Option to what you would have been charged under the Variable Price Option; as a Commercial customer, this is equivalent to the monthly prices National Grid contracts with its Standard Offer Service suppliers. We apply this adjustment to ensure that all Standard Offer Service customers are billed for the actual cost of Standard Offer Service electricity they consume. The calculation uses the monthly rates under the Variable Price Option because they represent our monthly cost of supplying Standard Offer Service to you for the months before you left Standard Offer Service. This Standard Offer Service billing adjustment, referred to as a Standard Offer Billing Adjustment when it appears on your bill, may be a credit or a charge depending on when you leave Standard Offer Service during the pricing period, and is reflected on your bill prior to when your switch to a competitive supplier is effective. To learn more about this adjustment see Standard Offer Service Billing Adjustment.

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