Understanding My Electric Bill We want to help make it easier to understand what you're paying for each month. Learn more about the charges on your electric bill, see a sample bill and access the latest rates. Sample Electric Bill Review a sample electric bill to better understand the format. Understanding Supply and Delivery Charges Your Eversource electric bill is made up of two charges—supply and delivery. Here's what they mean. Supply Rates Supply rates change twice each year—on January 1 and July 1. See the latest rates and learn more. Delivery Rates There is a unique rate for each component of the delivery charge on your bill. See the latest rates and learn more.