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Billing period refers to the service dates between meter reads. In other words, the day when your meter was read marks the end of a billing period and the beginning of a new billing period. A billing period typically ranges from 27 to 33 calendar days.Your account number is unique to your premise. If you are a National Grid customer with multiple premises, each premise has its own unique account number. Treat your account number as confidential information.This is the dollar($) amount owed to National Grid. What are my payment options?This section shares important about your account, e.g. payment received, budget plan amount recalculations etc. Click here to view your account and enable notifications.If you have any unpaid charges, it will be added to your new balance - which will be reflected in this section of your bill.This is your charge for the current billing period.This reflects the total dollar($) amount that is owed. If you don't have an unpaid charge from a previous billing period, the dollar($) amount reflected here will be the same as your "Current Charges".This section gives a detailed breakdown of your "Delivery" charge plus your "Supply" charges. To understand how Delivery and Supply works, click here.The number of days within your service period can affect your current charge. Also, the weather/temperature can affect your bill amount. Your total usage is the number of kilowatt-hours used between your "previous meter reading" and "current meter reading".This is not the dollar($) amount owed to National Grid. This is just a portion of your current charges.This chart shows your usage in the past year. Each alphabet indicated the 1st letter of the month. Example: "N" = November, 2018 "O" = October, 2019This is your average daily energy consumption and cost.An Actual or Estimated Read is based on our ability or inability to obtain a read off of your meter. Estimated read is based off of the average usage for the same period last year. How can I read my meter?