Breaking down your bill

Energy bills can sometimes seem complex, and it’s not always clear what consumers are paying for. Here you can find out how much of your bill goes towards the cost of running the Electricity Transmission network, and how that cost breaks down.

Breaking down your electricity bill

The Electricity Transmission part of your bill, which is subject to approval by the energy regulator, Ofgem, covers the cost of building and maintaining the network. Our transmission network cost in 2020/2021 was £20 of the average annual household bill of £612 – that’s around 3.3% of your total annual bill.

ET costs

*We use Ofgem’s methodology to report the impact of our charges. The figures quoted are based on 2020/2021.



How the £20 cost breaks down

The £20 of National Grid costs can be broken down as follows:

ET breakdown infographic bill

**When we invest in the network, the cost is spread so consumers pay over the life of the asset. This portion relates to past investment.

Electricity pylon

Download our guide to understanding your bill

You can view or download our guide that explains how the electricity transmission portion of your bill is calculated.

The guide also describes how our costs break down, how they’re affected by regulation, how our revenue is collected, and how we’ve worked out the amount that’s included in householders’ bills.

Download the guide