GB: dual fuel bill cost breakdown 2020

Wholesale costs account for the greatest share of the final dual fuel bill in Great Britain. As of 2020, wholesale costs made up nearly 35 percent of the end costs. Environmental and social obligation costs contributed roughly 15 percent of the dual fuel bill, with its shares having increased over the years. Dual fuel bills refer to bills from providers of both electricity and gas.

Breakdown of costs for a dual fuel energy bill in Great Britain in 2020

Characteristic	Share of total costs
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Release date

August 2021

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Region

United Kingdom (Great Britain)

Survey time period

2020

Supplementary notes

The source notes that this data is an estimate of the costs in a dual fuel bill of an average domestic customer of the large suppliers. Because it is based on the total costs and customer numbers reported by suppliers irrespective of their tariff type, the bill breakdown for gas will reflect a mixture of the costs of serving gas to dual fuel and single fuel customers, and the same also applies to electricity.

Figures relate to the suppliers' financial years. Five of the companies (British Gas, EDF, E.ON, npower and ScottishPower) have financial years ending in December, whereas SSE’s financial year runs from April to March.

Following OVO’s acquisition of SSE’s domestic supply business, the average domestic dual fuel bill for 2020 does not include OVO/SSE’s data.

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