Analysis · Daily index
UK Energy Cost of Sales Index
Every day we track what a typical UK energy tariff actually costs to buy and deliver to a home, if a supplier locked in the price today, before they add overheads and margin. It’s the biggest part of any tariff, about 90% of it.
Cost of sales · 1Y fixed dual fuel · GB avg
© EnergyCode™ 2026
Cost of sales
£1,826 /yr
medium consumption · ex VAT
Headroom vs cap
£144
over cap · 8.6%
Lowest fix vs cap
£93
over cap · 5.5%
Day on day
▼ −£14
-0.8%
Week on week
▲ +£116
6.8%
YTD 2026
▲ +£805
78.8%
Cost of sales · by network
Where the 14 GB networks sit this week
At medium consumption, cost of sales is £1,826/yr, up £805 year to date. It’s lowest in East Midlands at £1,770/yr and highest in Manweb at £1,901/yr. The table below breaks down all 14, sortable by any column.
Showing medium band·2,500 elec · 9,500 gas kWh/yr
| Region | YoY | |||||
|---|---|---|---|---|---|---|
East Midlands NGED | £1,770 | ▲ £115 | ▲ £254 | ▲ £253 | ▲ £797 | —soon |
London UKPN | £1,801 | ▲ £115 | ▲ £255 | ▲ £254 | ▲ £802 | —soon |
West Midlands NGED | £1,803 | ▲ £115 | ▲ £254 | ▲ £253 | ▲ £802 | —soon |
Eastern UKPN | £1,804 | ▲ £116 | ▲ £256 | ▲ £255 | ▲ £805 | —soon |
Norweb ENWL | £1,810 | ▲ £115 | ▲ £256 | ▲ £257 | ▲ £814 | —soon |
Southern SSEN | £1,818 | ▲ £114 | ▲ £253 | ▲ £252 | ▲ £799 | —soon |
Northern NPg | £1,831 | ▲ £115 | ▲ £255 | ▲ £254 | ▲ £803 | —soon |
| GB average | £1,826 | ▲ £116 | ▲ £256 | ▲ £255 | ▲ £805 | —soon |
South Eastern UKPN | £1,835 | ▲ £115 | ▲ £255 | ▲ £254 | ▲ £809 | —soon |
Scottish Hydro SSEN | £1,836 | ▲ £115 | ▲ £254 | ▲ £255 | ▲ £801 | —soon |
Scottish Power SPEN | £1,837 | ▲ £116 | ▲ £258 | ▲ £257 | ▲ £813 | —soon |
South Wales NGED | £1,837 | ▲ £115 | ▲ £254 | ▲ £254 | ▲ £800 | —soon |
South West NGED | £1,837 | ▲ £113 | ▲ £252 | ▲ £252 | ▲ £797 | —soon |
Yorkshire NPg | £1,838 | ▲ £117 | ▲ £259 | ▲ £257 | ▲ £812 | —soon |
Manweb SPEN | £1,901 | ▲ £116 | ▲ £258 | ▲ £257 | ▲ £808 | —soon |
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The engine behind the number
Everything on this page is one output of the EnergyCode Pricing Engine. It runs on the full GB cost stack, DNO charging statements, Ofgem caps, NESO and Elexon data and the energy codes themselves, so suppliers, brokers and large consumers can build and price a whole tariff region by region, every cost sourced and dated, right down to the unit rate and standing charge.
About this report
Latest article: Cost of Sales Index: September 2026
- Tariff term
- 1-year fixed, dual-fuel domestic tariff. Modelled as locking in on the first of the subsequent month for the following 12 months.
- What “cost of sales” means
- What it costs to deliver a year of energy, built bottom-up from the published components: wholesale, network charges, policy levies and published operating items like the Smart DCC metering charge. Excludes supplier overheads, customer acquisition, margin and VAT. It also excludes Warm Home Discount.
- Updated
- The headline figure is refreshed every day with the latest market data; the chart shows the weekly trend. GB average with a per-DNO regional table. £/year, ex VAT. From 1 July 2026 we use Ofgem’s revised Typical Domestic Consumption Values (medium 2,500 kWh Elec, 9,500 kWh gas) and rebased the whole history to them, so figures sit below earlier readings.
Sources & attribution
Figures are EnergyCode-derived analysis. You may reference or reproduce them in editorial, research or internal work without prior consent, provided you attribute EnergyCode and link to www.energycode.ai/tools/tracker. For commentary, methodology questions or data access, media enquiries can be sent to hello@energycode.ai. The “Lowest market fix” line is the exception: an external benchmark, not our analysis. It tracks the lowest fixed dual-fuel deal on the market, taken from Ofgem’s Retail Market Indicators and leading comparison sites such as Uswitch or MoneySavingExpert. It is quoted at medium consumption and shown on the medium view only. Shown for context only.
Disclaimer
The figures represent EnergyCode’s analytical view of the cost of sales for a representative tariff on the date shown. Wholesale prices move daily; this is a snapshot, not a forecast. The report is provided for informational purposes and does not constitute advice. EnergyCode accepts no liability for decisions taken on the basis of this information. The “Lowest market fix” line is an external point-in-time benchmark of the lowest fixed dual-fuel deal on the market for typical direct-debit consumption, taken from Ofgem’s Retail Market Indicators and leading comparison sites such as Uswitch or MoneySavingExpert. It is not an offer or recommendation.