UK energy price cap rates

Unit rates vary by region because energy reaches your home through one of 14 separate distribution networks, each operated by a different company. Those companies charge energy suppliers different amounts to use their infrastructure. Suppliers pass those network costs on through the unit rates and standing charges on your bill.

The differences are not dramatic, typically a few pence per kWh between the cheapest and most expensive regions, but they add up over a full year. The gap between the East Midlands (the cheapest electricity region at 25.10p per kWh under the July 2026 cap) and N Wales and Mersey (the most expensive at 27.66p per kWh) is 2.56p per kWh. On typical annual consumption of 2,500 kWh electricity under Ofgem's updated assumptions, that difference is about £64 per year. The headline typical dual fuel bill is £1,663 on the new basis (£1,862 under previous assumptions).

Your region is determined by your postcode, not your choice of supplier. Every supplier serving your address charges within the same regional cap rates. Entering your postcode in the lookup above identifies your exact distribution network region and shows the rates that apply to your address.