Energy Bill Calculator UK 2025
Calculate your annual gas and electricity bill from your unit rates and usage, see how you compare to Ofgem’s typical household figures, and find out how much you could save by reducing consumption or switching tariff.
Ofgem price cap 2025
The Ofgem energy price cap sets the maximum unit rates and standing charges that suppliers can charge on default tariffs. From April 2025 (Q2), the cap for a typical household is £1,849/year — down from £1,928 in Q1 2025. The cap is based on a typical household using 2,700 kWh of electricity and 11,500 kWh of gas per year.
The price cap doesn’t limit your total bill — it limits the rates per unit. If you use more than the typical household, your bill will be higher even under the cap. Smart meters and direct debits typically attract the lowest rates under capped tariffs.
Switching to a smart meter (free from your supplier) helps track usage accurately. Insulating your loft (£300–600, 25-year payback) is the highest-ROI home improvement for most homes. Turning your thermostat down by 1°C saves roughly £145/year. LED bulbs, draught-proofing, and washing at 30°C are lower cost actions. Heat pumps and solar panels offer bigger savings but require significant upfront investment.
