UK Energy Bill Calculator — Free 2026
Estimate your annual gas and electricity costs using the latest Ofgem price cap rates. See how your usage compares to the typical UK household.
How It Works
- Enter your usage
- Select the price cap period
- Review your estimated bill
Understanding UK Energy Bills in 2026
Energy costs remain a major household expense in the UK. The Ofgem energy price cap, updated quarterly, sets the maximum amount suppliers can charge per unit of energy for customers on default tariffs. Understanding how the cap works and how your usage compares to the average can help you budget effectively and find savings.
How the Ofgem Price Cap Works
The price cap sets maximum unit rates (per kWh) and standing charges (daily fixed fees) that energy suppliers can charge on their default tariffs. It is not a cap on your total bill — if you use more energy than the typical household, you will pay more than the headline cap figure. The cap is reviewed every quarter by Ofgem based on wholesale energy costs, network charges, and supplier operating costs.
Q3 2026 Price Cap (July – September)
From 1 July 2026, the Ofgem price cap is £1,663 per year for a typical dual-fuel household paying by direct debit — up from £1,641 in Q2 2026. Key rates for Q3 2026:
| Component | Electricity | Gas |
|---|---|---|
| Unit Rate (p/kWh) | 26.11p | 7.33p |
| Standing Charge (p/day) | 57.19p | 29.04p |
All rates include 5% VAT. Actual rates vary slightly by region across England, Scotland and Wales.
Why the Headline Cap Barely Moved Despite a 13% Rate Rise
Alongside the July rate change, Ofgem also updated its Typical Domestic Consumption Values (TDCV) — the assumed annual usage figures it uses to calculate the "typical household" headline number — lowering them from 2,700 to 2,500 kWh of electricity and from 11,500 to 9,500 kWh of gas, to reflect that households are actually using roughly 7% less electricity and 17% less gas than the previous benchmark (set in 2023). Applied to the new, lower consumption figures, the same higher unit rates produce a cap of £1,663. Applied to the old consumption figures, they would have produced £1,862 — a 13% rise. Both numbers are correct; they simply use different assumed usage. Because your actual bill depends on unit rates × your real usage, not the headline figure, this calculator always uses the current unit rates above regardless of which "typical" figure is quoted elsewhere.
Tips to Reduce Your Energy Bills
- Compare fixed tariffs — some suppliers offer fixed deals below the price cap
- Improve insulation — loft and cavity wall insulation can save £100–£300/year
- Smart thermostat — reduce heating by 1°C to save roughly £80/year
- LED bulbs — use 80% less energy than traditional bulbs
- Warm Home Discount — eligible low-income households can get £150 off their bill
Sources: Ofgem — "Energy price cap will rise 13% from July" (Q3 2026 announcement); Ofgem — Energy price cap unit rates and standing charges.
Frequently Asked Questions
The Ofgem price cap from 1 July to 30 September 2026 is £1,663 per year for a typical dual-fuel household paying by direct debit, up from £1,641 in Q2 2026. Unit rates rose by around 13% compared with the old consumption benchmark, but Ofgem also lowered its "typical household" usage assumption on the same date, which limited the rise in the headline figure.
From July 2026, the average unit rates are 26.11p/kWh for electricity and 7.33p/kWh for gas (including 5% VAT). Standing charges are 57.19p/day for electricity and 29.04p/day for gas.
From 1 July 2026, Ofgem defines typical household consumption as 2,500 kWh of electricity and 9,500 kWh of gas per year — revised down from 2,700 and 11,500 kWh to reflect that households now use roughly 7% less electricity and 17% less gas than the 2023 benchmark. Actual usage varies significantly based on property size, insulation, number of occupants, and heating system.
Key ways to reduce energy bills include switching to a fixed tariff if cheaper than the cap, improving insulation, using a smart thermostat, switching to LED bulbs, washing at 30°C, and considering solar panels. The Warm Home Discount scheme provides £150 off for eligible low-income households.
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