For 1 July to 30 September 2026, Ofgem's direct-debit averages for Great Britain are 26.11p/kWh plus 57.19p/day for electricity and 7.33p/kWh plus 29.04p/day for gas, including 5% VAT. Your regional values may differ.
The result is not a supplier bill or quote. Unit rates, standing charges, region, payment method, meter type, tariff, VAT, discounts, debt and support schemes can differ. Use values from the same tariff period and bill for a personal check.
Estimate capped energy costs
Defaults use the revised 2,500 kWh electricity and 9,500 kWh gas typical-consumption values, spread over a year. Rates are Great Britain direct-debit averages for 1 July–30 September 2026, VAT included.
The calculation runs in your browser. Values are not sent to the website.
How the calculation works
Cost = electricity kWh × electricity rate + electricity standing charge × days + gas kWh × gas rate + gas standing charge × days.
Unit-rate energy and daily standing charges are shown separately wherever possible. That prevents a misleading single pence-per-kWh figure.
Worked example in pounds
Ofgem published £1,862 using the previous typical-consumption values and £1,663 using the revised values effective from 1 July 2026. Neither is a maximum bill or a personal forecast.
The example checks the method. It is not a universal tariff or a forecast of your next bill.
What changes the result
The largest differences usually come from:
- region
- payment method
- meter and tariff
- actual kWh
- number of days
How to improve the estimate
Use rates for your region, payment method and meter, including VAT consistently. Match the number of days and do not add standing charges or discounts twice.
Use actual meter readings, separate electricity from gas and compare at least a year for weather-sensitive use. Keep debt repayments and account credit outside consumption cost.
Pre-filled figures are editable, dated reference values with a source.
Frequently asked questions
Will this match my energy bill?
Not necessarily. Regional rates, price changes inside a bill, meter estimates, tariff discounts, debt and rounding can differ.
Does the price cap limit my total bill?
No. It limits rates for covered default tariffs; total cost still rises with energy use.
Sources and review date
Content reviewed on: 2026-08-03.
- Ofgem – price cap rates, 1 July to 30 September 2026 — average unit rates, standing charges and regional tables
- Ofgem – July 2026 cap and revised typical consumption — £1,862 old TDCV and £1,663 revised TDCV
- Ofgem – price cap and standing charges explained — scope and variation