Estimate your annual, monthly and daily gas + electricity costs using your own kWh usage, unit rates and standing charges. The default tariff uses the average Ofgem price cap for direct debit customers from 1 April to 30 June 2026, so you can sense-check a quoted tariff or compare it with a typical capped bill.
Enter 0 for gas if your home is electric-only, or switch to a usage preset for a quick estimate. This is a planning tool, so actual bills can differ by region, meter type, payment method and tariff structure.
| Part | Input | Annual cost |
|---|---|---|
| Electricity | — | — |
| Gas | — | — |
| Standing charges | — | — |
Defaults use the average direct debit price cap from 1 April to 30 June 2026: electricity 24.7p/kWh + 54.7p/day, gas 5.7p/kWh + 35.1p/day.
Tip: if you know your annual kWh from a bill statement, leave the rates in place and update the usage first.