Sourced fact
Metered charging electricity is multiplied by the selected unit rate.
Regulation · GB
Home EV charging cost formula
Use metered charging kWh multiplied by the dated unit rate. If you start with battery-added kWh, enter charging loss explicitly before applying the rate. Add a standing charge only when it is an incremental cost caused by the charging scenario.
Ofgem: Price cap unit rates and standing charges
Reviewed
Key facts and evidence
Within the UK, this page covers Great Britain as of 13 August 2026. The conclusion is that home-charging cost should expose energy, loss, tariff and any incremental standing charge as separate inputs. The E2 rate period is 2026-07-01 to 2026-09-30, and the result does not predict prices outside that period.
Ofgem: Price cap unit rates and standing charges
Sourced fact
The selectable Ofgem rows are effective from 2026-07-01 to 2026-09-30.
Sourced fact
Charging loss and incremental standing-charge treatment remain visible user inputs.
Calculate a Great Britain home-charging electricity cost from explicit energy, loss, tariff and standing-charge inputs.
Input × formula × dated rate
Input: metered home-charging kWh. Formula: input kWh × selected unit rate, plus incremental charged days × selected standing charge only when applicable. Dated rate: the matching Ofgem single-rate region and payment-method row, VAT included. Every displayed money result must expand to these fields.
E2 effective period
The current E2 Ofgem matrix is effective from 2026-07-01 to 2026-09-30. It is a dated default-tariff benchmark for single-rate electricity, so the calculator must withdraw these rows after review expiry and must not use them as a forecast.
What to do next
Use this page only to structure a cost estimate from a current tariff and your own energy inputs.
Immediate action: Select the correct region, payment method and dated rate before calculating.
- Stop the calculation if the tariff period, region, payment method or VAT basis cannot be confirmed.
Professional hand-off
- Ask your electricity supplier to confirm the current tariff row and VAT basis if your bill is unclear.
Questions this record can answer
What does the sourced evidence say about input × formula × dated rate?
Input: metered home-charging kWh. Formula: input kWh × selected unit rate, plus incremental charged days × selected standing charge only when applicable. Dated rate: the matching Ofgem single-rate region and payment-method row, VAT included. Every displayed money result must expand to these fields.
What does the sourced evidence say about e2 effective period?
The current E2 Ofgem matrix is effective from 2026-07-01 to 2026-09-30. It is a dated default-tariff benchmark for single-rate electricity, so the calculator must withdraw these rows after review expiry and must not use them as a forecast.