HMRC EV rates
From 1 June 2026, HMRC's company-car advisory rates are 7p per mile for home charging and 15p per mile for public charging. They are reimbursement benchmarks, not promises about every driver's cost.
Petrol vs electric cost calculator UK
Compare energy cost per mile and per year using the prices, efficiency and charging mix that apply to you. The result covers petrol and electricity only, not purchase price, depreciation, insurance, servicing or tax.
Your own ratesUK imperial MPGEnergy cost clearly separated
Official benchmarks
Useful checks, not universal prices
Benchmark figures make the starting example reproducible. Your actual tariff and vehicle data should control the answer.
Ofgem home rate
Ofgem's average direct-debit electricity unit rate for England, Scotland and Wales is 26.11p/kWh for 1 July to 30 September 2026. Region, payment method and tariff can differ.
Latest petrol price
The button above reads Route & Fuel's current E10 dashboard. For your own calculation, a nearby station price is more relevant than a national average.
Formula
How the cost per mile is calculated
Petrol: pump price in pence × 4.54609 ÷ UK MPG.
Electric: blended electricity price in pence per kWh ÷ miles per kWh.
The blended charging price weights the home and public rates by the percentage of charging completed at home.
Scope
What the result leaves out
This is an energy-cost comparison. It deliberately excludes purchase price, finance, depreciation, insurance, servicing, tyres, road tax, home-charger installation and electricity standing charges.
Those costs can be larger than the energy difference, so do not describe this result as total ownership cost.
Read the worked UK example
See the assumptions, formulas and cases where home charging, public charging or low annual mileage changes the comparison.
Compare petrol stops too
For a petrol journey, use the route calculator to calculate litres and test whether a cheaper station survives the detour.