EV charging cost calculator
Estimate the cost of charging an EV at home and away from home. Pick a car, set your mileage and home-charging share, then use your postcode to pull in live Octopus electricity rates for your region.
The calculator is a planning tool, not a tariff recommendation. It assumes the home-charged portion can use the chosen tariff rate, and any remaining miles use a broad public-charging assumption. Intelligent Go also depends on your car or charger compatibility and how its Charge Cap rules fit your charging pattern.
Last reviewed 4 June 2026.
Your car
Tesla Model 3 Standard Range: 60kWh battery, 4 miles/kWh efficiency
Annual mileage
8,000 miles per year
Home charging
90% charged at home = 1,800 kWh per year
Whole-home break-even check
Low-mileage EV households should compare the car saving against the rest of the home's electricity use. Add your rough annual household kWh, then estimate how much could realistically run in a Go or Intelligent Go cheap window without letting the car, charger, battery and Octopus app all schedule the same electricity twice.
675 kWh cheap-window household use, 2,025 kWh daytime household use