EV Tariff Calculator: Should You Switch or Stay on a Single Rate?

If you're buying, or have bought, an Electric Vehicle (EV), it can feel intuitive to seek out the best EV tariff to ensure you're charging your vehicle at the lowest possible rates. However, depending on the profile of your overall electricity consumption, you might actually be better off sticking with a standard single-rate electricity tariff. 

To help quickly check what deal is best for you, we've built this easy to use EV Tariff Calculator to enable you to enter your electricity consumption and see whether you are better opting for a single-rate tariff i.e. the same price 24 hours a day, or an EV tariff which offers cheaper night usage but charges a premium for day usage. 


To use this calculator, enter your annual electricity consumption excluding your EV. To get this, it might be best to get a copy of your energy bill before you got your EV. It will be shown on your energy bill as your "Estimated Annual Consumption". Once you've done that, enter the details about your EV e.g. battery size, full range mileage and your estimated annual mileage. Our calculator will then do the work for you. In addition, you can manually enter different rates for both the Single Rate and EV tariff. 

Annual home usage Excluding EV charging
2,500 kWh

Battery size From your car's spec sheet
52 kWh
Manufacturer range Miles on a full charge
250 miles
Annual mileage Miles driven per year
10,000 miles

p/kWh
p/kWh
p/kWh
Single rate annual bill
EV tariff annual bill
Single rate
EV tariff
Enter all three tariff rates to see your result.
Estimates only. Actual bills depend on standing charges, seasonal usage, and charging behaviour. Always check full tariff details with your supplier.

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