If you’re driving an electric car and you’re not on a smart EV tariff, there’s a very good chance you’re not getting the best deal for your electricity (EV fuel). We’re not talking about a fiver here and there either — we’re talking hundreds of pounds a year, quietly disappearing because your energy supplier is charging you the same rate at 2am as they are at 6pm.
We wanted to do something about that.
Say Hello to the Hypermiler EV Savings Calculator
We’ve just launched our brand new EV Charging and Savings Calculator, a free and simple tool that helps you compare EV tariffs and costs.
The idea is simple: punch in how far you drive each year and how efficient your car is, pick a tariff, and the calculator shows you exactly how much you’d spend charging at the standard Ofgem rate versus one of the UK’s best smart EV tariffs. It also breaks down your cost per mile — which, on the right tariff, can drop to less than 2p.
Why This Actually Matters
Here in the UK, the April 2026 Ofgem price cap puts standard electricity at around 24.67p per kWh. That sounds reasonable until you find out that smart EV tariffs — the ones designed specifically for people who charge overnight — can bring that down to as little as 6.5p to 8p per kWh. For the same electricity. Just at a different time of day.
For the average driver doing 7,000 miles a year, that difference works out at somewhere between £250 and £300 saved annually. For higher mileage drivers, it climbs even further. And the best part? Switching is genuinely straightforward — most suppliers can get you set up in a matter of days. Just make sure you have a compatible smart meter installed.
The calculator includes six of the best tariffs available right now, from household names like Octopus Energy and British Gas. You can click between them and watch the numbers update instantly, so it’s easy to see which one makes the most sense for how you actually drive.
For those interested, I’m currently on Octopus Intelligent Go, and this is not a sponsored article 🙂
A Note on Keeping Things Up to Date
Tariff rates change. Ofgem reviews the price cap every quarter, and energy suppliers tweak their deals in response — sometimes for the better, sometimes not. We do our best to keep the calculator as current as possible, checking in around each quarterly cap review and updating the rates whenever something shifts.
That said, we can’t always catch everything the moment it changes — and that’s where you come in.
If you’ve spotted a new EV tariff that looks like a better deal than what’s in the calculator, we’d genuinely love to hear about it. Maybe your supplier has quietly dropped their overnight rate, or a new provider has launched something we haven’t come across yet. Whatever it is, drop us a message and we’ll take a look. If it checks out, we’ll get it added and credit you for the tip.
Go See What You Could Save
Saving money on fuel has always been what we are about — whether that’s squeezing an extra few miles out of a tank of petrol or making sure your EV is charging at the cheapest possible rate while you sleep. The calculator is just the latest tool in that mission.
Head over to the EV Charging and Savings Calculator, plug in your numbers, and see what you could be saving. You might be pleasantly surprised. If you don’t already have a grasp on your EV efficiency then you’ll need to calculate your Miles per kWh which you can do easily using our EV MPG calculator here – https://www.hypermiler.co.uk/ev-mpg-calculator
And if you spot a deal we’ve missed, please let us know.
