Is an Electric Car Cheaper Than Petrol in the UK in 2026?

Petrol at the pump costs roughly 7 to 8 pence a mile in an efficient car, while a typical electric car charging mostly at home can cost under 4 pence a mile, a gap that looks decisive on paper. But insurance, servicing, road tax and, above all, how you actually charge the car all change the real picture. Our electric car running cost calculator lets you plug in your own numbers, but this guide walks through every part of the comparison first.

The upfront cost gap

Electric cars generally still carry a higher list price than a directly comparable petrol model, though the gap has narrowed considerably as battery costs have fallen and more affordable EVs have reached the UK market. The government's previous plug-in car grant for private buyers closed some years ago, so most of today's upfront savings come from elsewhere rather than a direct purchase subsidy.

Salary sacrifice schemes, offered through some employers, let you lease an electric car through pre-tax salary, which can meaningfully reduce the effective monthly cost compared with buying outright or financing privately, since it lowers your Income Tax and National Insurance liability at the same time. Leasing more generally, for both EVs and petrol cars, spreads the cost differently to buying, so comparing like-for-like finance deals, rather than just headline list prices, gives a fairer sense of the real upfront gap for your situation.

Running costs compared

Take a driver covering 8,000 miles a year. An electric car doing 3.5 miles per kWh, charging 80% at home at 25.7p per kWh and the rest on public chargers at 60p per kWh, spends around £744 a year on electricity. Add £650 insurance, £150 servicing and £195 road tax, and the annual running cost comes to roughly £1,739, about 21.7p a mile.

A comparable 40mpg petrol car covering the same 8,000 miles at £1.50 a litre uses around 909 litres of fuel a year, costing roughly £1,364 in fuel alone, a figure you can check against your own car and mileage with our fuel cost calculator. Add similar insurance, a somewhat higher servicing estimate of £250 to reflect the extra moving parts in a combustion engine, and the same £195 road tax, and the petrol car's annual running cost comes to around £2,459, about 30.7p a mile. On these illustrative figures, that is a saving of around £720 a year for the electric car, before accounting for the higher purchase price.

Since 1 April 2025, electric cars pay Vehicle Excise Duty on broadly the same basis as petrol and diesel cars, ending the previous exemption, so this is no longer a free line item for EV owners. Our road tax calculator and our UK car tax 2026 VED guide have the full detail on how the rates now compare across fuel types.

Charging practicalities

The single biggest factor in your real running cost is how much of your charging happens at home overnight versus on public chargepoints. Drivers with a driveway or garage who charge on a cheaper off-peak EV tariff see the lowest cost per mile by some distance, since domestic electricity, even at standard rates, is considerably cheaper per kWh than public charging.

Public charging speeds vary widely, from slower on-street and supermarket chargers to rapid and ultra-rapid motorway chargers that can add significant range in well under an hour, at a correspondingly higher price per kWh. Drivers without home charging access, relying mainly on public infrastructure, will see a noticeably smaller cost advantage over petrol, and in some cases little to none, particularly if they lean heavily on the fastest, most expensive public chargers.

Depreciation and resale

Used electric car values have been more volatile in recent years than used petrol values, partly because rapidly improving battery technology and range have made older EV models feel outdated faster, and partly because changing incentives and price cuts on new EVs have pulled used values down at times. This does not automatically make EVs a worse buy, but it does mean depreciation is harder to predict confidently than for a well-established petrol model, so checking current used values for your specific model of interest is more useful than relying on general assumptions either way.

When EVs save money, and when they do not

High-mileage drivers with reliable home charging access tend to see the clearest financial case for switching, since they rack up savings on every mile driven at the cheaper home charging rate, helping any upfront price premium pay back faster. Company car drivers and anyone able to access a salary sacrifice scheme often see an even stronger case, thanks to the tax treatment involved.

Low-mileage drivers, or anyone without off-street parking who must rely mainly on public charging, see a much smaller gap, and the maths can tip the other way entirely if a higher purchase price is combined with mostly expensive rapid charging and higher-than-average fuel costs on the petrol side, which our fuel cost calculator can help you estimate. Our electric car running cost calculator includes a payback estimate, so you can see roughly how many years it would take to recover a specific price difference based on your own mileage and charging mix, rather than relying on a generic rule of thumb.

Non-financial reasons to consider an EV

Cost is not the only factor. Electric cars are exempt from the London Ultra Low Emission Zone daily charge, a genuine saving for regular London drivers with an older, non-compliant car, on top of any fuel saving, as covered in our London driving charges guide. For anyone commuting into central London specifically, that exemption alone can be worth a few thousand pounds a year compared with an older non-compliant petrol or diesel car, which our guide to ULEZ and the Congestion Charge breaks down in full.

Many drivers also simply prefer the driving experience, quieter, with instant torque and no gear changes, alongside the environmental benefit of zero tailpipe emissions. None of this shows up directly in a running cost spreadsheet, but it is often a genuine part of the decision for people weighing up a switch.

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