Friday, 3 July 2026 · London
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Updated 4 Jun 2026
The running-costs pillar

What it really costs to run an electric car.

Charging, road tax, the lot, computed on your numbers rather than a marketing average. This is the pillar where you actually do the maths.

3 calculators·2 guides·off-peak 8p/kWh·£200 + ECS road tax
The numbers that matter 2026/27
Charging vs petrol −87%
Road tax now, + ECS £200
Sal-sac BIK, to 2030 4 → 9%
Start here · the calculatorRunning cost
Editorial bar diagram comparing a year's fuelling cost: a Tesla Model Y at £164 a year against £1,151 for the petrol equivalent, on our defaults.

What an EV costs to charge at home

Pick your car, your mileage and your tariff. We turn it into a yearly cost and hold it up against petrol at 45 mpg. No average, your number.

£164/yr
Model Y on IOG
vs £1,239
Petrol equivalent
8p/kWh
Off-peak rate used
Open the calculator
The calculators

This pillar is the tools.

Four numeric calculators, each built on published rates and each showing its working. Free, no email gate.

Every tool
State of play · 2026

The 2026 running-cost landscape.

Running an EV is still much cheaper than running a petrol car, but 2026 is the year the gap stopped widening and the rules got more complicated. Charge at home on a smart tariff and you're paying around 8p per kWh off-peak, which works out near £164 a year for a typical Model Y against roughly £1,239 in petrol. That part hasn't changed.

What changed is tax. After the April 2026 VED change, EVs pay road tax like everything else, and pricier models get caught by the Expensive Car Supplement on top. It's not a large number against the fuel saving, but it's no longer zero, and the brochures haven't all caught up.

The honest caveat: these are off-peak figures. Charge during the day at 26p, or factor the standing charge on a low-mileage household, and the maths tightens. That's exactly why we built the calculators instead of quoting an average.

We built the calculators instead of quoting an average. Your bill isn't average.
Written by JustWatt editorsHow we work →
What changed this year
APR 2026
EVs pay VED. £200 standard, plus the Expensive Car Supplement on costlier models.
2026
Off-peak ~8p/kWh keeps home charging far below petrol, near £164/yr on our defaults.
ONGOING
Peak and standing charges are where the average gets misleading, hence the calculators.
How we work

Independent, affiliate-funded, and honest about both.

Written by Ross and the JustWatt editors — two by-lines, no ghost-written filler. Who we are →
01

We don't sell what we review.

No chargers, no schemes, no installs. Our only job is to be right.

02

Affiliate links are disclosed, never decisive.

Some links earn us a commission. They never change a verdict or a ranking. How that works →

03

Every number shows its working.

Rates, tariffs and assumptions are cited and dated. If we can't source it, we don't say it.