What Public EV Charging Actually Costs in the UK

"Is it cheaper than petrol?" is the wrong question, because the answer depends almost entirely on where you charge. Charge at home overnight on an EV tariff and running an electric car is dramatically cheaper than a petrol equivalent. Rely exclusively on ultra-rapid chargers at motorway services and the gap narrows to almost nothing.

Both of those statements are true at the same time, and understanding why is worth real money.

Everything is priced per kWh

UK public charging is sold by the kilowatt-hour — a unit of energy, the same unit on your domestic electricity bill. Your car's battery is measured in the same unit, so the arithmetic is unusually clean: a 60kWh battery charged from empty to full takes 60kWh, and at 80p per kWh that is £48.

In practice you rarely charge from empty to full, so the useful sum is battery size × the percentage you are adding × price per kWh. Adding 50% to a 60kWh battery is 30kWh; at 80p that is £24.

Charging is not perfectly efficient — a little energy is lost as heat, more so on AC and more so in the cold — so you may be billed for slightly more than lands in the battery. Budget a few percent and do not lose sleep over it.

The rough price tiers

Exact figures move with wholesale energy prices and differ by network, so treat these as the shape of the market rather than a price list. Check the operator's app for the number that applies to your session.

Home, standard tariff. Your normal domestic rate. The cheapest charging available to most people without doing anything clever.

Home, EV tariff, off-peak. Specialist EV tariffs from the major suppliers offer a deeply discounted overnight window — often a fraction of the standard rate — in exchange for a higher daytime rate. For a driver who can charge on a driveway overnight, this is transformative, and it is where the "EVs cost pennies to run" claims come from. They are true, but only in that window.

Public slow and fast AC (7–22kW). Substantially more than home, but the cheapest public option. Some council-run on-street bays and destination chargers at hotels or leisure centres are at the friendlier end, and a handful of supermarket and car park chargers remain free as a customer draw.

Public rapid and ultra-rapid DC (50kW+). The most expensive way to buy electricity for a car, typically several times the off-peak home rate. You are paying for hardware, grid connection capacity, land and convenience, not just energy.

The headline to take away: rapid public charging commonly costs around three times what home charging does, and can be considerably more against an off-peak EV tariff.

The VAT quirk

Part of that gap is not the networks' doing. Domestic electricity is charged at a reduced 5% rate of VAT. Electricity from a public charge point is charged at the standard 20%.

So before any network has set a margin, public charging starts with a 15-percentage-point tax disadvantage. This has been a long-running complaint from EV bodies — it falls hardest on drivers without off-street parking, who have no choice but to charge publicly and therefore pay the higher rate on every mile. Worth knowing when you are tempted to blame the operator for the whole difference.

Comparing it honestly to petrol

To compare like with like, convert to pence per mile.

For an EV: take your car's real-world efficiency in miles per kWh — 3 to 4 is typical for a family car, less in winter, more in gentle summer driving — and divide the price per kWh by it. At 8p per kWh off-peak and 3.5 miles per kWh, that is a little over 2p per mile. At 80p per kWh on a rapid charger, the same car costs about 23p per mile.

For a petrol car: divide the price per litre by the miles per gallon, then adjust for the 4.55 litres in a gallon. A car doing 45mpg at £1.40 a litre costs roughly 14p per mile.

So the honest summary is that home charging beats petrol comfortably, and exclusive rapid charging can cost more per mile than a reasonably efficient petrol car. Most drivers live somewhere in between, doing the great majority of charging at home or at work and using rapid units only on longer trips — and that blend still comes out well ahead.

How you actually pay

Since the Public Charge Point Regulations came into force, the payment situation has improved considerably. New public charge points of 8kW and above, and all existing rapid units of 50kW and above, must accept contactless card payment — so a bank card is now a viable universal fallback rather than a gamble.

The regulations also require operators to display pricing in pence per kWh before you start, to run a 24/7 free helpline, and to meet a 99% reliability standard across their rapid networks. If a charger takes your money and delivers nothing, that helpline number is on the unit and it is the fastest route to a refund.

Network apps and RFID cards still exist and often carry slightly better rates, subscription tiers or account credit. Whether they are worth it depends on your pattern: if you use one network repeatedly, a subscription can pay for itself; if you charge opportunistically wherever you happen to be, contactless and no monthly fees is the simpler life.

Four things that genuinely save money

Charge at home overnight if you possibly can, and get on an EV tariff if you do. This one decision dominates every other saving available.

Use AC destination charging while you are doing something else. A 7kW post during the weekly shop is far cheaper than a rapid unit, and the time is free because you were in the shop anyway.

Stop at 80% on rapid chargers. Not a price saving directly, but the taper means the last 20% occupies the bay for a disproportionate time — and overstay fees are real.

Check the price before you plug in. Rates between networks at the same speed can differ substantially, and on a 30kWh top-up that difference is a few pounds every time.

Our town pages show which operators run each charge point, so you can see at a glance which networks you will be dealing with before you set off — and pick the one whose pricing you already know.