"EVs cost 2p a mile to run." You see this number everywhere. It is true — under one specific scenario: 100% home charging on an Economy 7 or EV-specific tariff, overnight, full battery to empty.

Reality is messier. Most UK drivers cannot home-charge for every mile (no driveway, terraced street, flat with no parking). Public chargers cost 4-10x more than home overnight rates. Motorway rapid chargers cost 12-20x more. The real per-mile cost varies enormously depending on how and where you charge.

Here are the honest UK numbers for 2025-2026, plus the policy changes (VED for EVs from April 2025) every owner needs to factor in.

The Real Cost Per Mile (Honest UK Numbers)

Based on a typical UK EV consuming 4 miles per kWh (a Nissan Leaf, Tesla Model 3, MG4, Kia Niro EV, etc.):

  • Home overnight, EV-specific tariff (e.g. Octopus Go at ~7p/kWh): 1.75p per mile. The headline number marketing uses.
  • Home daytime, standard tariff (~28p/kWh after Oct 2024 price cap): 7p per mile. Still much cheaper than petrol.
  • Public AC charger (lamp-post or destination, 7-22kW, ~45-55p/kWh): 11-14p per mile.
  • Public DC rapid charger (50kW, supermarket / forecourt, ~65-75p/kWh): 16-19p per mile.
  • Motorway ultra-rapid charger (150-350kW, 79-89p/kWh): 20-22p per mile.

For comparison, a 50mpg petrol car at £1.45/litre is roughly 13p per mile.

So: an EV charged exclusively on motorway rapid chargers costs MORE per mile than the petrol car it replaced. An EV charged exclusively at home overnight costs about a tenth of the petrol equivalent.

The Real Annual Cost — A Worked Example

Average UK driver does about 7,400 miles per year (per Department for Transport data).

Best case scenario (100% home overnight, EV tariff): 7,400 × 1.75p = £130/year in "fuel".

Realistic mixed scenario (70% home, 20% public AC, 10% rapid):

  • 5,180 miles home: £91
  • 1,480 miles public AC: £185
  • 740 miles rapid: £141
  • Total: £417/year

No-driveway scenario (no home charging, all public AC + occasional rapid):

  • 5,920 miles public AC: £740
  • 1,480 miles rapid: £281
  • Total: £1,021/year

The petrol equivalent at 50mpg costs about £960/year for the same 7,400 miles.

The EV cost advantage is real but it is conditional on home charging access. Without it, the savings shrink dramatically and may evaporate entirely.

The April 2025 VED Change — Most Owners Missed This

Until April 2025, most UK EVs paid £0 vehicle excise duty (road tax). From 1 April 2025, that changed:

  • EVs first registered from 1 April 2025 — pay the lowest first-year rate (£10), then standard rate (£195/year from year two)
  • EVs registered between April 2017 and March 2025 — move to the standard rate from April 2025 (£195/year)
  • EVs over £40,000 list price registered from April 2025 — additionally pay the "expensive car supplement" of £410/year for years 2-6 of ownership (£605/year total)
  • EVs registered before April 2017 — also moved off zero VED, now pay the older bands (£20/year for most)

For a £45,000 Tesla Model 3 registered in 2026: £605/year VED for years 2-6, then £195/year. Over 5 years that is approximately £3,025 in road tax. Materially affects the EV cost-of-ownership story.

(See the full updated VED rates on gov.uk under "Vehicle tax rates".)

Other Costs Marketing Does Not Mention

Insurance

EV insurance premiums rose roughly 50% in 2024 versus equivalent petrol cars, per industry data. Reasons: higher repair costs (battery damage from minor knocks can write a car off), specialised technician shortage, parts supply chain still maturing. Get quotes BEFORE buying.

Depreciation

EV depreciation has been brutal in 2024-2025 — some models lost 40-50% of list price in the first year (versus 20-30% for equivalent ICE). Used EV market is recovering but the early-adopter premium has collapsed. Buying used EVs (1-3 years old) is the cost-efficient play.

Tyres

EVs are heavier and have instant torque — they wear tyres faster. Plan to replace 20-30% sooner than equivalent ICE car. Specialist EV-rated tyres cost 10-15% more.

Battery health

Most EV batteries are warranted for 8 years / 100,000 miles to 70% of original capacity. Beyond warranty, replacement costs vary by model — £4,000-£15,000 for mainstream EVs, more for premium. Check warranty terms before buying used.

The Honest Decision Framework

EV makes financial sense if:

  • You have driveway / off-street parking with a wallbox installed (£800-1,400 one-off, often grant-supported for tenants)
  • You can use an EV-specific tariff (Octopus Go, EDF GoElectric, OVO Charge Anytime — typically 5-9p/kWh overnight)
  • You drive 8,000+ miles per year — fixed-cost benefits (no road tax until April 2025, lower servicing) amortise across more miles
  • You plan to keep the car 4+ years — depreciation hit smooths out

EV is harder to justify financially if:

  • You have no off-street parking
  • You drive less than 5,000 miles per year (depreciation outweighs fuel savings)
  • You regularly drive 200+ mile trips (motorway rapid charging adds significant cost)
  • You change car every 2-3 years (steep depreciation crystallises)

None of this means EVs are bad — they are quieter, faster, cleaner, often nicer to drive. But the "saves you thousands a year" pitch is conditional on circumstances most marketing skips.

Tracking Your Real Numbers

The only way to know your actual EV running cost is to log every charge — date, kWh added, location, cost. Over 12 months, average cost per mile becomes obvious. You will quickly see whether you are in the £130/year camp or the £1,000/year camp.

Sources & Further Reading

  • gov.uk — Vehicle tax rate tables (official VED rates including April 2025 EV changes)
  • SMMT — UK EV registration statistics, market share data, manufacturer-published WLTP figures
  • Energy Saving Trust — EV charging guidance, home wallbox grants and tariff comparisons
  • The AA — EV recharge report (monthly average prices for home, public AC, rapid charging)
  • RAC — fuel watch and EV charging cost comparisons
  • Which? — EV reliability surveys, real-world range tests, charger reviews
  • Zap-Map — UK public charging network coverage and pricing — zap-map.com
  • What Car? — independent EV running-cost calculator and reviews — whatcar.com

Why We Care

My Mekavo is free for UK car owners. Log every charge, every cost, every mile — across home, public and motorway. Over a year, you see the real number. Not the brochure number. The number that helps you decide whether your next car should be EV or stay petrol.