Should driving instructors switch to an EV in 2026? The maths no one shows you

Learners are moving to automatics. AA analysis of DVSA data found that 26% of car practical tests in 2024/25 were taken in an automatic, up from 23.4% the year before (AA, September 2025). Every EV is an automatic, so going electric also puts you in that market.

The running-cost case is less simple than it was. EVs registered since April 2025 pay road tax, and from April 2028 they will pay a per-mile charge that petrol cars don't. And if you teach in a dual-control car, HMRC's flat mileage rate was never an option in the first place.

This is the 2026 maths on EV against petrol for a full-time instructor: fuel, tax, charging and depreciation.

The five variables

Whether an EV saves you money depends on five things, not one:

1. Your annual business mileage. High mileage multiplies the fuel saving.
2. Where you charge. Home charging is cheap. Public rapid charging costs more per mile than petrol.
3. The car you buy. Its price decides the depreciation, any grant, and whether the Expensive Car Supplement applies.
4. How you claim tax relief. Capital allowances treat a new EV very differently from a petrol car.
5. How long you keep it. Depreciation dominates short ownership. Running costs dominate long ownership.

Get one of these wrong and the answer can flip.

Variable 1: annual business mileage

EVs win on running costs because a mile on home electricity costs far less than a mile on petrol. Here is the fuel cost per mile at current prices:

Pump prices are the UK averages for the week of 21 September 2026 from DESNZ. The standard electricity rate is Ofgem's price cap direct debit average for 1 October to 31 December 2026. The overnight rate is Intelligent Octopus Go's smart-charging rate from 1 October 2026, as one example of an EV tariff. The public figure is Zapmap's weighted average pay-as-you-go price on rapid and ultra-rapid chargers in August 2026. The mpg and miles per kWh are our assumptions, so swap in your own car's figures.

On a smart overnight tariff, an EV's fuel cost per mile is less than a seventh of a petrol car's. Applied to instructor mileage:

For a full-time ADI doing 30,000 miles a year with home charging, the fuel saving is big. For a part-timer doing 12,000 miles it's smaller and can be swallowed by higher depreciation and insurance.

Action: work out your real annual business mileage from your mileage log and odometer, not from memory.

Variable 2: charging

This is the variable that breaks the EV maths for instructors who can't charge at home.

On Zapmap's August 2026 average of 77p per kWh, public rapid charging costs about 22p a mile at 3.5 miles per kWh. That's more than the 17.4p a mile for a 45mpg petrol car. If you live in a flat, have no driveway, or your landlord won't allow a charger, you pay more per mile than petrol, on top of the EV's higher price.

Action: check your charging before you buy.

• Do you have off-street parking that could take a home charger? If you rent, or own and live in a flat, the government's chargepoint grant covers 75% of the cost of buying and installing one, up to £500. You need private off-street parking. There is no grant for homeowners with a driveway.
• If you rent, has your landlord agreed to a charger?
• What does your electricity supplier charge for overnight EV charging? Compare it with the 26.32p price cap rate.
• Are there public chargers on your usual routes as a backup, not as your plan?

If the answer to most of these is no, the EV case gets weak fast. Don't buy one.

Variable 3: the car

Road tax. EVs now pay VED. A new zero-emission car pays £10 in its first year, then the £200 standard rate that petrol and diesel cars also pay (GOV.UK vehicle tax rates). From the second year, road tax is the same for both, so it doesn't change the comparison.

Expensive Car Supplement. The ECS adds £440 a year for five years, from the second time the car is taxed. For petrol and diesel cars it applies over a £40,000 list price. For electric cars the threshold has been £50,000 since 1 April 2026, after the government raised it in the November 2025 Budget. A tuition EV under £50,000 pays no ECS. Over £50,000, you pay £1,760 in ECS across a five-year ownership (four payments, years two to five).

Electric Car Grant. The government's Electric Car Grant takes up to £3,750 off eligible new EVs (Band 1) or £1,500 (Band 2), for cars priced up to £42,000. The Nissan Leaf is in Band 1. The Vauxhall Corsa Electric, Peugeot e-208 and VW ID.3 are in Band 2. The MG4 is not on the list. Check the current list and eligibility before you order.

For individual models, our best cars for driving instructors guide compares them on running costs.

Action: keep the list price well under £50,000. A bigger EV buys comfort, not efficiency, and every extra pound you pay upfront shows up again in depreciation.

Variable 4: how you claim tax relief

The mileage rate is out. HMRC's flat mileage rate (55p a mile for the first 10,000 business miles in 2026-27, 25p after) can't be used for "dual control driving instructors' cars" (GOV.UK simplified expenses). If you teach in a dual-control car, you claim your actual running costs plus capital allowances on the car, whether it's petrol or electric. So the fuel saving above is a real cash saving, not a gap against a flat rate.

Capital allowances favour a new EV. A new, unused electric car bought before April 2027 qualifies for a 100% first-year allowance, so you can deduct the whole cost from your profits in the year you buy it. A petrol car with CO2 emissions over 50g/km gets the 6% special rate each year, and a second-hand EV gets the 14% main rate (GOV.UK business cars).

For a limited company, a £35,000 new EV claimed in full saves £6,650 in Corporation Tax at the 19% small profits rate, which applies to profits of £50,000 or less (GOV.UK Corporation Tax rates). A £22,500 petrol car at 6% gives a first-year allowance of £1,350, worth £256.50 at 19%.

The allowance brings the tax relief forward. It doesn't make the car free. But for a company paying for a new car, getting the relief in year one is a real cash-flow gain.

Action: if you're buying new and have the profits to use it, factor the first-year allowance into your comparison. Your accountant can tell you how it plays out for your business.

Variable 5: depreciation and ownership length

EVs can lose value faster than petrol cars over the first two or three years. Over five years or more, the depreciation gap matters less because running costs pile up year after year.

We can't give you market residual values, so the model below uses our own assumptions. Replace them with real quotes for the cars you're considering:

• Petrol supermini at £22,500 new, worth £8,000 after five years at 30,000 miles a year (loss: £14,500)
• Small EV at £27,500 new, worth £9,500 after five years (loss: £18,000)

On those assumptions the EV loses £3,500 more to depreciation, against a five-year fuel saving of more than £22,000 with overnight home charging.

Action: plan to keep an EV for at least five years. If you change cars every two or three years, depreciation takes a bigger share of the saving.

The 5-year comparison

For a full-time instructor doing 30,000 business miles a year with overnight home charging, buying in autumn 2026. Depreciation, insurance and servicing are our assumptions. Fuel, electricity, VED and the per-mile charge use the sourced rates above.

Petrol supermini (£22,500)

Small EV (£27,500)

EV five-year saving: £16,090, about £3,200 a year, on these assumptions. That's before any Electric Car Grant or first-year allowance, and it needs home charging and a car well under £50,000.

If you charge at home but pay the standard 26.32p rate (7.52p a mile), electricity rises to £11,280 and the saving falls to £8,240.

Without home charging, swap in public rapid charging at 22p a mile: electricity becomes £33,000, the EV's total is £62,850, and it costs £13,480 more than the petrol car. Without home charging, the EV case disappears.

The pay-per-mile charge

From 1 April 2028, battery EVs will pay Electric Vehicle Excise Duty of 3p a mile, and plug-in hybrids 1.5p. It rises with CPI inflation from 2029-30. Petrol and diesel cars don't pay it. They keep paying fuel duty through the pump price.

For a 30,000-mile ADI that's £900 a year from April 2028, a cost the petrol car doesn't have. It's already in the EV table above. It narrows the EV's advantage but doesn't remove it for a home charger: 2.3p plus 3p is still well under petrol's 17.4p a mile.

The commercial angle

Automatic tests are a growing share: 26% of car practical tests in 2024/25, on the AA's analysis of DVSA data. When the AA Driving School launched electric lessons in 2022, 40% of 191 learners it surveyed said they would switch to automatic EV lessons if they were available (AA, March 2022).

Whether you can charge more for EV lessons depends on your area. As a test: if you could charge £3 an hour more over 30 hours a week and 46 teaching weeks, that's £4,140 a year in extra takings. Check what local automatic instructors charge before you count on it.

The decision

Go EV if:

• You can charge at home, ideally on an overnight EV tariff
• You do 20,000 or more business miles a year
• You'll keep the car at least five years
• There's automatic demand in your area
• You're buying new and can use the 100% first-year allowance

Stay petrol if:

• You can't charge at home
• You do under 15,000 business miles a year
• You change cars every two or three years
• Your local pupils won't pay more for automatic lessons

Think hard about premium EVs. Above £50,000 you add £1,760 of ECS over five years, and every extra pound of list price is exposed to depreciation. You're paying for comfort, not a lower cost per mile.

Run your own numbers: your mileage, your charging, your tariff, how long you'll keep the car. The gap between an EV saving you £16,000 over five years and costing you £13,000 isn't the car. It's which version of these five variables applies to you.

Orbit logs your fuel and other vehicle costs with receipts alongside your business mileage, so you have the real figures to work out your own cost per mile, whichever car you choose.