The 3p Per Mile Question: How the 2028 EV Road Charge Will Actually Work

Somewhere in the middle of every electric car conversation in 2026 sits the same question: what happens when the taxman comes for the miles? The answer now exists in law, or close to it. From 1 April 2028, battery electric cars will pay a road charge of 3p per mile, plug-in hybrids 1.5p, under the new Electric Vehicle Excise Duty, or eVED. The government published its response to the consultation on the scheme's design in July, so the shape of the thing is now clear. Here is what it means for you.

Why it exists at all

The reason is fuel duty, and the slow leak in it that nobody has been willing to fix. Drivers of petrol and diesel cars pay duty at the pump, which scales with how much they drive. Drivers of electric cars pay nothing equivalent, since you cannot tax electricity at a plug the same way. The Treasury's consultation document puts the problem bluntly: if nothing changes, by 2030 around one in five car drivers will pay no fuel duty at all, while other motorists continue to contribute an average of £480 a year.

The revenue at stake is large. Fuel duty receipts are expected to fall to roughly half, to around £12bn a year in the 2030s, as the car fleet electrifies. The OBR has forecast the decline for years, and the government has decided the honest option is a mileage-based charge rather than a plug tax or a lump sum, since a mileage charge preserves the principle that how much you pay depends on how much you drive.

The rules as they stand

The headline rates are confirmed in the policy paper published on GOV.UK: 3p per mile for battery electric and hydrogen cars, 1.5p per mile for plug-in hybrids, from 1 April 2028, with rates rising in line with CPI inflation from 2029-30 onwards. The charge applies to UK-registered cars, and it will be administered by the DVLA as an extension of the existing Vehicle Excise Duty system rather than as a new scheme bolted on separately.

The mechanics are simpler than the "pay-per-mile" label suggests, and a good deal less sinister than early speculation feared:

No trackers. The government has confirmed eVED will not require GPS devices in cars. Mileage comes from the odometer, the same reading already collected at every MOT and viewable for most cars on GOV.UK.
Self-declared estimates, reconciled at year end. Drivers estimate their mileage for the coming tax year, pay upfront or in instalments, then a year-end odometer reading triggers a reconciliation, up or down.
Existing checks do the policing. Where a car has an MOT, the recorded mileage will be compared against the declared figure, so there is typically no extra admin step.
VED still applies separately. Electric cars have been liable for standard VED since 2025, and eVED sits on top of it, not instead of it.

The OBR's arithmetic

The Office for Budget Responsibility has certified the numbers, and they are worth knowing: they frame the debate. The charge is set at roughly half the fuel duty rate paid per mile by drivers of petrol cars. An electric car driver covering 8,500 miles in the 2028-29 financial year, close to the UK average, would pay about £255. The exchequer impact is projected at +£1.1bn in 2028-29, rising to £1.87bn by 2030-31, affecting around 5.6 million vehicles in the first year.

The OBR has also been frank about the behavioural side, and this is the part that generated the headlines. It judges the charge "likely to reduce demand for electric cars as it increases their lifetime cost", forecasting around 440,000 fewer EV sales than would otherwise occur, of which other government policies, chiefly the extended Electric Car Grant, are expected to offset around 320,000. Manufacturers wanting to hit their ZEV mandate targets would need to respond with lower prices, the OBR says, a dynamic the market is already familiar with.

What it does to the running-cost maths

Set against the charging economics we set out in our guide to public charging prices, the charge lands softly rather than hard. A driver charging overnight at home on a typical off-peak EV tariff pays around 8p per kWh, or roughly 2p per mile for an efficient car. Adding 3p per mile in 2028 takes that to about 5p per mile. A petrol car doing 45mpg at today's pump prices pays comfortably more than that in fuel alone, before any duty-by-duty comparison. The gap narrows; it does not close.

The squeeze is real only at the expensive end of public rapid charging, where 23p per mile becomes 26p. Even there, the government has kept the incentive structure pointing the right way: eVED is deliberately set at half the petrol-equivalent rate, and at half again for plug-ins, so electric remains cheaper per taxed mile than combustion. The company car picture stays favourable too, as we covered in our guide to EV company car tax, and the BiK advantage dwarfs the new charge for fleet drivers.

The honest questions left open

None of this means the scheme is beyond criticism. Three issues are worth holding in mind.

First, odometer tampering. The government's own documents acknowledge the tax "may increase the likelihood of motorists choosing to clock their vehicles", and mitigation is still being worked through. Odometer readings at MOT are a decent audit trail, but not an unbreakable one.

Second, fairness between driveways. A driver who charges at home on an off-peak tariff absorbs 3p per mile almost without noticing. A driver dependent on public rapid chargers, paying three times as much for energy, feels the same 3p as a proportionally bigger blow. The charge is flat; the charging costs beneath it are not.

Third, timing. Environmental groups have argued the charge is premature while public charging prices remain high relative to home charging, and the OBR's own sales forecast concedes the point in numbers. The counter-argument, that waiting makes the fiscal hole bigger and the eventual adjustment harsher, is at least honest arithmetic.

The honest read

The 3p per mile charge is the end of the tax holiday for electric cars, not the end of the electric car's cost advantage. From April 2028, an average-mileage driver pays about £255 a year, roughly half what a petrol driver pays in fuel duty for the same miles, and the money funds the roads everyone uses. The incentive to switch survives by design, the admin rides on systems that already exist, and there are no trackers. The genuine debates, about clocking, about flat charges on unequal charging costs, about whether 2028 is too early, are real but they are arguments about the edges of a policy whose centre is defensible. For buyers, the practical advice is unchanged: the total-cost case for electric rests on cheap home charging and lower servicing, and a 3p per mile charge dents it without breaking it.