UK government's new mileage tax on EVs sparks debate over sustainability and revenue concerns

The UK government’s recent announcement to introduce a pay-per-mile road tax on electric vehicles (EVs) and plug-in hybrids (PHEVs) from April 2028 marks a surprising and somewhat contentious turn in its approach to accelerating the clean transport transition. While efforts over the past years have focused heavily on incentivising EV uptake through grants and infrastructure investment, this new levy, set at 3p per mile for fully electric vehicles and 1.5p for plug-in hybrids, is being introduced primarily to recoup revenue lost from declining petrol and diesel fuel duty as electric vehicle adoption grows.

According to the Office for Budget Responsibility (OBR), the mileage charge is expected to generate around £1.4 billion annually by the late 2020s, roughly half the level of fuel duty currently paid by petrol drivers. For an average EV driver covering 8,500 miles per year, that translates into approximately £255 annually in road tax. While this amount remains significantly lower than traditional fuel taxes, the timing and introduction of such a tax have raised concerns among clean transport advocates and industry observers, who fear it could undermine efforts to boost electric car adoption, especially as the UK still aims for a complete phase-out of new petrol and diesel vehicle sales by 2030.

Analysis accompanying the policy announcement warned that the new tax could reduce EV sales by up to 440,000 vehicles over the next five years. This potential drop is notable since EV demand in the UK has already shown signs of plateauing, partly due to high upfront costs despite government subsidies. Such a tax could disincentivise prospective buyers, complicating the transition to cleaner transport modes vital for the UK’s commitment to net-zero greenhouse gas emissions by 2050.

Interestingly, the government appears aware of the potential negative impact of the mileage-based levy and has simultaneously introduced counterbalancing measures aimed at supporting EV sales. These include raising the Vehicle Excise Duty (VED) expensive car supplement threshold from £40,000 to £50,000 for electric vehicles, which could encourage ownership of higher-value EVs. Additionally, the government has committed a sizeable £1.3 billion fund to extend the Electric Car Grant, providing up to £3,750 off new EVs priced below £37,000, and an additional £200 million investment in expanding EV charging infrastructure nationwide.

These investments come as part of a broader package aiming to smooth the transition to electric mobility. Beyond purchase incentives, the UK government recently announced a further £63 million dedicated to EV infrastructure, including grants for local authorities to expand affordable at-home charging and funds aimed at electrifying NHS ambulance and medical fleets. These initiatives complement a larger £4 billion commitment to develop over 100,000 new public chargepoints by 2030, supported by a £381 million Local Electric Vehicle Infrastructure (LEVI) Fund. The objective is to resolve critical barriers faced by UK drivers who lack access to off-street parking and to create thousands of green jobs while fostering economic growth.

Despite these positive infrastructure and subsidy measures, there is a perception of inconsistency in UK EV policy. The introduction of a mileage tax close on the heels of generous incentives risks sending mixed signals to consumers and industry stakeholders alike. Opponents argue this complicates the policy landscape unnecessarily and could slow the pace of EV adoption at a critical juncture, especially as the UK government pledges to phase out petrol and diesel vehicle sales within less than five years.

From a fiscal perspective, the mileage tax reflects the government’s need to address the long-term decline in fuel duty revenue, which the OBR estimates could reduce by nearly 0.6% of GDP by 2050. However, balancing immediate revenue needs with the urgent imperative to decarbonise road transport presents a policy challenge. Industry experts suggest a phased or carefully designed approach would have better supported sustained growth in electric vehicle markets without risking consumer resistance.

The UK government’s split approach, combining expanded subsidies and charging infrastructure investments with a novel tax on electric miles, paints a complex picture. While the expanded grants and infrastructure funding demonstrate a robust commitment to the electric vehicle revolution, the mileage-based road tax risks dampening momentum just as the UK strives to meet its ambitious environmental targets. Policymakers will need to closely monitor and possibly adjust this tax’s impact to ensure it does not stall progress toward cleaner, more sustainable transportation.