Rachel Reeves's New Car Tax Rules: What the July Changes Really Mean for Drivers and Hauliers

If you drive for a living, or simply use your own car for work trips, this week's Treasury announcement is worth more than a passing glance. Buried beneath a headline about "car tax measures" is a package that touches everything from the cost of moving goods around the country to the pennies you claim back for driving to a client meeting. It's the kind of policy update that rarely makes the front page, yet quietly reshapes household and business budgets for months to come.

What Happened

From 1 July 2026, a set of new tax measures affecting road transport came into force. The headline change is a temporary £1 Vehicle Excise Duty (VED) rate for eligible heavy goods vehicles (HGVs), effectively slashing the standard cost of taxing a lorry to a nominal fee for those that qualify. Alongside this sits a reduction in duty on rebated red diesel, running until the end of the year, aimed at easing fuel costs for the sectors still entitled to use it.

At the same time, HMRC's tax-free mileage rates, the amounts employees can claim when using their own vehicle for work, have also gone up. These are the rates that determine how much you can be reimbursed per mile without it counting as a taxable benefit.

Taken together, the measures represent a two-pronged approach: direct relief for the haulage industry through VED and fuel duty, and a smaller but widely felt boost for millions of employees who use their own cars, vans or motorbikes for business journeys.

Why It Matters

To understand why this matters, it helps to know the backdrop. HGV taxation in the UK has long been a patchwork of VED bands and the separate HGV Road User Levy, a charge introduced in 2014 that applies on top of standard VED for lorries over 12 tonnes. That levy has been suspended and reformed more than once in recent years, most notably during the pandemic, when ministers paused it for over a year to help hauliers absorb rising costs. A temporary £1 VED rate fits this pattern of government stepping in when the freight sector is under pressure, whether from fuel prices, driver shortages, or wider economic strain.

Red diesel, meanwhile, has been a politically sensitive fuel duty issue since April 2022, when the government stripped most sectors of the right to use rebated diesel, restricting it largely to agriculture, rail, non-commercial heating and a handful of other exempted uses. That reform was designed to remove an environmentally awkward subsidy and bring more vehicles onto full-rate diesel. A reduction in duty for those still entitled to use red diesel, even a temporary one, signals that the Treasury is trying to soften the blow for the specific industries still relying on it, likely a nod to rural hauliers, agricultural transport and construction plant operators who have felt the pinch since the 2022 changes took effect.

Then there's the mileage rate increase, which might seem like small change but adds up quickly for anyone doing significant business mileage. HMRC's Approved Mileage Allowance Payments (AMAP) scheme has historically allowed employees to claim 45p per mile for the first 10,000 business miles in a tax year, dropping to 25p thereafter for cars and vans. Crucially, those figures had remained frozen since 2011, despite fuel prices, insurance costs and vehicle running costs all rising substantially over that period. Employers were free to pay more, but anything above the HMRC threshold became taxable, effectively penalising generous reimbursement. An increase to these thresholds is a genuine, if underreported, win for employees who rely on their own vehicles for work, from care workers and sales reps to tradespeople visiting multiple sites in a day.

The Legal Angle

These changes sit within a well established legal framework. VED is governed by the Vehicle Excise and Registration Act 1994, which sets out the bands, exemptions and enforcement powers the DVLA relies on. Temporary reduced rates for HGVs, such as the £1 fee reported here, would typically be introduced through secondary legislation or Treasury regulations rather than a full rewrite of the Act, allowing government to respond quickly to economic pressures without waiting for primary legislation.

Fuel duty, including the rebate applied to red diesel, falls under the Hydrocarbon Oil Duties Act 1979 and subsequent Finance Acts. The 2022 reform that restricted red diesel eligibility was itself introduced via Finance Act provisions, and any temporary reduction in duty for remaining eligible users would follow the same statutory route. It's worth remembering that using red diesel outside of permitted categories, including in a standard road-going HGV, is a serious offence. HMRC has significant powers to inspect fuel tanks, and penalties for misuse can include seizure of the vehicle and substantial fines, regardless of any temporary duty changes.

The mileage rate increase operates differently again. AMAP rates are set out in guidance under the Income Tax (Earnings and Pensions) Act 2003, and HMRC's own Employment Income Manual sets the framework for how reimbursements are treated for tax purposes. If an employer pays below the approved rate, employees can usually claim Mileage Allowance Relief on the shortfall through a tax return or a P87 form. If an employer pays above the rate, the excess is normally taxed as a benefit. Knowing where the new thresholds sit matters both for payroll teams calculating reimbursements correctly and for employees checking they're not being short-changed, or inadvertently exposed to an unexpected tax bill.

What Drivers and Businesses Should Know

For hauliers and fleet operators, the immediate practical step is checking eligibility criteria for the reduced VED rate. Temporary reliefs like this often come with specific qualifying conditions, whether that's vehicle weight, emissions standard, or registration date, so it's worth confirming details directly through GOV.UK or with a fleet tax adviser rather than assuming blanket eligibility. Given the £1 rate is described as temporary, operators should also plan ahead for when standard rates resume, particularly if cash flow has been built around the reduced cost.

Anyone using red diesel should be doubly careful to confirm they still fall within a permitted category. The rules tightened considerably in 2022, and a reduced duty rate doesn't widen who's allowed to use rebated fuel, it simply changes the cost for those who already qualify. Using red diesel in an ineligible vehicle remains a criminal offence regardless of any duty adjustment.

For employees claiming mileage, it's worth checking payslips and expense policies to see whether employers have updated their reimbursement rates in line with the new thresholds. If your employer hasn't adjusted its rates and you believe you're being paid below the new approved level, you may be entitled to claim Mileage Allowance Relief directly from HMRC. Keeping a detailed mileage log, dates, destinations, business purpose and total miles, remains essential, since HMRC can request evidence if a claim is queried. For those weighing up whether to run their own car for business use versus a company vehicle, this is also a sensible moment to revisit the sums, since improved mileage rates can shift the balance of that decision.

Looking Ahead

These measures are explicitly temporary, and that's the detail worth watching most closely. Both the reduced HGV VED rate and the red diesel duty cut are time-limited, with the fuel duty relief running only until the end of the year. That suggests the Treasury is using these changes as a short-term buffer rather than a permanent policy shift, likely responding to immediate cost pressures within the haulage and agricultural sectors rather than committing to a long-term restructuring of freight taxation.

The bigger question is what happens when these reliefs expire. HGV operators who've benefited from a nominal VED rate face a cliff edge back to standard charges, and it's reasonable to expect industry bodies to lobby hard for an extension or a more permanent settlement before that happens. Similarly, the mileage rate increase, coming after well over a decade of frozen thresholds, raises the question of whether future adjustments will become more regular, particularly as fuel and running costs continue to fluctuate. For now, drivers and businesses affected by these changes would do well to treat July 2026 as a checkpoint, confirm what applies to them specifically, and keep an eye on further announcements before the temporary measures run their course.