UK businesses are facing renewed pressure on their vehicle budgets as petrol and diesel prices rise, putting fuel duty and business mileage reimbursement rates firmly in the spotlight ahead of the Autumn Budget on 28 October 2026.
Chancellor John Healey is expected to announce an extension to the fuel duty freeze, retaining the existing 5p-per-litre reduction, while the Government has already increased approved mileage allowance payments for employees who use their own cars or vans for work.
For fleet operators, tradespeople and businesses that depend on road transport, the decisions could have implications for operating costs, employee expenses and longer-term vehicle planning.
Businesses can also review rising fuel prices and business vehicle costs to understand the wider pressures affecting transport budgets.
Key Budget Measures For Business Drivers
| Budget measure | Position ahead of the Budget | Potential impact on businesses |
|---|---|---|
| Fuel duty | An extension of the freeze is expected, but awaits confirmation | Could help avoid additional fuel duty increases |
| Mileage allowance rates | Revised AMAP rates took effect from 6 April 2026 | May increase reimbursement costs for employers paying the higher rate |
Fuel Duty Freeze Could Offer Some Relief To Businesses
Fuel costs have become an increasingly difficult expense for businesses operating petrol and diesel vehicles. Rising prices place additional pressure on organisations that rely on vans for deliveries, customer visits, maintenance work and other daily operations.
The Government previously extended the temporary 5p-per-litre fuel duty reduction introduced in 2022, with a phased reversal of the cut scheduled to begin in September 2026. Further increases were planned for December 2026 and March 2027.
However, the Chancellor is expected to reconsider the planned increases in the Autumn Budget, potentially providing businesses with some protection against additional tax-related fuel costs.
Any extension would be welcome news for operators already managing higher fuel bills. However, maintaining a lower duty rate would not necessarily translate into cheaper petrol and diesel at the pumps, as retail prices are also influenced by wholesale fuel costs, exchange rates, distribution expenses and other market factors.
For businesses running several vehicles, even relatively small changes in the cost of each litre can accumulate across a fleet covering thousands of miles every month. A fuel cost calculator can help businesses estimate expenditure based on mileage, fuel consumption and current prices.
Higher Mileage Allowance Rates Support Grey Fleet Drivers
The treatment of business mileage is another important consideration for employers. Grey fleets comprise employees using their own vehicles for work-related journeys rather than driving vehicles provided by their employer.
Increases to Approved Mileage Allowance Payments (AMAPs) took effect retrospectively from 6 April 2026, raising the approved rate for the first 10,000 business miles from 45p to 55p per mile.
The rate for business mileage above 10,000 miles remains 25p per mile under the published 2026/27 rules.
Approved Mileage Allowance Payments For 2026/27
| Business mileage | HMRC approved rate | Example calculation |
|---|---|---|
| First 10,000 business miles | 55p per mile | 6,000 miles = £3,300 |
| Business miles above 10,000 | 25p per mile | 15,000 miles = £6,000 in total |
These figures represent the standard approved mileage amounts for eligible employees using their own cars or vans for business journeys. They are not a requirement for every employer to reimburse employees at these rates.
The allowances are intended to account for the overall costs of using a privately owned vehicle for business, including fuel, insurance, servicing, maintenance and depreciation.
Employers should review their mileage policies, reimbursement budgets and payroll arrangements to ensure they reflect the applicable rules. Where an employer pays less than the approved amount, an eligible employee may be able to claim tax relief on the shortfall, subject to HMRC requirements.
Businesses can find further information in CVC’s guide to mileage allowance in vehicle leasing and its update on HMRC mileage reimbursement rates.
What Do The Changes Mean For Fleet Budgets?
Fuel duty and mileage reimbursement are only two elements of the wider cost of running business vehicles.
Employers must also account for vehicle leasing or finance payments, insurance, maintenance, downtime and the practical demands placed on their drivers. When fuel prices rise, these combined expenses can make it more difficult to forecast expenditure accurately.
Businesses operating grey fleets should assess whether employees are using their own vehicles efficiently for work and whether the current arrangement remains appropriate for the organisation.
For some companies, providing leased business vehicles may offer a more structured approach to managing vehicle availability, maintenance and replacement schedules. For others, employees’ own vehicles may remain suitable for occasional business journeys.
The important consideration is to assess the actual costs, mileage requirements and operational needs rather than assuming that one approach will always be cheaper.
Businesses can also use fuel consumption data and journey records to identify avoidable mileage, unnecessary journeys and vehicles that may no longer be suited to their workloads.
Understanding the total cost of ownership for business vehicles can help decision-makers compare running expenses with leasing, maintenance and other vehicle-related costs.
Could Rising Fuel Prices Accelerate The Move To Electric Vehicles?
Continued pressure on petrol and diesel costs may encourage some businesses to review the role of electric vehicles within their fleets.
Electric vehicles can offer lower energy costs per mile in suitable circumstances, particularly where businesses can charge vehicles at competitive off-peak electricity rates or at their own premises. However, the financial case depends on factors including leasing costs, mileage, charging access, electricity tariffs and the type of work being undertaken.
For van operators, payload, driving range, charging time and access to suitable charging facilities must also be considered before making a change.
A mixed fleet may be a practical option for businesses whose vehicles have different daily mileage requirements or operating patterns. Electric vehicles may suit predictable local routes, while petrol or diesel vehicles may remain appropriate for certain longer-distance or specialist applications.
Businesses considering a switch can explore electric van leasing and learn more about leasing electric vehicles amid rising fuel prices.
Reviewing total cost of ownership, rather than fuel expenditure alone, can help businesses make more informed decisions about their next vehicles.
Planning Ahead For The Autumn Budget
The Autumn Budget could provide greater clarity on fuel duty and the Government’s approach to supporting motorists and businesses facing higher transport costs.
Until the Chancellor confirms the measures, businesses should treat the expected fuel duty freeze as a proposal rather than a guaranteed saving. The published mileage allowance increase, meanwhile, is already in effect for the 2026/27 tax year.
Organisations can take practical steps to improve control over their vehicle expenditure by reviewing mileage claims, monitoring fuel consumption, assessing vehicle suitability and planning replacements around operational requirements.
Businesses looking to take a more structured approach can also review their fleet planning and leasing options.
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