The Treasury has made a new order, laid before the House of Commons on 22 May 2026, that keeps the fuel duty freeze in place until 31 December 2026. It takes effect on 15 June 2026 and also gives a temporary extra lift to rebates on certain rebated fuels. For businesses, the message is fairly clear. Ordinary road fuel duty is not rising this summer, while firms that are still allowed to use rebated fuels such as red diesel will see a lower effective duty bill for the rest of the year.

According to the statutory instrument published on legislation.gov.uk, ministers have amended the temporary 2026 continuation order by replacing the 31 August 2026 end date with 31 December 2026. Without that change, the current fuel duty arrangements would have expired sooner. The same order also changes the rebate calculation in the 2022 rules for gas oil, certain kerosene, biodiesel and bioblend. The percentage addition to the rebate rises from 2.05 to 9.96, and the revised table shows the effective excise duty payable on the relevant entries falling from 10.18p to 6.48p per litre.

That second change is the more targeted one. It does not reopen red diesel to a wider group of users, and it does not roll back the tighter eligibility rules that have been in place for several years. What it does is improve the rebate for operators who already qualify under the existing system. For sectors where rebated fuel use remains lawful, that is a direct cost saving. For firms outside those permitted categories, there is no route back in through this order. The government is cutting the tax bill for eligible use, not rewriting the eligibility map.

For companies buying standard petrol or diesel, the benefit is simpler: no fresh fuel duty increase before 1 January 2027. That matters for hauliers, trades, field service firms, couriers and any SME whose margins move with pump prices. It is worth being clear about the limits, though. This is not a new broad-based fuel tax cut for every user. Most businesses will feel it as avoided cost rather than lower cost, which is still useful when transport bills feed quickly into pricing, delivery charges and staff travel.

The numbers are modest on paper but meaningful in volume. On the revised figures in the order, the effective duty charge for the affected rebated fuels drops by 3.70p per litre, from 10.18p to 6.48p. A business using 50,000 litres over the life of the measure would be looking at a saving of roughly £1,850 against the previous rate. That will not fix weak demand or soft project pipelines on its own. It will, however, slightly ease pressure on operators running machinery, generators, heating systems or specialist vehicles where rebated fuel use remains within the rules.

There is also a broader inflation angle. Fuel duty decisions feed into transport costs directly and into the wider cost base indirectly, especially where fuel moves goods or powers equipment. Extending the freeze is one way of avoiding another round of tax-led pressure in supply chains during the second half of 2026. The trade-off sits with the Exchequer. Every extra month of frozen duty and every extra percentage point of rebate means revenue forgone. The Treasury has decided, at least for now, that cushioning operating costs is worth more than taking the full tax yield immediately.

The wider policy picture is familiar. Rather than redesign the whole fuel duty system, ministers have chosen another temporary extension and a targeted rebate tweak. That is politically easier, but it keeps uncertainty in place for businesses trying to price contracts and set budgets for 2027. The Treasury says a Tax Information and Impact Note will be published on gov.uk, which should give firms a fuller view of the measure's revenue effect. Until then, the practical takeaway is straightforward: if a business only buys standard road fuel, this order mainly removes the risk of a near-term tax rise; if it lawfully uses rebated fuel, there is a clearer saving from 15 June 2026. Either way, this looks like a useful buffer for 2026, not a permanent reset.