HM Treasury has confirmed that the fuel duty freeze will now run until 31 December 2026, extending the timetable that had previously pointed to an end date of 31 August. According to the statutory instrument published on legislation.gov.uk, the new Order was made on 21 May 2026, laid before the House of Commons on 22 May, and comes into force on 15 June 2026. For businesses, the practical message is clearer than the legal drafting. A possible late-summer change in fuel duty has been pushed back to the end of the year, giving firms more certainty over operating costs during the second half of 2026.

The Order amends an earlier 2026 instrument so that the temporary continuation of the 2022 fuel duty arrangements now lasts until the end of December. Related dates that had been set for 1 December 2026 are moved to 1 January 2027, keeping the current structure in place for longer. That matters across the real economy. Hauliers, delivery firms, agricultural operators and construction businesses all watch fuel tax closely because even small duty changes can feed quickly into transport bills, plant costs and quoted prices for customers.

The second part of the measure is more targeted. The explanatory note on legislation.gov.uk says the Order makes a temporary further reduction to the rebated rate for red diesel by increasing the rebate adjustment on certain fuels from 15 June 2026 until 31 December 2026. In legal terms, the rebate addition for gas oil, certain kerosene, biodiesel and bioblend rises to 9.96%, up from 2.05%. The legislation also updates the corresponding figure in Table C to 0.0648 from 0.1018, reflecting the temporary adjusted amount of excise duty payable after the rebate change is applied.

For firms still entitled to use rebated fuel, that is a meaningful if time-limited saving. It gives eligible users a little more room on running costs at a point when many businesses are still dealing with tight margins, uneven demand and patchy pricing power. It is also worth being precise about what has changed. This is not a wholesale rewrite of fuel taxation. It is a temporary increase in the rebate for specified products, sitting alongside a broader extension of the existing fuel duty freeze.

The wider business effect is likely to be steadier rather than dramatic. Fuel duty is only one part of the final price paid for diesel and petrol, with wholesale oil prices, refining costs, distribution, retailer margins and VAT all still doing heavy lifting. Even so, keeping duty flat removes the risk of an extra tax rise feeding into costs this summer. That matters most for firms that cannot easily absorb higher transport bills. In sectors where fuel is a visible line in the budget, stability on duty can support pricing decisions, protect cash flow and reduce the need for frequent revisions to customer quotes.

There is also a useful policy point in the background. Under the Excise Duties (Surcharges or Rebates) Act 1979, orders of this type lapse after a year unless they are actively continued. The explanatory note says the 2022 Order has already been rolled forward by further instruments in 2023, 2024, 2025 and earlier in 2026. So this latest move looks less like a new tax direction and more like another extension of a temporary stance. Businesses get visibility through to 31 December 2026, but there is still no long-term answer here on how fuel duty and rebated fuel policy will look beyond that point.

For finance teams, the next step is fairly practical. Budgets that had left room for a possible duty change after August can now be updated through the Christmas period, while eligible rebated-fuel users can build in the stronger rebate from 15 June. HM Treasury says a Tax Information and Impact Note will be published on GOV.UK. Until then, the Order itself gives the clearest reading of policy: ministers are opting for short-term cost stability on fuel, while leaving the bigger debate about future duty rates for another day.