President Donald Trump issued a temporary waiver extending highway access to tax-exempt red-dyed diesel, a move intended to ease fuel costs for trucking operators and agricultural producers at a time when elevated pump prices have been weighing on businesses and households ahead of the midterm elections.

Signed on Monday, the order temporarily widened availability of red-dyed diesel — a fuel grade normally reserved for off-road equipment and exempt from federal highway tax requirements. The federal excise tax on highway diesel is set to be paused through the end of 2026, a decision that could reduce cost pressures on the transportation industry at a time when diesel prices have remained near elevated levels.

Though red-dyed diesel shares the same chemical makeup as the fuel available at roadside filling stations, the colouring agent embedded in it serves as a marker indicating that road-use levies were never collected on that product. Tractors, bulldozers, and similar off-road machinery are among the primary applications for this type of fuel.

Under federal rules, diesel fuel used on public roads carries an excise levy of 24.4 cents per gallon. Driving on public roads with dyed diesel in the tank has long been prohibited, and those found doing so face penalties tied to tax evasion offences. The directive grants truckers and farmers a short-term exemption allowing them to use the lower-cost fuel without running afoul of those existing restrictions.

White House estimates put potential per-tank savings for truckers at more than $100 under the plan — relief that, should the numbers hold, would reduce costs for an industry dealing with persistently high fuel expenses.

Nationwide diesel costs broke through the $6-per-gallon threshold for the first time on record in September, a milestone tied to constrained global fuel supplies amid ongoing conflict in both Ukraine and Iran. Because diesel powers the bulk of freight movement on roads nationwide, any uptick in pump prices for that fuel can filter through supply chains, putting upward pressure on what shoppers pay for groceries, household items, and other goods that arrive by truck.

Fuel costs for gasoline and diesel have climbed by roughly $700 million per day compared with the same period a year earlier, according to Bob McNally, who leads the energy consultancy Rapidan Energy. With November's midterm elections drawing near, the timing places both Trump and Republicans in a difficult political position.

Fuel and energy expenses have a way of working through supply chains until they show up in what families pay for food and other routine purchases, keeping household budgets under ongoing pressure.

Under the order, the Treasury secretary — working alongside the Defense Department — would hold off on collecting the federal highway diesel excise tax until the close of 2026, with no interest or penalties accruing in the interim. Direction was also given to Treasury staff to look into whether those postponed tax liabilities could be wiped off the books entirely rather than eventually repaid.

Tight global energy supplies linked to the conflict in Ukraine, a shortfall in refining capacity, and broader disruptions across international markets were the factors officials pointed to when explaining the rise in fuel prices. Pressure has also been applied through allied channels to expand the volume of supplies on offer.

The Group of Seven nations agreed to release 100 million barrels of oil and diesel from their strategic reserves, a decision that followed calls from Trump, who had also raised the prospect of curbing U.S. fuel exports as part of a broader effort to bring down prices at home. Prior to the federal action, a number of states had already loosened oversight of tax-exempt diesel during a period of climbing fuel prices, though the measure taken at the federal level extended that response more broadly.