Record US Diesel Prices Squeeze Farm Budgets as Washington Weighs Relief Options

US diesel prices have hit an all-time record during the 2026 harvest season, forcing the Trump administration to search for relief measures even as analysts and energy officials warn that the most politically popular option — banning diesel exports — would likely raise prices rather than lower them.

Record prices at the worst time

The Energy Information Administration's weekly on-highway diesel average reached $6.53 for the week of 21 September 2026, according to AgBull, surpassing the prior nominal record of $5.81 set in June 2022 after Russia's invasion of Ukraine. AAA put the national average at $6.50 on Friday, 25 September, more than $2.80 above the same point a year earlier. EIA's year-to-date average of $4.97 is already $1.31 above the full 2025 average.

The price surge has two origins, according to the AgBull analysis. The first followed US and Israeli strikes on Iran in late February 2026, which disrupted shipments through the Strait of Hormuz and damaged regional refineries; the EIA national average jumped from under $3.90 on 2 March to $4.86 on 9 March and topped $5.60 by early April. Ukraine's ongoing campaign against Russian refineries contributed a second, slower supply loss. Prices eased through June before a second leg began in mid-July, accelerating into September when harvest demand met low inventories and strong export demand.

Structural surplus, global pricing

The United States produces substantially more diesel than it consumes domestically. The American Action Forum estimates US refiners produce roughly 5.3 million barrels per day against domestic demand of about 3.6 million barrels per day, with exports near 1.5 million barrels per day — approximately one-fifth of global seaborne diesel trade. AgBull's analysis notes that this structural surplus is precisely why domestic prices have tracked world prices upward: when overseas buyers lose Middle Eastern and Russian supply, they bid for US cargoes, forcing domestic buyers to match those bids.

US distillate stocks stood at 106.3 million barrels in early September, near the low end of their long-run history. EIA had warned a year earlier that low distillate inventories raise the risk of price spikes during the fall harvest and winter heating season — both demand peaks now lie immediately ahead of a market already under pressure. Refinery closures, including LyondellBasell's Houston plant in 2025 and two scheduled California closures, have trimmed domestic capacity at the margin.

Export ban weighed, then set aside

Farm-state Republicans, including Senator Chuck Grassley and Representative Ashley Hinson of Iowa and Nebraska Governor Jim Pillen, pressed for a halt to exports, and Senate Majority Leader John Thune said he was open to exploring one. The administration drafted a 90-day ban before Energy Secretary Chris Wright and the oil industry pushed back.

Analysts cited by AgBull argue the mechanics of a ban are unfavourable. US refining and export capacity is concentrated on the Gulf Coast, while New England and the West Coast depend on waterborne supply due to limited pipeline capacity. A ban would trap barrels on the Gulf while doing little for import-dependent regions, and analysts expect refiners would cut overall output — reducing diesel, gasoline and jet fuel simultaneously.

Rapidan Energy's Bob McNally described the likely outcome as brief regional relief followed by higher prices than would otherwise prevail, plus a global price surge. An industry executive told CNBC that a ban could add roughly 30 cents per gallon. Bloomberg Intelligence analysts Brett Gibbs and Justin Teresi reached a similar conclusion, finding that a ban could bring short-term relief, particularly on the East Coast, but that the resulting glut would force refiners to cut output and could push prices even higher, with effects running through agriculture, trucking and jet fuel. The American Petroleum Institute also warned that a ban would raise prices.

Pulling one-fifth of seaborne diesel off the world market would also squeeze European buyers that have leaned on US diesel to replace Russian supply, and the timing would follow shortly after President Trump hosted Chinese President Xi Jinping in Washington, AgBull noted.

Options under review

With a flat export ban set aside, the White House is working through narrower measures. These include wider distribution of tax-exempt dyed diesel, pressure on states to reduce diesel excise taxes, and voluntary relief from refiners, with Energy Secretary Wright pressing companies on the latter. A Jones Act waiver first issued 17 March and extended in August already covers diesel and heating oil, though each voyage requires a Maritime Administration vessel-availability survey and cargoes must load by 11:59 p.m. Eastern on 15 November.

The tax options face a scale constraint. The federal excise tax on diesel is about 24 cents per gallon; even removing it entirely would offset less than a tenth of the roughly $2.80 per gallon increase from a year ago. A full federal tax holiday would require congressional action that Republican leaders have effectively ruled out before the midterm elections. A federal fuel-tax holiday was listed as very unlikely before midterms in the administration's option review as of 25 September.

States act ahead of Washington

Several governors moved without waiting for federal action. Nebraska Governor Pillen signed two executive orders on Thursday, 25 September: the first allows highway-registered vehicles to hold, sell or use untaxed dyed diesel without state penalties and makes state diesel taxes paid while hauling seasonal crops and livestock refundable for 90 days; the second provides weight-limit relief for crop transport. Alabama Governor Kay Ivey directed state law enforcement to halt enforcement of dyed-diesel rules for 120 days through 15 November and asked the state revenue department to seek IRS relief from federal dyed-diesel penalties.

AgBull notes a key limitation: state officials can suspend state-level enforcement, but federal penalties for using dyed fuel on public roads remain in force unless the IRS acts separately. That gap is one area where White House action could make state measures materially more effective.

Farm-level impact

USDA's September 2026 farm income forecast puts fuel and oil spending at $21.6 billion for the year, up $4.8 billion or 28.8% from 2025. Fertiliser is forecast at $39.6 billion, up 15.3%, and total production expenses at $492.8 billion. USDA projects net farm income of $158.4 billion, down 5.5% from 2025 after adjusting for inflation.

Penn State Extension estimates that no-till corn and soybean production uses less than 3 gallons of diesel per acre, making the direct per-acre field impact relatively modest, though AgBull notes this compounds across large operations and is amplified by conventional tillage, grain drying, irrigation and long hauls to terminals. Penn State Extension puts the added hauling cost at $0.16 to $0.20 per mile for each one-dollar rise in diesel. Wider basis at grain elevators passes fuel surcharges back to producers, and the elevated input costs are expected to carry forward into 2027 planning budgets.

Political context

AgBull characterises the debate as an economic argument against a ban and a political argument for one, with midterm season rewarding visible action and a growing number of lawmakers calling for a ban. The analysis notes that diesel has become a midterm issue in states where Republicans face competitive races, including Nebraska, Michigan and Wisconsin. The farm-state and oil-state wings of the Republican Party are in tension, with the former pressing for an export ban and the latter warning of industry harm — a strain that AgBull says explains the White House preference for measures that shift the burden to states and refiners.

A White House plan could come as early as the week of 29 September, but no final decision had been announced as of 25 September 2026.