Summary
President Donald Trump has called for suspending the federal gasoline tax as steep fuel prices strain household budgets amid the war with Iran. The idea has also attracted attention from lawmakers, some of whom have proposed legislation that would pause the tax through Oct. 1, but the president has not specified how long a suspension would last.
Economists say the main expectation—that suspending a fuel tax will quickly translate into lower prices at the pump—may not match how the tax system actually works. The federal gas tax does not get collected at retail; it is collected earlier in the supply chain, meaning any relief would likely reach consumers later and not fully.
The federal gasoline tax is about 18.4 cents per gallon, but drivers would not necessarily see that full amount immediately shaved from what they pay, said Carl Davis, research director at the Institute on Taxation and Economic Policy. “You can’t suspend the tax and then expect everyone to wake up the next morning and gas is suddenly 18 cents cheaper,” Davis said. He added that the question is whether any wholesale tax savings get passed down to consumers during temporary holidays.
Davis said the pass-through is uncertain, pointing to what he has seen at the state level, where temporary tax changes can provide limited relief and may take time to trickle down—or fail to reach drivers meaningfully. Analysts also said suppliers could keep some of the savings to protect profit margins rather than cut prices by the full amount of the tax.
Penn Wharton Budget Model estimates that about 72% of a federal gas tax cut would reach consumers. On that basis, the model projects that the consumer-facing portion would amount to about 13.2 cents per gallon of the full 18.4-cent federal rate, and that even then the dollar benefit for typical drivers would be modest in the short term. For example, if the federal gas tax were suspended from June 1 through Oct. 1, the model estimates a household filling a 15-gallon tank once a week would save about $35 over the four months.
At the same time, U.S. gas prices remain much higher than earlier in the year, with the national average around $4.50 a gallon on Monday, according to AAA, compared with $2.98 in late February. Davis said those higher prices could make it difficult for many drivers “to even notice” a tax cut if it is delivered only partially and with delays.
Trump has acknowledged that the federal tax accounts for only a small share of what Americans pay for gasoline, while telling reporters on Monday that “it’s still money.” He and supporters argue that relieving the tax could provide needed support for families and businesses facing higher energy costs, especially as the war has contributed to higher prices for oil and other core commodities.
The policy debate also turns on what happens to government revenues if the tax is paused. The federal gas tax is the single biggest source of revenue for federal highway and public transit programs, and suspending it could reduce cash flows for those uses. Penn Wharton Budget Model estimated to the AP on Monday that at current fuel price and demand levels, the federal government could lose $8.35 billion in revenue over the course of a four-month suspension, and that the figure could climb to closer to $11.5 billion if the federal tax on diesel—24.4 cents per gallon—is also paused.
Some proposed legislation would try to offset Highway Trust Fund revenue losses with general funds, but critics warn that could raise the federal deficit and potentially threaten long-term infrastructure sustainability. Experts also note that the federal gas tax rate has remained unchanged since 1993, a change that they say has already reduced the Highway Trust Fund’s purchasing power when accounting for inflation. With exact proposal details still unsettled, Davis said the consequences would likely depend on how Congress handles revenue and spending tradeoffs, warning that higher debt and lower long-term funding for roads and bridges could follow. “Eventually there will be a consequence.”
Beyond the federal level, states levy their own gas taxes, and some have already taken temporary actions to try to respond to higher prices during the war. The rates range from 9 cents a gallon in Alaska to nearly 71 cents in California, according to government data at the start of the year, and several states—including Indiana and Georgia—have recently implemented temporary suspensions, while Kentucky and Utah have reduced levies.
However, experts said it may be difficult for other states to follow suit because states typically must balance their budgets annually. They also use fuel tax revenue for purposes beyond transportation infrastructure, including funding education, environmental initiatives and other public programs, which can make suspensions more complex at the state level.
Finally, analysts said gasoline prices depend on multiple factors, with taxes and demand shifts interacting with commodity costs. State and federal taxes, seasonal demand and the cost of fuel blends needed for warmer weather all play a role, but the cost of crude oil—the main ingredient in gasoline—drives a large part of the final price. Despite government efforts worldwide to boost supply, steep oil prices have persisted during the war, with both Brent and U.S. crude trading above $100 a barrel, up from roughly $70 just months earlier, according to the AP report.
U.S. and international attention has focused on the Strait of Hormuz, through which a fifth of the world’s oil once passed, as Tehran and Washington remain in a standoff and ceasefire talks continue to stall. Analysts have warned that if the conflict disrupts supply chains for long enough, prices for gas and other goods could keep rising. Davis said in response that “This is really a foreign policy problem,” adding that “There’s not a fiscal policy band-aid that can be slapped on.”