Congress Divided Over Gas Tax Holiday as Iran War Drives Fuel Prices Higher

The federal gas tax is 18.4 cents per gallon. The Iran war has added roughly $1.54 per gallon to the national average price of gasoline since fighting began eleven weeks ago [1]. The math is not in the gas tax holiday's favor — and Congress knows it.

On May 11, President Trump told CBS News he wanted to suspend the federal gasoline excise tax "for a period of time," framing the move as relief for American drivers paying an average of $4.52 per gallon at the pump [1][2]. Sen. Josh Hawley (R-MO) introduced legislation for a 90-day suspension with a presidential option to extend. Rep. Anna Paulina Luna (R-FL) announced companion legislation in the House [1].

But the proposal has landed in a Congress where support is shallow, opposition crosses party lines, and the underlying economics suggest most of the benefit would never reach consumers.

The Supply Shock Behind the Price Spike

The Iran conflict has produced the largest oil supply disruption in modern history. Before the war, roughly 20 million barrels per day transited the Strait of Hormuz — about one-fifth of global crude supply. By early April, that figure had collapsed to 3.8 million barrels per day under a U.S. naval blockade [3][4].

Source: IEA, EIA, CRS

Data as of May 14, 2026CSV

The scale dwarfs every prior Gulf crisis. The 1973 Arab oil embargo removed an estimated 4.4 million barrels per day from global markets. The 1990 Gulf War disrupted 4.3 million. Even the 2019 Saudi Aramco drone attack, which briefly knocked out 5.7 million barrels per day, was a fraction of the 16.2 million barrels per day disrupted at the peak of the Hormuz closure [4][5].

Iranian crude exports themselves fell from 1.85 million barrels per day in March to roughly 567,000 barrels per day under the blockade [5]. But the broader chokepoint effects were far larger: Saudi output dropped from 10.4 million to 7.25 million barrels per day, Iraqi production fell 66%, and Kuwait lost more than half its output [4].

The Consumer Price Index for gasoline surged 28.4% year-over-year through April 2026, according to the Bureau of Labor Statistics [6].

Source: BLS / Bureau of Labor Statistics

Data as of Apr 1, 2026CSV

North Sea Dated crude reached $130 per barrel, with physical cargoes trading $20–$30 above futures benchmarks [5]. Bloomberg NEF projects oil could remain above $91 per barrel through late 2026 if disruptions persist [7].

What 18.4 Cents Actually Buys

The federal gas tax has not been raised since 1993. It generates over $23 billion annually for the Highway Trust Fund, which finances road construction, bridge repairs, and transit projects across all 50 states [8][9].

The Penn Wharton Budget Model analyzed a 122-day suspension from June 1 to October 1, 2026, and found it would cost the Highway Trust Fund $11.5 billion — $8.44 billion from gasoline taxes and $3.06 billion from diesel [10]. That represents roughly 19% of the fund's annual spending authority.

Source: Penn Wharton Budget Model, CBO

Data as of May 12, 2026CSV

But the savings consumers would see are far smaller than the revenue the government would lose. Penn Wharton estimated a pass-through rate of 72% for gasoline and 60% for diesel — meaning refiners and retailers would capture between 28% and 40% of the suspended tax as additional profit margin [10][11].

At a 72% pass-through, the 18.4-cent suspension translates to about 13.2 cents per gallon at the pump. A household filling a 15-gallon tank weekly over the full 122-day period would save roughly $35 total on gasoline [10].

State-level data from 2022 supports this estimate. When Maryland, Georgia, and Connecticut suspended their state gas taxes that year, consumer pass-through rates ranged from 58% to 87%, with the savings eroding over time as retailers adjusted pricing [12][13].

"That 18 cents doesn't really amount to a whole lot" when prices are $1.50 higher than last year, said GasBuddy analyst Patrick De Haan [14]. Barack Obama made a similar point in 2008, calling a gas tax holiday "a gimmick that would save you half a tank of gas over the course of the entire summer" [15].

Who Bears the Burden — and Who Gets the Relief

The gas tax holiday provides a flat per-gallon discount, which means higher-income households that drive more and own larger vehicles capture a disproportionate share of the benefit. The households that need relief most are the ones least served by the policy.

Source: ACEEE, Argonne National Lab

Data as of May 1, 2024CSV

Households earning under $20,800 per year spend 18.3% of their income on gasoline, according to an analysis by the American Council for an Energy-Efficient Economy and Argonne National Laboratory [16][17]. That is more than four times the 4.1% burden borne by households earning over $100,000.

Hispanic households spend an average of 7.9% of income on combined energy costs — 42% above the national average. Black households spend approximately 6%, about 10% above average [16]. One in seven American families lives in energy poverty, defined as spending an unsustainable share of income on fuel and utilities [18].

A $35 savings over four months is a rounding error for a family spending $3,800 annually on gasoline out of a $20,800 income. A targeted cash transfer of equivalent cost would reach these households far more effectively — a point that critics of the holiday on both sides of the aisle have raised.

The Congressional Fault Lines

The gas tax holiday has created unusual political alignments. Some Democrats who would ordinarily oppose Trump are backing a version of the proposal, while prominent Republicans who typically defer to the president are raising objections.

Supporters across party lines: Sen. Mark Kelly (D-AZ) and Sen. Richard Blumenthal (D-CT) introduced their own suspension bill in March, through October 1, but with a key difference — their version includes revenue offsets to make the Highway Trust Fund whole [19][20]. "People are having a hard time driving to work, because they can't afford gas," Kelly said [19]. Rep. Chris Pappas (D-NH) introduced companion legislation in the House [19].

Republican skeptics: Senate Majority Leader John Thune (R-SD) publicly questioned whether savings would reach consumers or be "absorbed in the supply chain" [20]. Sen. Thom Tillis (R-NC) raised Highway Trust Fund solvency concerns, calling the suspension "a redirection of funds rather than addressing root causes" [20]. Sen. John Hoeven (R-ND) argued that controlling the Strait of Hormuz would make "a real difference" compared to tax tinkering [20].

Industry opposition from unexpected quarters: The trucking and construction industries — traditional Republican constituencies — are actively opposing the holiday because they depend on Highway Trust Fund spending for the roads and bridges their businesses require [21]. Speaker Mike Johnson (R-LA) called the idea "intriguing" but urged evaluation of "unintended consequences" [20].

Energy Secretary Chris Wright said the administration was "open to all ideas," including the suspension — language notably short of a firm endorsement [1].

The Economist Case Against

The strongest arguments against the gas tax holiday come not from partisan opponents but from nonpartisan budget analysts and economists who have studied previous attempts.

The Tax Policy Center called the proposal "a terrible idea," arguing that short-term consumer benefits are outweighed by inflationary pressure and deferred infrastructure investment [22]. The Bipartisan Policy Center's Andrew Lautz identified what he called a structural paradox: "The irony of a gas tax suspension is that the higher prices go, the less of an impact it has" [23]. When supply is constrained — as it is during a war that has closed the world's most important oil chokepoint — producers can absorb more of any tax cut because consumers have fewer alternatives.

The Tax Foundation has argued that lowering the relative price of gasoline encourages additional driving, partially negating supply-side relief at a moment when conservation would be more beneficial [22]. Penn Wharton found that drivers would purchase only "a gallon or two more" over a nine-month holiday, suggesting minimal behavioral change [10].

The Congressional Budget Office has projected that the Highway Trust Fund's highway account may lack sufficient funds by fiscal year 2028 even without a suspension [9]. The fund has already required repeated general-fund transfers to remain solvent as fuel-tax revenues — fixed at 1993 levels while construction costs have risen — failed to keep pace with obligations [8].

A suspension would accelerate that insolvency. No version of the Republican legislation includes a pay-for mechanism. The Democratic Kelly-Blumenthal bill proposes offsets but has not specified them in detail [19][20].

Alternative Policy Proposals

Several competing approaches have emerged, each with its own tradeoffs.

Windfall profits tax: Sen. Sheldon Whitehouse (D-RI) and Rep. Ro Khanna (D-CA) reintroduced the Big Oil Windfall Profits Tax Act in 2026. At $100 per barrel, the levy would raise approximately $33 billion per year, returned to consumers as quarterly rebates of roughly $216 annually for single filers (phasing out above $75,000 income) and $324 for joint filers (phasing out above $150,000) [24][25]. Oxfam International has projected that fossil fuel companies will earn $3,000 per second in 2026 [26]. The Tax Foundation has argued that windfall profits taxes create economic distortions and "should be left in the past" [27].

Strategic Petroleum Reserve releases: Japan released 80 million barrels from its strategic reserves — equivalent to 15 days of domestic demand — beginning March 16 [28]. The Center for American Progress has argued the Trump administration has not fully deployed this tool [29]. The tradeoff: oil sold from the SPR must be replenished, often at higher prices.

Targeted assistance: Several Democratic lawmakers, including Sens. Tim Kaine, Elizabeth Warren, Tammy Baldwin, and Ron Wyden, have argued that ending the Iran conflict is the most effective price relief — and that in the interim, targeted energy assistance for low-income households is more efficient than across-the-board tax cuts [20].

How Allied Nations Have Responded

The United States is not alone in grappling with Iran-driven fuel costs. The responses of allied nations offer a partial natural experiment in policy effectiveness.

Japan, which imported 94.2% of its crude oil from the Middle East before the war, capped retail gasoline prices nationwide by subsidizing wholesalers in addition to its 80-million-barrel strategic reserve release [28][30].

South Korea imposed a ceiling on refiners' wholesale gasoline and diesel prices and allocated $17.3 billion for oil refiners under price caps, cash vouchers for households, and aid for energy-affected businesses. Seoul is also considering limiting refined product exports to protect domestic supply [28][30].

European Union members committed over €10 billion in fossil fuel subsidies, while the European Central Bank postponed planned rate cuts, raised its 2026 inflation forecast, and cut GDP growth projections [31][32]. European civil society groups have pushed for windfall profit taxes on road fuel, where oil companies are expected to capture €24 billion in windfall gains in 2026 [33].

China capped domestic refined oil prices [28].

The Carnegie Endowment for International Peace has warned that fuel subsidies represent "an easy fix — and the wrong one," citing the 2022 precedent when global consumption subsidies exceeded $1 trillion and proved politically difficult to remove once enacted [34]. The IEA has recommended alternatives including enhanced transit access, four-day workweeks, and fuel rationing as more sustainable responses [34].

Follow the Money

The oil and gas sector spent $219 million in the 2023–2024 election cycle, with 88% of contributions flowing to Republicans — up from roughly 66% in 1992 [35][36]. President Trump received nearly $23 million from oil and gas interests. The industry deploys over $100 million annually in lobbying [36][37].

A study published in the Proceedings of the National Academy of Sciences, analyzing 28 years of congressional voting data, found that oil and gas companies tend to reward members of Congress after they vote against environmental legislation rather than trying to sway undecided votes — reinforcing existing allies rather than converting opponents [38].

This creates a complex dynamic around the gas tax holiday. The industry has reason to oppose the suspension: when the tax is lifted, refiners can capture a portion of the forgone tax as margin. An 18.4-cent reduction where only 72% passes through to consumers means roughly 5 cents per gallon flows to the supply chain — on 390 million gallons consumed daily in the U.S., that adds up [10].

Some industry-aligned Republican lawmakers have hesitated on a populist proposal from their own president — a pattern consistent with PNAS findings about how donor relationships shape legislative behavior [38].

What Comes Next

Congress has never enacted a federal gas tax suspension. Biden tried in 2022 and was blocked by his own party's leadership [15]. Trump's proposal faces an uphill climb through a Congress where the math — both fiscal and political — works against it.

The $35-per-household savings estimate has become a focal point for opponents. Hawley's response: "Every bit helps" [1]. But with 63% of Americans blaming Trump "a great deal" or "a good amount" for higher gas prices and 80% saying fuel costs strain their budgets, the political pressure to do something is intense — even if that something is, by most independent analyses, more symbolic than substantive [1][2].

The real question may not be whether the gas tax holiday passes, but what it crowds out. Every week Congress spends debating an 18.4-cent-per-gallon measure is a week not spent on the windfall profits tax, SPR strategy, or the diplomatic resolution that would address the root cause: a war that has taken 16 million barrels per day off the global market.