The economic impact of the U.S. engagement in the Iran war is being felt heavily by ordinary consumers.

According to a recent study from Brown University, since the outbreak of the conflict under the Trump administration, U.S. consumers have incurred over $41.5 billion in extra fuel expenses, averaging about $316 per household. Concurrently, gasoline and diesel price increases in the United States are the highest among the G7 nations, with inflationary pressures spreading to sectors such as food and airfare, posing a growing political challenge for the administration.

In response to the energy shock, the government has utilized a record amount from the Strategic Petroleum Reserve, relaxed fuel transportation and environmental regulations, and proposed a suspension of the federal fuel tax. However, the former president stated last week that domestic inflation pressures would not influence his decision to end the conflict "in the slightest."

$41.5 Billion: Equivalent to Repairing the Nation's Bridge Network

Research from Brown University's Watson Institute for International and Public Affairs indicates that, as of last Sunday, the Iran war has resulted in $41.5 billion in additional fuel costs for American consumers. This figure exceeds the entire $40 billion budget of the federal bridge investment program, surpasses the $31.5 billion required to fully rebuild the U.S. air traffic control system, and is more than double the $18.9 billion federal electric vehicle charging infrastructure project terminated by the Biden administration.

"As a nation, we are spending such a massive amount on extra fuel costs, funds that could have been used to improve America's transportation infrastructure—frankly, those facilities do need attention," said Jeff Colgan, a political science professor at Brown University.

Since the Iran conflict began in late February, the Strait of Hormuz, through which about one-fifth of global oil supply passes, has largely been closed. Tightened supply has driven the international benchmark Brent crude price up by over 50%, to around $110 per barrel.

Data from the American Automobile Association (AAA) shows that U.S. retail gasoline prices have risen by 51% to $4.51 per gallon, while diesel prices have surged by 54% to $5.65 per gallon, nearing record highs. Both increases are the highest among G7 countries.

Rising Inflation and Bond Market Pressure

Increasing energy costs are transmitting throughout the broader economy. In April, the U.S. Consumer Price Index recorded its fastest growth rate in three years, and wholesale price increases were the highest since 2022, comparable to the inflationary shock at the onset of the Russia-Ukraine conflict.

Inflationary pressures are simultaneously raising debt costs. Last week, the yield on the 30-year Treasury bond issued by the U.S. Treasury reached 5% for the first time since 2007, reflecting investor concerns over persistently high inflation.

Despite widespread public discontent over high energy prices, the government's policy response has been limited. Measures include the record release of strategic petroleum reserves, relaxation of environmental regulations related to fuel, and a proposal to suspend federal gasoline and diesel taxes.

However, remarks made last week drew market attention. He stated to the media: "I'm not thinking about Americans' financial situation. I don't think about anyone. I'm only thinking about one thing—we cannot let Iran have nuclear weapons. That's it."

Polling data indicates that the war is unpopular among American voters and has negatively impacted approval ratings, which are currently near historic lows. A recent poll showed that 58% of Americans are dissatisfied with the handling of cost-of-living issues.