How Much Has the Iran War Cost? Pentagon Says $47.1 Billion

The Pentagon has told Congress that the war against Iran had cost the United States at least $47.1 billion by October 16, in an estimate compiled by U.S. Central Command. Replacing expended munitions accounts for about $29 billion of that sum, well over half of the total. The figure, provided to lawmakers this month, is $3.5 billion higher than the roughly $43.6 billion reported in early September, with operations accounting for about $11.9 billion and equipment losses for about $6 billion. The breakdown highlights that the Iran war, launched by the United States and Israel on February 28, has become above all a contest of magazine depth, with the bill driven far less by flying hours than by the precision weapons and interceptors that now have to be rebuilt.

The estimate is the latest in a series of official figures that has risen at every update since the spring. Pentagon comptroller Jules Hurst put the cost at $25 billion in late April, the administration gave $29 billion in May, and Defense Secretary Pete Hegseth told the Senate Appropriations Committee in July that it stood at $37.5 billion. The Congressional Budget Office estimated in a September 15 report that Defense Department costs had reached about $38 billion by August 1 and would keep growing by between $2 billion and $3 billion a month for as long as the fighting continued, a pace consistent with the $3.5 billion added in the six weeks since early September. Air Force costs are now listed at $7.6 billion and Army costs at just over $2 billion, while the Navy’s share fell to $1.45 billion from $2.2 billion in early September with no explanation given.

The weapons most in demand, and the stocks most heavily drawn down, are the defensive interceptors fired by the Army’s MIM-104 Patriot and THAAD batteries against Iranian ballistic missiles and drones aimed at U.S. bases and Gulf partners. By some estimates the United States held only 760 to 830 PAC-3 and PAC-3 MSE rounds in late July, roughly a third of the 2,330 it had before the war, a fall of roughly two thirds in the remaining Patriot stockpile in five months of fighting. A single THAAD interceptor carries a Missile Defense Agency flyaway price of about $12.7 million, well above a Patriot round. The fiscal 2027 request seeks $11.4 billion for 857 of them to restock the Army’s eight THAAD batteries. The White House is separately asking Congress to approve a $95 billion package to fund the war and other priorities.

The $47.1 billion total is expected to keep rising, with President Donald Trump having kept new strikes on Iran open as an option after the November 3 midterm elections and a third aircraft carrier and thousands of additional troops heading to the region. The Pentagon’s official tally stands at 21 service members killed and 865 wounded, 18 of the deaths caused by Iranian strikes, combat aircraft crashes or the disposal of Iranian drones. The estimate also leaves out the cost of repairing U.S. bases, which a Pentagon inspector general report released in September found had suffered damage or destruction to hundreds of buildings and other structures in Kuwait, Bahrain, Qatar, the United Arab Emirates, Saudi Arabia, Iraq, Oman and Jordan.