Iran war has cost Pentagon $38 billion and depleted missile stockpiles, CBO says

A new Congressional Budget Office report says the U.S. war with Iran has cost the Pentagon about $38.1 billion through Aug. 1 and could add another $2 billion to $3 billion for each additional month of fighting. CBO estimates that more than half of the total came from replacing missiles and other munitions used during the conflict. Higher flying hours added $10.4 billion, while fuel price increases contributed $2.7 billion. The report also warns that the war has consumed as much as two-thirds of the nation’s missile-defense interceptors since June 2025, which CBO links to U.S. support for defending Israel against Iranian attacks. CBO cautioned that rebuilding interceptor inventories would likely take at least five years, and could be especially problematic against a missile-heavy adversary such as China, or in a potential conflict over Taiwan.