Reuters, citing calculations by the U.S. Congressional Budget Office, reported that Iran’s six-month war has cost the United States $38 billion so far, and that this figure will increase by about $3 billion per month.

According to the report, the costs have been calculated through August 10, and the war is expected to raise the United States’ inflation rate by 0.5% in the first three months of 2027.

The Congressional Budget Office said that most of the costs stem from the rapid consumption of munitions, and that rebuilding arms stockpiles could take five years. Reuters had previously reported that the United States has “practically all” of its precise long-range missiles consumed.

This cost estimate does not include the estimated cost of recent attacks on ships in the Strait of Hormuz, attacks on U.S. military facilities, or borrowing costs to finance the war.

U.S. Defense Secretary Pete Hegseth had previously called for nearly $90 billion in emergency funding to rebuild munitions stockpiles.

This assessment was carried out at the request of Brendan Boyle, a Democratic lawmaker. He said the war has cost tens of billions of dollars for American taxpayers so far.