U.S. spending on the 2026 military campaign against Iran reached roughly $40 billion, according to calculations by CNN journalists.

The figure includes the cost of munitions used during the operation, equipment losses and damage inflicted on U.S. military bases. Operating costs that had already been included in the budget were not counted in the final total.

Munitions became the largest expense for Washington, accounting for about $26 billion. These costs were linked to the tactics used by the U.S. military, which relied heavily on long-range, high-tech and expensive weapons.

The United States used around 1,000 Tomahawk missiles during the campaign. Each missile is estimated to cost about $2.5 million.

In the first 100 hours of U.S. involvement alone, Washington spent approximately $3.7 billion. Daily combat costs later began to fall as the intensity of the strikes decreased.

As CNN noted, the White House ultimately had to sign a peace memorandum that includes, among other provisions, another 60 days of negotiations.

The document also provides for the reopening of the Strait of Hormuz, the lifting of the blockade on Iranian ports, temporary relief for Tehran from oil sanctions, talks on unfreezing Iranian assets and the return of nuclear inspections. Iran, for its part, pledges not to develop nuclear weapons or expand its nuclear program during the negotiation period.

As a result, after spending $40 billion, U. S. President Donald Trump arrived at an arrangement that closely resembles the 2015 deal reached with Iran under then-President Barack Obama. Trump had sharply criticized that agreement.