US Iran War Costs $38 Billion, Causes Munitions Shortage

A Pentagon inspector general report and Congressional Budget Office estimates released in September 2026 say the US war with Iran has cost $38 billion so far, with costs forecast to rise by $3 billion a month. The Pentagon report also confirms a shortfall in US munitions stocks as a result of the war.

The UN has confirmed a US strike on a wedding in Iran and challenged claims that civilians were not targeted. The war has also left US Middle East basing plans uncertain, according to the Pentagon. A US-UK advisory separately warned that Iran is using spyware to target dissidents.