U.S. Defense Secretary Pete Hegseth told lawmakers Tuesday that the war in Iran has cost the United States $37.5 billion so far [1].

The disclosure reveals a significant escalation in spending for the military campaign. The rising cost puts additional pressure on federal budget allocations and may influence future congressional funding decisions for the conflict.

Speaking on the Senate floor in Washington, D.C., Hegseth detailed the financial burden of the ongoing operations. He said the total cost is an increase of nearly $8 billion [2] since the last public estimate was released.

"The war in Iran has cost the United States $37.5 billion so far," Hegseth said [1].

The current figure is not limited to expenses already paid. Hegseth said that the $37.5 billion [1] total includes anticipated costs through Sept. 30, 2026 [3]. This projection allows the Pentagon to account for the resources necessary to sustain the campaign through the end of the current quarter.

"That figure includes anticipated costs through September 30," Hegseth said [3].

The briefing comes as the Defense Secretary seeks additional funds to maintain military operations. Hegseth said the increase of nearly $8 billion [2] reflects the evolving needs of the war effort.

"It’s an increase of nearly $8 billion since the last public estimate," Hegseth said [2].

The Pentagon's report provides the most recent financial snapshot of the conflict, though the total continues to climb as operations persist in the region.

“"The war in Iran has cost the United States $37.5 billion so far,"”

The sharp increase in estimated costs suggests that the U.S. military campaign in Iran is becoming more resource-intensive than previously projected. By including anticipated costs through September 30, 2026, the Pentagon is signaling to Congress that the current funding trajectory is insufficient and that the financial scope of the war is expanding.