Defense Secretary Pete Hegseth told Congress on July 21, 2026 that the US war with Iran has cost $37.5 billion so far — up from $25 billion reported in April. The Trump administration is requesting as much as $70 billion more in emergency military spending to sustain the conflict and expand weapons production, signaling the Pentagon expects the war to continue at significant cost. The actual total may be higher, according to expert analysis, and some congressional funding is set to dry up within weeks.