Escalating Costs and Munitions Depletion in Iran War Deepen Economic Strain on Washington

The United States military campaign against Iran has reached an estimated cost of $38 billion and continues to accumulate roughly $3 billion in additional expenses each month, according to a detailed assessment published this week by the Congressional Budget Office. The findings underscore growing financial and strategic strains on Washington as the protracted conflict fuels domestic inflation and heavily depletes critical weapons stockpiles.

The nonpartisan budget office determined that the consumption of armaments accounts for the vast majority of war-related spending, with approximately $25 billion allocated to expended munitions alone. Analysts warned that restoring these domestic reserves to their pre-conflict levels could require up to five years, presenting acute national security vulnerabilities should the United States be drawn into another major geopolitical confrontation.

Economic consequences of the conflict are increasingly rippling through the broader American financial system. With the Strait of Hormuz—a vital maritime passage for international oil supplies—remaining subject to an Iranian blockade, energy markets have experienced significant volatility. The CBO projects that these sustained market disruptions will push domestic inflation upward by 0.5 percentage points during the opening quarter of 2027, compounding pressure on household expenses as the national debt surpasses a record $40 trillion.

The conflict, launched jointly with Israel on February 28, has significantly exceeded initial timeline estimates provided by the executive branch. While President Donald Trump initially asserted that military operations would conclude within four to five weeks, the campaign has now extended into its seventh month with no immediate end in sight.

The CBO’s $38 billion calculation aligns closely with figures presented by Defense Secretary Pete Hegseth during a Senate hearing on July 21, when he cited costs near $37.5 billion. However, congressional analysts noted that the total does not encompass several significant expenditure categories, such as debt-servicing interest, recent naval operations targeting vessels in the Strait of Hormuz, or repairs resulting from Iranian strikes on American facilities in the Middle East.

The congressional review was formally requested by Representative Brendan Boyle of Pennsylvania, the ranking Democrat on the House Budget Committee. Boyle sharply criticized the administration's strategic management of the campaign and disclosed that the Department of Defense declined to cooperate with the budget office's inquiries during the preparation of the report.

The CBO's economic evaluation follows the release of an internal oversight report from the Pentagon’s Office of the Inspector General, which offered the first official accounting of military losses and equipment depletion since hostilities commenced. That investigation calculated that between February 28 and June 30, direct military operations cost $33 billion, including $22 billion in consumed ordnance.

Significantly, the Pentagon watchdog's report marked the first formal acknowledgment by defense authorities that the military is confronting depleted inventories—particularly regarding defensive missile interceptors—alongside critical supply chain bottlenecks. The findings contrast with ongoing public statements from administration officials and President Trump, who had previously dismissed reports of shortages by claiming domestic ammunition supplies were virtually unlimited.

The inspector general's assessment also documented considerable human and material losses suffered by American forces during the initial four months of the campaign. The watchdog verified that Iranian counterstrikes resulted in the deaths of at least 18 U.S. service members, inflicted $184 million in structural damage to American military installations across the Gulf region, and damaged or destroyed dozens of aircraft, including at least 30 MQ-9 Reaper unmanned aerial vehicles.

Despite the published findings from both the congressional bookkeeper and the military's internal watchdog, spokespersons for the White House and the Pentagon have continued to dispute the severity of the munitions shortages described in the CBO report.

Political resistance to the prolonged military engagement is concurrently intensifying on Capitol Hill. In a notable legislative challenge to the administration, the House of Representatives voted for a third time on Tuesday to bring an end to the conflict, with seven Republicans crossing party lines to vote alongside a unified Democratic caucus. Three of those Republican lawmakers backed the anti-war resolution for the first time.

The legislative measure faces steep institutional hurdles, however, as it moves to the Senate, where Republican leaders hold a working majority and are expected to block the effort. Furthermore, even if the resolution were to secure approval across both chambers of Congress, the president maintains the executive authority to issue a veto.

The current conflict has also reignited legal debates over presidential war powers. Although the U.S. Constitution assigns Congress the formal authority to declare war, modern chief executives have routinely initiated foreign military operations under commander-in-chief authorities without prior congressional authorization, mirroring actions taken by President Harry Truman in Korea in 1950 and President Richard Nixon in Cambodia.

The confluence of economic disruption, strategic setbacks, and climbing casualties has severely eroded domestic support for the military intervention. Public approval for the war has dropped to 31 percent, creating a volatile political environment for the administration and congressional lawmakers as voter anxieties surrounding energy prices and the broader cost of living intensify ahead of the November midterm elections.