The financial toll of the US-Iran conflict has reached at least $38 billion, with critical missile defence systems left severely depleted and requiring up to five years to replenish, according to a damning new assessment from the Congressional Budget Office (CBO).
The non-partisan analysis, requested by Democratic Congressman Brendan Boyle, reveals that the war has not only strained America’s defence budget but also exposed significant vulnerabilities in its military preparedness, particularly concerning potential future conflicts in the Taiwan Strait.
Munitions Drain and Strategic Shortfalls
Much of the $38 billion price tag stems from missile defence operations, with Patriot, Thaad, and Navy interceptor systems expended at alarming rates to counter Iranian ballistic missiles and drones. CBO estimates that replacing these weapons has cost $13.1 billion alone, while total munitions expenditure stands at $21.7 billion.
The Pentagon’s own inspector general recently confirmed that $22.3 billion was spent on munitions through June 30th, bringing total war-related spending to $33.4 billion. However, the defence department’s report stopped short of addressing internal investigations into controversial strikes, including the deadly Minab school attack that claimed 156 lives, among them 120 children.
“The large expenditure of missile defence interceptors will leave the United States with a reduced inventory for several years,” the CBO noted, adding that rebuilding current stockpiles “would probably take at least five years, even if production was increased.”
Inflationary Pressure and Hidden Costs
Beyond direct military expenses, the conflict has triggered broader economic consequences. Disrupted oil shipments through the Strait of Hormuz have driven energy costs upward, contributing to a half-percentage-point increase in inflation. Brent crude prices surged from $64 to $103 per barrel during peak hostilities.
CBO projects that inflation will remain 0.5 percentage points higher than previously forecast through early 2027, with short-term interest rates already 0.2 points above baseline projections. These secondary effects compound the immediate fiscal burden borne by American taxpayers.
White House officials have disputed some findings, with Defence Secretary Pete Hegseth dismissing reports of depleted stockpiles as “not true” and President Donald Trump claiming the US possesses “far more munitions than anyone in the world.” Yet CBO’s analysis suggests otherwise, painting a picture of stretched resources and overextended capabilities.
Taiwan Concerns and Budget Implications
The interceptor shortage poses particular risks for future military engagements. CBO warns that any confrontation over Taiwan could prove especially problematic, given China’s expanding missile arsenal and the need for rapid deployment of defensive systems across the Pacific theatre.
In June, the White House requested $87.6 billion in supplemental funding, with $67.1 billion allocated to the Pentagon. After removing funds deemed unrelated to combat operations—such as cybersecurity initiatives and classified programs—approximately $42.3 billion ties directly to the Iran conflict, representing roughly 10% above CBO’s independent estimate.
A significant portion of this request includes $12.1 billion for classified programs that CBO could not scrutinise, marking an unusually large share of secret funding compared to previous wartime appropriations. The agency also acknowledged its inability to calculate repair costs for bomb-damaged bases or project future diplomatic and foreign aid expenditures tied to the war.
Political Fallout Ahead of Midterms
The timing of CBO’s report—just weeks before crucial midterm elections—threatens to intensify political debates over military spending and presidential authority. Republicans face mounting pressure on multiple fronts, as voters grapple with soaring defence costs amid persistent concerns about inflation and national security.
Iranian strikes have damaged or destroyed hundreds of structures across US installations in Kuwait, Bahrain, Qatar, the UAE, Saudi Arabia, Iraq, Oman, and Jordan, underscoring the operational scope of hostilities. Each passing month adds roughly $3 billion to the cumulative expense, according to CBO projections based on current intensity levels.
Why it Matters
This CBO assessment delivers a stark warning about the long-term consequences of sustained military engagement in the Middle East. Beyond immediate budgetary pressures, America’s missile defence capabilities now operate below optimal readiness, creating strategic gaps at a time when geopolitical tensions simmer across multiple flashpoints—from the Taiwan Strait to Eastern Europe. The war’s inflationary impact further complicates economic policymaking, forcing difficult trade-offs between national security imperatives and domestic prosperity. For investors, defence contractors may see windfall revenues, but broader market volatility persists as energy prices fluctuate and interest rate expectations shift. Politically, the report arrives at a pivotal moment, potentially reshaping electoral dynamics and reigniting debates over America’s role as global policeman. The true cost of conflict extends far beyond today’s headlines, shaping fiscal realities and security postures for years to come.
