In just 11 weeks, the U.S. military campaign against Iran has burned through $29 billion in taxpayer money, and the Pentagon cannot fully explain where all of it went. That updated figure emerged during a House Appropriations Defense Subcommittee hearing on May 12, 2026, as reported by the Associated Press, representing a $4 billion jump from the $25 billion estimate defense officials had given lawmakers just days earlier. Of that total, roughly $12 billion covers military equipment that has been destroyed or damaged, the single largest spending category and one the Defense Department has yet to break down in public.
The campaign has involved sustained U.S. strikes on Iranian military infrastructure, though the Pentagon has released limited public detail about specific targets or the full strategic rationale. What is clear from congressional testimony is that the operation has been munitions-intensive from the outset and has escalated in cost far faster than early projections suggested.
How the costs have escalated
The spending curve has been steep since the campaign’s opening hours. Unnamed U.S. officials estimated that the first two days of strikes in early March consumed $5.6 billion in munitions alone, straining existing stockpiles before the broader operation had fully ramped up. That figure, widely cited in early reporting, has not been officially confirmed by the Pentagon on the record and should be treated as unverified.
By late April, when Pentagon leaders appeared before the Senate Armed Services Committee, the official estimate had reached $25 billion. The hearing transcript shows the Pentagon’s comptroller acknowledging under questioning that even that number excluded uncertain costs tied to military construction and base reconstruction, meaning the real total was already higher than what was on the record.
Less than two weeks later, the House subcommittee session pushed the public figure to $29 billion. The increase traces largely to replacing expended munitions, repairing or writing off damaged equipment, and ongoing operational expenses like fuel, logistics, and deployed personnel costs.
For historical context, the Congressional Research Service has estimated that the first three months of the 2003 Iraq invasion cost roughly $22 billion in 2003 dollars, or approximately $38 billion adjusted for inflation to 2026. (These figures draw on CRS analyses of wartime supplemental appropriations; a specific report number for the estimate cited here has not been independently verified.) The opening months of the Afghanistan campaign in late 2001 ran at a significantly lower rate, roughly $1 billion to $2 billion per month, according to contemporaneous CRS and DOD budget reporting, though a specific source document for that range has not been independently verified. The scope, mission profiles, and munitions involved differ substantially across these conflicts, but the $29 billion price tag in just 11 weeks places the Iran campaign among the most expensive opening phases of any U.S. military operation in modern history.
The $12 billion equipment question
Of all the numbers in the Pentagon’s accounting, the $12 billion in lost or damaged equipment is drawing the sharpest scrutiny on Capitol Hill. No full transcript or line-item breakdown from the May 12 hearing has been released, so it remains unclear which platforms, vehicles, aircraft, or weapons systems make up that total. The Pentagon has not disclosed its valuation methods, and a detailed cost report that senators requested during the April hearing has not appeared publicly.
A recent Government Accountability Office audit adds another layer of concern. The GAO found that the Air Force fails to properly account for general equipment held by contractors, citing weaknesses in inventory visibility and tracking that predate the Iran campaign. If the Defense Department struggles to track contractor-held equipment during peacetime, its wartime loss assessments may carry significant blind spots. The $12 billion figure, in practical terms, may reflect what the Pentagon knows it has lost rather than what it has actually lost.
During the April Senate hearing, lawmakers pressed defense officials on exactly this tension. In Associated Press reporting on the exchanges, skeptical members challenged Pentagon witnesses to reconcile rising dollar figures with persistent uncertainty about what had been destroyed, damaged, or consumed. The confrontations have shifted the congressional debate from strategic questions toward something more basic: not whether the war is expensive, but whether the Defense Department can credibly account for where the money is going.
What the $29 billion does and does not cover
For taxpayers trying to make sense of the headline number, the most important caveat is that $29 billion is a floor, not a ceiling. The Pentagon’s comptroller has acknowledged on the record that the estimate excludes military construction and base reconstruction costs because those figures remain too uncertain to include. Those categories will almost certainly add billions more as the campaign continues and damaged facilities require repair or replacement.
The number also does not appear to account for long-term costs that typically follow military operations: veterans’ health care, equipment modernization to replace depleted stocks, and interest on any borrowed funds used to finance the campaign. Those downstream expenses, based on patterns from Iraq and Afghanistan, often dwarf the initial operational spending over time.
The strongest public evidence anchoring the current estimate comes from two direct congressional proceedings: the late-April Senate Armed Services Committee hearing, where the $25 billion baseline and its exclusions were documented in verbatim testimony, and the May 12 House Appropriations Defense Subcommittee hearing, where the updated $29 billion figure entered the record. These are primary sources, not secondhand accounts, and they represent the most reliable snapshot available as of late May 2026.
Why Congress is demanding an equipment-loss accounting before approving more funds
Congress is now pressing on two fronts. Appropriators want the detailed cost breakdown they requested in April, and oversight members want assurance that the Pentagon’s tracking systems can keep pace with the losses they are supposed to measure. The GAO’s pre-existing findings about inventory weaknesses give those demands added weight.
The more immediate question is money. The administration has not yet sent Congress a formal supplemental appropriations request to cover the campaign’s costs, though defense officials have signaled that one is forthcoming. Without supplemental funding, the Pentagon would need to pull from existing accounts, potentially disrupting readiness, training, and maintenance budgets across the force. How quickly that request arrives, and how large it is, will be the next concrete test of whether the $29 billion figure holds or continues to climb.
If the Defense Department cannot produce a credible equipment-loss accounting in the meantime, the $12 billion figure will remain an estimate built on incomplete data. And the true cost of the campaign will stay out of public view even as the spending accelerates.
Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
