The Pentagon recently told Congress the Iran war has cost $43.6 billion so far — higher than the CBO's $38 billion estimate — but both figures omit major expenses. Key exclusions include tens of billions for repairing damaged bases, $1.5 billion requested in a supplemental appropriation, replenishing munitions, economic impacts and interest on the debt. Lawmakers and budget analysts warn these official totals are minimums, and they call for fuller Pentagon transparency so taxpayers and Congress can see the true cost.
Pentagon’s $43.6B Estimate Is A Start — But Leaves Out Tens Of Billions In Iran War Costs
The Pentagon on Aug. 6, 2026, in Arlington, Virginia.
Questions persist about how much the war with Iran is costing American taxpayers. Recent official tallies provide a clearer picture than before, but both independent and Pentagon estimates omit major categories of spending — leaving the public with a minimum, not a full accounting.
Last week the nonpartisan Congressional Budget Office (CBO) estimated the conflict has cost about $38 billion so far. That figure, however, was immediately shown to be incomplete: the CBO did not include expenses such as repairs to U.S. bases struck by Iranian attacks, the cost of replenishing depleted munitions stockpiles, broader economic impacts on Americans, or interest accrued on the national debt.
The CBO’s ability to produce a fuller estimate was further constrained, officials say, because the Defense Department declined to provide information the office requested.
In a separate update to Congress, the Pentagon offered its own tally: as of this month the war has cost $43.6 billion, the largest official estimate to date. According to reporting by Roll Call and CQ Roll Call, the Pentagon’s breakdown includes $11.2 billion in obligated operating costs — fuel, combat pay, aircraft operations, medical care, parts and similar expenses — plus $32.4 billion in unfunded replacement needs such as munitions and damaged aircraft.
That level of disclosure is notable: as The New York Times observed, this is the first unclassified Defense Department summary, after more than six months of war, to provide a service-by-service accounting and itemized line entries for damaged or destroyed weaponry. Yet multiple officials and congressional staff warn the Pentagon’s totals are almost certainly understated.
Not included in the $43.6 billion estimate are at least two major categories: an additional $1.5 billion the administration has requested in a supplemental appropriation for fuel and other wartime costs, and what officials say will likely be tens of billions of dollars to repair U.S. bases across several Middle Eastern countries that sustained heavy damage in Iranian strikes. The estimates also do not attempt to quantify broader economic effects on the U.S. public or the extra interest costs on the national debt caused by wartime borrowing.
Sen. Jack Reed (D-R.I.), ranking member of the Senate Armed Services Committee, said the administration "has hidden the true cost of this war from day one," adding that taxpayers "deserve to know what this war costs."
In short, both the CBO and Pentagon figures should be treated as minimums. Without fuller transparency from the Defense Department, Congress cannot fully exercise oversight or appropriation responsibilities, and taxpayers are left without a complete accounting of the war’s fiscal consequences. The overall price tag is likely considerably higher and continues to rise.
Note: This article synthesizes reporting from the Congressional Budget Office, the Pentagon, Roll Call, CQ Roll Call and The New York Times.
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