Given this, we request the following information to inform the Senate’s decision-making by September 30, 2026. Cost of the Iran War: Please provide a detailed breakdown for the cost of military operations against Iran to date, inclusive of all direct and indirect costs attributable to the conflict. This should include damage to military installations, aircraft, and equipment; cost to refurbish deployed ships and aircraft; and expected benefits for veterans. $67 Billion Iran War Supplemental: Please provide a breakdown of the Administration’s supplemental request, including a detailed accounting for each major funding category and estimated expenses for the war in Iran. This breakdown should identify which portions of the request are intended to reimburse costs already incurred, which are intended to fund anticipated future operations, and which are unrelated to military operations against Iran. Please also note potential future funding requirements not included in the request, such as repairing military installations. One Big Beautiful Bill Act Funding: Please provide a detailed accounting of how the $34 billion remaining from the One Big Beautiful Bill Act will be spent, on what timeline, and whether any of these funds will support operations related to the Iran war.
Demand that the Department of Defense provide Congress with detailed information on the human and economic costs of the Iran War, including operation costs, the $67 billion supplemental request, and remaining One Big Beautiful Bill Act funding, by September 30, 2026.
Occurrences
Evidence
unverified · Source version 61903 · locator unknown
Given this, we request the following information to inform the Senate’s decision-making by September 30, 2026. 1. Cost of the Iran War: Please provide a detailed breakdown for the cost of military operations against Iran to date, inclusive of all direct and indirect costs attributable to the conflict. 2. $67 Billion Iran War Supplemental: Please provide a breakdown of the Administration’s supplemental request, including a detailed accounting for each major funding category and estimated expenses for the war in Iran. 3. One Big Beautiful Bill Act Funding: Please provide a detailed accounting of how the $34 billion remaining from the One Big Beautiful Bill Act will be spent, on what timeline, and whether any of these funds will support operations related to the Iran war. Mazie K. Hirono United States Senator
unverified · Source version 61905 · locator unknown
Slotkin and the senators are requesting that the Department of Defense provide: 1. A detailed breakdown of all direct and indirect costs of military operations against Iran to date, including damage to installations, aircraft, and equipment. 2. A full accounting of the $67 billion supplemental request, specifying what covers past costs versus future operations. 3. A detailed plan for how the Pentagon intends to spend the remaining $34 billion from the One Big Beautiful Bill Act.
verified · Source version 73857 · locator 1390
The Iran war has cost $43.6 billion as of this month, the highest official estimate to date, the Pentagon told Congress’ defense oversight panels this week.
verified · Source version 73859 · locator 7284
To estimate DoD's costs, CBO relied on government databases and public reports because DoD did not respond to CBO's requests for information.
Assessments
The verified commitment requested a detailed Department of Defense accounting by September 30, 2026. Verified evidence shows some information reached Congress, specifically a $43.6 billion Pentagon cost estimate, but it does not establish that the full requested breakdown of war costs, the $67 billion supplemental, and remaining One Big Beautiful Bill Act funds was provided. CBO also reported that DoD did not respond to its information requests, supporting that transparency remained incomplete. Because the verified delivery evidence does not tie the partial information to Hirono's material contribution, the outcome remains unresolved rather than partial or delivered.