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CBO Estimates Iran War Cost $38B Through Aug. 1

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War Inflation Burden
  • The Congressional Budget Office released a report on Sept. 15, 2026 estimating U.S. combat operations against Iran cost $38 billion through Aug. 1, 2026.
  • House Democrats, led by Rep. Brendan Boyle, requested the estimate to expose the war’s taxpayer burden ahead of the 2026 midterm elections.
  • CBO says the war will add 0.5 percentage points to Q1 2027 inflation from reduced oil shipments.
  • Monthly $2-$3 billion defense spending will persist while interceptor stockpiles need five years to rebuild.
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