The Congressional Budget Office (CBO) estimates the Iran war has already cost $38 billion and could increase by about $3 billion per month going forward. CBO forecasts that inflation would rise by roughly 0.5% during the first three months of 2027, citing pressure from higher energy prices and strain on defense supply needs.
The CBO assessment also points to shortages and replenishment challenges tied to the use of munitions. One report says a rapid drawdown could take as long as five years to rebuild United States stockpiles, which in turn can affect costs. Across the sources, the coverage focuses on the same headline figures—total costs, the monthly rate, and the near-term inflation outlook—while differing mainly in how they highlight the supply-chain or munitions-replenishment implications.
