The Center for Strategic and International Studies estimated that the first 100 hours of the U.S. operation against Iran cost $3.7 billion. The analysis said this is equivalent to an average of $891.4 million per day. CSIS said less than $200 million of that amount consists of operating costs covered by the Defence Department’s current budget. The remainder was said to stem in part from heavy use of weapons and the need to replenish them. The analysis said most of those costs are not included in the budget and may require additional Pentagon funding. The authors of the estimate did not cite official U.S. government figures on the total cost of the operation at this stage. The report noted that further costs will depend on the intensity of the action and the duration of the operation. CSIS did not provide a forecast of the war’s overall cost.
