Cost to US for war on Iran is $3.7bn in first 100 hours, says think tank

Most of the costs are not budgeted for, meaning the Pentagon will need to request more funding soon, researchers say.

The United States-Israeli war on Iran is estimated to have cost Washington $3.7bn so far in its first 100 hours alone, or nearly $900m a day, driven largely by the huge expenditure of munitions, according to new research.

An analysis by Washington-based think tank the Center for Strategic and International Studies (CSIS) underlined the colossal cost of the war, which entered its seventh day on Friday, as the US attacks Iran with stealth bombers and advanced weapons systems.

Researchers Mark Cancian and Chris Park said only a small amount of the estimated $3.7bn cost of the war in the first 100 hours – or $891.4m each day – was already budgeted for, while most of the costs – $3.5bn – were not.

That meant the Pentagon would likely need to request more funding soon to cover the unbudgeted costs, they said, which was likely to prove a political challenge for the Trump administration and provide “a focal point for opposition to the war,” they said.

Domestic cost-of-living concerns, inflation, and now a knock-on effect of rising gas prices due to the conflict are likely to further diminish support among US citizens for the war. It is also dividing Trump’s “America First” base, which he had promised in his presidential campaigns to not enter “foreign wars”.