US taxpayers are now shouldering roughly $800 million to $1 billion a day after the United States and Israel opened strikes on Iran, analysts say. Early tallies from the Center for Strategic and International Studies and Pentagon briefings show billions spent on munitions and weapons replacement, while the Congressional Budget Office warns rising deficits and higher interest costs could magnify the fiscal impact if operations continue.

How the bill adds up

  • Center for Strategic and International Studies: about $3.7bn used in the first 100 hours, largely on munitions and replacements; CSIS estimated roughly 95% of that was not covered by existing budgets.
  • Pentagon figures reviewed by lawmakers: munitions costs of about $5.6bn in the first 48 hours (a narrow tally that excludes operating costs).
  • Congressional briefings/reporting: the munitions tab for the first six days reached at least $11.3bn.
  • Analyst estimates of the daily running rate vary: the Penn Wharton Budget Model’s Kent Smetters put costs nearer $800m/day after the initial surge; other advisers estimate closer to $1bn/day.

These figures focus on expendables — bombs, missiles, ammunition — and the immediate replacements they require. They do not fully capture additional operating costs for deployed forces or potential repairs after retaliatory attacks; the Pentagon has declined to provide a broader public tally.

Short-term spending and budgetary mechanics

  • Most extra spending so far has not come from the Pentagon’s annual appropriation; commanders have relied on stockpiles and emergency supplies while the White House and Congress consider supplemental funding.
  • Reports indicate the White House could seek roughly $50bn in supplemental funds on top of the Pentagon’s ~$1.4tn baseline budget — a request that would need congressional approval and likely prompt partisan debate over offsets.
  • Unbudgeted war spending is typically financed by borrowing; higher borrowing raises interest costs, which the CBO’s 10-year projections already show will pressure deficits and debt levels through 2035.

What else the money could do

  • Penn Wharton estimated two months of sustained operations at current rates would add about $65bn in new net costs; other assessments put the broader economic footprint (lost growth, trade disruption, insurance costs) from tens to a few hundred billion dollars.
  • Advocates and some lawmakers have compared the war tab with domestic spending lines — noting that billions spent on ordnance could alternatively fund health insurance subsidies, Medicaid, homelessness programmes or education projects — highlighting trade-offs lawmakers will face.

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President Donald Trump said on March 9 in Florida the war was "very complete" and should end "very soon."

This article was created with AI assistance.