May 12 (UPI) — A nonpartisan office said Tuesday that President Donald Trump‘s proposed Golden Dome missile defense system could cost $1.2 trillion over two decades – far more than the $175 billion he said it would cost last year.
The Congressional Budget Office said in a report that this analysis isn’t based on final blueprints, as full details of the system’s architecture haven’t been announced, Time reported. It said this estimate shows the price of “one illustrative approach rather than an estimate of a full Administration proposal.”
The CBO said that acquisition costs for the system would alone cost more than $1 trillion, and of that, about 70 percent of the cost would be for the interceptor layer, orbital weapons meant to destroy missiles after they’re launched, The Hill reported. This would include about 7,800 satellites.
Gen. Mike Guetlein, the Pentagon official in charge of the project, said in March that it would cost about $185 billion. The CBO report said that this difference in estimated price may mean that the “objective architecture is more limited” for the project than the system accounted for by the CBO, The Hill reported.
Congressional Republicans have earmarked $25 billion for the project in the 2025 One Big Beautiful Bill Act. The Pentagon has asked for $17 billion more in a reconciliation bill this year.
The Trump administration’s fiscal 2027 budget request, which includes $750 billion earmarked for the Golden Dome system, says the system “keeps Americans safe, while using innovative program management and acquisition approaches to prudently employ taxpayer dollars,” The Hill reported. Trump has said he wants the system operational by the end of his term.
The CBO said the system it used in its estimate could counter a limited attack but would be overwhelmed by a large-scale one, Time reported. Israel’s similar air-defense system, often called the Iron Dome, has intercepted missiles from Iran and other localized groups but is meant for a smaller area and shorter-range threats, as opposed to the United States’ need to defend a much larger area from long-range attacks, it said.
Sen. Jeff Merkley, D-Ore., requested the CBO report. He said Tuesday that the report shows the Golden Dome project “is nothing more than a massive giveaway to defense contractors paid for entirely by working Americans” that will “do little to advance American national security.”