The Congressional Budget Office now puts the price tag for former President Donald Trump's proposed Golden Dome missile-defense system at $1.2 trillion — a steep increase from earlier projections. The nonpartisan agency's updated estimate, released Wednesday, adds fresh uncertainty to a project that has already divided lawmakers over its scope and affordability.
The CBO's updated cost projection
The CBO's new figure represents a significant jump from the cost estimates that were floated when Trump first pitched the idea of a nationwide shield capable of intercepting intercontinental ballistic missiles. The agency did not provide a detailed breakdown of why the cost rose, but such systems typically face cost overruns due to the complexity of integrating sensors, interceptors, and command networks across a vast geographic area.
The Golden Dome concept, which Trump often compared to Israel's Iron Dome but on a far larger scale, would require dozens of new interceptor sites and space-based sensors. The CBO's analysis suggests the price could climb even higher if development timelines slip or if Congress mandates additional capabilities.
What's at stake for the Pentagon budget
A $1.2 trillion price tag would make the Golden Dome one of the most expensive single weapons programs in U.S. history. Even spread over a decade, the annual cost would strain the Defense Department's procurement budget, likely forcing cuts to other programs or requiring a separate funding stream. The CBO estimate does not include operational costs once the system is built, which could add tens of billions more over its lifetime.
Critics have long questioned whether the technology to reliably shoot down incoming ICBMs exists at the scale envisioned. The Pentagon's current ground-based midcourse defense system, which protects against a limited number of North Korean missiles, has a spotty test record and costs billions annually to maintain.
Political reactions and next steps
Republican supporters of the shield argue that the threat from peer adversaries like China and Russia justifies the expense. But the CBO's higher number could make it harder to win over fiscal conservatives, especially as the national debt surpasses $35 trillion. Democratic lawmakers have already signaled they will use the estimate to oppose new spending on the program.
The White House has not yet formally endorsed the Golden Dome, and the Pentagon is still conducting a feasibility study that is due later this year. The CBO estimate is nonbinding, but it will factor heavily into the budget battles that begin in February when the president submits his fiscal 2025 defense request.
