Golden Dome costs surge amid questions over feasibility, credibility

The Trump administration’s ambitious Golden Dome missile defence system is rapidly escalating in cost, raising questions about both its budget credibility and operational effectiveness, Federal News Network writes.

The Pentagon now estimates the program at $185 billion, $10 billion more than President Donald Trump’s initial projection last year, with funding intended to support advanced capabilities like airborne moving target indication (AMTI), space data networking, and hypersonic missile tracking.

General Michael Guetlein, Golden Dome’s program manager, explained at the McAleese Defence Programs conference, “We were asked to prepare some additional space capabilities…to move the current schedules from the right to the left, and they gave us $10 billion extra to accelerate those capabilities with the United States Space Force.” The administration continues to tout the program as a national priority, promising near-complete effectiveness and rapid deployment within a few years.

Yet independent analyses paint a far more complex and costly picture. The Congressional Budget Office estimated that even a limited space-based interceptor component of Golden Dome could range between $161 billion and $542 billion. A separate assessment by the conservative American Enterprise Institute projected that a robust 20-year architecture—including operations, maintenance, and replenishment—could total $3.6 trillion. AEI further warned that a system built around the administration’s $175 billion figure would intercept only a handful of incoming missiles, far short of the program’s stated objective.

Guetlein defended the Pentagon’s projections, claiming outside estimates misrepresent the system’s architecture and objectives. “I would say the difference between what they are estimating and what we are building is they’re not estimating what I’m building. They’re estimating a very large, complex capability, fully integrated, using technologies that we currently use to fight the away game,” he said. He maintains confidence that the cost will not exceed $185 billion.

Critics remain unconvinced. Gabe Murphy, policy analyst at Taxpayers for Common Sense, described the updated Pentagon figure as “no more believable than the president’s initial estimate.” He emphasised that defending the entire United States would require far broader coverage and advanced capabilities than those currently deployed abroad. 

Murphy warned, “Either the Pentagon is not being honest about the likely costs of this system, which wouldn’t be a first, or it’s now planning to build a system so limited in its architecture that it will not have even a theoretical hope of achieving its stated goal.” He added that even the $3.6 trillion scenario “would still fail to achieve its central goal of reliably defending the United States from peer and near-peer nuclear weapons.”

The Pentagon has already secured a $23 billion initial allocation through reconciliation legislation, though lawmakers remain largely in the dark on how these funds will be spent. Congressional appropriators requested detailed budgetary justification in the fiscal 2026 appropriations act, highlighting concerns over the rush to fund a program with an unclear execution plan.

Golden Dome is envisioned as a multilayered defence network, combining sensors, satellites, and interceptors to protect the United States from a spectrum of missile threats.

By Jeyhun Aghazada