CBO Estimates $1.2 Trillion Cost for Trump’s “Golden Dome” Missile Shield

The Congressional Budget Office released a new analysis estimating that the “Golden Dome for America” missile-defense program will cost about $1.2 trillion to develop, deploy and operate over 20 years. The figure is far higher than the $175 billion President Donald Trump cited in May 2025 and the $185 billion later quoted by program manager Gen. Michael Guetlein.

Breaking Defense

Trump issued an executive order in his first week of the second term (January 2025) directing the creation of a multi-domain shield modeled after Israel’s “Iron Dome.” The order frames the system as a response to “next-generation strategic weapons” from peer and near-peer adversaries. Initial congressional funding came from the $24 billion allocated in the 2026 “One Big Beautiful Bill,” with an additional $10 billion approved for extra space capabilities.

TND - The National Desk

• Total projected cost: $1.2 trillion (CBO)

Breaking Defense

• Acquisition: just over $1 trillion (? 70 % for space-based interceptors, 60 % of total)

DefenseScoop

• Space-based interceptor (SBI) constellation: 7,800 low-Earth-orbit satellites, cost $720 billion to develop, deploy and maintain, plus $1 billion per year for operations

DefenseScoop

• Space-only estimate (2024): $542 billion over 20 years (CBO)

TND - The National Desk

• FY 27 request: > $17 billion in reconciliation funds, $400 million from the base budget

DefenseScoop

President Trump justified the program by noting that “the threat from next-generation strategic weapons has become more intense and complex” over the past four decades. Gen. Guetlein told lawmakers the Pentagon will not field space-based boost-phase interceptors if they are not affordable, emphasizing a focus on “affordability” and “redundant capabilities.” A Pentagon spokesperson declined further comment, referring to Guetlein’s April testimony.

Breaking Defense

Sen. Jeff Merkley (D-OR) called the initiative “nothing more than a massive giveaway to defense contractors paid for entirely by working Americans.” Critics also point to the CBO’s note that the Defense Department has provided “few details,” making long-term cost estimation “impossible.”

Associated Press

The CBO’s $1.2 trillion figure contrasts sharply with the DoD’s $185 billion estimate, which appears to cover a shorter timeframe and a narrower scope. The lack of a publicly disclosed architecture forces the CBO to rely on a “notional” design, leaving uncertainty about the actual system components and deployment schedule.

Breaking Defense

• “nothing more than a massive giveaway to defense contractors paid for entirely by working Americans.” — Sen. Jeff Merkley, D-OR

Associated Press

• “Over the past 40 years, rather than lessening, the threat from next-generation strategic weapons has become more intense and complex with the development by peer and near-peer adversaries of next-generation delivery systems,” — President Donald Trump

Associated Press

• “If boost-phase intercept from space is not affordable and scalable, we will not produce it because we have other options to get after it,” — Gen. Michael Guetlein

DefenseScoop

• “We are so focused on affordability. If we cannot do it affordab[ly], we will not go into production,” — Gen. Michael Guetlein

Breaking Defense

• “The most expensive component is the space-based interceptor layer, which accounts for about 70 percent of acquisition costs and 60 percent of total costs.” — Congressional Budget Office

DefenseScoop

The Pentagon plans to demonstrate an operational capability by summer 2028 and field the full architecture in the 2030s. FY 27 funding requests seek > $17 billion, while reliance on reconciliation bills remains uncertain. If space-based interceptors prove unaffordable, the program may be scaled back in favor of alternative, non-space solutions.

DefenseScoop