A proposed national missile defense system, dubbed “Golden Dome” by the Trump administration, could come with a staggering price tag of approximately $1.2 trillion over the next 20 years. This estimate comes from the nonpartisan Congressional Budget Office (CBO), which released a report detailing the potential costs associated with developing, deploying, and operating such a system.
The “Golden Dome” system, as outlined in a presidential executive order, is intended to defend the entire United States, including Alaska and Hawaii, against a range of threats including ballistic, hypersonic, and cruise missiles, as well as other aerial dangers. The CBO’s analysis considers a multi-layered defense strategy, incorporating space-based interceptors, two wide-area surface layers, and a surface-based regional sector layer, supported by advanced sensors and communication systems.
A significant portion of the projected cost, roughly 70% of acquisition expenses and 60% of total costs, is attributed to the space-based interceptor layer. The report indicates that acquisition costs alone could exceed $1 trillion over the 20-year period, with average annual operation and support costs projected at over $8 billion.
The CBO’s estimate acknowledges substantial uncertainties regarding the timeline for deploying various components of the system. Their cost projections for operations and support begin in 2028 for surface-based systems and 2030 for space-based systems, noting that later deployments could lead to higher ongoing expenses.
This CBO estimate contrasts with figures presented by the director of the Office of Golden Dome for America, who previously estimated the objective architecture would cost $185 billion to deploy over a decade. The White House’s 2027 budget request also suggests an average annual funding of $15 billion for the next five years for the Golden Dome for America Fund. The CBO suggests this discrepancy might imply a more limited scope for the objective architecture or reliance on other funding sources.
Given the limited public information on the administration’s specific plans for the national missile defense architecture, the CBO notes that a direct cost comparison is challenging, and the final system may differ from their analytical model or the executive order’s objectives.
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