Golden Dome Could Cost $1.2 Trillion as China Expands Missile Production

Golden Dome faces a basic imbalance before its final design is even settled: the proposed U.S. missile-defense architecture could cost roughly $1.2 trillion over 20 years, while China is expanding the industrial base behind a ballistic-missile arsenal assessed at more than 3,100 weapons.

The Congressional Budget Office estimate is not a price tag for a completed design. Golden Dome remains an unfinished initiative, envisioned as a network of terrestrial and space-based sensors, tracking systems, early-warning assets and interceptors covering the U.S. mainland, Alaska and Hawaii. Canada has also discussed possible participation. The estimate is far above the $175 billion initially allocated to the project, and space-based weapons and warning systems could account for as much as 70% of acquisition costs.

That distinction matters. Golden Dome is not yet an operational shield, and the $1.2 trillion figure depends on assumptions about an architecture that has not been finalized. Program director Gen. Michael Guetlein has disputed trillion-dollar projections, saying the system being built carries a $185 billion price tag and is intended to deliver an operational capability by summer 2028. The competing figures therefore describe different concepts, scopes and time horizons rather than a settled bill.

The underlying cost driver is scale in orbit. Space sensors can broaden warning and tracking coverage, but a defensive constellation must provide persistent availability rather than merely place hardware overhead occasionally. Space-based interceptors are especially demanding because satellites continuously move relative to Earth. Providing useful coverage can require large constellations, launches, ground infrastructure and replacement spacecraft over the system’s lifetime.

This is why architecture choices can move the estimate by hundreds of billions of dollars. A broad defense intended to cover many threat types and regions needs more sensors, communications links and interceptors than a limited architecture protecting selected areas or addressing smaller attacks. The technical question is not simply whether an individual sensor can track a missile or an interceptor can hit one. It is whether enough connected hardware can be fielded, maintained and replenished at a sustainable cost.

China’s production expansion sharpens that problem. Corporate filings reviewed by Bloomberg identified 81 Chinese companies publicly reporting production of missile parts. More of those suppliers posted record revenue in 2025 than in any previous year since 2013. Exact missile inventories are not public, but the United States assesses that China possesses more than 3,100 ballistic missiles. China also fields operational hypersonic missiles, while the United States does not, according to the assessment. Hypersonic weapons travel faster than five times the speed of sound.

Those figures should not be read as a one-for-one sizing requirement for Golden Dome. China’s assessed ballistic-missile total covers an arsenal with different roles and ranges, while the proposed U.S. architecture has not disclosed the attacks it would be sized to defeat. But the production trend carries a direct engineering consequence: defensive effectiveness depends on available sensors and interceptor inventory, not just the performance of a single engagement.

Inventory depth is already a constraint. U.S. manufacturers are under pressure to replenish American and European stocks after air-defense missiles and other equipment were transferred to Ukraine and expended during more than 10 weeks of conflict in the Middle East. A CSIS assessment of interceptor inventories notes that specialized missile-defense interceptors combine high unit costs with lengthy production and delivery timelines. Expanding output requires sustained funding and predictable demand, not simply an emergency order after inventories fall.

Golden Dome also presents an integration problem. Its value would depend on linking existing and new warning sensors, tracking data, command-and-control software and multiple interceptor types without unnecessary duplication. Program officials have described affordability and scalability as top objectives, with command and control intended to unify systems that were originally built for different missions and users.

That could reduce the need to develop every component from scratch, but it does not remove the production burden. Existing systems still require launchers, interceptors, crews, maintenance, communications and replacement hardware. New space layers add spacecraft production, launch cadence and orbital replenishment. Each added defensive layer may improve coverage against a class of threat while increasing acquisition and operating costs.

The central unresolved issue is therefore the mission boundary. A limited defense of selected sites or against smaller attacks is materially different from a nationwide shield sized for a large, complex missile force. Until Golden Dome’s architecture and defended scope are finalized, $185 billion and $1.2 trillion should be treated as estimates tied to different assumptions not proof of either affordability or failure.

China’s 81 publicly identified missile suppliers make the schedule consequential. Golden Dome’s eventual credibility will depend not only on whether its sensors and interceptors work, but whether the United States can manufacture and sustain enough of them while the missile force they are intended to counter continues to grow.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.