The Scorekeeper Was the Last to Know
The Congressional Budget Office put a price on a national missile defense system on May 12. A system matching the January 2025 Iron Dome for America executive order, CBO found, would cost about $1.2 trillion to develop, deploy and operate for twenty years, a figure laid out in its report and repeated in testimony to the Senate on September 29.
Anyone who has met the federal government can guess what happened next. Nothing. David Mosher, who directs CBO’s National Security Division, told the Senate Armed Services strategic forces subcommittee at the hearing that the Golden Dome program office gave the agency its first briefing on September 25, four months after the estimate appeared, according to the Center Square.
CBO told the same outlet it had received no information from the program office before publishing. Guetlein told the same hearing that the program remains on track to deliver an initial operational capability by the summer of 2028 — a statement confirmed in the hearing record — a timeline he has stated publicly since December 2025, according to Federal News Network and National Defense Magazine, and confirmed at the April 2026 subcommittee hearing.
In the interval, Gen. Michael Guetlein, who runs the program, wrote a Washington Post opinion piece dated September 24 calling estimates approaching $1.2 trillion sensational and accusing their authors of imagining a hypothetical system built on legacy technology and outdated cost models. His office, he added, had briefed congressional committees dozens of times. CBO, as it happens, is not a congressional committee.
There is a name for faulting a forecast’s assumptions while the real ones stay classified, and it is not peer review.
Senator Deb Fischer‘s office, for its part, said she is glad the two sides can now work toward a more accurate estimate. One hopes to hear such sentiments in month one rather than month five.
Two Numbers, Two Universes
The Pentagon’s number is $185 billion, which a program office official described as covering the objective architecture through 2035. CBO’s is $1.2 trillion over twenty years. The same official told the Center Square the office would need more time to say what the $185 billion does and does not include, a remarkable thing to say about a figure one has been defending in public.
CBO’s testimony offers two readings of the gap. Either the real architecture is far narrower than the executive order describes, or the money is parked in other accounts, such as the services’ missile procurement lines. Or both.
The engine of the gap is the space layer. CBO prices the space-based interceptors at $743 billion, about 60 percent of the total, for 7,800 satellites sized to engage a raid of ten intercontinental ballistic missiles launched nearly at once. Atmospheric drag at those altitudes limits each satellite to roughly five years, so CBO says about 30,000 would be needed over twenty years to keep 7,800 aloft.
Strip the layer out and the bill falls to $448 billion, though CBO notes the result would no longer match an executive order that asks for space-based interceptors by name.
Here is an inference, and it should be labeled as one. It rests on CBO’s cost table and on the Pentagon’s own inability, so far, to define the scope of its figure.
A $185 billion program through 2035 cannot contain a $743 billion constellation, so either the Pentagon’s space layer is far smaller than CBO’s or the cost is booked somewhere other than the Golden Dome fund. The reasoning is arithmetic, with one caveat: CBO spreads replacement purchases across twenty years, so the two numbers are not strictly comparable, and CBO itself says a direct comparison is difficult without more detail from the Department of Defense.
Cleveland, Sioux Falls, and the Word Everyone
The Pentagon’s position, relayed by an official who would not be named, is that the system protects all Americans, including those in Guam, Alaska and Hawaii. The official would not say which areas it defends, or whether it relies on U.S. Northern Command‘s defended asset list, citing operational security. Nor did the official address testimony at the hearing that not every American can be protected.
That testimony came from David Trachtenberg, a former deputy under secretary of defense for policy, who told Senator Angus King he was not saying every citizen can be protected and expected the system to be deployed in phases. King had already observed that the name Golden Dome implies national coverage, and he asked the obvious follow-up.
He put it to the panel this way, “Is it going to protect Cleveland but not Sioux Falls?” Choices were coming, King said, and they had to be made public.
CBO’s notional design offers a hint of the geometry. Its 35 regional sectors each cover roughly 1/37 of the country, which CBO says would protect most of the U.S. population, and the agency says plainly that the system “would not be an impenetrable shield” and could be overwhelmed by a full-scale attack from Russia or China.
CBO told the Center Square it did not estimate what share of the population or land area would be covered. Most is doing a great deal of work in that sentence, and the remainder presumably lives somewhere.
The case for secrecy is not frivolous. Fischer’s office says the specifics are classified, and Tom Karako of the Center for Strategic and International Studies has argued that defended asset lists and similar operational details should remain closely held. But it is one thing to keep a radar’s performance secret and another to keep secret which American towns sit under the umbrella.
The first protects the system. The second protects the program from the question.
A Dome With No Budget Under It
All of this assumes the thing gets paid for. Congress gave Golden Dome about $25 billion in the 2025 reconciliation law, and Guetlein said in August that roughly 90 percent had been obligated, according to Air and Space Forces Magazine.
For fiscal 2027 the Pentagon asked for about $17 billion inside a proposed $350 billion reconciliation package and a mere $400 million in the ordinary base budget. The same report finds little political will for another reconciliation bill.
The new fiscal year opened October 1 under a continuing resolution, and because Golden Dome has no fiscal 2026 appropriation, a stopgap has no baseline to hold it level against. Guetlein warned in August that without funding in fiscal 2027, “there is no Golden Dome because there is no funding.”
Senators of both parties noticed. Mike Rounds said reconciliation should not have been necessary to get the program started. King called it very bothersome that the Pentagon and the White House went around the normal appropriations process for one of the most expensive initiatives of the government.
Fischer pointed out that the layered architecture traces to her own committee’s language in the fiscal 2024 defense authorization, which means the program’s parentage is not in dispute even if its price is. Karako told the panel that Golden Dome and the broader munitions effort will stand or fall on 2027 funding.
So the ledger reads as follows: A shield for everyone, with a list of protected places nobody will read aloud, priced at either $185 billion or $1.2 trillion depending on whom one asks and what one counts, funded by a reconciliation bill that has not passed and a continuing resolution that cannot carry it.
CBO is careful to note that engaging a missile is not the same as defeating it. Someone at the Pentagon might extend the same care to distinguishing a program from a slogan.
