The Pentagon’s most important weapons programs are now running an average of 12 years behind schedule, and the situation is getting worse, not better.
That is the finding of the Government Accountability Office’s annual report on Major Defense Acquisition Programs, the 104 most expensive systems the Pentagon is buying, representing a planned investment of $2.4 trillion.
“Schedule delays persisted across MDAPs, signaling overly optimistic time frames,” the GAO writes. And because many programs have not updated their delivery dates at all, letting the clock run while claiming to be on schedule, “the 12-year average will likely increase in the future.“
This is not a one-year blip. The average has crept upward from the previous year’s report. Programs are not slipping off a fixed timeline; they are slipping off timelines that were already fiction.
The “rapid” pathway that isn’t
The Pentagon has a special acquisition lane called Middle Tier of Acquisition, designed to field new capabilities within two to five years. It is supposed to be fast, lean, and focused on proven technology ready for prototyping.
Instead, it has become a backdoor for programs that should never have been in it.
The GAO found that between 2018 and 2025, 18 out of 40 programs entered the MTA pathway with immature technologies, some below the “prototype stage” readiness level, a few below “proof of concept.” Of the 8 current MTA projects the GAO examined, 7 were technologically immature.
Among them: the Hypersonic Attack Cruise Missile and the Next Generation Persistent Overhead Infrared sensor, two projects the Pentagon has been touting as near-term breakthroughs.
“Programs are increasingly using the MTA pathway to mature technologies, when the intention of the pathway is to prototype and or field a residual capability within two to five years,” said Shelby Oakley, GAO Director for Contracting and National Security Acquisitions. “This is why we are not seeing capabilities fielded any faster.“
Costs are up, too
Of 72 programs with cost data, 46 reported increases totaling $122 billion. Sixteen reported decreases adding up to $47 billion, meaning the net overrun is $75 billion and counting. Last year the GAO blamed inflation. This year the focus is on structural problems: unrealistic schedules, immature technology, and a Pentagon culture that refuses to admit when a program is in trouble.
Specific disasters
The Navy’s MQ-25 Stingray, an unmanned refueling aircraft meant to operate from carriers, is now 2.5 years late to initial capability and 26 months late to the end of operational testing. Further design changes could push it even further.
The DDG(X) destroyer, billed as the Navy’s next-generation surface combatant, has no acquisition strategy at all. The GAO says “the Navy’s business case for the DDG(X) program is not apparent.” Shipyards are already running up to 55 months behind on the current Arleigh Burke-class destroyers. The next generation will inherit those delays.
The Air Force is trying to modernize the B-52’s radar, and planning to enter production with “very little development flight testing completed.” That is the kind of decision-making that creates the 12-year average in the first place.
The Army’s Mid-Range Capability program, which mounts Navy missiles on Army vehicles, has three newly-identified critical technologies, all immature. The GAO questioned “whether the return on investment is worthwhile” for the four batteries the Army plans to produce.
What it means
These are not small programs or niche technologies. These are the systems the United States is betting on for the next generation of warfare: hypersonic weapons, carrier-based drones, next-generation destroyers, strategic bomber upgrades. If they are 12 years behind schedule now, they will be 15 years behind by the time anyone admits it.
The GAO’s message is blunt but familiar: the Pentagon keeps promising timelines it cannot keep, starting programs before the technology works, and refusing to reset expectations when they slip. Until Congress or the Secretary of Defense forces a real reckoning, the 12-year average will just keep climbing.