The F-35 is the most expensive weapon system the Pentagon owns, and the fleet is increasingly hard to keep flying. This week, the government and its contractor proposed to fix both problems with a single decade-long promise. The promise comes with a catch: the people who would have to fund it have not agreed to it.

On 22 October 2026, the US Department of War, the name now used in official Pentagon releases, and Lockheed Martin announced a 10-year framework agreement covering F-35 production and sustainment. Lockheed’s release was datelined Arlington, Virginia. It is a statement of intent, not a contract, and no jets have been ordered.

What the framework actually covers

The arrangement spans at least 850 aircraft for the United States across production Lots 21 through 30. It also bundles initial spares, ten years of modification kits and sustainment, and orders from international customers. Production would hold steady at 156 jets a year.

That annual rate points to a larger total than the US share alone. Air & Space Forces calculated that 156 aircraft a year over a decade comes to roughly 1,560 jets, which would leave about 700 for foreign buyers. That figure is the outlet’s own arithmetic, not a number from the release.

In return for the long-term commitment, Lockheed will put up at least $7 billion of its own money for program initiatives, according to the Pentagon statement as reported by Defense News, Stars and Stripes and Air & Space Forces. On the 22 October earnings call, CEO Jim Taiclet said supplier contracts would use a fixed-price structure with an escalator. Neither side has disclosed a total value or a price per aircraft.

Why the money still has to be found

Language matters here. Some headlines have said the deal was “finalized” or “locked,” but the primary documents describe a framework that depends on Congress. The Pentagon statement says execution remains subject to congressional authorization and appropriations. Lockheed has said it will negotiate terms, pricing and schedules with the F-35 Joint Program Office only if lawmakers grant authority and funding in the coming months.

The funding picture is not simple. A stopgap spending law runs through 11 December and generally bars new multiyear purchases, and no full-year FY2027 appropriation exists. Both the House and Senate versions of the FY2027 defense policy bill would permit multiyear F-35 contracts, but the two versions must be reconciled before the framework can become a formal award.

The yearly numbers do line up with what the Pentagon has already asked for. Congress funded 47 F-35s in FY2026, while the FY2027 request sought 85, which matches the framework’s average of 85 US jets a year.

The readiness problem behind the deal

Lockheed positions the agreement as a way to turn long-term demand into a healthier fleet, and the fleet’s condition is the strongest argument for it. A Government Accountability Office report released on 11 June found the F-35’s mission-capable rate fell from 67 percent in FY2021 to 44 percent in FY2025. The share of jets that were fully mission capable dropped from 38 percent to 25 percent over the same period.

The same report found the Joint Program Office paid Lockheed more than $114 million of roughly $269 million in available incentive fees between 2020 and 2023, even though readiness measures stagnated or worsened. GAO also reported that the program office says it needs $13.7 billion more than planned through FY2031 to sustain the fleet. In late June, program chief Lt. Gen. Gregory Masiello told senators the fleet had outgrown the system built to support it.

That history gives weight to a line in the Pentagon’s announcement. Michael Duffey, the Under Secretary of Defense for Acquisition and Sustainment, said the deal has “fundamentally changed how we stabilize the American defense industrial base.” He also spoke of aligning financial incentives with actual performance, but neither side has explained what those incentives would look like. Given the GAO’s findings on past fee payments, that is the detail to watch.

A pattern of framework deals

This is not the Pentagon’s first agreement of this kind in 2026. Lockheed reached a PAC-3 MSE production framework in January and a THAAD framework weeks later, and the THAAD agreement became a contract worth more than $35 billion in June. On 19 October, the Pentagon announced a framework with BAE Systems for APKWS guidance kits.

The THAAD precedent shows that a framework can turn into money. It does not show that the F-35 version will, because this one is far larger and runs into a more contested budget fight. Earlier F-35 buying was done in smaller chunks, with the Lot 18 and 19 deal worth about $24.3 billion for 296 jets, according to Breaking Defense in September 2025.

What each side stands to gain

The Air Force has made its own case for volume. A force-structure report sent to Congress on 16 October says the service needs 1,509 combat-coded fighters by 2035, with F-35As making up about 40 percent of that. How the 850 jets would divide among variants and services has not been made public.

Lockheed also points to the wider economy, estimating the deal would support 317,000 US jobs and about $79 billion in annual economic activity over the decade. Those are the company’s own projections and should be read that way. The company says more than 1,375 F-35s are in service, with over a million flight hours logged across 42 bases and 13 nations operating them on home soil. The framework would fold international orders into the same production plan, so allied buyers have a stake in how Congress responds.

What to watch next

The next few months will decide whether this announcement means anything. Lawmakers have to pass a defense policy bill that allows multiyear buys and then fund it, and only after that would the Joint Program Office and Lockheed sit down to settle prices and schedules. Those prices are still unknown, and so far the deal rests on a promise rather than a number.

For allies planning around F-35 deliveries, and for crews trying to keep an aging, hard-to-maintain fleet in the air, the question is no longer whether the Pentagon wants a decade of certainty. It is whether Congress is willing to pay for it.