Aerospace giant Boeing reported a staggering $565 million loss on its KC-46 tanker program in the last quarter of 2025. This significant financial hit pushed the margins for its defense business into the red, unsettling investors after what had been an apparent period of recovery.
A Recurring Financial Strain Amidst Overall Improvement
After years of formidable losses on fixed-price development programs, Boeing’s defense business had shown signs of improvement through most of 2025, recording only one minor charge before the recent, substantial KC-46 setback. This latest blow reignites concerns over the company’s long-standing struggle with cost management.
Executive Explanation: Production and Supply Chain Challenges
During an earnings call, Boeing CEO Kelly Ortberg was quick to emphasize that the latest charge on the beleaguered tanker does not reflect broader systemic issues across its defense business. Instead, executives attributed the loss primarily to higher production support and supply chain costs.
“The predominance of the charge is increased cost on the actual 767 commercial airplane production,” Ortberg explained, referencing the Boeing 767 jetliner that forms the foundational design for the KC-46. “We delivered 14 tankers in 2025 and we are planning to deliver 19 in 2026, and we made the conscious decision that we needed to keep resources at a higher level to assure that we make those deliveries on time.”
Boeing CFO Jay Malave added that these production support costs involved “keeping higher levels of quality and engineering support” at the company’s Everett, Wash., facility, which has actively contributed to improving production quality.
“For example, as compared to the first half of the year, we saw average factory rework levels decrease by 20 percent in the fourth quarter,” he stated. “So while these investments are starting to evidence progress, we need to sustain them for longer than previously planned to promote stability.”
A Decade of Overruns: The Fixed-Price Contract Burden
For the better part of a decade, the KC-46 program has been plagued with technical and schedule issues, driving up costs significantly beyond its original $4.9 billion fixed-price contract. Under the terms of its agreement with the Air Force, Boeing is contractually obligated to cover any costs exceeding that ceiling, which has already led the company to spend over $7 billion out-of-pocket on the tanker’s development.
A Second Chance? Crucial Negotiations for Future Orders
Despite the program’s chronic struggles, the Air Force in 2025 announced its intention to proceed with a second procurement of up to 75 additional KC-46s. Negotiations on pricing for this next batch are set to commence this fall, Ortberg revealed, assuring that Boeing is thoroughly assessing the full cost of building the tanker prior to these critical discussions.
“Obviously, you know this has been a bad contract for the last decade, this existing contract,” Ortberg conceded. “As we enter into a new opportunity where we get to reprice, we want to make sure that we … underwrite that contract, to ensure it’s a fair contract, and we can make money on that.”
Mixed Outlook: Expected Improvements Amidst Persistent Risks
Due to the substantial losses on the KC-46, Boeing’s defense business concluded the year with negative operating margins of -0.5 percent. While still negative, this marks a significant improvement from 2024, when operating margins plunged to -22.6 percent.
Boeing executives anticipate “sequential improvement” in its defense business from 2025 to 2026, with “gradual improvements” thereafter, Malave indicated.
“Obviously, this is predicated on successfully completing these programs without taking additional charges and leveraging the active management playbook to continue to de-risk these programs,” he cautioned. “The tanker charge this quarter highlights there remains risk on these programs, even if the envelope of risk has been significantly reduced over the last year.”
Analyst Reaction and Other Strategic Ventures
Seth Seifman, an analyst with JP Morgan, commented in a note to investors that the KC-46 charge was “a bit disappointing, but this program has taken far bigger charges and while costs are up, the key thing at this point is to maintain execution.”
Boeing is also actively engaged with the Air Force on a multiyear contract for the PAC-3 seeker, Ortberg mentioned. The Defense Department recently announced plans to significantly ramp up PAC-3 production over the next seven years, with prime contractor Lockheed Martin making substantial investments to facilitate this increase.
Given that Boeing has already made capital expenditures (CapEx) to boost production capacity for the PAC-3 seeker, Ortberg stated he did not “see a big step up in CapEx” required for the multiyear contract.
