Overview
The debate over whether the Pentagon should expand fixed-price contracting to more major weapons programs has moved from technical acquisition-policy discussion to executive mandate. A White House Executive Order signed April 30, 2026 now directs all federal agencies, including DoD, to make fixed-price contracts the default procurement method, sharpening a long-running argument over where fixed-price disciplines cost growth and where it merely relocates risk in ways that raise long-run costs.
Brief
The argument over contract type is not new to defense acquisition, but it has been reopened by executive action. On April 30, 2026, the White House issued an Executive Order, "Promoting Efficiency, Accountability, and Performance in Federal Contracting," declaring it administration policy that fixed-price contracts with performance-based considerations should serve as the default and preferred method of procurement in order to advance cost predictability and budget discipline, appropriate contractor incentives and accountability, and streamlined procurement and contract administration. Agencies must now justify in writing any use of cost-reimbursement vehicles above certain thresholds, and each agency head must review its ten largest non-fixed-price contracts within roughly 90 days and attempt to renegotiate them toward fixed-price terms — though the order carves out exemptions for R&D and pre-production development work on major systems under FAR Parts 34-35, and for contingency and emergency-related contracts.
This is not the first such push. One legal analysis of the order's history notes that DoD took until 2019 to implement a formal fixed-price preference with agency-head approval gates for cost-type contracts exceeding $25 million, before Congress repealed the requirement in the 2022 NDAA. The same analysis calls the 2026 order the most expansive version yet, observing it applies government-wide, backs the fixed-price default with tiered approval thresholds, and requires mandatory renegotiation of the top ten existing contracts and semi-annual reporting — even as the underlying tension between cost certainty and risk allocation remains unresolved.
The empirical record cuts both ways, which is precisely what keeps this argument alive. On the pro-discipline side, the statutory apparatus built after decades of program cost growth — the Nunn-McCurdy Act and its 2009 reinforcement — exists because cost-reimbursement development programs routinely breached cost thresholds without triggering automatic consequences. On the caution side, the last fifteen years of fixed-price weapons development have produced some of the most visible contractor losses in modern defense-industrial history: Boeing's KC-46 tanker alone has produced $7 billion in cost overruns, far more than the contract's original value of $4.9 billion, and Northrop's B-21 bomber low-rate production lots have produced total losses of more than $2 billion even though the aircraft's engineering and manufacturing development phase was cost-plus.
What the record shows is not that fixed-price is good or bad in the abstract, but that it performs very differently depending on where in a program's life cycle it is applied — and the 2026 EO's own R&D carve-out for major systems acquisition is itself evidence that policymakers have absorbed that lesson, at least partially. The fight now is over how far the "default" reaches into pre-production, high-technical-risk territory, and how agencies will actually apply the exemption in practice.
The Strongest Point on Each Side
Strongest For
Cost-reimbursement development programs have produced statutorily documented, chronic cost growth serious enough that Congress built an entire termination-and-certification regime around it, while fixed-price structures place that overrun risk on the party best positioned to control it — the contractor executing the work.
Strongest Against
The Navy's A-12 Avenger program shows that fixing a price on technology that does not yet exist does not discipline cost, it makes the contract unpriceable, and the KC-46 and B-21 cases show that even programs assessed as low-risk at signing can still produce billions in losses that later resurface as higher negotiated prices, reduced contractor participation, or program disruption.
What It Turns On (4)
Where in a program's technology-maturity lifecycle does fixed-price stop disciplining cost and start becoming an unpriceable bet?
Both sides agree fixed-price works on mature, well-understood production; the entire argument is about how early in development a program's requirements and technology must be fixed before a contractor can responsibly accept fixed-price terms, and reasonable analysts disagree sharply on how to make that determination before the fact rather than in hindsight.
Does a contractor's fixed-price loss represent taxpayer savings realized, or a cost merely deferred into future negotiations, reduced competition, or program disruption?
This is an empirical question about long-run total program cost, not just headline contract price, and the answer likely differs program by program — resolving it requires tracking total government outlay across a program's full lifecycle, not just the initial contract's stated ceiling.
Can DoD reliably distinguish, at the point of contract award, between programs where requirements and technology are genuinely mature versus programs that only look mature on paper?
The KC-46 was assessed as low-risk at signing because it was based on an existing commercial airframe, yet still produced $7 billion in overruns; if pre-award risk assessment is unreliable, expanding fixed-price defaults transfers risk based on a prediction the acquisition system has a documented history of getting wrong.
Does shrinking contractor willingness to bid on fixed-price development work threaten competition badly enough to outweigh the cost discipline fixed-price provides on the contracts that do get bid?
If a policy of expanding fixed-price defaults causes only the largest, most risk-tolerant primes to bid — or causes qualified primes to exit certain program categories entirely — the resulting loss of competitive pricing tension could offset or exceed the savings fixed-price was meant to produce.
The claims behind this analysis, each with its verification status — including what is contested, unverified, or could not be established.
What each grade meansFixed-price contracts force realistic cost estimation and discipline at the bidding stage.
A think-tank analyst told Defense News that fixed-price contracting remains popular within DoD because it lets contracting officers demonstrate they are holding the line on cost growth.
○ REPORTEDcase for
Cost-plus development programs have produced chronic, statutorily-documented cost growth that fixed-price structures are designed to prevent.
A breach of the critical cost growth threshold occurs when unit cost increases by at least 25 percent over the current baseline or 50 percent over the original baseline, and the 2009 Weapon Systems Acquisition Reform Act made termination the statutory default absent a written certification to Congress.
✓ DOCUMENTEDcase for
Fixed-price contracting works well and is largely uncontroversial once a program reaches mature, low-risk production.
Air Force acquisition officials have said fixed-price contracting has been a mainstay of defense acquisition from the start and is how commercial industry operates constantly, while stressing they are not abandoning it as a tool.
○ REPORTEDcase for
The government's own accumulated preference for fixed-price defaults, now backed by executive mandate, reflects a considered administrative judgment that cost-reimbursement has produced worse outcomes over time.
The April 30, 2026 Executive Order makes fixed-price contracting the default and preferred method "to the maximum extent consistent with law," and requires senior-level written justification for any cost-reimbursement award above specified thresholds.
✓ DOCUMENTEDcase for
Uncapped upside for underrunning costs rewards genuine efficiency rather than merely padding cost estimates.
While other contract forms limit profit margins to roughly 5–12 percent, a fixed-price contractor that comes in under cost keeps the full benefit.
○ REPORTEDcase for
Fixed-price contracts imposed on immature technology have produced some of the worst program failures in modern defense-acquisition history.
The Navy's A-12 Avenger II fixed a price of $4.84 billion on stealth coatings, composites, and a radar that did not yet exist; the program never produced a flyable aircraft and was terminated in January 1991 after Lockheed and Northrop had refused to bid, with Northrop telling the Navy its cost estimate was at least $2 billion short.
✓ DOCUMENTEDcase against
Recent fixed-price development losses have been large enough to visibly damage prime contractors' defense businesses and their appetite to bid.
Boeing has absorbed more than $7 billion in cost overruns on the KC-46 tanker against an original contract value of $4.9 billion, and the company's Defense, Space & Security unit posted a -22.6% operating margin in 2024.
✓ DOCUMENTEDcase against
Fixed-price risk on high-technical-risk programs is measurably shrinking the pool of contractors willing to bid, which threatens competition and long-run cost discipline.
Northrop Grumman's CEO said the company has passed on some high-profile programs following its B-21 losses, and L3Harris's CEO has said his company has joined Boeing in declining to bid on fixed-price development contracts.
○ REPORTEDcase against
Even Pentagon acquisition officials who support fixed-price as a tool acknowledge it creates risk to both parties when applied early in development.
A senior Air Force acquisition official said going to fixed price early in development comes with risk to both the contractor and the Air Force, citing the KC-46 as the illustrative case, while also warning that structures which incentivize bidders to later regret their bids are something the service does not want to repeat.
○ REPORTEDcase against
Fixed-price losses can ultimately cost the government more than cost-plus would have, once follow-on price increases and program disruption are counted.
After absorbing over a billion dollars in losses on the first B-21 production lots, Northrop negotiated a higher not-to-exceed cost ceiling for the next 19 aircraft, with the average value above the unit price of the initial lots.
✓ DOCUMENTEDcase against
The government's own current policy implicitly concedes the risk by exempting the riskiest category of work.
The 2026 Executive Order exempts contracts involving research and development or pre-production development for major systems acquisition under FAR Parts 34-35 from its agency-head approval requirement.
✓ DOCUMENTEDcase against