US aerospace and defence manufacturers are warning that shortages of compliant critical materials could disrupt production when tighter sourcing restrictions take effect on 1 January 2027. A report released by the Aerospace Industries Association (AIA) on 8 October finds that significant new domestic processing, refining and magnet manufacturing capacity for aerospace-grade materials is not expected to become available until 2028 or later. Qualification and certification can then require another 12–24 months before materials enter defence production.
The warning comes as the United States commits substantial funding to rare earth mining and manufacturing. On 3 June, the Commerce Department finalised agreements providing up to $1.6 billion in support for USA Rare Earth, comprising up to $277 million in federal incentives and a senior secured loan of up to $1.3 billion.
The combined maximum of $1.577 billion is rounded to $1.6 billion in the government announcement. Most of the package represents potential debt financing rather than direct grants. The investment supports a mine-to-magnet strategy spanning rare earth extraction, processing, metals, alloys and permanent magnet manufacturing.
However, USA Rare Earth’s planned $1.2 billion manufacturing complex in Blacksburg, South Carolina, is not scheduled to begin commissioning until 2028, according to the company’s 9 September project announcement. That leaves a period in which defence contractors must satisfy tighter sourcing requirements without being able to rely on much of the new domestic manufacturing capacity under construction.
Aerospace suppliers face a qualification problem
The AIA’s Strengthening Critical Minerals Supply Chains report, dated September 2026 and published on 8 October, examines the industry’s readiness to comply with restrictions under 10 U.S.C. § 4872.
On page 2, the association identifies limited aerospace-grade processing and manufacturing capacity as a major constraint. For several covered materials, compliant suppliers cannot provide the quantity, quality and performance specifications required by defence manufacturers. The shortage is particularly difficult to resolve where a potential supplier has not completed customer qualification.
On page 11, an AIA member company reports that it cannot begin qualification and testing until compliant neodymium-iron-boron magnets become commercially available in the required specifications, purity and volumes.
Qualification introduces a further delay after production begins.
Pages 12–13 of the report describe processes involving production consistency, material traceability, technical documentation, process controls and customer acceptance testing. Some manufacturers anticipate at least 12 months of qualification work, with 12–24 months required for certain existing processing sources to meet aerospace-grade specifications.
In some cases, companies reported source-transition costs exceeding $10 million. These costs relate to qualifying alternative critical material sources across the industry’s applications and should not be interpreted as a standard cost for changing magnet suppliers. The findings mean that new domestic capacity cannot automatically be counted as qualified defence supply when a plant is commissioned.
January 2027 changes the rules across the supply chain
The procurement deadline arises from restrictions governing specified magnets, tantalum and tungsten under DFARS clause 252.225-7052. Although the clause carries a May 2024 date, subsection (b)(1)(ii) establishes expanded requirements taking effect on 1 January 2027.
For neodymium-iron-boron (NdFeB) magnets, subsection (b)(3) extends the restrictions through the supply chain from mining the constituent materials to finished magnet production. Samarium-cobalt (SmCo) magnets are subject to corresponding provisions under subsection (b)(2)(i)(B).
The restrictions apply to specified materials associated with China, Russia, Iran and North Korea under covered defence procurement. This is not a universal ban on Chinese-origin materials in all commercial products. The rules contain defined exceptions, including certain commercially available items, qualifying recycled magnets and situations in which compliant materials cannot be procured in the required quantity, quality and form at a reasonable price.
The expanded requirements nevertheless place greater importance on documenting how materials move through mining, separation, metalmaking, alloy production and magnet manufacturing.
Federal waiver restrictions introduce another obstacle
The regulatory picture became more demanding on 20 July when Executive Order 14415 established tighter conditions for statutory sourcing waivers. Two distinct statutory authorities are involved.
Under 10 U.S.C. § 4872(c)(1), the government may waive sourcing restrictions for a specific end item and covered material when compliant material cannot be obtained in satisfactory quality and quantity, in the required form, when needed and at a reasonable price. Such a waiver is limited to a period not exceeding 36 months.
Section 4872(e) separately permits a national-security waiver allowing acceptance of an end item containing covered material manufactured in a restricted country where the required written national-security determination is made.
Executive Order 14415, Section 2(a), directs that waivers under § 4872(c)(1) cease from 1 January 2027 except under the mitigation-plan arrangements in Section 2(b). Waivers under § 4872(e) are likewise restricted to the mitigation-plan route or the separate process involving a request to the Assistant to the President for National Security Affairs.
Under Section 2(b), a contractor seeking relief through the mitigation-plan route must submit a formal plan accepted by the responsible authority. The plan must identify non-compliant material sources, document exhaustive attempts to obtain compliant alternatives or demonstrate their unavailability at the time of acquisition, and establish steps and a timetable for removing restricted material from the supply chain.
The most consequential provision for suppliers is Section 2(c).
It states that failing to qualify a domestic source does not, by itself, establish nonavailability for a waiver under § 4872(c)(1). An exception requires the contractor to demonstrate active, adequately funded and ongoing efforts to qualify a domestic supplier.
A defence manufacturer therefore cannot assume that a domestic producer’s incomplete certification provides sufficient grounds for statutory relief. Its own documented efforts to qualify a compliant source become central to the waiver assessment. This statutory waiver framework must be distinguished from the nonavailability-determination procedures under the Defence Federal Acquisition Regulation Supplement.
DFARS 225.7018-4 provides for individual nonavailability determinations applying to a particular contract and class determinations applying to multiple contracts. Individual determinations may be made by the head of the contracting activity, while class determinations require approval from the Under Secretary of Defense for Acquisition and Sustainment.
These procurement determinations have their own approval and documentation procedures. They should not be treated as interchangeable with the statutory national-security waiver under § 4872(e). The AIA argues that procurement authorities should preserve practical avenues for dealing with shortages while compliant sources are developed. Its September report recommends class nonavailability determinations and the use of applicable statutory waiver authorities where qualified material cannot be secured.
Those are recommendations from industry, not automatically available exemptions. For suppliers, the immediate task is to document material origin, qualification expenditure, testing progress and attempts to secure compliant alternatives before the deadline.
USA Rare Earth is expanding production in stages
USA Rare Earth’s investment programme illustrates the difference between announced manufacturing capacity and material that can be supplied to defence customers.
The company’s second-quarter 2026 financial results, published on 10 August, confirm that its Commerce Department agreements provide access to up to $277 million in federal funding and up to $1.3 billion in senior secured loan capacity, with disbursements tied to project milestones.
At Stillwater, Oklahoma, the company commissioned its Phase 1A commercial magnet production line in March. Its second-quarter outlook maintained a target of reaching 600 metric tonnes per annum of annualised magnet manufacturing run-rate capacity during the fourth quarter of 2026.
The figure is a capacity target, not reported annual production or confirmed defence-qualified deliveries. The larger manufacturing development is taking place in Blacksburg, South Carolina. USA Rare Earth’s 9 September announcement identifies an investment of approximately $1.2 billion, with planned annual capacity of 6,400 metric tonnes of sintered NdFeB magnets and 5,000 metric tonnes of strip-cast metal and alloy.
Commissioning is expected to begin in 2028. Combined with planned expansion at Stillwater, the company is targeting 10,000 metric tonnes of annual US NdFeB magnet manufacturing capacity.
The facilities represent a significant increase in planned domestic production. However, commissioning schedules, manufacturing yields, material traceability and customer qualification will determine when the capacity translates into dependable defence supply.
MP Materials has an established mining and separation operation
MP Materials provides another example of a US producer developing downstream manufacturing capabilities. Its Mountain Pass operation in California combines rare earth mining and separation with the company’s Independence metals, alloys and magnet operation in Fort Worth, Texas.
In its second-quarter results published on 6 August, MP Materials reported 840 metric tonnes of separated neodymium-praseodymium production, a 41% increase from 597 tonnes a year earlier. The company also reported magnet deliveries from Independence for customer qualification and regulatory testing.
The 840-tonne figure refers to separated NdPr products, not finished magnet output. MP Materials is developing its 10X magnet manufacturing campus in Northlake, Texas. In its 26 February project announcement, the company said it expects to invest more than $1.25 billion, with commissioning scheduled to commence in 2028.
Once operational, the expansion is expected to contribute to combined US manufacturing capacity of approximately 10,000 metric tonnes of NdFeB magnets annually.
MP Materials has also reported a long-term agreement to supply separated gadolinium to a US aerospace and defence customer, demonstrating commercial demand for specific rare earth products beyond conventional NdPr magnet inputs. The company’s existing Mountain Pass–Independence operations give it an established mining and processing route, but expanded qualified magnet output remains a separate manufacturing and customer-approval milestone.
China’s dominance increases further downstream
The International Energy Agency’s Rare Earth Elements report, published on 8 April 2026, shows why processing and manufacturing are central to supply-chain diversification.
According to the IEA, China accounted for 60% of global mined production of magnet rare earths in 2024. Its position was substantially stronger in refining, where it represented 91% of global output, and sintered permanent magnet manufacturing, where its share reached 94%.
These figures cover the principal magnet rare earth elements neodymium, praseodymium, dysprosium and terbium. The imbalance persists in the development pipeline. The IEA estimates that existing and announced projects in diversified regions could provide more than 50,000 tonnes of annual magnet rare earth mining capacity by 2035, measured by rare earth element content.
Corresponding refining and separation capacity remains below 40,000 tonnes. Planned production of metals, alloys and finished magnets from projects announced by early 2026 amounts to approximately 18,000 tonnes on the same rare earth element-content basis.
These estimates use a different measurement basis from manufacturers’ gross magnet tonnage and should not be compared directly. The IEA identifies magnet manufacturing and metallisation, where rare earth oxides are converted into metals and alloys, as particularly acute bottlenecks. It estimates that diversifying the magnet rare earth supply chain to meet projected demand outside China would require approximately $60 billion in public and private investment over the coming decade.
Nearly half of that requirement relates to refining, while magnet manufacturing accounts for approximately one-third. The figures indicate that investment must extend well beyond mineral extraction if countries are to reduce dependence on concentrated downstream industrial capacity.
Processing routes will determine which mineral projects benefit
The US transition is already creating different commercial opportunities for established producers and developing mineral projects. MP Materials has an operating mining and separation business at Mountain Pass connected to downstream manufacturing at Independence, with additional capacity planned at Northlake.
USA Rare Earth’s Round Top project in Texas is at an earlier stage. Its August results describe the commissioning of a hydrometallurgical demonstration facility at Wheat Ridge, Colorado, to test processing routes using Round Top material, third-party mixed rare earth carbonate and recycled magnet scrap.
The project remains in development, and demonstration-stage processing should not be confused with operating commercial separation capacity. USA Rare Earth also strengthened its access to heavy rare earth feedstock through its completed combination with Serra Verde Group on 3 September.
Serra Verde’s Pela Ema operation in Goiás, Brazil, began production in January 2024 and supplies material containing all four principal magnet rare earth elements. The company is continuing an optimisation and commissioning programme as it works towards increased output.
Integrating this feedstock with downstream processing and magnet production could strengthen USA Rare Earth’s supply chain. However, corporate ownership of assets across multiple production stages does not itself demonstrate that all stages are operating at commercial scale or that finished products have been qualified.
The commercial significance of individual projects will increasingly depend on the processing routes available, the specifications customers require and the timing of credible supply agreements.
Skillings view: qualification evidence is becoming commercially important
The combination of the January 2027 restrictions and the July executive order changes the immediate priorities for companies seeking to supply the US defence market.
A mineral producer may have non-Chinese feedstock available, but prospective customers must establish how that material will be processed into compliant products and whether the finished products can satisfy specific technical requirements. For defence contractors, the documentation burden is also increasing. Executive Order 14415 makes the distinction between an unavailable material and an unqualified alternative particularly consequential.
A company seeking a § 4872(c)(1) waiver based on the inability to qualify domestic material must be prepared to show that qualification efforts are active, adequately funded and continuing. That creates an immediate incentive for manufacturers and suppliers to formalise testing programmes, preserve evidence of expenditure and document progress towards qualifying alternative sources.
It may also strengthen the commercial position of mineral and processing projects that can demonstrate a credible route to customer approval, rather than relying solely on announced capacity. The next important operational indicator is USA Rare Earth’s fourth-quarter Stillwater performance, particularly whether it reaches its 600-tonne annualised run-rate capacity target and what progress it reports on customer qualification.
The next regulatory test comes on 1 January 2027.
By that date, defence contractors will need to understand whether compliant materials can be procured in the required specifications or whether the available statutory and procurement procedures permit continued sourcing during the transition.
Major planned capacity at Blacksburg and Northlake is not expected to begin commissioning until 2028.
The immediate question is therefore not whether the United States can eventually manufacture more rare earth magnets. It is whether defence suppliers can demonstrate compliant, qualified sourcing—or meet the conditions for permitted relief—before the next wave of domestic manufacturing capacity becomes available.
