NdFeB Magnet Tariffs U.S. EV Production Impact Explained

Republished by AIC Engineering. All rights belong to the original publisher; see Source below.

Highlights A CGE model shows a 25% tariff on NdFeB magnet imports could collapse domestic EV production while imported EVs fill essentially all U.S. demand. Wind generation is less immediately affected because the system can shift to imported turbines and alternative technologies. Combining magnet import tariffs with domestic production subsidies can make U.S. magnet manufacturing viable, but trade-offs persist elsewhere in the economy. The study warns that fixing one supply-chain chokepoint can simply move rare-earth dependency downstream into finished products like EVs and turbines. Research was supported by the DOE Critical Materials Innovation Hub and used a 2023 U.S. economic baseline.

A new Resources Policy study by Sangita Gayatri Kannan and Roderick Eggert of the Colorado School of Mines and the Critical Materials Innovation Hub models what could happen if imported sintered neodymium-iron-boron (NdFeB) permanent magnets become substantially more expensive in the United States. The result is counterintuitive: under key scenarios, the shock collapses modeled domestic EV production while sharply increasing imports of foreign EVs containing those same magnets. Wind generation proves less immediately affected because the system can shift toward imported turbines and alternative technologies. The authors also find that combining trade measures with subsidies can make domestic magnet production economically viable in their model—but with costs and trade-offs elsewhere in the economy.

REEx Insight: The Chokepoint Can Move The most important finding may not be about magnets at all. It is about where dependency goes when policymakers squeeze one part of a supply chain. Restricting or raising the cost of imported magnets does not automatically eliminate foreign—or Chinese—supply-chain dependence. If the United States cannot competitively manufacture enough magnets, motors, turbines, and other downstream products, the market can respond by importing more finished products that already contain those magnets.

Rare Earth Exchanges® has demonstrated how a majority of rare earth magnets imported in the United States come embedded in other products anyway. Put simply: block the magnet at the border without building the downstream ecosystem, and the magnet can come back inside an EV, motor, or turbine.

The paper demonstrates this vividly in its modeled EV market. When the magnet input becomes more expensive but imported EVs remain available, U.S. EV production collapses in the relevant scenarios and imports fill essentially all domestic EV demand. The economic value-added, manufacturing activity, and employment associated with vehicle production therefore risk migrating overseas along with the magnet dependency. For REEx, this reinforces the importance of thinking in complete industrial chains: Mine → Separation → Metal → Alloy → Magnet → Motor/Component → Finished Product.

The United States can solve one link and remain vulnerable at the next. A new mine does little for magnet security if material must still travel through a concentrated foreign separation or metallization chokepoint. Likewise, domestic oxide and magnet capacity does not guarantee domestic industrial value if America lacks competitive motor, turbine, or other component manufacturing.

There is another important policy lesson. Tariffs and supply restrictions can protect one industry while unintentionally hurting another. A policy designed to reduce reliance on foreign magnets can raise costs for U.S. EV manufacturers, making imported finished vehicles more competitive. The authors explicitly describe this possibility as an upstream restriction operating like an unintended industrial policy against domestic EV manufacturing unless the underlying magnet constraint is addressed.

That strengthens the case for coordinated policy rather than isolated interventions: diversified ex-China supply, domestic separation and metallization, magnet manufacturing, recycling, strategic inventories—and critically, competitive downstream manufacturing.

REEx takeaway supply-chain sovereignty is not achieved when America produces a mineral. It is achieved when the industrial ecosystem can move that mineral economically from the ground into the finished technologies the country needs.

How the Study Worked Kannan and Eggert built a U.S.-focused computable general equilibrium (CGE) model using a 2023 economic baseline. Think of it as an economic "what-if" machine connecting magnets, EVs, conventional vehicles, wind turbines, electricity, trade, labor, and other parts of the economy.

The researchers represented a magnet supply disruption primarily through a 25% import tax on NdFeB magnets and then tested policy combinations involving domestic magnet subsidies and additional tariffs on imported EVs and rare-earth-containing wind turbines. Importantly, the 25% tax is an illustrative modeling shock, not a forecast or simulation of a specific Chinese export-control action.

The Results: EVs Take the Hit The standout result involves automobiles. When magnets alone become more expensive, modeled U.S. EV production collapses in the relevant scenarios, while EV imports rise dramatically and satisfy essentially all domestic demand. Foreign manufacturers effectively deliver the scarce magnets to America already embedded inside vehicles. Domestic magnet support changes the upstream picture. In scenarios recycling magnet-import-tax revenue into a domestic production subsidy, U.S. production supplies 95.9% of magnet demand in one scenario and 85.1% in another. The model assumes U.S. magnet production initially costs 30% more than the benchmark foreign supply, so these percentages should not be interpreted as forecasts of future U.S. market share.

Wind responds differently. Overall electricity generation barely changes, partly because offshore wind represented only about 45 MW—roughly 0.0035% of approximately 1,300 GW of total generation capacity—in the model's benchmark. The system instead adjusts through turbine imports and alternative technologies. Offshore wind becomes significantly more exposed when rare-earth-containing turbines themselves are also made more expensive.

Limitations—and What Comes Next This is economic modeling, not an observed supply crisis. The model is static and treats the United States as a single region trading with an aggregated rest of the world. It therefore cannot fully capture China-specific trade flows, third-country rerouting, bilateral differences, export licensing, or other real-world non-price frictions. Some substitution assumptions also rely on author judgment where empirical estimates are unavailable.

Still, the warning is important: fixing one chokepoint can simply move dependency downstream. The authors point toward inventories, lower magnet intensity, substitution, diversified supply, domestic magnet production, recycling, and domestic production of magnet-containing goods as complementary approaches.

The research was supported by the Critical Materials Innovation Hub, an Energy Innovation Hub funded by the U.S. Department of Energy's Office of Critical Minerals and Energy Innovation and Advanced Materials and Manufacturing Technologies Office. The authors declared no known competing financial interests or personal relationships that could have influenced the work.

Citation: Kannan, S.G. & Eggert, R. (2026). Potential effects on the U.S. vehicle and wind power sectors of a disruption to rare-earth permanent magnet imports. Resources Policy, 122, 106036. Published online September 8, 2026.

Source

• rareearthexchanges.com (2026-09-12)
• Original article: NdFeB Magnet Tariffs U.S. EV Production Impact Explained
• https://rareearthexchanges.com/news/ndfeb-magnet-disruption-ev-production