Trump Slaps 15% Tariff on Polysilicon, Sets Minimum Prices for Chip and Solar Imports

Today’s Focus

President Donald Trump signed an executive order Thursday imposing a 15% tariff on imported polysilicon and products made with it, a material used in semiconductor chips and solar panels, the BBC reported. The order also sets minimum import prices on polysilicon and downstream goods, and directs new incentives for domestic producers.

The White House said Trump adopted recommendations from Commerce Secretary Howard Lutnick, following a national security investigation into overseas production of the material. The measures are scheduled to take effect in December, according to the BBC.

Reuters reported the action is part of a broader package aimed at competing with China in solar and chip supply chains. Bloomberg said the administration is weighing a delayed collection window that would give importers time to adjust before duties are actually assessed.

Polysilicon is a refined form of silicon used to make the wafers inside microchips and photovoltaic cells. Trump said in the order that the US share of global polysilicon production fell from about 50% in 2005 to under 2% in 2024, per the BBC, while China now dominates output.

The Wall Street Journal reported the minimum-price mechanism is designed to prevent foreign suppliers from undercutting domestic producers by discounting below a set floor, on top of the 15% duty. The Chinese embassy in Washington said the move “seriously disrupts” bilateral trade and pledged to protect Chinese firms, the BBC reported.

Beijing accused Washington of “abusing state power” against Chinese businesses and warned that protectionism would not restore US competitiveness, according to the embassy statement carried by the BBC. The order caps months of trade friction over chips, critical minerals, and clean-energy inputs between the world’s two largest economies.

The Debate

Supporters argue

Trump framed the tariff as a national security fix for a supply chain that has migrated almost entirely to China. In the executive order text summarized by the BBC, he said the US had “allowed foreign firms to weaken United States producers in the polysilicon sector” for decades and that the material is critical to military electronics.

Commerce Secretary Howard Lutnick, whose recommendations underpin the order, argues the combination of a 15% duty and minimum prices is needed because tariffs alone can be absorbed through price cuts by state-backed Chinese suppliers, according to Reuters and the WSJ.

Domestic solar manufacturers have pushed for polysilicon protection for years, arguing Chinese overcapacity has driven US wafer and cell makers out of business. The Journal reported the administration paired the tariffs with incentives to rebuild US polysilicon capacity, which supporters say is essential to make the CHIPS Act and Inflation Reduction Act investments viable.

Trade hawks in Congress, including Republicans who backed earlier Section 232 chip probes, contend that without a price floor, subsidized Chinese material will continue to flood the market regardless of tariff rates.

Critics argue

The Chinese embassy in Washington said the measure “seriously disrupts” trade and vowed retaliation to protect Chinese firms, the BBC reported. Beijing called the action protectionist and said it would not restore US competitiveness.

US solar installers and utility-scale developers have historically opposed polysilicon tariffs, arguing they raise the cost of finished panels and slow deployment of clean-energy projects at a moment when electricity demand from data centers is climbing sharply. Bloomberg reported the administration is considering delaying collection of the duties, a signal that even inside the White House there is concern about immediate cost shocks.

Critics also note that domestic polysilicon capacity cannot be rebuilt quickly. Reuters reported that new plants take years to permit and construct, meaning buyers will pay the tariff long before US supply can replace imports.

Environmental and consumer groups argue minimum-price rules function as a hidden tax on solar buyers, and that pairing duties with a price floor removes the market pressure that has driven panel costs down over the past decade.

What the experts say

The scale of the shift Trump cited is well documented. The International Energy Agency (IEA) has reported that China accounts for more than 80% of every stage of global solar panel manufacturing, including polysilicon, and that its share in some segments exceeds 95%.

Research by BloombergNEF has found that Chinese polysilicon production costs are roughly 30% to 40% below those of US and European producers, largely because of scale, cheap coal-fired electricity, and state financing. That gap is the core reason tariff-only approaches have historically failed to revive Western capacity, according to BNEF analysts cited in prior industry reports.

The Peterson Institute for International Economics has estimated that broad US tariffs on Chinese goods are largely passed through to US importers and consumers rather than absorbed by Chinese exporters, based on studies of the 2018-2019 tariff rounds. Peterson researchers Chad Bown and others have found little evidence that earlier solar tariffs meaningfully rebuilt US module manufacturing without accompanying subsidies.

The Congressional Research Service has noted that Section 232 national security tariffs face limited judicial review, giving the executive branch wide latitude regardless of economic effects.

By the Numbers

15%: tariff rate on imported polysilicon and downstream products under Trump’s executive order, per the BBC.

Less than 2%: the US share of global polysilicon production in 2024, down from about 50% in 2005, according to figures Trump cited in the order and reported by the BBC.

More than 80%: China’s share of global solar manufacturing capacity across every major stage, according to the International Energy Agency.

30% to 40%: estimated cost advantage of Chinese polysilicon production over US and European producers, per BloombergNEF.

December 2026: month the tariffs and minimum-price rules are scheduled to take effect, according to the BBC.

$52 billion: funding authorized under the 2022 CHIPS and Science Act to boost domestic semiconductor production, per the Congressional Research Service.