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Trump administration to impose 15% tariff in polysilicon probe meant to counter China

By Thomson Reuters Aug 5, 2026 | 2:55 PM

By Nichola Groom, Alexandra Alper and Jarrett Renshaw

WASHINGTON, Aug 5 (Reuters) – The Trump administration will announce as soon ​as Thursday a 15% tariff ‌and a series of price floors on products made from polysilicon, the key raw material used in solar panels and semiconductors, according to ‌four ​sources familiar with the ⁠matter.

The move aims ⁠to protect U.S. polysilicon factories from growing Chinese ambitions in the chip supply chain.

The proclamation by U.S. President Donald ​Trump is expected to include minimum import prices on polysilicon, wafers, cells ⁠and modules, or solar ⁠panels, and a 15% tariff ​on the polysilicon derivatives, the four sources ​said.

The administration’s plan to pursue a ‌hybrid system combining a minimum import price with tariffs was first reported by Reuters.

Trump’s year-long national security investigation into ⁠polysilicon by the Commerce Department also has major implications for the growing domestic solar manufacturing industry ⁠at ‌a time when the U.S. ⁠leader has rolled back federal ​support ‌for renewable energy.

The Commerce Department ​and the ⁠White House did not immediately respond to requests for comment.

(Reporting by Nichola Groom in Los Angeles; Alexandra Alper in Washington and Jarrett Renshaw in Washington; Editing by ​Lisa Shumaker)