China will maintain anti-dumping duties on solar-grade polysilicon from the United States and South Korea and continue countervailing duties on U.S.-origin supplies, following expiry reviews that concluded removing the measures would likely trigger renewed dumping or subsidisation and sustained harm to domestic producers, the Ministry of Commerce (MOFCOM) announced on Tuesday.

From 14th January 2026, anti-dumping tariffs on solar-grade polysilicon imports from the U.S. and South Korea will be extended for a further five years, with rates unchanged. U.S. companies will continue to face duties of 53.3% to 57%, while South Korean producers will remain subject to a range of 4.4% to 113.8%, depending on the firm involved.

The measures apply to solar-grade polysilicon used in the manufacture of crystalline silicon photovoltaic cells. Electronic-grade polysilicon for semiconductor production is excluded. MOFCOM determined that ending the anti-dumping regime would risk a continuation or recurrence of dumping and associated injury, and recommended prolonging the tariffs—a proposal subsequently endorsed by the Customs Tariff Commission of the State Council.

In a separate decision, China will also continue countervailing duties on U.S.-origin solar-grade polysilicon for another five years from 14 January 2026. MOFCOM found that terminating these measures could see subsidies persist or reappear, with ongoing damage to the domestic industry. Under the ruling, countervailing rates for U.S. producers remain at 0% to 2.1%, with Hemlock Semiconductor Corp and AE Polysilicon Corp set at 2.1%, while several other U.S. manufacturers remain exempt.

Both the anti-dumping and countervailing actions cover products classified under tariff code 28046190. Importers must pay the applicable ad valorem duties to Chinese customs.

MOFCOM said the decisions comply with China’s anti-dumping and countervailing frameworks, noting that parties may seek administrative reconsideration or pursue legal action if dissatisfied. Zhou Mi, a senior researcher at the Chinese Academy of International Trade and Economic Cooperation, said the investigations follow established procedures that assess pricing, material injury and causation, with decisions grounded in evidence and the rule of law. Should market conditions normalise and exports cease to harm China’s industry or distort competition, measures could be adjusted, he added.

China first imposed anti-dumping duties on solar-grade polysilicon from the U.S. and South Korea and countervailing duties on U.S.-origin product in January 2014, renewing and adjusting them in January 2020 for five years. In January 2025, at the domestic industry’s request, MOFCOM launched expiry reviews to determine whether lifting the duties would revive dumping or subsidisation and continue injuring Chinese producers. The latest extensions follow those reviews.

Source: Dimsum Daily