At a glance
- Recommended action
- Map HTS coverage, compare contract prices to the MIP schedule, and prepare first-sale documentation before the December 4, 2026 effective date.
- Effective date
- December 4, 2026
- What changed
- A Section 232 proclamation establishes minimum import prices for polysilicon, wafers, solar cells, and modules, plus an additional 15% duty on covered polysilicon derivatives.
- Who is affected
- Importers of polysilicon, ingots, wafers, solar cells, solar modules, and related derivative products.
- Business impact
- Entries on or after December 4, 2026 may face MIP true-up duties, a 15% Section 232 tariff, and stricter CBP documentation. EU/Japan/Korea/Taiwan/Switzerland/Liechtenstein combine to 15%; UK Section 232 is 10%.
Recommended actions
What importers should do next
- Confirm whether imported polysilicon, wafers, cells, modules, or derivatives are covered by the proclamation.
- Compare current and contracted prices against the new minimum import price schedule.
- Prepare documentation showing the first arm's-length U.S. sale meets the MIP or is covered by a pre-proclamation contract.
- Model the additional 15% Section 232 duty on covered polysilicon derivatives.
- Review country-of-origin treatment for EU, Japan, South Korea, Taiwan, Switzerland, Liechtenstein, and UK shipments.
- Evaluate drawback eligibility and any Commerce onshoring-program opportunities.
Key takeaway
Covered solar-supply-chain imports entered on or after December 4, 2026 will need MIP documentation and may face a 15% Section 232 duty on top of existing tariffs.
The President has issued a proclamation under Section 232 of the Trade Expansion Act of 1962 determining that imports of polysilicon and certain polysilicon derivative products threaten to impair the national security of the United States. As a result, the Administration will implement a combination of Minimum Import Prices (MIP), additional tariffs, and domestic manufacturing incentives designed to strengthen the U.S. polysilicon and solar manufacturing supply chain.
The new requirements will apply to covered products entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. Eastern Time on December 4, 2026.
Minimum Import Price Program
The proclamation establishes the following minimum import prices for covered products:
- Polysilicon: $21 per kilogram
- Polysilicon ingots and wafers: $100 per kilogram
- Solar cells: $0.22 per watt
- Solar modules: $0.38 per watt
The Secretary of Commerce may adjust these MIP levels periodically to reflect market conditions and fair-market pricing.
Import Documentation and Enforcement
Importers must provide documentation to U.S. Customs and Border Protection demonstrating that the first arm's-length sale in the United States will occur at or above the applicable MIP, or that the sale is governed by a contract entered into before the date of the proclamation.
If sufficient documentation is not provided, the imported merchandise will be assessed a specific tariff equal to the applicable MIP. If documentation is provided but the entered value is below the MIP, the importer will be required to pay a specific tariff equal to the difference between the declared value and the applicable MIP.
Additional Section 232 Duty and Country Provisions
In addition to the MIP program, covered imports of polysilicon derivatives identified in the proclamation will be subject to an additional 15% ad valorem Section 232 duty.
For imports originating from European Union member states, Japan, South Korea, Taiwan, Switzerland, and Liechtenstein, the combined Column 1 duty rate and Section 232 tariff will equal 15%. For imports originating from the United Kingdom, the applicable Section 232 tariff rate will be 10%.
Domestic Manufacturing, Drawback, and Importer Considerations
The Department of Commerce has been authorized to establish an onshoring program to encourage investment in U.S. manufacturing facilities producing raw polysilicon, ingots, wafers, and solar cells. Companies submitting approved domestic investment plans may receive temporary relief from Section 232 duties on qualified production equipment and covered products needed to support facility construction and expansion.
Manufacturing drawback under 19 U.S.C. §1313(a) and (b) will be permitted for duties imposed under this proclamation when specified criteria are met. Eligibility generally requires merchandise not subject to antidumping or countervailing duty orders, products originating from designated trade agreement partners, and polysilicon content sourced entirely from qualifying partner countries.
Importers of polysilicon, wafers, solar cells, solar modules, and related products should review product classifications, assess pricing against the new MIP requirements, prepare certification procedures, evaluate the additional 15% Section 232 tariff, and consider sourcing alternatives that may qualify for preferential treatment.
Sources
Authority references
- Presidential Proclamation: Adjusting imports of polysilicon and its derivatives into the United States - White House - 2026-08-06
Assess Section 232 solar-supply exposure
Crane Trade Consulting can help review HTS coverage, MIP documentation, and duty exposure for polysilicon and solar imports.