New 15% tariff and minimum import price program imposed on polysilicon and derivatives, effective 120 days after Aug. 6, 2026.

1. What changed

The White House announced that President Donald J. Trump signed a Proclamation establishing new trade remedies on imports of polysilicon and its derivatives. The action includes:

• A minimum import price program on imports of polysilicon and polysilicon derivatives.
• A 15% ad valorem tariff on derivative products that are downstream of polysilicon.
• Authorization for the Secretary of Commerce to establish an incentive program for companies investing in U.S. polysilicon and derivative production (domestic investment incentive; no direct import duty impact).

These remedies are explicitly framed as national security measures to protect and rebuild the U.S. polysilicon industrial base and related supply chains.

2. Affected products

The announcement does not provide specific HTS codes, but it identifies the following product categories as covered:

• Polysilicon (a key input for semiconductors and solar-related applications).
• Polysilicon derivatives.
• Derivative products that are downstream of polysilicon (likely including certain intermediate and finished goods that incorporate polysilicon or its derivatives).

Because no HTS numbers are specified, importers must:

• Identify all imported products that are polysilicon, polysilicon derivatives, or downstream products incorporating polysilicon.
• Monitor forthcoming implementing documents (e.g., Presidential Proclamation text, Federal Register notices, or Commerce/CBP guidance) that will define the precise scope and HTS coverage.

3. Rate changes

The fact sheet specifies one explicit tariff rate change:

• New tariff: 15% ad valorem on derivative products that are downstream of polysilicon.
• Prior rate: Not specified in the fact sheet; in most cases, these products likely entered at MFN rates that were lower than 15%, but the document does not provide specific previous rates.

In addition, a minimum import price program will apply to imports of polysilicon and polysilicon derivatives. The fact sheet does not specify:

• The minimum price levels.
• Whether the mechanism will be a variable duty, reference price, or other formula.
• How the minimum price will interact with existing MFN or other duties.

Further details will need to be obtained from the full Proclamation text and any implementing regulations.

4. Dates

• Proclamation date: August 6, 2026.
• Effective date of remedies: 120 days after signing.
• Effective date (calculated): December 4, 2026 (importers should confirm in the official Proclamation/Federal Register notice).
• Duration/expiration: Not specified in the fact sheet.

Importers should treat December 4, 2026 (or the date confirmed in official documents) as the key implementation date for:

• Application of the 15% ad valorem tariff on downstream polysilicon derivative products.
• Enforcement of the minimum import price program on polysilicon and polysilicon derivatives.

5. Required actions for importers, brokers, and compliance teams

Scope and classification

• Map product universe: Identify all SKUs that are:
• Pure polysilicon.
• Polysilicon derivatives (e.g., chemically modified forms, intermediate materials).
• Downstream products that incorporate polysilicon or its derivatives (e.g., certain semiconductor-related inputs, possibly some solar-related components, depending on scope defined later).
• Review HTS classifications: Confirm current HTS classifications for these products and prepare to align with any new or modified tariff provisions once published.
• Monitor for scope definitions: Closely track the official Proclamation and any subsequent Federal Register notices or CBP/Commerce guidance that:
• Define “polysilicon derivatives” and “derivative products that are downstream of polysilicon.”
• Identify specific HTS subheadings or Chapter 99 provisions.

Duty and pricing impact

• Model duty impact: For all identified products, calculate the impact of a 15% ad valorem tariff on landed cost, margins, and pricing.
• Contract review: Review and, if necessary, renegotiate supply contracts and pricing terms that may be affected by the new tariffs and minimum import price requirements.
• Budgeting: Update 2026–2027 budgets and forecasts to reflect higher duty costs and potential minimum price constraints.

Operational and compliance controls

• System updates: Prepare to update ERP, customs broker instructions, and trade compliance software to:
• Apply the new 15% tariff to covered downstream products.
• Capture any new Chapter 99 or special program indicators once published.
• Broker communication: Inform customs brokers of potentially affected product lines and instruct them to monitor for and implement new tariff provisions as soon as CBP publishes them.
• Entry timing: Consider shipment and entry timing strategies ahead of the effective date to the extent commercially and legally feasible.

Risk management and supply chain strategy

• Sourcing review: Evaluate alternative sourcing options, including:
• Shifting to domestic polysilicon and derivative suppliers.
• Adjusting supply chains to minimize exposure to covered imports, where consistent with law and business needs.
• Origin and valuation controls: Strengthen documentation and controls around country of origin and customs valuation for polysilicon-related imports, as these may receive heightened scrutiny under a national security rationale.
• Trade remedy overlap: Assess whether any existing ADD/CVD, Section 201, or other measures already apply to your polysilicon-related imports and how the new tariffs and minimum price program will interact with them.

6. References

The fact sheet references a Presidential Proclamation but does not provide a direct link. Importers should monitor the following sources for the official text and implementation details:

• The White House fact sheet (starting point for policy announcement):
• https://www.whitehouse.gov (search for “Fact Sheet: President Donald J. Trump Bolsters National Security and Strengthens U.S. Supply Chains by Imposing Tariffs on Polysilicon and its Derivatives” dated August 6, 2026).
• Presidential Proclamation text (likely to include legal basis, scope, and implementation details):
• https://www.whitehouse.gov/presidential-actions/
• Federal Register notices (for detailed implementation, HTS references, and any Chapter 99 provisions):
• https://www.federalregister.gov
• U.S. Customs and Border Protection (CBP) guidance and CSMS messages (for operational instructions to filers):
• https://www.cbp.gov
• U.S. Department of Commerce (for any related regulations and the domestic incentive program):
• https://www.commerce.gov

7. HTS metadata

The fact sheet does not specify any HTS headings, subheadings, or Chapter 99 provisions. Accordingly:

• HTS codes: []
• Importers must wait for the Proclamation and subsequent implementing documents to identify the exact HTS coverage and any new Chapter 99 numbers.

8. Key takeaways

• A new 15% ad valorem tariff will apply to derivative products downstream of polysilicon, and a minimum import price program will cover polysilicon and its derivatives.
• The measures take effect 120 days after August 6, 2026, giving importers a limited window to adjust sourcing, pricing, and compliance systems.
• No HTS codes or minimum price levels are yet specified in the fact sheet; importers must closely monitor forthcoming official documents and proactively map potentially affected products to prepare for implementation.