Polysilicon Minimum Import Price Reaches the First Arm's-Length U.S. Sale
The new price floor turns a later arm's-length U.S. resale into an entry-stage customs record. Missing documentation can produce the full MIP duty even when the partner-country ad valorem formula applies.
Primary lensCustoms enforcement
Sub-topicClassification and valuation
Evidence base4 records used
Use caseCustoms exposure review
Beginning December 4, avoiding the full MIP specific duty will depend on a sale that often has not happened yet. The White House proclamation on polysilicon and its derivatives, August 6, 2026 tells CBP to accept entry documentation establishing or certifying that the first arm's-length U.S. sale, or an applicable covered downstream sale, will occur at or above the relevant minimum import price.
Missing documentation triggers a specific duty equal to the full MIP. When documentation is supplied but the entered value is below the floor, the proclamation calls for a specific duty equal to the shortfall. Covered ingots, wafers, cells, and modules can receive both a new ad valorem duty and the separate MIP duty. Raw polysilicon receives the MIP heading but not the new derivative ad valorem headings.
The 15 percent formula for Japan, South Korea, Taiwan, Switzerland, Liechtenstein, and the European Union does not cap the separate MIP duty or all other charges. When entered value meets the floor, a resale pursuant to fixed terms in a time-limited contract entered before August 6 offers a narrow route out of the MIP duty. The proclamation and annexes do not specify the entry-document format, corrections, or treatment of later price changes. Importers can still map data owners, qualifying contracts, and price-change events now.
The price floor reaches past entered value
A conventional tariff calculation begins with classification, origin, entered value, and a rate. The MIP adds a forward-looking fact. To avoid the full-MIP default, the importer must support the first arm's-length sale that will occur in the United States. If the imported material will not be resold, Annex II looks to the price of an applicable covered downstream product made from it.
The customs file therefore needs information that may sit outside the customs team. Sales personnel may own the resale contract. A manufacturing affiliate may know which imported feedstock entered a wafer, cell, or module. Finance may control rebates and credit notes that change the effective price. A customer may be the only party able to document the first arm's-length transaction.
Entered value alone is insufficient to avoid the specific-duty headings. U.S. note 42 requires documentation supporting one of three conditions when entered value meets or exceeds the relevant MIP. The product is not resold and an applicable covered downstream product will meet its MIP, the product is resold at or above its MIP, or the resale follows qualifying fixed terms in a pre-August 6 contract. Price at entry and price after entry are separate parts of the test.
The proclamation uses a slightly different enforcement path when entered value is below the MIP. With the required documentation, the specific duty equals the gap between entered value and the floor. Without the documentation, the duty equals the full MIP. Documentation failure can therefore cost more than the price shortfall it was supposed to explain.
The importer documents a sale that has not happened
The qualifying resale may not have occurred when the importer files the entry documentation. Clause 2 directs CBP to accept a record establishing or certifying that the sale will occur at or above the floor. A document that is accurate when filed can still depend on conduct weeks or months later.
Post-entry price changes therefore become a customs control issue, not just a sales issue. The proclamation does not say how CBP will treat discounts, credits, returns, or related-party pricing when it tests the documented sale price. Those events should return the entry record for review until implementation rules provide a different answer.
Commerce may issue rules on related-party manipulation and foreign subsidies, and CBP must monitor the documents submitted at entry. The proclamation and annexes do not say how the agencies will test net price or trace imported material into a downstream product. Importers can identify transactions and data owners now while leaving those unresolved legal tests open.
The policy reaches further than an agreement with the foreign seller. An importer may need resale-price covenants from a U.S. distributor, audit access to a manufacturing affiliate, and notice before a customer receives a price adjustment. Those are domestic commercial terms prompted by a border measure.
Missing records carry the full price-floor duty
The White House Annex I with covered tariff lines and minimum prices sets four floors. They are $21 per kilogram for raw polysilicon, $100 per kilogram for covered ingots and wafers, $0.22 per watt for cells, and $0.38 per watt for modules. Each is a unit-price benchmark, using kilograms for raw material and wafers and watts for cells and modules.
If an importer submits no qualifying documentation, clause 2(b) imposes a specific duty equal to the applicable MIP. A module entry without the required record can therefore face $0.38 per watt as a specific duty even if the entered value on its entry summary was only modestly below that level. If the importer supplies the documentation and the entered value is below $0.38 per watt, clause 2(c) instead calls for the difference between the entered value and $0.38 per watt.
Documentation status therefore belongs in the landed-cost model alongside product, origin, entered value, and rate.
Entry-control matrix for goods entered or withdrawn for consumption on or after December 4, 2026. The table summarizes the proclamation and annexes as issued on August 6. It is not a CBP filing instruction or a calculation of any company's duty liability.
Covered product
MIP
New derivative ad valorem layer
Sale record tied to the MIP
Stated result when the entry record is missing
Raw polysilicon under 2804.61.0000
$21/kg
None under headings 9903.45.30 through 9903.45.32
First arm's-length U.S. resale, applicable covered downstream-product sale when the material is not resold, or qualifying old contract
$21/kg specific duty
Covered ingots and wafers under listed 3818.00 statistical lines
$100/kg
15 percent default, partner formula, or 10 percent UK treatment
First arm's-length U.S. resale, downstream-product sale, or qualifying old contract
$100/kg specific duty
Solar cells under 8541.42.00
$0.22/W
15 percent default, partner formula, or 10 percent UK treatment
First arm's-length U.S. resale, downstream-product sale, or qualifying old contract
$0.22/W specific duty
Solar modules under 8541.43.00
$0.38/W
15 percent default, partner formula, or 10 percent UK treatment
First arm's-length U.S. resale or qualifying old contract
$0.38/W specific duty
The table separates the full-MIP default from the shortfall rule. A documented entry below the floor follows the shortfall language in clause 2(c). The final entry syntax, reconciliation method, and supporting-document fields still depend on CBP implementation.
Fifteen percent is not the all-in ceiling
The White House Annex II with U.S. note 42 and headings 9903.45.30 through 9903.45.36 opens with the stacking rule. Covered derivatives may be subject to both the applicable ad valorem heading from 9903.45.30 through 9903.45.32 and the applicable specific-duty heading from 9903.45.33 through 9903.45.36. Country and product determine the ad valorem layer. Price and documentation determine the separate MIP layer.
The partner formula is precise. For products of Japan, South Korea, Taiwan, Switzerland, Liechtenstein, and EU member states, Column 1 plus the additional ad valorem Section 232 duty totals 15 percent. If the ordinary rate is lower than 15 percent, heading 9903.45.31 supplies the balance. That equation does not include the specific MIP heading.
For UK goods, heading 9903.45.32 adds 10 percent to the applicable subheading. It is not a 10 percent all-in formula.
Annex II also states that antidumping, countervailing, and other duties and charges continue to apply. Goods eligible for a free trade agreement or preference still pay the new Chapter 99 duties in addition to the special rate otherwise available. A country label alone cannot produce a reliable landed-cost number.
Raw polysilicon follows a different formula from the derivative products. Annex II assigns the $21-per-kilogram MIP heading to 2804.61.0000, but the new 15 percent derivative headings cover listed ingots, wafers, cells, and modules. Treating every polysilicon-related line as subject to both layers would overstate the rule for raw material.
A pre-August 6 contract needs more than a date
The exception is not simply for any purchase order signed before the effective date. Annex II requires fixed terms in a time-limited contract entered before August 6, the date of the proclamation. A contract signed during the four-month implementation window is too late under the issued text.
The record should show more than a date. It should identify the product, quantity or quantity method, price terms, parties, and duration that make the resale fixed and time-limited. Amendments made after August 6 deserve separate review. A change to price, volume, counterparty, or duration could make it difficult to say that the later sale remains pursuant to the original fixed terms.
The proclamation and annexes do not supply a material-change test or say whether a master agreement, release order, or related-party arrangement qualifies. A date stamp alone does not establish the exception.
This exception also does not erase the whole tariff stack. It is one route for keeping the MIP specific-duty headings from applying only when entered value also meets or exceeds the floor. A below-floor entered value still follows the shortfall rule in clause 2(c). The derivative ad valorem layer and any other applicable duty remain separate questions.
A material failure can reach the corporate group
CBP can impose a consequence far larger than the duty on one entry. If CBP finds a material inaccuracy or a material failure to comply with the certification, the proclamation permanently bars the importer and its affiliates from importing covered polysilicon and derivatives. It also permits other penalties consistent with applicable law.
The proclamation does not define affiliate or describe a correction and review process. Until CBP supplies those procedures, entries should receive centralized review before filing. Any later change to the documented sale price should return to the same reviewer before it is granted.
Solar pricing supports a semiconductor objective
The tariff lines explain why a semiconductor rationale produces a solar price floor. The proclamation says semiconductor-grade material accounts for 2.4 percent of global production and that higher-volume solar-grade output supports plant economics. That rationale does not widen Annex I, which controls the covered polysilicon, ingot, wafer, cell, and module lines. A separate Traverse Analysis of the Section 232 semiconductor policy stack addresses finished-semiconductor and investment-linked tariff treatment.
Drawback requires a separate origin record
The proclamation allows a limited manufacturing drawback path for the new duties, but only when three conditions are met. The article cannot be of a type covered by an antidumping or countervailing duty order. It must be a product of a named Trade Agreement Partner. Its polysilicon content must be entirely from a Trade Agreement Partner country.
That condition creates a separate traceability test. The text requires all polysilicon content to originate in a partner country, even when the finished article is assembled in a partner country.
Keep the records distinct. The MIP documentation turns on price and resale, while the drawback claim also depends on finished-product and feedstock origin and the absence of a relevant antidumping or countervailing duty order.
The entry file will cross several functions, including classification and origin, sales contracts, downstream production records, and finance adjustments. Assign a named owner for each record and for the old-contract review. The importer may also need rights to obtain supporting records from customers and affiliates, not just internal access.
Reopen the file when the customer, price, rebate, return, product conversion, origin, or affiliate changes. An audit is too late to discover that no one retained the supporting record.
What could change the entry analysis
Three implementation points remain open. The proclamation and annexes do not specify the CBP entry-document procedure, including correction and verification. They leave Commerce room to address related-party sales, subsidies, and substantially equivalent partner MIPs through later rules or guidance. Any technical HTS correction or later modification must arrive through a Federal Register notice. Annex II currently contains a duplicated number in one cross-reference, and the proclamation expressly authorizes technical corrections.
Until those records appear, the reliable conclusion is narrow. Beginning December 4, the Section 232 authority will reach the first arm's-length U.S. sale of these products through documentation submitted at entry. The broader Section 232 record will show how that mechanism develops. The headline percentage is not enough to clear a shipment, price a contract, or measure the consequence of a missing document.
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