Section 232 U.S. Content Rules for USMCA Metals

Section 232 U.S. content calculations are changing for qualifying metal products imported from Canada and Mexico. Importers must distinguish eligible U.S. value from non-U.S. content, apply a mandatory duty floor, and preserve line-level records that support both entry declarations and potential duty drawback claims.

How the Section 232 U.S. Content Framework Works

The Bureau of Industry and Security has defined how U.S. Customs and Border Protection should assess U.S. content in USMCA-qualifying products of Canada and Mexico that are covered by the modified Section 232 metal tariff framework. The guidance is scheduled for publication on October 14, 2026, and applies to covered goods entered or withdrawn from warehouse for consumption on or after 12:01 a.m. ET on that date.

The underlying treatment generally applies to specified aluminum and steel articles in Annex I-C entered from June 8, 2026, through December 31, 2027. For qualifying goods, the 25 percent Section 232 duty applies to non-U.S. content rather than automatically applying to the product's entire value.

Defining U.S. and Non-U.S. Content

U.S. content includes the value attributable to parts that are wholly obtained, entirely produced, or substantially transformed in the United States. It also includes, to the extent that value has not already been counted, the value attributable to:

• Steel melted and poured in the United States
• Aluminum smelted and cast in the United States
• Copper smelted and cast in the United States

Non-U.S. content is calculated by subtracting qualifying U.S. content from the product's total value. The resulting amount becomes the base for the 25 percent duty calculation.

The instruction against counting the same value twice is important. If U.S.-melted steel is already included in the value of a qualifying U.S.-produced part, its metal value generally should not be added again as a separate U.S. content amount. Importers need a valuation methodology that identifies each qualifying component while preventing overlap between part value and raw-material value.

Calculating the Duty and Applying the 15 Percent Floor

The reduced content-based calculation does not permit the effective Section 232 duty to fall below 15 percent ad valorem. Importers must therefore perform two calculations for each affected entry line and use the higher result.

The first calculation applies the 25 percent rate to non-U.S. content. The second applies the 15 percent minimum rate to the product's total entered value. This comparison is necessary even when the importer has extensive documentation showing a high percentage of U.S. content.

A Practical Calculation Example

Assume a qualifying Canadian steel article has a total entered value of $100,000. The importer substantiates $50,000 of qualifying U.S. content.

The non-U.S. content is $50,000. Applying the 25 percent rate produces a duty of $12,500. However, the 15 percent minimum applied to the total entered value produces a duty of $15,000. The importer would therefore owe $15,000 because the floor produces the higher amount.

If the same product contained only $20,000 of qualifying U.S. content, its non-U.S. content would be $80,000. The 25 percent calculation would produce $20,000 in duty, which exceeds the $15,000 floor. The importer would owe $20,000.

This structure means the economic benefit of U.S. content may be limited once the calculation reaches the minimum effective rate. Importers should not assume that every additional dollar of documented U.S. content will reduce duty by 25 cents. Duty forecasting models, landed-cost estimates, and broker instructions should account for the floor at the entry-line level.

CBP implementation instructions are also expected to determine how total value, U.S. content, non-U.S. content, and the resulting duty should be reported. Product-specific classification and reporting questions generally should be resolved with CBP before filing.

Documentation, Entry Controls, and Drawback Implications

A U.S. content claim requires more than a general supplier statement that a product contains American materials. Importers should be prepared to substantiate both the origin and value of the claimed content using records connected to the entered merchandise.

Useful documentation may include bills of materials, purchase records, producer certifications, costed component lists, production records, and statements identifying where relevant metal was melted and poured or smelted and cast. Records should distinguish qualifying U.S. value from processing performed in Canada, Mexico, or another country.

Building a Defensible Review Process

Importers and customs brokers should establish controls that address the following points before entry:

1. Confirm that the product qualifies for USMCA treatment.
2. Determine whether the tariff classification is covered by the applicable Section 232 measures.
3. Identify qualifying U.S.-origin parts and covered U.S.-processed metal.
4. Verify that values are supported by supplier and accounting records.
5. Eliminate duplicate value between finished parts and incorporated metal.
6. Calculate both the 25 percent non-U.S. content duty and the 15 percent floor.
7. Retain the final line-level duty amount assessed by CBP.

The penalty language makes accuracy especially important. CBP must impose penalties to the extent permitted by law when an importer commits fraud or deliberately misleads the government concerning U.S. content. Compliance teams should therefore avoid unsupported estimates, broad portfolio-level percentages, or supplier assertions that cannot be traced to the imported product.

The calculation also affects duty drawback. A drawback claim can generally be based only on duty that was actually paid and remains eligible under the applicable drawback framework. When the U.S. content adjustment changes the Section 232 amount assessed on an entry line, the resulting paid amount becomes a critical drawback data element. Brokers and drawback filers should preserve entry summaries, line-level calculations, CBP assessment data, and any subsequent corrections. Using a standard 25 percent assumption could overstate the available duty and create a mismatch between the claim and the underlying import record.

Frequently Asked Questions

Which imports are affected by the U.S. content definition?

The definition applies to covered USMCA-qualifying products of Canada and Mexico subject to the modified Section 232 treatment. Importers must still confirm the product's classification, USMCA qualification, entry date, and inclusion in the relevant product coverage before applying the content-based calculation.

Does all material purchased from a U.S. supplier qualify as U.S. content?

Not necessarily. Supplier location alone does not establish that a part was wholly obtained, entirely produced, or substantially transformed in the United States. Importers generally need evidence addressing production origin, relevant metal processing, and the value attributable to the qualifying U.S. content.

Can U.S.-processed metal and a U.S.-produced part both be counted?

They may both contribute to U.S. content, but the same value cannot be counted twice. If the value of U.S.-melted steel is already incorporated into the documented value of a qualifying U.S.-produced part, that metal value generally should not be added again.

Does 100 percent U.S. content eliminate the Section 232 duty?

Generally, no. The framework imposes a minimum total effective duty of 15 percent ad valorem. Even if the content-based calculation produces a lower amount, the importer must apply the minimum duty to the product's total value.

Why does the calculation matter for duty drawback?

Drawback depends on the duty actually paid on the designated import entry, subject to eligibility and other applicable requirements. The U.S. content calculation can reduce the Section 232 duty assessed, while the 15 percent floor can limit that reduction. Accurate line-level assessment data is therefore essential when establishing the duty available for a drawback claim.

How Stable Software Can Help

Supporting Accurate Drawback Claims

Changing Section 232 assessments increase the importance of preserving the exact duty paid on each import line. Drawback filers need reliable entry data rather than assumptions based on a standard tariff rate, particularly when U.S. content and the 15 percent floor produce different results across products.

DrawbackAI is flat-license duty drawback software that U.S. customs brokers can white-label for importer clients and use to file under their own filer codes. Stable Software charges a flat software license and never takes a percentage of the refund. Brokers evaluating how to manage content-adjusted Section 232 duty amounts can explore DrawbackAI as part of a scalable drawback filing process.

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