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On a $100,000 entry of a covered advanced computing chip, the additional Section 232 duty is $25,000. On the identical article, from the identical supplier, entered by the identical importer, the additional duty can be zero. Nothing about the goods changes between those two outcomes. What changes is the end use declared at the moment of entry, and whether the importer can support it.
That is the part of the January 2026 semiconductor action most duty models still have wrong. The measure is narrow, and the narrowness is not the interesting fact. The interesting fact is that Section 232, a program built for years on country of origin and tariff classification, now turns on a use claim.
Two entries, two duty outcomes
CBP set the filing mechanics out in CSMS #67400472, issued January 14, 2026. Covered articles are filed under HTSUS 9903.79.01 and carry an additional 25 percent ad valorem duty. Eight adjacent headings, 9903.79.02 through 9903.79.09, carry zero.
Those eight are not one thing. The first is a statement about the article: 9903.79.02 covers goods classifiable in the provisions that 9903.79.01 reaches, but which do not meet the required technical parameters. That is an engineering fact, settled by a specification sheet.
The other seven are statements about what the importer intends to do with the goods inside the United States. Use in a U.S. data center, defined as a facility requiring more than 100 megawatts of new load dedicated to AI inference, training, simulation or synthetic data generation. Repairs or replacement in the United States. Research and development in the United States, with a three part definition written into the guidance. Use by startups, defined by reference to the emerging growth company standard at 15 U.S.C. 77b(a)(19). Non data center consumer electronics applications, including gaming, personal computing, professional visualization, workstation and automotive applications. Non data center civil industrial applications, including factory robotics and industrial machinery. And U.S. public sector applications.
On paper the split reads generous. Seven of the eight describe ordinary commercial activity, and one of them covers most of what a general electronics importer actually brings across. In practice an exclusion is not a status the company holds. It is a claim filed on a specific line, under a specific heading, on a specific date, and the file behind it either exists at that moment or it does not.
What actually triggers the 25 percent
Three tariff provisions carry the measure: 8471.50, 8471.80 and 8473.30. Those are data processing units and the parts and accessories of data processing machines. The heading for integrated circuits is not in scope. A duty the market calls a semiconductor tariff does not sit on the semiconductor line at all, which is why part masters organized by product family tend to miss it while part masters organized by classification catch it immediately.
Within those three provisions, the article must be a logic integrated circuit, or an article that contains a logic integrated circuit, and it must fall inside one of two performance windows. The first is a total processing performance greater than 14,000 and less than 17,500, combined with total DRAM bandwidth greater than 4,500 GB/s and less than 5,000 GB/s. The second is a total processing performance greater than 20,800 and less than 21,100, combined with total DRAM bandwidth greater than 5,800 GB/s and less than 6,200 GB/s. The complete definitions sit in U.S. note 39(b) to subchapter III of chapter 99 and in the Annex to the proclamation.
Read those numbers twice. Both parameters are bounded above as well as below. These are closed bands, not thresholds. A device more powerful than the upper edge of either window falls outside 9903.79.01, and so does a device that sits in the gap between the two windows. Scope here is a pair of narrow slots, not a floor that everything above it clears.
The legal instrument is Proclamation 11002 of January 14, 2026, published January 20 at 91 FR 2443 under Section 232 of the Trade Expansion Act of 1962. It applies to covered goods from all countries of origin except the United States, which means origin analysis does not determine exposure the way it does under the metals actions. The proclamation is also explicitly a first phase. It directed a joint report from the U.S. Trade Representative and the Secretary of Commerce on the outcome of negotiations by April 14, 2026, and an update from Commerce on the market for semiconductors used in U.S. data centers by July 1, 2026, either of which could support modification. Any expansion would require a subsequent proclamation to be written into the HTSUS. As of this writing, the 25 percent rate and the nine headings stand as issued.
The decision framework
Three questions, in order, and each one belongs to a different desk.
First, is the article classified in 8471.50, 8471.80 or 8473.30? This is a classification question and it is answered from the part master, not from a product catalog. Run it against the three provisions directly.
Second, does the article fall inside one of the two performance windows? This is an engineering question and the commercial invoice will not answer it. The total processing performance and DRAM bandwidth figures come from the manufacturer's technical specifications, and they need to live in the trade compliance file rather than in an engineering folder somewhere upstream.
Third, if the answer to both is yes, which exclusion applies and what evidences it on the day of entry? This is a documentation question, and it belongs to whoever owns the end use. That is almost never the customs broker, and it is frequently not the trade compliance team either.
Q: If our product is excluded, why does the classification work still matter?
Daniel Sánchez, Customs General Manager, Joffroy Global
A: Because the exclusion is claimed inside the same structure. You do not step around 9903.79 by being excluded, you file into it. The part still has to be identified against the three provisions and measured against the bands before you know which of the nine headings you are entitled to. An importer who never ran that exercise cannot demonstrate that 9903.79.07 was the correct answer rather than 9903.79.01. The exclusion and the duty are two doors in the same wall.
Q: Does this duty stack on the metals and vehicle measures we already file?
Daniel Sánchez, Customs General Manager, Joffroy Global
A: Mostly the opposite, and this is the one place the action reduces complexity. Merchandise properly filed under 9903.79.01 is not subject to the additional duties on passenger vehicles and light trucks, on medium and heavy duty vehicles or their parts, on copper, aluminum, steel or their derivatives, nor to the reciprocal tariffs or the Canada and Mexico headings. Section 301 is the exception. It is not displaced, and CBP's reporting sequence puts the Section 301 heading first on the line, ahead of the Section 232 heading. So the answer depends entirely on which layer you mean, and the entry summary has to carry that ordering exactly, with duty associated to the correct heading rather than combined onto one.
The moves that close the gap
Start where the classification lives. Pull the part master and test every item against the three provisions rather than against your own product categories, because the measure follows the tariff line and nothing else. That exercise also surfaces the parts sitting on the wrong provision, which was a rate problem before January and is now a scope problem too.
Then get the specifications into the compliance file. For every part that lands in those three provisions, the total processing performance and DRAM bandwidth figures belong on record, with the source document attached. A part that clears the classification test and fails the band test is entitled to 9903.79.02, and that entitlement is only as good as the sheet that proves it.
Next, put a name on each end use claim. If the operation is relying on 9903.79.03 through 9903.79.09, the statement of use should be signed by the person who decides the use, dated before the entry, and specific enough to survive a request for information. A general assertion that the company sells consumer electronics is not a claim about a shipment.
Across more than 190,000 customs operations a year at 39 plus ports, filing on both sides of the border under a U.S. Corporate Customs Brokerage License and three Patentes Nacionales in Mexico, we see the same failure mode whenever a duty turns on a use rather than on a good. The classification work gets done, because classification has an owner. The use documentation does not, because the person who knows the end use does not file entries, and the person who files entries does not decide the end use.
Finally, know what this measure takes off the table. No drawback is available on these duties. Product admitted to a foreign trade zone must go in as privileged foreign status under 19 CFR 146.41. Goods entered under 9802.00.60 are assessed on the full value of the imported article. And for anyone modeling a cross border flow, the point that costs the most money: a preference claim does not relieve 9903.79.01. Goods eligible for special tariff treatment under a free trade agreement still pay the 9903.79.01 duty in addition to the preferential rate. An operation shipping units or parts north under 8473.30 and building its landed cost off a preference claim will be short by a quarter of customs value on every covered line.
Twenty five percent of customs value is a number a CFO can model. What cannot be modeled is an exclusion the operation believes it qualifies for and cannot evidence, because that exposure appears in no forecast until a request for information arrives and the answer has to be assembled backwards. The discipline this measure rewards is unglamorous. A part master that knows which of three provisions each item sits in. A specification sheet in the trade file rather than in an engineering inbox. An end use statement signed by the person who actually decides the use. Operations holding those three things pay exactly what the tariff says they owe. Operations holding none of them sit somewhere between zero and a quarter of every covered entry, and they will not find out which until someone asks.
Talk to a Joffroy expert about a 9903.79 eligibility review across your part master, including the end use documentation behind any exclusion you are already claiming.
TRADE. UNDER CONTROL.
