Articles
Long-form guides on how U.S. tariffs actually stack, with worked examples and citations back to the official source.
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October 19, 2026
U.S. tariff changes coming from November 2026 to February 2027
Four dated tariff changes fall between November 9, 2026 and February 9, 2027, and two of them could still be extended. China Section 301 exclusions end, the maritime Section 301 suspension ends, polysilicon gets a new Section 232 duty, and a 25% duty starts on some drone components.
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August 26, 2026
The 25%-or-50% quartz tariff: an importer's guide to the Section 201 safeguard
Quartz surface products entering the US on or after August 15, 2026 pay an additional 25% inside a quarterly quota or 50% above it, under the first new Section 201 safeguard since 2018. Three HTS codes are covered, 124 origins are excluded, and nobody can quote you a single all-in rate. Here is how the quota works and what to check before your next entry.
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August 3, 2026
The 100% pharmaceutical tariff now applies to every company: the fact your HTS code can't tell you
Since September 29, 2026, the Section 232 duty on patented pharmaceuticals and their ingredients reaches every company, not just the 17 named in Annex III. The rate is 100%, 15% or 0% depending on origin, but only if the product is patented. Generics owe nothing under this action, and no HTS code says which one you import. Here is how to tell which side you are on, and why any single number for a covered line is an assumption you should check.
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July 23, 2026
The Section 122 reciprocal surcharge ends July 24: what changes for your rates
The 10% Section 122 reciprocal surcharge expired after July 23, 2026. From July 24, lines that carried it drop 10 points, unless the surcharge was already suppressed by Section 232 or an exemption, or the origin is one of the 60 economies in the Section 301 forced-labor action that took effect the same day. Here is what moves, what does not, and how to price the boundary.
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July 23, 2026
Brazil's 25% Section 301 tariff: what importers need to check
On July 22, 2026, an additional 25% Section 301 duty took effect on products of Brazil under HTS 9903.05.01. It is country-wide, it stacks on your base rate, and it carves out Section 232 goods and an 864-provision exemption list. Since July 24 a second Section 301 duty, the 12.5% forced-labor duty, stacks on top. Here is how it resolves and what to check on Brazilian lines.
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July 22, 2026
Canada's Section 338 tariff and import ban: what applies to Canadian goods now
Since September 29, 2026 some Canadian alcohol, some dairy-list products and motorcycles over 800cc cannot be imported at all. The 50% Section 338 duty still applies to the rest of the three lists, the lists changed on September 15, and Section 232 goods are no longer carved out except on dairy. Here is what applies to a Canadian line today and how to check yours.
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May 27, 2026
How HTS tariff stacking actually works (with worked examples)
A duty rate is rarely one number. Most U.S. imports pay several duties at once, and some duties suppress others by law. Here is the current program roster, the carve-outs, and four worked examples you can verify against the official source.