Canada–U.S. tariff changes on October 30: relief for some goods, new duties for others

22 codes removed · 100 added. Adopted October 23; effective October 30, 2026, at 12:01 a.m. Eastern. Counts of HTSUS codes, not trade volumes.

Canadian exporters and U.S. importers have a specific change to check before October 30—not a blanket tariff cut. A White House proclamation dated October 23, 2026^[1] changes which products of Canada face an additional 50% U.S. duty under Section 338. Some tariff codes leave the list; others join it. The measure is adopted, but its new scope is not yet effective as of October 25, 2026.

The change in one minute

Annex I, Part A^[3] removes the additional Section 338 duty from 22 distinct eight-digit HTSUS subheadings. Part B adds 100 subheadings. TariffScout counted the codes in each part and cross-checked them against the deletions and insertions in Annex II^[4]. These are counts of tariff classifications—not shipment volumes, trade values, businesses affected or shares of Canadian exports. They do not describe a general 50-percentage-point change across all tariffs.

The effective-time provision^[1] applies to goods entered for consumption, or withdrawn from warehouse for consumption, on or after October 30, 2026, at 12:01 a.m. Eastern time. That legal entry timing matters; a purchase-order date or departure date is not the trigger stated in the proclamation. This is U.S. import treatment for covered Canadian goods, not a new Canadian tariff on imports.

Which goods illustrate the shift?

On the removal side, Part A^[3] includes 4819.10.00: cartons, boxes and cases of corrugated paper or paperboard. It also includes 8422.40.91: packing or wrapping machinery, not elsewhere specified or included. These examples help a business spot a possible match, but they are not a ruling on any particular shipment.

On the addition side, Part B^[3] includes 3305.10.00: shampoos, and 3208.20.00: paints and varnishes based on acrylic or vinyl polymers in a nonaqueous medium. Do not read those examples as covering every cosmetic or every paint. The annex explicitly makes its descriptions informational: the exact legal tariff codes determine scope, and scope questions should go to U.S. Customs and Border Protection.

Relief does not mean duty-free

Removing a code from this particular 50% duty does not establish that the goods enter free of all duties. The proclamation^[1] says Section 338 duties apply in addition to applicable Section 232 duties. Other applicable import requirements still need to be checked. Nothing in this article establishes a shipment’s final charges or a right to a refund.

There is also a specific exception in Annex I, Part B^[3] for civil aircraft and aircraft parts that meet HTSUS General Note 6. Do not generalize that exception to unrelated products or assume that a familiar product name settles eligibility. Ask your broker to confirm the legal conditions against the actual goods and documents.

A five-point check before the entry

1. Confirm the exact HTSUS code. Ask the U.S. importer or broker to verify the eight-digit subheading against the legal annex, rather than relying on a catalogue label.
2. Confirm origin. Establish whether the goods fall within the proclamation’s Canadian-product scope; a Canadian shipping address alone is not a classification or origin decision.
3. Check entry timing. Confirm the expected consumption-entry or warehouse-withdrawal timing against October 30 at 12:01 a.m. Eastern.
4. Check other duties. Ask which other charges remain applicable, including Section 232 where relevant. Keep the Section 338 change separate from a total landed-cost estimate.
5. Get broker confirmation. Give the broker the product specifications, origin documentation and exact annex references before relying on a price or shipping decision.

This checklist translates the proclamation’s scope and timing^[1] and annex conditions^[3] into questions, not individualized customs advice. A Canadian seller and its U.S. buyer should agree who will obtain the entry information and communicate any confirmed cost changes. Avoid promising customers a universal reduction or surcharge before that verification.

Read the rule, then make the decision

Start with the proclamation^[1], read Annex I^[3] for the listed codes and exception, and consult Annex II^[4] for the tariff-schedule amendments. TariffScout’s role here is to make the change easier to follow—not to replace CBP or a licensed customs adviser. The useful next step is a verified shipment review, not an assumption based on the headline.