Act nowU.S. Customs and Border Protection · Tariffs & customsEffective Oct 30, In force4/4 quoted sentences found in the source

The Canada 50 percent duty list changed again on October 30: 22 tariff lines came off, including corrugated boxes and plastic bags, and 100 were added

CBP issued filing guidance for the October 23 proclamation that again changes which Canadian products carry the 50 percent Section 338 duty. From October 30, 2026, 22 tariff classifications under heading 9903.03.14 no longer carry the duty, among them plastic boxes and bags, corrugated cartons, paper sacks, and some plywood. One hundred other classifications were added the same day; CBP's attached list shows them in bold. The other two Canada duty headings did not change.

Entries on or afterOctober 30, 2026
Rate50% ad valorem
Heading9903.03.14

What the document says

Matched to source. The change applies to entries on or after October 30, 2026.
Matched to source. A listed set of classifications no longer carries the 50 percent duty.
Matched to source. One hundred classifications were added.
Matched to source. The other two Canada duty headings are unchanged.

Who does this affect?: U.S. importers of Canadian-made goods and packaging, and Canadian brands shipping to U.S. customers as the importer; anyone who repriced or resourced after the September 15 list.
What it costs: 50% additional duty on the entered value of Canadian goods in the 100 added classifications for entries on or after October 30, 2026; the 50% no longer applies to the classifications removed that day.
What to check: If you buy Canadian-made goods or packaging, ask your broker to check each tariff number against the list attached to CSMS #70314289. Corrugated cartons (4819.10.00) and polyethylene bags (3923.21.00) are among the lines that came off; the 100 added lines are in bold on CBP's list. For entries since October 30 on a removed line, ask whether the duty was still paid.

The headline, summary, who, cost, and what-to-check lines are our reading of the document, not the document’s words and not advice.

Primary source

CSMS #70314289: Further Modifying Section 338 Additional Duties on Certain Goods of Canada