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President Donald Trump’s October 30, 2026 proclamation revised—not repealed—the additional 50% Section 338 tariff on specified Canadian imports. Seven plywood tariff classifications were removed from that surcharge, while selected wood products, MDF, fiberboard, flooring panels and builders’ joinery were added. The change applies to covered goods entered for consumption, or withdrawn from a warehouse for consumption, at or after 12:01 a.m. Eastern Time on October 30, 2026. Product classification and entry date determine the result; a broad label such as “plywood” or “lumber” is not enough.
What did Trump’s October 30 tariff revision do?
The proclamation amended Proclamation 11048 by replacing part of its Annex I list. Goods in Annex I, Part A are no longer subject to the additional 50% ad valorem Section 338 duty. Goods in Part B became newly subject to it. The proclamation expressly says the modified Section 338 duty applies in addition to any applicable Section 232 duty.
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The operative rule is entry-based: qualifying merchandise must have been entered for consumption, or withdrawn from a bonded warehouse for consumption, at or after 12:01 a.m. Eastern on October 30, 2026. Earlier entries are not automatically changed by the revision.
The proclamation describes the removed goods as products that “shall no longer be subject to the additional ad valorem duty of 50 percent imposed pursuant to Proclamation 11048, as amended.” That language removes the specified articles from this particular surcharge; it does not create a general exemption for Canadian construction materials.
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Which plywood classifications were removed from the 50% duty?
Seven plywood HTSUS classifications were removed from the additional Section 338 tariff:
- 4412.33.06
- 4412.33.26
- 4412.33.32
- 4412.33.57
- 4412.34.26
- 4412.34.32
- 4412.34.57
These codes cover specified plywood sheets distinguished by characteristics such as face-ply construction, thickness and surface treatment. They do not cover every plywood sheet from Canada. An importer must verify the complete HTSUS classification, including the product’s technical attributes, before treating a shipment as removed from the surcharge.
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Part B added the following construction-related classifications to the 50% Section 338 list:
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- 4409.10.05: certain continuously shaped coniferous wood
- 4411.12.10 and 4411.12.90: specified medium-density fibreboard (MDF)
- 4411.92.10: specified fiberboard
- 4418.75.70: certain assembled wood flooring panels
- 4418.91.91: certain builders’ joinery and carpentry
The annex’s product descriptions are informational, not scope-defining. The tariff number and the legal tariff-schedule language control. If a product appears to fit a description but the classification is uncertain, the importer should obtain a classification determination or ask a customs broker before entry.
The White House’s broader summary says the revision also removed some paper products, machinery, refrigeration equipment and packing crates or boxes, while adding certain valves, carpets and waste products. The October action therefore reaches beyond construction, even though the plywood and wood-panel changes are the most relevant to building-materials importers.
Does USMCA origin remove the 50% tariff?
No. The additional Section 338 duty can apply to listed Canadian goods regardless of whether they qualify as originating under USMCA. Origin documentation may still matter for other customs purposes, but it does not by itself override a covered Section 338 assessment.
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Can Section 338 and Section 232 duties stack?
Yes. The proclamation states that the Section 338 duties it modifies apply in addition to applicable Section 232 duties. A shipment can therefore face more than one tariff measure, depending on its classification and the rules attached to that product.
Global Affairs Canada’s current guidance reports separate Section 232 rates of 10% for timber (logs), railway ties and softwood lumber; 25% for certain upholstered furniture; and 25% for kitchen cabinets and vanities. The furniture rate is scheduled to rise to 30%, and the cabinet-and-vanity rate to 50%, on January 1, 2027. As of November 12, 2026, those higher figures are scheduled future rates, not the rates currently in effect.
These percentages are customs-duty rates, not a prediction that a retail price or construction bid will rise by the same amount. The official materials establish the legal rates and product lists but do not quantify effects on consumer prices, project costs or trade volumes.
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How should an importer check a shipment?
Use the shipment’s exact HTSUS classification and entry facts rather than a commercial description. A practical review has five checks:
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- Confirm the code: Verify the full HTSUS number and the product’s specifications, including composition, dimensions, processing and intended use.
- Check the October annex: Determine whether the code is in Part A (removed) or Part B (added).
- Confirm the entry date: Apply the October 30 rule only to merchandise entered or withdrawn for consumption at or after 12:01 a.m. Eastern on that date.
- Screen for other measures: Review Section 232, anti-dumping, countervailing and Section 301 measures that may apply to the same product. Not every Canadian wood product is subject to every measure.
- Document the decision: Retain product specifications, classification support and broker instructions with the entry file.
Global Affairs Canada advises exporters to consult a customs broker when determining whether a product is affected. A broker can also help separate the Section 338 question from any Section 232 or trade-remedy assessment. The U.S. Customs and Border Protection classification process remains the appropriate reference when the tariff language and a commercial description do not align.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What does the revision mean for builders and material buyers?
Canadian plywood in one of the seven removed classifications may no longer carry the additional 50% Section 338 charge on qualifying post-effective-date entries, but other duties can remain. Conversely, MDF, fiberboard, certain flooring panels and builders’ joinery in the newly listed classifications may acquire the surcharge even if they were previously outside this list.
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Contractors should ask suppliers for the HTSUS classification and the duty assumptions used in quotations. Because the law turns on classification and entry timing, a “Canadian flooring” or “Canadian plywood” label alone cannot establish the landed cost. Quotes covering deliveries around January 1, 2027 should also state whether they assume the scheduled Section 232 increases for affected furniture or cabinet products.
What has not changed?
- The October action did not abolish the additional 50% duty for all Canadian building materials.
- It did not make every plywood product duty-free.
- It did not prevent separate Section 232 or trade-remedy duties from applying.
- It did not convert scheduled January 1, 2027 Section 232 increases into current rates before that date.
- It did not replace a formal tariff-classification analysis with the annex’s shortened product descriptions.
Frequently Asked Questions
When did the revised Canadian building-material tariff take effect?
The revised list applies to covered goods entered for consumption, or withdrawn from a warehouse for consumption, at or after 12:01 a.m. Eastern Time on October 30, 2026. The relevant event is the customs entry, not necessarily the date a purchase order was signed or the goods left Canada.
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Are all Canadian plywood products now exempt from the 50% tariff?
No. Only the seven specified plywood HTSUS classifications were removed from the additional Section 338 duty. Other plywood classifications can remain covered, and separate duties may apply even to a removed classification.
Will Canadian cabinets face a 50% Section 232 rate immediately?
No. Global Affairs Canada reports a current 25% Section 232 rate for covered kitchen cabinets and vanities, scheduled to rise to 50% on January 1, 2027. That scheduled rate is separate from the October Section 338 list revision.
Can a shipment be subject to both the 50% tariff and another trade remedy?
Yes. Section 338 can apply in addition to Section 232 duties, and certain forest products may also be subject to anti-dumping, countervailing or Section 301 measures. The combination depends on the product’s exact classification and applicable orders.
Who should resolve an uncertain tariff classification?
The importer should assemble the product’s technical specifications and seek a shipment-specific assessment from a qualified customs broker. Questions that remain unresolved can require guidance or a classification determination from U.S. Customs and Border Protection.
