October 1 has arrived with another U.S. lumber decision hanging over the North American forest sector, but Canadian producers are not entering the moment with a clean slate. Many are already shipping into a U.S. market where anti-dumping duties, countervailing duties and a separate national-security tariff can apply at the same time.
The date stems from a 2025 order requiring the U.S. Commerce Secretary to update President Donald Trump on hardwood timber and lumber imports, the American market and the domestic industry. That review could lead to further trade action, but October 1 is a reporting deadline—not an automatic date for a new tariff. For Canadian mills, the bigger story is how another potential measure fits into a trade system that is already unusually expensive, complicated and unpredictable.
Oct. 1 Is a Report Deadline, Not an Automatic Tariff Date
Trump’s September 2025 wood-products proclamation instructed the U.S. Commerce Secretary to provide the president with an update on hardwood timber and lumber by October 1, 2026. The review is supposed to cover imports, market conditions and the state of the American industry. Its purpose is to give the president information needed to decide whether an additional Section 232 duty on hardwood timber or lumber is warranted. The proclamation specifically leaves open the possibility of a phased tariff and potentially additional duties on products derived from hardwood.
That distinction matters because the date itself does not automatically change the tariff charged at the border. It is fundamentally a decision point inside the U.S. administration. Any new hardwood measure would require subsequent action setting out its scope, tariff rate and effective date. Softwood lumber, meanwhile, is already covered by a separate 10% Section 232 tariff that has been in force since October 14, 2025. The Oct. 1 deadline therefore represents the possibility that Washington could broaden its wood trade restrictions rather than the scheduled arrival of another softwood tariff.
Canadian Softwood Already Faces Several Layers at the Border
Canadian softwood lumber has been subject to U.S. anti-dumping and countervailing duties for years, and the current cash-deposit rates demonstrate just how large those measures have become. Under the sixth administrative review, Canfor’s combined anti-dumping and countervailing rate stands at 47.59%. West Fraser’s combined rate is 26.47%, while the rate covering many other reviewed companies is 35.16%. Those percentages are not the complete tariff picture for covered softwood shipments.
The United States added a separate 10% Section 232 tariff on certain softwood timber and lumber in October 2025. Global Affairs Canada confirms that this tariff applies in addition to applicable anti-dumping and countervailing duties. That means a company covered by the 35.16% combined trade-remedy rate encounters the additional 10% Section 232 layer as well. Rates still vary by producer, administrative-review history and product classification, so there is no universal percentage applying to every Canadian shipment. Even Atlantic lumber qualifying for an exemption from the anti-dumping and countervailing orders remains subject to the Section 232 tariff.
Another Softwood Rate Change Could Arrive This October
The current duty numbers may not remain in place much longer for every producer. The U.S. Commerce Department is completing its seventh administrative reviews of the Canadian softwood anti-dumping and countervailing orders. Preliminary and post-preliminary calculations released during 2026 point toward lower combined trade-remedy rates for several major producers, although those numbers have not yet become final cash-deposit rates.
The latest published calculations put Canfor at a combined 31.37%, Resolute at 25.49%, West Fraser at 20.92% and non-selected respondents at 25.18%. Those percentages do not include the separate 10% Section 232 tariff. More importantly, they remain provisional. Global Affairs Canada says the seventh-review final results are expected by October 2026 and that the sixth-review rates remain effective until the new results are issued for companies covered by the review. For mills planning sales months in advance, that creates an unusual situation: the industry is watching Washington both for the hardwood report and for another recalculation of longstanding softwood duties.
The Lumber Dispute Started Long Before the Latest Trump Tariffs
The disagreement over Canadian lumber is one of the oldest recurring trade disputes between the two countries. The previous bilateral Softwood Lumber Agreement expired in October 2015. After efforts to negotiate a replacement failed, the United States began imposing the current generation of anti-dumping and countervailing duties in 2017. Those measures are different from Trump’s Section 232 tariff even though Canadian exporters can encounter both when a shipment crosses the border.
At the centre of the dispute are fundamental differences in how forests and timber are managed. U.S. producers have argued that provincial timber-pricing systems and other government measures allow Canadian companies to obtain wood on terms that amount to subsidies, while U.S. investigations have also determined that some Canadian lumber has been sold below calculated fair value. Canadian governments and producers have disputed those findings and challenged U.S. determinations through mechanisms including NAFTA, CUSMA, the World Trade Organization and U.S. courts. The result has been years of reviews, appeals, recalculations and cash deposits rather than a durable bilateral settlement.
The Pressure Is Showing Up in Real Mill Decisions
Tariffs are not the only difficulty confronting Canadian forestry companies, but they increasingly appear alongside weak markets and fibre constraints when companies explain painful operating decisions. Canfor offered a particularly clear example in July when it announced the permanent closure of its Fox Creek sawmill in Alberta. The company cited prolonged weak market conditions, high U.S. softwood duties and tariffs, wildfire-related fibre impacts and the end of Alberta’s mountain pine beetle management strategy.
The closure removes roughly 120 million board feet of annual production capacity. Canfor said available wildfire-damaged timber had largely been exhausted and that there was insufficient long-term fibre in the region to support the operation. Its financial results show how quickly conditions can shift: Canfor moved from an adjusted operating loss in the first quarter of 2026 to adjusted operating income in the second quarter as lumber markets temporarily strengthened. Yet management continued to warn about structural fibre and market challenges. For mill towns, the trade dispute is therefore not an abstract argument over percentages. It becomes one factor among several determining whether a facility continues operating.
Canada Remains Deeply Tied to the U.S. Lumber Market
Finding an alternative to the American market is far easier to discuss than to accomplish at the scale required by Canada’s forestry industry. Statistics Canada reported that the country produced about 47.9 million cubic metres of softwood lumber in 2024 and exported approximately 27.9 million cubic metres to the United States. In other words, more than 58% of Canadian softwood production went directly to the American market that year.
The dependence becomes even clearer when the wider wood-products sector is considered. Statistics Canada reported that 86% of Canada’s exported wood products went to the United States in 2024. Global Affairs Canada recorded another 10.63 billion board feet of softwood lumber exports to the U.S. during 2025. Geography helps explain the relationship: mills in British Columbia, Alberta, Ontario and Quebec have decades of infrastructure, customer relationships and transportation networks built around American construction markets. New overseas buyers can absorb some production, while domestic construction offers additional opportunities, but replacing billions of board feet of established U.S. demand is a long-term undertaking rather than a simple change of destination.
American Builders and U.S. Lumber Producers See the Duties Very Differently
The dispute also divides American industries. The Congressional Research Service calculated that the United States imported roughly $7 billion of softwood timber and lumber products covered by the Section 232 action in 2024, with approximately $5.2 billion—or about three-quarters—coming from Canada. Homebuilders consequently argue that restricting Canadian supply can increase construction costs at a time when affordability remains strained. U.S. housing starts were running at a seasonally adjusted annual rate of 1.275 million units in August 2026, including 918,000 single-family starts.
American lumber producers offer a very different interpretation. The U.S. Lumber Coalition argues that trade enforcement is encouraging investment and allowing American mills to regain market share previously captured by Canadian producers. In May, the Coalition said Canada’s share of the overall U.S. softwood lumber market had fallen to around 19% from 34% in 2016 and said U.S. producers had added 8.6 billion board feet of production capacity since then. Those figures come from an industry advocacy organization, but they illustrate why a negotiated solution remains difficult: builders emphasize supply and affordability, while domestic producers emphasize investment and protection from what they consider unfair trade.
Ottawa Is Spending Heavily to Keep Mills Operating and Push Diversification
Canada’s response increasingly combines trade challenges with financial support and an effort to create more demand outside the traditional U.S. channel. Natural Resources Canada says targeted support available to the softwood sector includes about $1.7 billion in loans and loan guarantees, along with another $500 million aimed at product innovation, market diversification and forest-sector transformation. Ottawa has also pursued measures designed to increase the use of Canadian lumber in federal procurement and construction.
The support is becoming visible at individual companies. In September, the federal government highlighted a $30-million loan to British Columbia-based Conifex Timber, noting that most of the company’s products are exported to the United States. Ottawa describes programs like these as liquidity and transition support for tariff-affected companies. The U.S. Lumber Coalition, by contrast, has criticized Canadian government assistance as additional subsidization—a disagreement likely to remain part of future U.S. countervailing-duty proceedings. At home, CMHC has also modelled the potential benefits of using more Canadian wood in housing, estimating that greater domestic use could materially reduce construction costs for some ground-oriented homes under its scenario.
Hardwood Is Smaller Than Softwood in Canada, but the Deadline Still Matters
Canada’s lumber industry is overwhelmingly a softwood industry. Statistics Canada measured 47.9 million cubic metres of Canadian softwood production in 2024 compared with just 858,000 cubic metres of hardwood lumber. That means the direct exposure to a possible hardwood tariff is considerably smaller than the enormous softwood trade already subject to U.S. duties. The economic significance of the Oct. 1 process, however, extends beyond raw hardwood boards.
Trump’s proclamation explicitly allows the administration to consider duties on derivative hardwood products as part of any future action. Depending on how Washington ultimately defined such a measure, the consequences could reach companies producing higher-value manufactured wood products rather than only primary lumber mills. The exact product coverage and tariff level cannot be known from the deadline itself. What can be said is that the administration built a mechanism into the 2025 Section 232 action for another expansion of wood tariffs after reviewing the hardwood market. That possibility is what makes October 1 worth watching.
The Bigger Risk for Mills Is Continued Uncertainty
For Canadian producers, there is no single tariff decision that would suddenly resolve the pressures facing the sector. The Oct. 1 hardwood report could produce no immediate change, or it could eventually lead Washington toward another Section 232 measure. At almost the same time, the seventh administrative review could lower or otherwise alter the anti-dumping and countervailing cash-deposit rates faced by several major softwood exporters. Those two processes operate under different legal authorities and should not be treated as one tariff action.
The practical challenge is that mills must make investment, staffing, harvesting and sales decisions while several policy variables remain unsettled. A lower administrative-review rate would offer some relief to affected companies, but the 10% Section 232 softwood tariff would remain unless separately changed. A new hardwood measure would expand rather than replace the existing framework. After nearly a decade without a new bilateral softwood agreement, October 1 is therefore less a finish line than another checkpoint in a trade relationship that Canadian forestry companies have increasingly had to build into their everyday operating calculations.
