Question 1

What is the current U.S. duty rate on Canadian softwood lumber?

Accepted Answer

As of October 19, 2026, the "All Others" (non-selected company) combined duty burden is 34.75%, composed of 10.64% antidumping duty, 14.11% countervailing duty, and a 10.00% Section 232 national security tariff. Company rates differ: Canfor 41.11%, West Fraser 30.02%, and Resolute 35.55% (13.13% AD + 12.42% CVD + 10% Section 232). The All Others figure is the AR7 non-selected company rate, not a rate for every exporter. Firms never covered by a review keep the original investigation cash deposit rates (6.04% antidumping, 14.19% countervailing) plus Section 232. These AR7 final rates replaced the AR6 rates (45.16% for All Others) for entries on or after October 19, 2026.

Question 2

What is the difference between antidumping (AD) and countervailing (CVD) duties?

Accepted Answer

Antidumping duties offset the practice of selling goods below fair market value. Countervailing duties offset government subsidies that give foreign producers an unfair competitive advantage. In the Canadian lumber context, the DOC alleges that provincially administered stumpage fees are below-market subsidies (CVD) and that Canadian producers are selling into the U.S. at prices below fair value (AD).

Question 3

What is Section 232 and how does it apply to lumber?

Accepted Answer

Section 232 of the Trade Expansion Act of 1962 empowers the President to impose tariffs on imports that threaten national security. In September 2025, the administration imposed a 10% tariff on softwood lumber under this authority, effective October 14, 2025, arguing that reliance on foreign timber threatens defense capabilities and industrial resilience. This tariff stacks on top of existing AD/CVD duties.

Question 4

How often do duty rates change?

Accepted Answer

The DOC conducts annual Administrative Reviews (ARs) to recalculate AD/CVD rates based on the most recent Period of Review. The lag between a review period and final results is typically 18–24 months. Executive tariffs (like Section 232) can be imposed or changed at any time by presidential proclamation.

Question 5

What happened with the IEEPA tariffs?

Accepted Answer

In early 2025, the administration threatened a blanket 25% tariff on Canadian goods under IEEPA. USMCA-compliant goods, including softwood lumber, were exempted in April 2025. The entire IEEPA tariff structure was struck down by the Supreme Court in February 2026 (Learning Resources, Inc. v. Trump).

Question 6

How does the DDP net price calculation work?

Accepted Answer

Under Delivered Duty Paid (DDP) terms — the industry standard — the Canadian seller quotes an all-inclusive price. The calculator determines customs value by deducting freight from the DDP price, then solves for the FOB equivalent: customs value = (DDP price − freight) ÷ (1 + tariff rate). Duties equal customs value × tariff rate. The supplier net is the customs value converted to CAD at the current exchange rate. This reflects what the seller actually retains after remitting duties to CBP and paying freight.

Question 7

What is the difference between DDP and FOB pricing?

Accepted Answer

Under DDP (Delivered Duty Paid), the Canadian seller quotes an all-inclusive price covering lumber, freight, and all U.S. duties. The seller acts as the Importer of Record and remits duties to CBP. Under FOB (Free On Board) mill, the buyer takes ownership at the Canadian mill, pays freight, and handles customs. The FOB buyer becomes the Importer of Record and bears the risk of retroactive duty adjustments from Administrative Reviews. U.S. buyers overwhelmingly prefer DDP to avoid this retroactive volatility.

Question 8

Where does LumberFlow get its data?

Accepted Answer

Rate data is sourced from official DOC final and amended final determinations published in the Federal Register, Global Affairs Canada publications, and White House proclamations. All timeline events include direct source links to authoritative government documents, industry analysis, and major news outlets.

Question 9

When is the next administrative review expected?

Accepted Answer

AR7 (covering 2024) final AD and CVD results were published on October 19, 2026 and apply to cash deposits from that date; Commerce said it intends to issue assessment instructions for past entries no earlier than 41 days after publication. AR8 (covering 2025) is underway, with Resolute and West Fraser selected as mandatory respondents; Commerce has not confirmed preliminary or final result dates. Separately, on July 1, 2026 USTR said the U.S. did not renew USMCA "in its current form," though the agreement remains in force — that is a broader trade-policy development, not a change to any softwood duty rate.

Question 10

Are any Canadian softwood lumber products exempt from the AD and CVD orders?

Accepted Answer

Yes, in a narrow case. The orders exclude softwood lumber certified by the Atlantic Lumber Board as first produced in Newfoundland and Labrador, Nova Scotia or Prince Edward Island from logs harvested there. Eligibility depends on certification and documentation, and the exclusion does not automatically cover New Brunswick. The Section 232 tariff is a separate measure, so confirm its treatment of your entry with a licensed customs broker.

Question 11

Does this page constitute legal or customs advice?

Accepted Answer

No. This page is an informational market utility. The calculator outputs are estimates intended for pricing judgment and negotiation framing, not legal, customs, tax, or accounting advice. Always consult a licensed customs broker or trade attorney for binding compliance guidance.

Current US Tariffs on Canadian Lumber 2026 — Duty Tracker

Current Combined Duty Rates (AD + CVD + Section 232)

Current Duty Burden

Duty Rate Timeline

Timeline Events (32)

Get notified when rates change

Tariff Net Price Calculator

Cost Breakdown

Methodology

Frequently Asked Questions

Compare duty-adjusted delivered quotes inside your procurement board

Producer	AD	CVD	Section 232	Total Rate
All Others	10.64%	14.11%	10.00%	34.75%
Canfor	17.00%	14.11%	10.00%	41.11%
West Fraser	4.71%	15.31%	10.00%	30.02%