A Second Wave of Tariffs Is Coming for Canadian Businesses — and This One Has No Expiry Date
Date Published
The Trump administration has launched Section 301 trade investigations against Canada and 59 other countries, building a legal path to open-ended tariffs after the Supreme Court struck down its previous tariff authority. The investigations are expected to conclude by July 24 — the same date current baseline tariffs expire.
Key Insights
The U.S. Supreme Court struck down Trump's IEEPA tariff authority on February 20, 2026, forcing the administration to pursue tariffs through alternative statutes including Section 301.
Canada is named in a 60-economy Section 301 investigation focused on forced labor import prohibitions, with a formal hearing scheduled for April 28, 2026.
Unlike Section 122 tariffs — which expire July 24, 2026 after 150 days — Section 301 duties carry no statutory time limit and can be maintained indefinitely.
Canadian exporters already face a multi-layered tariff structure including 10–15% baseline tariffs under Section 122 and up to 50% on steel and aluminum under Section 232.
The Section 301 investigation is expected to conclude around July 24, 2026 — the same date as the Section 122 expiry — suggesting the administration is positioning one mechanism to replace or supplement the other.
Small businesses with U.S. export exposure or U.S.-linked supply chains should stress-test margins now and review contract terms before the July window arrives.
Canadian businesses are already navigating one of the most complex tariff environments in a generation. Now the Trump administration is building the legal scaffolding for something potentially worse. The U.S. has launched Section 301 trade investigations against 60 countries — Canada included — in a move that could result in a second, open-ended wave of targeted duties with no built-in expiration date.
The investigations, which examine whether countries maintain policies or practices that burden or restrict U.S. commerce, were triggered in part by a significant legal setback. On February 20, 2026, the U.S. Supreme Court struck down Trump's tariff authority under the International Emergency Economic Powers Act (IEEPA), using the major questions doctrine to invalidate what had been the administration's primary tool for imposing broad 'reciprocal' tariffs. That ruling forced a pivot to alternative legal statutes — and Section 301 is now the administration's instrument of choice.
Two Investigations, One Target Window
The administration launched two distinct investigations in quick succession. On March 12, 2026, the U.S. opened a 60-economy Section 301 investigation focused on forced labor import prohibitions — Canada is named in this probe. A separate investigation targeting 16 economies for excess manufacturing capacity was launched a day earlier, on March 11. Hearings for the Canada-facing forced labor investigation are scheduled for April 28, 2026, with the investigation expected to conclude around July 24, 2026.
That July date is not a coincidence. It also marks the expiration of the Section 122 tariffs currently in place — baseline duties of 10 to 15 percent that require Congressional approval to extend beyond 150 days. The administration appears to be timing the Section 301 conclusions to coincide with that expiry, potentially replacing one tariff mechanism with another as the legal window closes.
Why Section 301 Is a Different Animal
Section 301 of the U.S. Trade Act of 1974 gives the U.S. Trade Representative broad authority to act against foreign trade practices deemed unfair or discriminatory. Critically, duties imposed under Section 301 carry no statutory time cap — unlike Section 122's hard 150-day ceiling. If the U.S. concludes its investigation, identifies harm to American commerce, and Canada fails to resolve the underlying issue to Washington's satisfaction, new tariffs can be imposed and maintained indefinitely. That's a structurally different risk than what Canadian businesses have been managing so far.
The process does include procedural steps: public consultations, formal hearings, and a report. But the bar for triggering duties is not especially high. If investigators determine that a country's policies — whether related to labor standards, subsidies, or structural trade imbalances — burden U.S. commerce, that finding alone can justify new measures.
The Tariff Stack Canadian Businesses Are Already Carrying
The Section 301 investigation arrives on top of an already multi-layered tariff structure. Canadian exporters currently face Section 122 baseline tariffs of 10 to 15 percent on most goods, plus Section 232 steel and aluminum duties running as high as 50 percent on raw and semi-processed products — though some USMCA-compliant goods retain exemptions. The exact rates vary significantly by product category and exemption status, and the situation remains fluid as negotiations continue. Adding a third layer of Section 301 duties into that mix would meaningfully increase costs for affected sectors and compress margins that are already under pressure.
What This Means for Your Business
If your business exports to the U.S. — or relies on a supply chain that does — the July 24 window should be on your radar now. The convergence of the Section 122 expiry and the Section 301 investigation conclusion means the tariff picture could shift materially within months. It's worth stress-testing your margins against a scenario where current baseline tariffs are replaced or supplemented by new, open-ended Section 301 duties. Talk to a trade lawyer or customs broker about your specific product classifications and whether any USMCA or sector-specific exemptions apply to your situation.
Businesses with U.S. customers should also be having frank conversations now about pricing, contract terms, and cost-sharing arrangements. Waiting until duties are formally announced leaves you negotiating from a weaker position. If you source inputs from the U.S. or route goods through American distribution, map those dependencies carefully — a second tariff wave under Section 301 would affect those flows too. The April 28 hearings are technically open to public comment through formal channels; Canadian business associations are likely to participate, and it may be worth engaging yours if you're in an affected sector.
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Frequently Asked Questions
What is Section 301 and how is it different from the tariffs Canada already faces?
Section 301 of the U.S. Trade Act of 1974 allows the U.S. government to impose tariffs on countries it finds to be engaging in unfair or discriminatory trade practices. Unlike the current Section 122 tariffs — which are capped at 10–15% and must expire after 150 days unless Congress extends them — Section 301 duties have no built-in time limit. If imposed, they can remain in place indefinitely until the underlying trade dispute is resolved.
Why did the U.S. launch these investigations now?
The timing follows the U.S. Supreme Court's February 20, 2026 ruling that struck down the Trump administration's use of the International Emergency Economic Powers Act (IEEPA) to impose broad 'reciprocal' tariffs. With that legal authority eliminated, the administration is using Section 301 investigations — a more procedurally intensive but legally durable mechanism — to pursue its tariff objectives.
What does the forced labor investigation actually examine about Canada?
The 60-economy Section 301 investigation focuses on whether named countries have policies or practices related to forced labor import prohibitions that burden or restrict U.S. commerce. The U.S. will examine whether Canada's enforcement and trade practices in this area meet American standards. If the investigation finds deficiencies and Canada doesn't address them to Washington's satisfaction, the U.S. can impose retaliatory tariffs.
What should a Canadian small business do right now to prepare?
Start by understanding your specific tariff exposure — product classifications, any USMCA exemptions that apply, and how current tariff layers affect your margins. Consult a trade lawyer or customs broker for product-specific guidance. Review contracts with U.S. customers to understand who absorbs cost increases if new duties are imposed. And watch the April 28 hearing and July 24 expiry date as key inflection points for planning.
Is there any chance the Section 301 investigations don't result in new tariffs on Canada?
It's possible. Section 301 investigations do require a formal finding of harm to U.S. commerce, public consultation, and a report — and the process allows for negotiated resolutions before tariffs are imposed. However, given the current political climate and the administration's stated intent to use these investigations to shore up its broader tariff agenda, Canadian businesses should not assume a benign outcome. Planning for escalation while hoping for resolution is the prudent posture.