Canada Tariffs and Export Compliance: Cross-Border Requirements

The U.S. Supreme Court struck down IEEPA-based tariffs on February 20, 2026, in a 6-3 ruling in Learning Resources, Inc. v. Trump. Within hours, the White House slapped a replacement 15% global surcharge under Section 122 of the Trade Act of 1974. If you're shipping goods between the U.S. and Canada right now, the tariff rules you followed last month may already be wrong. OFAC's maximum civil penalty under IEEPA still sits at $377,700 per violation (Treasury.gov, 2025).

Key Takeaways:

• CUSMA/USMCA covers over 98% of tariff lines between the U.S. and Canada, but only goods meeting rules of origin qualify for duty-free treatment (Tradecommissioner.gc.ca, 2025)
• Canada removed most retaliatory tariffs on U.S. goods effective September 1, 2025, though 25% counter-tariffs on steel/aluminum/automotive imports remain active (Canada.ca, 2025)
• The February 2026 Supreme Court ruling invalidated all IEEPA tariffs, but Section 232 Tariffs on steel, aluminum, copper, autos, lumber remain unaffected (Supreme Court, 2026)
• Penn Wharton Budget Model estimates approximately $175 billion in potential IEEPA tariff refunds, with over 1,000 businesses already filing claims (Penn Wharton, 2026)
• CUSMA's mandatory joint review begins July 2026; failure to extend triggers annual reviews that inject rolling uncertainty into supply chain planning

What the Current Canada Tariffs Structure Actually Looks Like

Three separate legal authorities now govern US Canada tariffs, and mixing them up costs real money. Section 232 of the Trade Expansion Act covers steel, aluminum, copper, automobiles, auto parts, plus lumber and timber. All at 25%. Section 122 of the Trade Act of 1974 tacks on a 15% surcharge on everything else that doesn't qualify for CUSMA exemption. CUSMA itself still provides duty-free access for qualifying goods, accounting for the vast majority of bilateral trade.

Here's where most compliance teams trip up. A product might clear CUSMA rules of origin and dodge the 15% Section 122 tariff, but still get hit with 25% under Section 232 if it contains steel or aluminum above threshold levels. The layering matters. These tariffs stack on top of each other.

Canadian tariffs on US goods tell a parallel story. Canada pulled back most retaliatory measures on September 1, 2025, removing 25% counter-tariffs on roughly C$44 billion worth of U.S. imports (Blakes, 2025). But the carve-outs for steel, aluminum, automotive goods remain. If you're shipping industrial machinery with significant steel content into Canada, the 25% counter-tariff still applies. Canada explicitly maintained that position during the August 2025 negotiations, and no CUSMA-compliant exemption exists for those sectors.

For anyone searching for a canada import duty calculator: no single tool handles all three tariff layers at once. You need HTS classification first, then a CUSMA origin determination, then a Section 232 product list check, then the Section 122 residual rate.

How CUSMA Rules of Origin Determine Your Actual Duty Rate

CUSMA eligibility boils down to one question — was this product sufficiently produced or transformed in North America? The answer depends on product-specific rules of origin in Annex 4-B. Each HS Code carries its own rule. Some require a tariff shift, others demand a minimum regional value content (RVC) percentage. A handful need specific processing steps completed within a CUSMA country.

Certification of origin changed under CUSMA compared to NAFTA. No prescribed form anymore. Exporters, producers, or importers can certify origin using 5 minimum data elements on any document, including a commercial invoice. Sounds simpler than the old Certificate of Origin form. It isn't. More flexibility means more room for errors, and we've seen CBP audit certifications more aggressively since the IEEPA tariff environment gave companies financial reasons to claim CUSMA preference for the first time.

Plenty of Canadian exporters never bothered with CUSMA before 2025. Their goods entered the U.S. under MFN rates that were already zero or near-zero. Once IEEPA tariffs hit 25% on non-compliant goods, those same exporters scrambled to prove CUSMA origin. Many found their supply chains didn't actually qualify. Too much non-North American content, or missing documentation from upstream suppliers that nobody had ever asked for.

Blanket certificates of origin expire every December 31. Companies that failed to renew 2026 certificates by January 1 lost preferential treatment on every shipment until the paperwork caught up. Late renewals remain one of the most common and expensive compliance failures in Canada import duties from USA calculations.

Record retention under CUSMA runs 5 years. Not 3. Not "reasonable period." Five years of bills of lading, invoices, customs documents, origin certifications. CBP can request verification at any point during that window, and a failed verification doesn't just kill the preference on the audited shipment. It can trigger a review of every shipment from that exporter.

The Supreme Court IEEPA Decision and What Changes for Canadian Tariffs

On February 20, 2026, the Supreme Court ruled that IEEPA does not grant the president authority to impose tariffs. Chief Justice Roberts wrote that the power to impose tariffs falls under Congress's taxing authority, not executive emergency powers (Supreme Court, 2026). The ruling killed both the "Trafficking and Immigration Tariffs" (the original 25% on Canada/Mexico) and the "Reciprocal Tariffs" from Liberation Day.

What didn't change: Section 232 tariffs on steel, aluminum, copper, autos, auto parts, lumber, timber. Section 301 tariffs on Chinese goods. The de minimis exemption suspension. For more context, see our guide on Canada Tariffs on US Goods: Exporter Compliance Guide. All of those rest on different statutory authority and remain fully in effect.

The replacement came fast. Section 122 imposed a 15% global surcharge effective February 24, 2026, with CUSMA-qualifying goods exempted. But Section 122 has a hard 150-day expiration unless Congress extends it. By late July 2026, either Congress acts, the administration finds another legal pathway, or the 15% rate drops to zero. Try building a procurement budget around that timeline.

For companies that paid IEEPA tariffs on Canadian goods since February 2025, potential refunds exist. Over 1,000 businesses had filed refund claims even before the ruling came down (Ropes & Gray, 2026). The mechanics remain unsettled. CBP hasn't announced a formal refund process. The administration signaled resistance. Companies should preserve all entry summaries, duty payment records, internal cost allocation documentation. This litigation could drag on for years.

One edge case we keep seeing. Canadian goods that entered under IEEPA tariffs but would have qualified for CUSMA duty-free treatment face a tricky refund calculation Proving CUSMA eligibility retroactively requires documentation that may not exist if the importer didn't claim the preference at entry.

What Canadian Tariffs Mean for Import Cost Modeling

The volatility in US Canada tariffs makes landed cost modeling unreliable beyond a 90-day horizon. Between February 2025 and March 2026, the tariff rate on a non-CUSMA-compliant Canadian import went from 25% (IEEPA) to 35% (IEEPA increase in August 2025) to 0% (IEEPA struck down) to 15% (Section 122 replacement). Four regime changes in 13 months. No forecasting model handles that well.

GM included $3-4 billion in expected tariff costs in its 2026 financial guidance. Smaller manufacturers don't have that kind of buffer. A mid-market auto parts supplier running 150 shipments monthly across the border can see duty exposure swing by hundreds of thousands of dollars on a single regulatory change.

The practical approach: model three scenarios. Scenario one assumes CUSMA qualification holds and Section 122 expires in July, effective rate near zero. Scenario two assumes Section 122 gets extended, effective rate 15% Scenario three models a return to higher sectoral tariffs at 25-35%. Price contracts to survive scenario two, hedge for three.

Canadian tariffs on US goods pile on another cost layer. Even after the September 2025 rollback, companies importing U.S. steel or aluminum into Canada face 25% duties plus a new 25% tariff on steel derivative products (doors, windows, fasteners, bridges, wind towers) effective December 2025, covering approximately C$10 billion in goods (Canada.ca, 2025). That derivative list keeps growing.

Cross-Border Compliance Beyond Tariffs: Sanctions and Export Controls

Canada tariffs grab the headlines. But tariff classification errors are often symptoms of deeper compliance gaps. A company that misclassifies a product for tariff purposes probably hasn't verified its ECCN either. And if you're not tracking CUSMA origin documentation, odds are you're not running proper sanctions screening on Canadian trading partners.

Canadian sanctions law operates independently from U.S. sanctions. The Special Economic Measures Act (SEMA) and the Justice for Victims of Corrupt Foreign Officials Act create Canada-specific designation lists that don't mirror OFAC's SDN list perfectly. A partner cleared under U.S screening may still be designated under Canadian law. Running both screenings isn't optional if you operate on both sides of the border.

Export controls add another wrinkle. Canada and the U.S. maintain aligned but not identical regimes. The Canadian Export and Import Permits Act governs controlled goods, while the U.S. splits authority between the EAR (BIS) and ITAR (DDTC). A dual-use product classified as EAR99 in the U.S. might still require a Canadian export permit depending on destination and end-use.

The upcoming CUSMA joint review in July 2026 adds longer-term uncertainty. If the parties don't agree to extend, annual reviews begin. That means trade rules could shift every 12 months, and for compliance teams already stretched thin after 2025-2026, contingency planning starts now.

Platforms like Lenzo, Descartes, and SAP GTS offer consolidated screening and classification for SMB exporters.

FAQ

How do I calculate Canada import duties from USA for my specific products?

Start with HS classification at the 6-digit level. Check whether your product meets CUSMA rules of origin using product-specific rules in Annex 4-B. If CUSMA-compliant, most goods enter duty-free. If not, apply Section 232 rates (25%) for covered products like steel, aluminum, autos, plus the Section 122 surcharge (15%) for non-exempt goods. The Canada Border Services Agency's tariff finder gives MFN rates, but you need to layer active retaliatory tariffs on top. No single canada import duty calculator captures all active tariffs simultaneously as of early 2026.

Are Canadian tariffs on US goods still in effect after the September 2025 rollback?

Partially. Canada eliminated 25% retaliatory counter-tariffs on most U.S. goods effective September 1, 2025, covering roughly C$44 billion in imports. But 25% Canadian tariffs remain active on U.S. steel, aluminum, automotive products. Canada also imposed new 25% tariffs on steel derivative products (C$10 billion) effective December 2025. Remission for certain U.S. steel used in Canadian manufacturing expired January 31, 2026, while aluminum remission extends to June 30, 2026.

What happens to US Canada tariffs if CUSMA isn't extended in the July 2026 review?

CUSMA doesn't expire overnight if the review produces no extension. The agreement continues, but annual reviews kick in. That rolling cycle creates persistent uncertainty because either party could trigger termination with enough lead time. Verify that origin documentation, HS classifications, record-keeping all meet current requirements now. Compliance gaps found during heightened scrutiny carry bigger consequences.

Can I get refunds on IEEPA tariffs paid on Canadian imports?

Potentially. The February 20, 2026 Supreme Court ruling invalidated all IEEPA tariffs, giving importers who paid those duties legal grounds for refunds. Penn Wharton estimates approximately $175 billion in total IEEPA collections eligible for reimbursement. But the refund process remains undefined. CBP hasn't announced formal procedures, over 1,000 companies have filed claims, the administration has pushed back. Preserve all entry summaries, duty payment documentation, cost allocation records.

The US-Canada trade corridor moves roughly $700 billion in goods annually. That volume won't shrink because tariff rules got complicated. It just gets harder to manage. Companies tracking canadian tariffs alongside Section 232 rates, CUSMA origin requirements, sanctions screening across both jurisdictions need systems that update when the rules do. The platform consolidates tariff data, sanctions screening, export control information into one compliance layer built for exactly this kind of multi-regime complexity.