Trump's Replacement Tariffs Take Effect July 24 — What the CUSMA Exemption Actually Means for Canadian Exporters

What This Means for You

If you run a business that ships goods to the United States, work in a trade-exposed industry, or simply buy imported goods in Canada, a new round of U.S. tariffs took effect at 12:01 a.m. Eastern time on July 24, 2026 — and this time they are actually in force, not proposed. Based on our review of the U.S. Trade Representative's Section 301 order, Global Affairs Canada's response, and the CUSMA rules of origin that determine who actually pays, here is what you need to check this week, regardless of whether you think this tariff round affects you.

If You Export to the United States:

Immediate action:

Confirm, in writing, whether every product line you ship qualifies for CUSMA preferential treatment. Only goods that meet the Canada–United States–Mexico Agreement's rules of origin are exempt from the new 10% Section 301 duty. If your customs broker has been filing shipments under the most-favoured-nation tariff schedule rather than claiming CUSMA preference — a common paperwork shortcut for smaller exporters — those shipments are now exposed even if the underlying product could qualify.
Pull your bill of materials for every non-CUSMA-compliant product and identify the specific input causing the failure. In most cases it is a component sourced from outside Canada, the U.S., or Mexico that pushes the product below the regional value content threshold (commonly 60% to 65%, depending on the HS code).
Ask your customs broker directly whether a CUSMA certificate of origin has been filed for each SKU shipped since July 24. If the answer is no, you are likely paying the new duty on shipments that could otherwise be exempt.

What to prepare:

Run the actual cost exposure, not an estimate. On a $1 million annual shipment of non-CUSMA-compliant goods, a 10% duty is $100,000 a year — often more than the cost of re-sourcing a single input to restore CUSMA eligibility.
Watch for a possible second filing deadline. According to CNBC, the tariffs were challenged in court within hours of taking effect, and trade policy researchers at the Peterson Institute for International Economics have said the legal basis may not survive a challenge. That means duties paid now could, in principle, become refundable later — so keep every customs entry and duty payment record from July 24 onward in case a refund process (similar to the one set up after the IEEPA tariffs were struck down) becomes available.

Resources:

The Canada Tariff Finder (tariffinder.ca) lets you check a product's HS code against its specific CUSMA rule of origin.
Global Affairs Canada's trade commissioner service (deloittetradecompliance and tradecommissioner.gc.ca) can review documentation questions for exporters directly.
Global Affairs Canada's July 23, 2026 statement from Minister Dominic LeBlanc on the Section 301 tariffs is the authoritative government summary of what is and is not covered.

Example scenario: A Manitoba agricultural equipment manufacturer shipping $3 million a year to U.S. dealers, with roughly 15% of its product line using hydraulic components sourced from a non-CUSMA country, would face about $45,000 in new annual duty on that portion alone. Switching to a Canadian or U.S. hydraulics supplier at a 4% cost premium would add about $18,000 in input costs while eliminating the $45,000 duty — a net saving of roughly $27,000 a year, and it would also restore CUSMA eligibility for future contracts.

If You Import or Buy Imported Goods in Canada:

Expect the direct impact on Canadian consumer prices to be limited, since this tariff is imposed by the U.S. on goods entering the U.S., not by Canada on goods entering Canada. The exposure runs through Canadian exporters' costs and competitiveness, not through a new charge at Canadian checkouts.
Watch sectors most likely to pass costs through to Canadian buyers indirectly, including cross-border e-commerce sellers who source non-CUSMA inputs and price in U.S. dollars, and Canadian retailers of U.S.-assembled goods that themselves rely on non-CUSMA, non-U.S. components.

If You Work in a Trade-Exposed Industry:

Ask your employer directly whether your product lines are CUSMA-compliant, since the duty exposure — not the tariff announcement itself — is what could affect production volumes, shift schedules, or hiring in the months ahead.
Track whether your sector is named in ongoing exemption requests. Industry associations in forestry, agriculture, and manufacturing have historically filed sector-wide comments during Section 301 proceedings, and a similar comment period accompanied this order.

The News: What Happened

According to reporting from NPR, CNBC, and Fortune, the Trump administration imposed new tariffs of 10% to 12.5% on imports from 60 trading partners, effective for goods entered for consumption on or after 12:01 a.m. Eastern time on July 24, 2026. The action uses Section 301 of the Trade Act of 1974, which authorizes tariffs in response to unfair trade practices, and specifically targets what the U.S. Trade Representative describes as insufficient enforcement of bans on goods made with forced labour.

As reported by Fortune and technology-and-trade outlet Tech Times, the new duties replace tariffs the administration had previously imposed under the International Emergency Economic Powers Act (IEEPA), after the U.S. Supreme Court ruled 6-3 in Learning Resources, Inc. v. Trump on February 20, 2026, that IEEPA does not authorize the president to impose tariffs. Chief Justice John Roberts, writing for the majority, held that the statute does not enumerate tariff power among the president's authorities and that, under the major questions doctrine, no such authorization could be inferred.

According to Global Affairs Canada, Minister Dominic LeBlanc confirmed on July 23, 2026 that the United States would proceed with Section 301 duties covering Canada among the 60 named economies, and stated that goods compliant with CUSMA's rules of origin, along with products already subject to existing Section 232 tariffs, are exempt from the new duty. The Canadian government has argued throughout the process — including at a July hearing before the U.S. Trade Representative — that Canada's forced-labour import ban and Bill C-35 already remove any legal basis for the tariff, a position the U.S. Trade Representative did not accept in its final order.

As reported by CNBC, the tariffs were challenged in court within hours of taking effect, and trade researchers at the Peterson Institute for International Economics have said publicly that the Section 301 forced-labour justification is unlikely to survive a sustained legal challenge, given how the measure is structured.

Analysis: Why This Matters

Based on our analysis of the sequence of events since February, this is now the second time in five months that a major U.S. tariff program aimed at Canada has been built, struck down by a court, and rebuilt on different legal grounds. That pattern matters more than the specific 10% figure: it suggests Canadian exporters should plan for continued legal and procedural uncertainty in U.S. trade policy rather than assuming any single tariff action is durable.

Historical Context:

The CUSMA carve-out embedded in this order is consistent with how the agreement has functioned throughout the various 2025-2026 tariff actions — CUSMA-compliant trade has been repeatedly shielded even as non-CUSMA-preference goods have been targeted by successive measures. This reinforces that the practical dividing line for Canadian businesses, across nearly every tariff round this year, has been CUSMA documentation rather than country of origin alone.

What Happens Next:

Expect litigation over the Section 301 order to proceed over the coming months, following the pattern set by the IEEPA challenge, which took roughly a year from initial legal action to a Supreme Court ruling. In the meantime, expect the duty to remain collectible, meaning exporters cannot simply wait out the legal process without exposure. Watch for Global Affairs Canada to continue pursuing a negotiated resolution alongside the litigation, consistent with Minister LeBlanc's stated approach on prior tariff rounds.

Your Action Plan

Immediate (This Week):

Confirm CUSMA compliance status for every product line shipped to the U.S. since July 24, 2026.
Contact your customs broker to verify CUSMA certificates of origin are being filed correctly.
Calculate your actual dollar exposure for any non-CUSMA-compliant shipments.

Short-term (This Month):

Get a written quote on re-sourcing any input causing a CUSMA compliance failure.
Retain all customs entries and duty payment records from July 24 onward in case a refund mechanism follows any future court ruling.
Check whether your industry association has filed or plans to file comments in the Section 301 process.

Long-term (This Year):

Build a standing CUSMA compliance review into your supply chain planning, rather than treating it as a one-time check.
Diversify supplier contracts away from single-source, non-CUSMA inputs where the cost premium is smaller than the recurring duty exposure.

Other Perspectives

The Canadian Government:

Minister Dominic LeBlanc has stated that Canada has among the strongest forced-labour import enforcement provisions of any country named in the U.S. action, and that Ottawa will continue engaging with Washington while noting there is no legal basis for the tariff, according to Global Affairs Canada's July 23, 2026 statement.

The U.S. Administration:

The U.S. Trade Representative's office has maintained that Canada and the other 59 named economies have forced-labour import bans on the books that are not being enforced with sufficient rigour, and that the Section 301 authority remains available regardless of the IEEPA ruling, according to reporting from NPR and Fortune.

Trade Policy Researchers:

Analysts at the Peterson Institute for International Economics have said publicly that the forced-labour justification for the new tariffs is unlikely to hold up if challenged in court, given the pattern established by the IEEPA decision, according to PIIE's published commentary.

Affected Exporters:

Trade counsel quoted by Troutman Pepper Locke have noted that businesses need to treat the CUSMA exemption as an active compliance requirement rather than an automatic shield, since duty exposure depends entirely on documented rules-of-origin compliance for each specific shipment.

Note: Including multiple perspectives doesn't imply all views are equally valid, but ensures readers can make informed judgments.

Corrections Policy

We strive for accuracy. If you find an error in this analysis, please email us at [email protected]. We will promptly investigate and correct any factual inaccuracies.

Updates:

No corrections to date (as of July 25, 2026).

Sources

NPR, reporting on the Section 301 replacement tariffs taking effect July 24, 2026
CNBC, reporting on the legal challenge filed against the new tariffs and expert commentary
Fortune, reporting on the scope of tariffs across 60 trading partners
Tech Times, reporting on the Section 301 action replacing the IEEPA and prior tariff regimes
Global Affairs Canada, Minister Dominic LeBlanc's July 23, 2026 statement on Section 301 tariffs
Peterson Institute for International Economics, published analysis on the legal durability of the new tariffs
Troutman Pepper Locke, legal analysis of Section 301 forced-labour tariff compliance requirements