On July 1, 2026, Canada, the United States and Mexico reach the sixth anniversary of the trade pact that replaced NAFTA — known as CUSMA in Canada, USMCA in the U.S., and T-MEC in Mexico. That date triggers the agreement’s first-ever mandatory “joint review,” a built-in checkpoint where all three governments must decide whether to extend the deal another 16 years, let it drift into annual reviews, or walk away. With a tariff war already reshaping continental trade, the review has become the most consequential moment in North American economics in a generation.

A Brief History: From NAFTA to CUSMA

NAFTA took effect on January 1, 1994, knitting the three economies into one of the world’s largest free-trade zones. After two decades it was politically exhausted — blamed in parts of the U.S. for manufacturing job losses and seen as outdated on digital trade and labor. Renegotiated under the first Trump administration, the successor agreement was signed in November 2018, amended in December 2019, and entered into force on July 1, 2020.

CUSMA kept NAFTA’s core promise of largely duty-free continental trade but tightened the rules: stricter automotive content requirements, a new labor-value standard for autos, stronger labour and environmental enforcement, and modern chapters on digital trade and intellectual property. Crucially, it added something NAFTA never had — a sunset and review clause (Article 34.7). The agreement is scheduled to terminate in 2036 unless all three parties confirm they wish to continue. The 2026 joint review is the first test of that clause, and the first of its kind in any U.S. free-trade agreement.

How Each Country Has Benefited Financially

Trade has expanded dramatically under the agreement. U.S. goods trade with its CUSMA partners exceeded US$1.5 trillion in 2022, with USMCA partners accounting for roughly a third of total U.S. goods exports. By 2023 Mexico had overtaken China to become the United States’ single largest trading partner — a structural shift the pact accelerated.

United States

The U.S. runs a services-trade surplus with its partners (about US$26 billion in 2022) and benefits from deeply integrated supply chains in autos, electronics and agriculture. Manufacturers gain low-cost, tariff-free inputs from Canada and Mexico, while U.S. farmers rely on the two countries as their top combined export market. The trade-offs the U.S. emphasizes are its persistent goods deficits, which the U.S. Trade Representative noted in its 2026 agenda have grown since the deal began — the deficit with Mexico hit a record US$196.9 billion in 2025.

Canada

Canada is the most trade-dependent of the three: two-way trade equals roughly two-thirds of its GDP, and about 20% of Canadian GDP takes the form of goods exported to the U.S., supporting an estimated 2.4 million jobs. The payoff of CUSMA in the current climate is concrete: even amid the 2025 tariff war, nearly 90% of Canadian exports stayed duty-free because they were CUSMA-compliant. The agreement is, in effect, Canada’s shield.

Mexico

Mexico has arguably gained the most. It is now the top U.S. trading partner, and as the tariff gap between members and non-members widened, Mexican exporters rushed to comply: the share of Mexican exports using CUSMA preferences jumped from 44.8% to 88.7% in 2025. Total Mexican exports reached US$664.8 billion that year, more than 80% bound for the U.S. “Nearshoring” — companies relocating production from Asia — has reinforced Mexico’s role as a manufacturing hub.

The Upside and the Downside — and Why

Upsides

•Tariff protection. CUSMA compliance has insulated the vast majority of cross-border trade from punitive tariffs, the single biggest reason Canadian and Mexican exporters have weathered 2025 better than non-members.

•Supply-chain integration. Parts cross borders multiple times before final assembly; common rules of origin let that happen efficiently, lowering costs for producers and consumers alike.

•Investment certainty (in theory). A long-term framework encourages capital commitments that short-term tariff threats discourage.

•Modernized rules. Digital-trade, labour and IP chapters address parts of the economy NAFTA ignored.

Downsides

•Carve-outs blunt the shield. Sectoral tariffs on steel, aluminum, autos, copper and softwood lumber sit outside CUSMA’s protection. Canadian steel exports fell about 30% in 2025, and Canada’s economy briefly contracted as export volumes plunged 7.5% in one quarter — the worst since 2009 outside the pandemic.

•The sunset clause breeds uncertainty. The very review mechanism meant to keep the deal current also injects doubt, dampening investment in both Canada and Mexico, as analysts warned it might.

•Asymmetric leverage. Because only ~1.4% of U.S. GDP is exported to Canada versus ~20% of Canadian GDP flowing south, the bargaining power is lopsided — a vulnerability for the smaller partners.

•Rising compliance costs. Stricter rules of origin and labour-value rules raise administrative and production costs, particularly in autos.

Continue, Change, or Eliminate?

The review has three legal paths: a 16-year extension to 2036; a transition to annual reviews (if the parties signal neither renewal nor withdrawal); or withdrawal, which requires six months’ notice. Importantly, July 1 is a trigger date, not a hard deadline — if nothing is agreed, CUSMA does not vanish; it remains in force under annual review through 2036.

The case for continuation: stability. The integrated North American economy cannot be unwound cheaply, and the agreement has demonstrably protected jobs and trade flows. A clean extension would restore the investment certainty that tariff brinkmanship has eroded.

The case for change: Washington wants more. U.S. negotiators are pressing for higher North American auto content, broader access to Canada’s supply-managed dairy market, and changes touching Canada’s Online Streaming Act and certain provincial liquor and procurement rules. Canada, for its part, wants relief from the sectoral tariffs it considers a violation of the deal. A renegotiation could resolve these irritants — or reopen old wounds.

The case for elimination: largely rhetorical, but real. President Trump has publicly mused that the U.S. could let CUSMA “expire,” and his team has signaled it does not want a straightforward renewal. Few analysts expect outright termination — the economic damage would be mutual and severe — but the threat is a live negotiating lever.

If It Isn’t Renewed: How Canada Loses — or Benefits

Non-renewal would not be an overnight cliff. The most likely “no deal” outcome is the annual-review track, keeping CUSMA technically alive while negotiations grind on. But the practical consequences for Canada cut both ways.

How Canada loses

•Erosion of the tariff shield. If CUSMA compliance no longer guarantees duty-free access, the ~90% of exports currently protected become exposed. Given Canada’s reliance on the U.S. market — still about 71% of exports in 2025 — the hit to GDP, manufacturing and jobs would be substantial.

•Investment chill. Prolonged uncertainty deters the capital spending Canada needs; nearly half of Canadian machinery-and-equipment investment depends on U.S. imports, so cross-border friction compounds quickly.

•Weak leverage. The structural asymmetry means Canada has less ability than the U.S. to absorb a breakdown.

How Canada could benefit

•Forced diversification. The Carney government is using the pressure to cut interprovincial trade barriers and court new markets in Europe and Asia — reducing long-term dependence on a single, unpredictable partner.

•A cleaner, updated deal. A renegotiation that trades modest dairy or digital concessions for durable, tariff-free access could leave Canada more secure than the tariff-riddled status quo of 2025–26.

•Domestic resilience. Even through the worst of the trade war, CUSMA protections and Bank of Canada rate cuts kept the economy more resilient than feared — evidence Canada can adapt.

On balance, an orderly renewal is clearly in Canada’s interest; the upside of non-renewal is mostly the long-run discipline of diversification, which carries real short-term costs. As of early June 2026, Ottawa has formally notified Washington and Mexico City that it wants the deal renewed — while pressing for sectoral tariff relief alongside it.

The Bottom Line

CUSMA has delivered measurable gains to all three economies — record trade volumes, deeper integration, and, for Canada and Mexico, a protective tariff wall that proved its worth in 2025. Yet its sunset clause has turned a stabilizing agreement into a recurring negotiation. For Canada especially, the July 2026 review is less about whether trade continues — it will — and more about on whose terms. The smart bet is a bumpy, prolonged renewal rather than a clean break or a true collapse. But in a relationship this asymmetric, “most likely” is not the same as “safe.”

Supporting Documentation

1.Congressional Research Service — USMCA Joint Review: Process and Role of Congress (R48787); Background and Selected Issues (R48964) — https://www.congress.gov/crs-product/R48787

2.Office of the U.S. Trade Representative — USMCA overview and trade/FDI data — https://ustr.gov/trade-agreements/free-trade-agreements/united-states-mexico-canada-agreement

3.Brookings Institution — “USMCA has strengthened economic integration in North America” (USMCA Forward 2026) — https://www.brookings.edu/articles/usmca-has-strengthened-economic-integration-in-north-america

4.RBC Economics — Canada’s trade deficit / 2025 economic review — https://www.rbc.com/en/economics/canadian-analysis/featured-analysis/insights/eight-charts-that-defined-canadas-economy-in-2025/

5.Statistics Canada — Canada’s Economy During Recent Canada-U.S. Trade Developments; GDP by industry — https://www150.statcan.gc.ca/n1/pub/11-631-x/11-631-x2025004-eng.htm

6.Mexico Business News — USMCA trade split & utilization figures, 2025–26 — https://mexicobusiness.news/trade-and-investment/news/mexico-us-trade-hits-us147-billion-china-canada-volumes-drop

7.CBC News — Canada notifies U.S. and Mexico it wants CUSMA renewed; 2026 review coverage — https://www.cbc.ca/news/world/cusma-usmca-canada-us-mexico-trade-agreement-9.7219102

8.Policy Magazine — “Canada Must be Ready for a Post-CUSMA Economy” — https://www.policymagazine.ca/canada-must-be-ready-for-a-post-cusma-economy/

9.Blakes — U.S.–Canada Tariffs: Timeline of Key Dates and Documents — https://www.blakes.com/insights/us-canada-tariffs-timeline-of-key-dates-and-documents/

10.MLT Aikins — CUSMA’s 2026 joint review explainer (Article 34.7) — https://www.mltaikins.com/insights/cusmas-joint-review-what-employers-need-to-know/

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