- Lead. The United States, Mexico, and Canada formally opened the first joint review of the USMCA on 1 July 2026 — a mechanism written into the agreement’s text that requires the three governments to decide, by today’s deadline, whether to extend the pact for another 16 years, accept a revised version, or begin a ten-year sunset countdown ending in 2036.
- Fact. The trilateral review covers an estimated $1.6 to $2 trillion in annual goods and services trade and comes as Mexico faces a trade-weighted average tariff of 9.8% — up from 0.1% at the start of 2026 — and Canada faces 5.2%, the product of successive US tariff actions that the USMCA was never designed to accommodate.
- Stake. North American supply chains support more than 17 million jobs across the three countries, and Mexican exports already carry roughly 40% US-origin content, meaning US tariffs on Mexican goods effectively tax American manufacturing inputs — a fact that trade economists say complicates the Trump administration’s stated objectives.
What happens at the review
The USMCA’s joint-review provision, embedded in the agreement when it replaced NAFTA in 2020, requires the three trade ministers — operating as the Free Trade Commission — to convene every six years to formally assess the pact’s performance and agree on its future. By 1 July 2026, they must jointly confirm one of three paths: a clean 16-year extension to 2042, a modified extension incorporating negotiated revisions, or a decision not to extend, which triggers an annual review cycle and sets the agreement to expire on 1 July 2036 if no consensus is reached before that date. The Brookings Institution’s analysis of the review process notes that the US formally initiated proceedings in September 2025 with a Federal Register notice and a public hearing in November, with Mexico and Canada following suit shortly after.
Formal bilateral negotiating rounds between the US and Mexico have been underway since late May, covering automotive rules of origin, steel and aluminium trade, and economic security provisions. Canada’s engagement has moved more slowly: the US-Canada dynamic has been strained throughout 2026 by tariff disputes, and the two governments have held fewer structured preparatory talks than the US-Mexico track. Whether Canada will formally join a three-way agreement or whether the review ends with a bilateral US-Mexico framework and a separate arrangement with Ottawa remains unresolved.
The tariff paradox at the centre of the review
The review’s fundamental tension is that the US has imposed historically high tariffs on its two USMCA partners through executive action — measures that US courts have successively challenged but that remain operationally in place during litigation. Mexico, which had a near-zero tariff exposure to the US at the start of 2026, now faces a weighted average of 9.8%; Canada, similarly, has moved from 0.1% to 5.2%. Those rates operate alongside, not instead of, the USMCA’s zero-tariff schedule on qualifying goods — a contradiction that exporters navigate by adjusting certification strategies in real time.
The automotive sector carries the highest operational risk. USMCA’s rules-of-origin requirements already mandate that a qualifying vehicle contain 75% North American content to receive preferential tariff treatment; renegotiating those thresholds — in either direction — would ripple through supply chains that took years to restructure after the original NAFTA-to-USMCA transition. Labour enforcement provisions under USMCA’s rapid response mechanism have also produced periodic flash-points between Washington and Mexico City over union rights at specific facilities.
What the outcome signals
A clean extension — the path of least disruption — would push the next review date to 2032 and remove the formal expiry risk from business planning horizons. A failure to extend, even with the USMCA remaining technically in force until 2036, would immediately raise the cost of capital for cross-border investment projects and hand leverage to whoever governs Washington in the 2028-2036 window. Trade economists broadly regard the annual-review sunset path as the least stable outcome for long-run integration, regardless of which party’s tariff preferences ultimately prevail.