The Lombard Review

Tariffs on Canada and Mexico go live

USMCA content carve-outs

The container ship Maersk Hanoi at the Port of Koper, Slovenia
The container ship Maersk Hanoi at the Port of Koper, Slovenia Photo: Petar Milošević/Wikimedia Commons · CC BY-SA 4.0

Key dataTariffs effective 4 Mar; China 20%

Following weeks of temporary stays and diplomatic maneuvering, the 25 per cent blanket tariffs on imports from Canada and Mexico took full statutory effect, alongside an escalated 20 per cent duty on Chinese goods. While the United States-Mexico-Canada Agreement (USMCA) contains specific regional content carve-outs, the immediate operational reality at border crossings is one of logistical friction, disputed classifications, and surging clearance costs.

Beijing's central business district at sunset
Beijing's central business district at sunset Photo: Yang Liu/Wikimedia Commons · CC BY-SA 2.0

Cross-Border Supply Chain Disruption

North American manufacturing operates on deeply integrated, just-in-time delivery networks where automotive sub-assemblies and machinery parts traverse national borders multiple times before final assembly. Imposing a 25 per cent duty on intermediate inputs shatters this production architecture. Even goods that qualify for USMCA regional content exemptions face crippling paperwork delays and border audits as customs authorities struggle to verify origin documentation.

The Federal Reserve Bank of Boston building, beside South Station Tower
The Federal Reserve Bank of Boston building, beside South Station Tower Photo: 4300streetcar/Wikimedia Commons · CC BY 4.0

Immediate Working Capital Drag

For cross-border manufacturers, the tariffs require an immediate and massive expansion of working capital credit facilities to post customs surety bonds and pay import taxes upfront. Smaller suppliers operating on thin single-digit margins face acute cash-flow insolvency within ninety days unless OEMs absorb the levies. By dismantling the duty-free certainty of North American integrated manufacturing, these tariffs inflict an immediate cash-flow drain across industrial supply chains that will ultimately show up as lower output and higher vehicle prices.

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