How Canadian Small Businesses Can Prepare for Sudden U.S. Tariffs
For a Canadian company that sells into the United States, a tariff can change the economics of a shipment almost overnight. The charge is collected at the U.S. border, usually from the importer of record, but the cost can move through the supply chain in several ways: higher prices, lower margins, renegotiated contracts, delayed orders, or a shift to another supplier.
The immediate question is not simply whether a tariff exists. It is which products are covered, when the duty applies, and whether an exemption or trade-agreement preference is available.
Start with the product code, not the headline rate
Tariffs generally apply according to a product’s classification under the Harmonized Tariff Schedule. A broad political announcement may cover only specific goods, materials, or tariff lines. The same company can therefore face different treatment across several products.
Exporters should confirm:
- the correct HS or HTS classification;
- the country-of-origin rules;
- whether the good qualifies for preferential treatment under CUSMA;
- the effective time for goods entering the United States; and
- whether other duties, including sector-specific measures, apply as well.
The U.S. White House has stated that an additional 50% duty on certain Canadian products is scheduled to apply to covered goods entered for consumption from 12:01 a.m. Eastern time on August 19, 2026. The precise product list and any exceptions matter more than the headline percentage.
Map who carries the cost
A Canadian seller may pay indirectly even when a U.S. buyer handles customs. Review contracts for duty, tax, delivery, and price-adjustment clauses. Incoterms can determine which party arranges transport and customs clearance, but they do not automatically settle every dispute over a newly imposed duty.
Businesses should model at least three cases:
| Scenario | Main pressure point |
|---|---|
| Buyer absorbs the duty | Lower demand or delayed orders |
| Seller absorbs the duty | Reduced gross margin |
| Cost is shared or passed through | Price negotiations and customer retention |
Cash flow deserves separate attention. A tariff may be payable before the exporter receives payment, while inventory purchased at an old price may become harder to sell after the duty takes effect.
Build a plan that works even if talks continue
Negotiations can remove, delay, or change a tariff, but a company should not base its operating plan on an unconfirmed outcome. The practical response is to prepare customs documentation, ask brokers for written classification advice, identify substitute suppliers or markets, and separate tariff-sensitive products from the rest of the business.
Statistics Canada reports that the United States remained Canada’s dominant goods market in 2025, even as the share of exports going there declined. That dependence makes diversification useful, but it cannot replace the U.S. market quickly for every firm.
A small business should keep records showing product origin, input costs, customer terms, and tariff calculations. Those records help with negotiations, customs questions, financing requests, and any later request for remission or relief. Canada’s finance department and the Canada Border Services Agency publish the applicable rules and procedures, while final U.S. entry treatment is determined by U.S. customs authorities.
Sources
- Imposing Additional Duties to Offset Canadian Discrimination Against the Commerce of the United States with Respect to Dairy
- Customs Tariff 2026
- Canada’s engagement with the United States
- Canadian international merchandise trade, December 2025
- Duty, Taxes and other Fees required to import goods into the United States