Trump’s Effective Tariff Rate on Canadian Goods Climbs to 4.2% as Duty-Free Trade Share Shrinks: RBC

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Canada’s trade relationship with the United States is becoming more expensive, even as most Canadian exports continue crossing the border without tariffs. New figures analyzed by RBC Economics show that the effective U.S. tariff rate on Canadian goods climbed to 4.2% in September 2026, up from 3.2% in August, while the share entering duty-free slipped to approximately 82%.

The increase reflects another escalation in President Donald Trump’s trade measures, particularly new 50% tariffs affecting selected Canadian products. Although Canada’s overall merchandise trade surplus improved during September, weaker export volumes and declining shipments in tariff-exposed industries reveal growing pressure beneath the headline numbers.

For Canadian manufacturers, exporters, and workers, the concern extends beyond the latest tariff rate. The gradual erosion of duty-free access threatens an economic relationship built around decades of closely integrated cross-border trade.

The Effective Tariff Rate Rose Sharply in Just One Month

The latest figures from RBC Economics highlight how quickly Canada’s tariff exposure is changing. The average effective U.S. tariff rate on Canadian imports increased from 3.2% in August to 4.2% in September, representing a full percentage-point increase in just one month. That puts Canada above Mexico, which RBC estimated faced an effective rate of 3.2%, although Canadian goods remained below the overall U.S. import average of 6.5%. The increase is particularly significant because Canada’s trade relationship with the United States has traditionally benefited from preferential treatment under North American free-trade arrangements.

An effective tariff rate measures the average duty burden across imported goods rather than the rate applied to every individual product. Some Canadian shipments continue entering without tariffs, while others face substantially higher charges depending on their classification and applicable trade measures. Consequently, a seemingly modest average of 4.2% can conceal severe challenges within particular industries. For a Canadian manufacturer exporting specialized components or consumer products, the difference between duty-free access and a 50% tariff can determine whether an American customer remains commercially viable. RBC’s figures therefore capture both Canada’s remaining trade advantages and their increasing vulnerability.

Canada’s Duty-Free Trade Advantage Is Gradually Eroding

Perhaps the most concerning development is the declining proportion of Canadian goods entering the United States without tariffs. According to RBC Economics, approximately 85.7% of Canadian exports crossed the border duty-free in July 2026. That share declined to 84.6% in August before falling to around 82% in September. Although the overwhelming majority of shipments by value still benefit from tariff exemptions, the direction of the trend suggests that protections previously taken for granted are becoming less comprehensive. Each reduction represents another portion of bilateral commerce exposed to additional costs or changing trade restrictions.

The Canada-United States-Mexico Agreement, known as CUSMA in Canada and USMCA in the United States, remains essential to preserving relatively open trade. Goods that satisfy its rules of origin generally qualify for preferential treatment, although certain American tariff measures can override those protections. That distinction has become increasingly important for Canadian businesses negotiating contracts with American customers. A company might qualify for duty-free treatment on one product while facing substantial tariffs on another, even when both originate from the same Canadian facility. The broader concern is not simply the current cost of crossing the border, but whether exporters can confidently predict which products will retain favourable access.

Trump’s 50% Tariffs Are Creating Serious Problems for Targeted Industries

The sharpest consequences are concentrated in industries exposed to the Trump administration’s new Section 338 tariffs, which took effect on August 22, 2026. These measures impose 50% duties on selected Canadian products, affecting approximately 5% of Canadian exports to the United States. RBC identified plastics, electrical machinery, furniture, and wood products among the sectors facing particularly significant exposure. The regional impact is concentrated in manufacturing and resource-producing areas, including Ontario, Quebec, and British Columbia, where businesses rely on established American customers and closely connected supply chains.

The effects were already visible in September’s trade figures. RBC estimated that Canadian exports of products covered by the new tariffs declined 28% compared with September 2025, after recording a 40% year-over-year increase in August. The dramatic reversal partly reflected unusually strong shipments before the tariffs took effect, making it difficult to attribute the entire decline to the new duties. Nevertheless, the figures illustrate the vulnerability of companies facing sudden changes in market access. A manufacturer that previously competed on price and reliability may struggle to maintain orders when an American customer faces dramatically higher import costs.

Why RBC’s 4.2% Figure Differs From Other Tariff Estimates

Canada’s trade situation becomes more complicated when different economic institutions publish substantially different tariff estimates. While RBC reported a realized effective tariff rate of 4.2% for September, the Bank of Canada’s October 2026 Monetary Policy Report incorporated an estimated average U.S. tariff rate of 7.5% on Canadian goods. The Parliamentary Budget Officer separately estimated a trade-weighted rate of 7.7% under its assessment of recent trade measures. These figures are not necessarily contradictory because they use different methodologies, reference periods, and assumptions about the composition of trade.

RBC’s September figure reflects U.S. customs data on imports that actually entered the country, while the Bank of Canada’s projections weight tariff measures against historical trade patterns. That distinction matters because exceptionally high tariffs can discourage imports altogether. When an American buyer cancels an order instead of paying a 50% duty, the lost transaction no longer contributes to observed customs collections. Canada’s measured tariff rate may consequently remain below the rate implied by the government’s tariff schedule, even while exporters lose business. Understanding the difference helps explain why the economic damage associated with trade restrictions cannot be measured through customs revenue alone.

Canada’s Growing Trade Surplus Masks Weakness Beneath the Surface

Canada’s September trade figures initially appeared encouraging. Statistics Canada reported that the country’s merchandise trade surplus widened to approximately $5.4 billion, compared with $5.0 billion in August. Merchandise exports reached $78.6 billion, increasing 0.2%, while imports declined 0.3% to $73.2 billion. However, the improvement was driven largely by higher prices and stronger shipments of specific commodities rather than broad-based growth across Canadian industries. Energy exports increased 8.2%, while exports of metal and non-metallic mineral products rose 8.6%, supported by higher gold shipments.

Removing those stronger commodity categories reveals a considerably weaker picture. Statistics Canada reported that exports excluding energy and metal and non-metallic mineral products declined 5.6% in September. More importantly, total export volumes fell 4.0% after adjusting for price changes. Consumer goods exports dropped 7.1%, industrial machinery and equipment exports declined 9.0%, and forestry-related exports fell 9.8%. These declines were not necessarily caused exclusively by tariffs, but several affected product groups overlapped with industries targeted by new American trade restrictions. For Canadian businesses, the contrast is important: a larger national trade surplus does not automatically mean factories are receiving more orders or shipping greater quantities of goods.

Canadian Exporters Are Looking Beyond the United States for Growth

Growing trade uncertainty is encouraging Canadian businesses to explore opportunities beyond their traditional American customers. The Parliamentary Budget Officer reported that Canadian merchandise exports to non-U.S. destinations in August 2026 were 51% above their average monthly level in 2024, compared with a 10.5% increase in exports to the United States over the same benchmark. However, the latest monthly figures suggest diversification remains uneven. Statistics Canada reported that exports to countries outside the United States declined 1.1% in September, following a record high in July. Non-U.S. destinations accounted for 29.8% of Canadian merchandise exports, down slightly from 30.1% in August.

Expanding into international markets presents opportunities, but replacing American customers is rarely straightforward. Canadian manufacturers may need to establish new distribution networks, adapt products to different regulatory standards, or compete with established suppliers in unfamiliar markets. Commodity exporters can sometimes redirect shipments more easily than businesses producing specialized automotive components or industrial equipment designed for American customers. September’s figures also showed how heavily international export performance can depend on volatile commodities such as gold, coal, and oil. Diversification could strengthen Canada’s long-term economic resilience, but the benefits will vary significantly between industries and may take years to materialize fully.

The Economic Risks Extend to Canadian Jobs and Investment

Higher tariffs threaten more than export revenues. The Parliamentary Budget Officer’s October 2026 assessment estimated that the combined Canada-U.S. trade measures introduced since early 2025 could reduce Canada’s real GDP by 1.4% after five years compared with a scenario in which the trading relationship remained at its 2024 conditions. Under an assumption that current tariffs remain permanent, the PBO estimated employment could fall by as much as 185,000 jobs relative to that baseline, with the maximum impact occurring approximately six quarters after the tariff shock. These figures represent modeled economic risks, not job losses already recorded or consequences attributable solely to September’s 4.2% effective rate.

The pressure on employment can develop gradually as companies adjust production schedules and investment decisions. A manufacturer facing weaker American demand may initially reduce overtime, delay equipment purchases, or postpone hiring before considering permanent workforce reductions. Those decisions can affect local suppliers, transportation companies, and communities dependent on industrial employment. However, the PBO also acknowledged that Canadian businesses have demonstrated an ability to adapt through market diversification and changing supply arrangements. Actual economic outcomes will depend on the duration of trade restrictions, commodity prices, global demand, and businesses’ capacity to find alternative customers. The greatest concern is that prolonged uncertainty could discourage investment even in industries that have not yet experienced substantial tariff-related losses.

American Businesses and Consumers Are Also Bearing Tariff Costs

Although Trump’s tariff policies target imported goods, the financial consequences do not stop with Canadian exporters. American importers are responsible for paying customs duties when affected goods enter the United States, although the economic burden can ultimately be shared among importers, exporters, businesses, and consumers. Research from the Federal Reserve Bank of New York examining tariffs imposed during 2025 found that nearly 90% of their burden was reflected in higher U.S. import prices rather than lower prices charged by foreign suppliers. These findings help explain why tariffs can increase costs for American manufacturers that depend on imported Canadian components.

The impact on household prices can take longer to emerge. A separate New York Fed study estimated that approximately 26% of tariff increases passed through to U.S. consumer prices in its analysis, with some indirect effects taking nine to twelve months to move through supply chains. Those findings concern broader U.S. tariffs rather than specifically measuring Canada’s September 2026 experience. Canadian households face a different combination of risks, including weaker employment income, reduced business investment, and possible price increases associated with Canada’s retaliatory tariffs on American imports. The result is a trade dispute in which businesses and consumers on both sides of the border can experience financial pressure, even when the original tariff is imposed by only one government.

The Future of CUSMA Could Determine Whether Tariff Pressure Intensifies

The next major challenge involves the future of North America’s trade framework. During the July 1, 2026, joint review of CUSMA, the United States declined to extend the agreement in its existing form. However, that decision did not immediately terminate the arrangement. The agreement remains in force, with annual reviews required until the three countries agree to an extension or the current term expires in 2036, unless an earlier withdrawal occurs under its provisions. For Canadian exporters, preserving the existing duty-free exemptions remains especially important because they continue protecting the majority of merchandise trade from American tariffs.

Recent developments demonstrate that those protections can still face significant exceptions. On October 30, additional changes to the American Section 338 tariff lists took effect, removing certain products from the 50% duties while adding 100 additional tariff classifications. RBC estimated that these revisions did not materially change the overall share of Canadian exports targeted by the new measures, but individual businesses could experience considerably different outcomes. The September effective tariff rate of 4.2% therefore represents a snapshot rather than a settled long-term cost. With trade negotiations unresolved and product-specific restrictions continuing to change, the central question is whether Canada can preserve broad duty-free access while preventing increasingly severe disruptions in the industries most exposed to American trade policy.

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