U.S. Still Needs Canadian Aluminum Despite Trump Tariffs, Alcoa Says—And It’s Paying More Than $1 Billion in Duties

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The tariff wall around the U.S. aluminum market is high, but the supply arithmetic is proving harder to change. Alcoa says it is paying more than $1 billion in duties to move most of its roughly 900,000 tonnes of annual Canadian aluminum production into the United States. Yet American manufacturers still need the metal.

That contradiction is becoming one of the clearest examples of the limits of tariffs in a tightly integrated North American supply chain. The United States needs millions of tonnes of imported aluminum every year, while domestic smelters cannot quickly produce enough to replace Canadian supply. At the same time, tariffs and scarcity have pushed the U.S. Midwest aluminum premium to extraordinary levels. For Alcoa, that has created an unusual outcome: a huge tariff bill that the company says is being offset by higher regional pricing.

Alcoa’s Tariff Bill Has Climbed Above $1 Billion

Alcoa Chief Financial Officer Molly Beerman put an unusually concrete number on the trade dispute during the Jefferies Global Industrials Conference on September 10. The Pittsburgh-based aluminum producer makes roughly 900,000 tonnes of aluminum annually in Canada, with most of that production entering the U.S. market. Beerman said the company is now paying more than $1 billion in tariffs on those shipments. The figure illustrates just how large the financial consequences become when a 50% tariff is applied to a commodity moving across the border in industrial quantities.

The surprising part is that Alcoa is not describing that billion-dollar payment as a billion-dollar reduction in earnings. Beerman said the U.S. Midwest premium—the regional surcharge buyers pay on top of the global aluminum benchmark—is fully compensating the company for the tariff and also providing additional margin because metal remains scarce. In other words, tariffs have made importing Canadian aluminum extraordinarily expensive, but the American market is tight enough that customers are still paying prices that keep the trade commercially viable.

The U.S. Cannot Replace Canadian Aluminum With Domestic Metal Overnight

The problem begins with scale. According to Beerman, the United States needs to import roughly 4 million tonnes of aluminum annually, while Canada can supply approximately 3 million tonnes of that requirement. Even if every available Canadian tonne moved south, the U.S. would still need around 1 million tonnes from other countries. That makes the discussion fundamentally different from a market where imports can simply be displaced by abundant domestic production.

U.S. Geological Survey figures reinforce the point. American primary aluminum production was estimated at only 660,000 tonnes in 2025, with domestic smelter capacity of approximately 1.31 million tonnes a year. Canada, by comparison, produced about 3.3 million tonnes of primary aluminum. The USGS also identified Canada as the source of 56% of U.S. aluminum imports in its 2021-2024 source-country breakdown. Recycling supplies millions of additional tonnes to American industry, but recycled material and newly smelted primary aluminum are not interchangeable in every application. For many manufacturers, imported primary metal therefore remains an essential part of the supply equation.

The Midwest Premium Shows Where the Tariff Cost Is Appearing

Aluminum buyers in the United States generally do not pay only the London Metal Exchange benchmark price. Physical metal is commonly priced using that benchmark plus a regional premium reflecting transportation, availability, duties and other market conditions. In the U.S., the key reference is the Midwest premium—and it has become exceptionally expensive. As of Alcoa’s September 10 comments, the premium stood at about $1.09 per pound, equivalent to roughly $2,403 per metric tonne.

That was below the record $1.19 per pound reached in June, but it remained far above historical pre-tariff levels. Expectations that Washington could eventually reduce the tariff on Canadian material have helped pull the premium modestly lower. Alcoa, however, does not expect Canadian tariff relief alone to return pricing to normal. Its reasoning is straightforward: even with unrestricted Canadian supply, the U.S. would still require around another million tonnes of imports. Foreign sellers need enough of a price incentive to absorb the cost and risk of supplying the American market. As long as that shortage persists, the regional premium has considerable support.

Alcoa Is in an Unusual Position: The Tariff Can Hurt and Help at the Same Time

A company paying more than $1 billion in import duties would normally appear to be one of the clearest corporate losers from a tariff. Alcoa’s situation is more complicated because it owns production on both sides of the North American supply relationship and sells into a market where shortages have raised regional prices. Beerman described the company as being in a particularly favourable position under several possible trade-policy outcomes.

Under the present system, Alcoa pays the tariff but says the Midwest premium compensates for it. If Washington cuts the Canadian tariff, the company’s direct duty expense would fall sharply. If tariffs remain high and supply stays tight, regional premiums can continue supporting margins. That does not mean tariffs are costless to the wider economy. Historical U.S. International Trade Commission research found that American importers bore nearly the full cost of the Section 232 tariffs it studied between 2018 and 2021. Alcoa’s experience instead demonstrates how commodity pricing can redistribute that cost through a supply chain rather than leaving it entirely with the producer writing the tariff cheque.

Restarting U.S. Smelters Is a Much Slower Process Than Raising a Tariff

The Trump administration has argued that metal tariffs can encourage more production inside the United States, and there is historical evidence that tariffs can modestly increase domestic output. The difficulty is timing. Primary aluminum smelting is enormously capital- and electricity-intensive. In 2025, the USGS counted six operating primary smelters in five U.S. states, but only two ran at full capacity throughout the year. Two other smelters had been temporarily shut since 2022 and 2024.

Higher prices are encouraging efforts to revive capacity. Reuters reported in July that the New Madrid, Missouri, smelter was targeting the restart of a 75,000-tonne-per-year potline. Larger greenfield projects require much longer. In August, Reuters noted that a proposed new Oklahoma smelter intended to strengthen U.S. supply would not begin full metal production for at least several years. Even successful projects therefore cannot instantly bridge a gap measured in millions of tonnes. A tariff can change a border price overnight; constructing smelting capacity, arranging long-term power and commissioning equipment cannot happen on the same timetable.

Quebec Has Become a Strategic Part of America’s Aluminum Supply Chain

Much of Alcoa’s Canadian footprint is concentrated in Quebec, where the company operates the Baie-Comeau, Deschambault and Bécancour smelters. Current industry figures put their annual production capacities at approximately 312,000 tonnes, 287,000 tonnes and 462,000 tonnes respectively. Bécancour is 74.95% owned by Alcoa, with Rio Tinto holding the remainder. Collectively, the three facilities have physical production capacity exceeding one million tonnes a year.

Those plants are not easily replicated elsewhere. Alcoa has previously noted that its Canadian smelters are powered by renewable hydroelectricity, an important advantage in an industry where electricity is one of the largest operating inputs. The Aluminum Association of Canada says Alcoa’s Quebec operations support nearly 2,500 direct jobs and rely on more than 1,200 local suppliers. For communities such as Baie-Comeau and Bécancour, aluminum is therefore far more than a trade statistic. At the continental level, the same facilities function as part of an industrial network supplying American rolling mills, foundries, transportation manufacturers and packaging companies.

Global Supply Disruptions Have Made Canadian Metal Even Harder to Replace

The tariff dispute is unfolding during an unusually tight period for the global aluminum market. Supply disruptions in the Middle East have removed or constrained significant smelting capacity, intensifying competition for available metal in both Europe and North America. Earlier in 2026, Reuters reported that the Middle East represented roughly 9% of global aluminum capacity before conflict-related disruptions began reshaping trade flows.

Alcoa is seeing the effect directly. Beerman said North American and European customers are actively searching for supply and that Alcoa’s value-added order book was almost completely sold out for the remainder of 2026. That matters for U.S. tariff policy because importers cannot simply shop around the world as though every tonne were waiting for an American buyer. European customers are competing for many of the same units, while disruptions have reduced output from suppliers that might otherwise fill the American shortfall. In that environment, nearby Canadian production becomes more—not less—strategically valuable. Geography, existing logistics and decades-old commercial relationships provide advantages that a tariff does not erase.

Cutting Canada’s Tariff to 25% Would Help, but Alcoa Says It Would Not Solve the Price Problem

Reducing the aluminum tariff on Canada from 50% to 25% has been discussed during U.S.-Canada negotiations, although no such broad reduction was in effect when Beerman made her September 10 comments. From Alcoa’s perspective, a lower Canadian rate would have an obvious benefit. Beerman said investors could effectively think about the company’s tariff burden being cut substantially if the Canadian rate were halved.

The more interesting question is what would happen to American aluminum prices. Alcoa argues that the Midwest premium might decline somewhat but would probably remain elevated because the U.S. would still need about one million tonnes from suppliers outside Canada. Beerman suggested a more substantial normalization could require tariff relief or waivers for additional sources such as Japan, South Korea or Europe. If enough foreign supply became economically attractive, competition could push the premium lower and erase part of the windfall that producers currently receive. That makes tariff negotiations a balancing act: reducing duties helps importers directly, but increasing supply can simultaneously reduce the regional premiums benefiting producers.

Automakers, Packaging Companies and Other Manufacturers Ultimately Care About the Delivered Price

The aluminum dispute matters well beyond smelters. USGS data show that transportation accounted for about 36% of U.S. aluminum consumption in 2025, making vehicles the largest end-use category. Packaging represented another 24%, building applications 13%, electrical uses 9%, and consumer durables and machinery about 8% each. The price of aluminum therefore works its way into an enormous range of products, from vehicle body panels and beverage cans to power equipment and construction materials.

Past U.S. tariff experience offers a useful warning, although it should not be treated as a forecast of the current 50% regime. Studying the earlier Section 232 measures from 2018 through 2021, the U.S. International Trade Commission estimated that affected aluminum imports fell roughly 31%, domestic aluminum production increased about 3.6%, and average U.S. aluminum prices rose around 1.6%. The commission also concluded that importers bore nearly the full tariff cost and found negative production effects among downstream industries using steel and aluminum. That history explains why manufacturers focus not simply on whether aluminum is made domestically, but on what a usable tonne ultimately costs at the factory gate.

The Bigger Issue Is Whether Tariffs Can Change an Integrated Market Faster Than Industry Can Adapt

Aluminum is now caught inside a much broader deterioration in U.S.-Canada trade relations. Canada introduced new counter-tariffs on September 8 after Washington imposed additional duties on Canadian products, with Ottawa raising tariffs on numerous U.S. steel and aluminum products to 50%. The United States has simultaneously expanded trade pressure into other Canadian sectors. The result is an increasingly complicated system in which both governments are trying to create leverage while companies continue operating supply chains built around decades of cross-border integration.

Alcoa’s comments expose the central difficulty. Washington can make Canadian aluminum more expensive, but American demand does not disappear when the tariff takes effect. Domestic smelters cannot immediately replace several million tonnes of imports, and competing global suppliers also require an economic incentive to redirect scarce metal toward the United States. For now, that adjustment is appearing in elevated regional premiums and unusually high delivered prices. The most revealing figure may therefore not be Alcoa’s billion-dollar tariff payment itself. It is the fact that, even after paying it, Canadian aluminum is still moving south because American industry continues to need the metal.

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