Steel tariff relief tied to US plant build — what it means for trailer costs

Will the new tariff-relief program lower trailer prices?

No — not in the near term. The Trump administration published a Federal Register notice April 23 offering Canadian and Mexican steel and aluminum producers relief from 50% tariffs, but only if they commit to building new production capacity inside the U.S. The relief applies exclusively to imports tied to those new domestic plants and is contingent on meeting construction timelines, hiring plans, and capital investment milestones. For trailer manufacturers ordering steel plate and aluminum extrusions today, the 50% duty remains in place until a qualifying mill completes its U.S. facility and begins shipping from that location.

The policy formalizes what the administration has signaled for weeks: tariff barriers will stay high unless foreign producers onshore. Steel and aluminum account for roughly 60–70% of a dry van's material cost and a higher share in reefer and flatbed construction. A 50% tariff on imported coil, plate, and extrusion stock translates directly into higher trailer MSRPs — OEMs have already passed most of the increase through to order pricing since the tariffs took effect earlier this year.

How the relief program works

Under the Commerce Department framework, a steel or aluminum producer operating in Canada or Mexico can apply for reduced tariffs — potentially cutting the 50% duty in half — by submitting a detailed plan to expand primary metals production in the United States. The notice specifies that relief is not automatic: it applies only to material imported from the applicant's existing Canadian or Mexican facilities and only after the company demonstrates progress on its U.S. capacity commitment.

Milestones include construction start dates, capital expenditure schedules, and domestic hiring targets. The program does not waive tariffs on existing cross-border shipments unless tied to a future U.S. plant that meets those benchmarks. For a trailer OEM sourcing aluminum extrusions from a Quebec mill, that means the 50% tariff stays until the mill opens a U.S. extrusion line and qualifies under the program.

The tariffs themselves — up to 50% on steel and aluminum from Canada and Mexico — were imposed earlier this year. Both governments argue the duties violate the United States-Mexico-Canada Agreement. The new relief mechanism does not resolve that dispute; it offers a unilateral path around the tariff for companies willing to relocate capacity.

What this means for trailer and component costs

Trailer manufacturers and component suppliers face a narrow set of options. They can absorb the tariff and accept compressed margins, pass the cost to fleets in higher MSRPs, or wait for a qualifying mill to complete a U.S. facility and begin shipping duty-reduced material. The third option carries a multi-year timeline — primary steel and aluminum plants require 18 to 36 months from groundbreaking to first production, and the Commerce notice makes clear that tariff relief is phased in as construction milestones are met, not granted upfront.

For small fleets and owner-operators ordering trailers in 2026, the immediate effect is higher acquisition cost. A dry van that listed at $52,000 before the tariffs now carries an MSRP closer to $58,000 to $60,000, depending on the OEM's steel sourcing mix. Reefer units, which use more aluminum in refrigeration components and structural members, have seen similar increases. Flatbeds with domestic steel content fare slightly better, but most trailer OEMs rely on a blend of U.S. and imported material — the tariff hits any component fabricated from Canadian or Mexican coil, plate, or extrusion.

The relief program does not change the calculus for trailers ordered and delivered in the next 12 months. It introduces a potential future cost reduction if a sufficient number of mills commit to U.S. capacity and meet the program's milestones. Until then, the 50% tariff remains the baseline for cross-border steel and aluminum.

Onshoring timeline and capacity constraints

Primary metals production is capital-intensive and slow to relocate. A modern aluminum extrusion plant capable of supplying trailer manufacturers requires a minimum investment of $200 million and 24 months of construction and commissioning. Steel plate mills are larger and slower — a greenfield facility can exceed $1 billion in capital cost and take three years to reach full output.

The Commerce notice does not specify how much new U.S. capacity must be built to qualify for relief, only that the relief is proportional to the capacity commitment. A mill that shifts 20% of its output to a new U.S. facility would receive tariff relief on 20% of its remaining cross-border shipments, not a blanket waiver. That structure limits the near-term benefit for trailer OEMs: even if a major supplier begins construction in 2026, the first duty-reduced material will not reach trailer assembly lines until late 2027 or 2028.

Domestic steel and aluminum producers have limited spare capacity. U.S. mills are already running at high utilization, and adding new lines takes time. The tariff relief program bets that foreign producers will choose to build in the U.S. rather than exit the market or shift to other export destinations. If few mills take the offer, the 50% tariff becomes the long-term baseline, and trailer costs remain elevated.

What fleets should do now

For fleets planning trailer purchases in the next 18 months, the tariff is a fixed cost. Waiting for relief to materialize means delaying replacement cycles and running older equipment longer. The alternative is to lock in orders now and accept the higher MSRP, betting that the tariff-inflated price is still lower than what a trailer will cost in 2027 if demand tightens and OEMs face further input-cost pressure.

Used trailer prices have not yet fully reflected the new-equipment cost increase. A three-year-old dry van that traded at $28,000 in early 2025 is now closer to $32,000, but the spread between new and used remains wider than historical norms. For small fleets and owner-operators, that gap creates a short-term opportunity to buy used equipment before the market reprices. Once new trailer MSRPs stabilize at the higher tariff-adjusted level, used values will follow.

The tariff relief program does not change the immediate cost structure. It offers a potential future path to lower input costs if mills commit to U.S. capacity and meet the Commerce Department's milestones. Until those plants are built and producing, the 50% tariff is the price of doing business with Canadian and Mexican steel and aluminum suppliers.