Cost Pressures Intensify as Heavy-Duty Levies Start Oct. 1
The Trump administration’s imposition of a 25 percent tariff on imported heavy trucks and related components is set to introduce another wave of cost pressures on fleets already battling soft freight demand and tight margins, industry stakeholders warn.
“Adding cost to trucks now is exactly what we can’t absorb,” said Werner Enterprises CEO Derek Leathers during the WEX OTR Summit in San Antonio on October 2. Werner ranks among North America’s largest for-hire carriers.
As of press time, many key details such as the precise scope of taxed models and the mechanism for collecting these duties remain opaque, and truck manufacturers have refrained from full public commentary.
“We’re eager to see the implementation guidelines and scope,” a spokesperson for Volvo Group North America told Transport Topics.
“We await clarity on how the medium, and heavy-duty Section 232 tariffs will be applied,” Paccar added in its public statements.
International Motors also noted it was “waiting for the executive order’s language” to assess impacts.
Trump Frames Tariffs as National Security Measures
President Trump has defended the tariffs under Section 232 of the Trade Expansion Act of 1962, which allows import duties on goods deemed a threat to national security. He argues that foreign imports undermine U.S. heavy truck manufacturing.
“In order to protect our Great Heavy Truck Manufacturers from unfair outside competition, I will be imposing, as of October 1st, 2025, a 25% Tariff on all ‘Heavy (Big!) Trucks’ made in other parts of the World,” Trump posted on Truth Social on September 25. He named names: Peterbilt, Kenworth, Freightliner, Mack, and asserted the tariffs would help preserve the financial health and strategic resilience of the U.S. trucking sector.
The Commerce Department earlier this year launched a Section 232 investigation into imports of medium- and heavy-duty trucks and components to assess their impact on national security.
Even so, as of early October, many questions remain: Which weight classes qualify as “heavy”? Which parts are included? And how will exemptions or carve-outs be handled?
USMCA and Cross-Border Production Remain Key Unknowns
A major concern for OEMs is whether the U.S.–Mexico–Canada Agreement (USMCA) will shield trucks and parts produced in Mexico or Canada from the new tariffs. Several major truck makers maintain facilities in both countries, raising the stakes for trade rules interpretation.
So far, the White House and Commerce have offered little guidance on whether the new tariffs will supersede or adhere to USMCA’s rules of origin. Analysts suggest the administration may apply the levies broadly, regardless of trade-agreement compliance.
One industry observer noted that these tariffs may serve to offset previous distortions introduced by steel and aluminum tariffs. Earlier in 2025, the administration doubled duties on metals, which pushed up input costs for U.S. OEMs.
Jeffrey Kauffman of Vertical Research Partners told Daly Asset Management that the new truck tariff could “level what had become an imbalanced competitive field.” He explained that some foreign OEMs had used Mexico-based assembly to skirt metal tariffs but still benefit from exporting into the U.S. market.
Truck production in Mexico is significant: for example, Freightliner Cascadias are built in the Saltillo facility.
FTR Transportation Intelligence analysts estimate that, before this new tariff, the cost of building a Class 8 truck had already climbed 9–12 percent because of metal and input duties earlier in the year.
OEMs and Carriers Debate Tariffs on Vehicles vs. Components
In filings to Commerce, Paccar Inc. (maker of Kenworth and Peterbilt) expressed caution toward sweeping tariffs on parts, while endorsing higher import duties on fully built trucks made abroad. Paccar argued that the U.S. lacks sufficient domestic capacity to supply critical components transmissions, brake systems, axles, sensors, trim modules, and more at scale. It also emphasized that the company already assembles most of its finished heavy trucks in the U.S.
“We support President Trump’s objective of bringing medium- and heavy-duty truck manufacturing home,” Paccar wrote. “We look forward to crafting a tariff structure for parts that encourages more domestic sourcing while preserving efficient production of finished vehicles in the U.S.”
Ford active in the Class 2–7 commercial truck space has echoed this dual concern. CEO Jim Farley has pointed out that while Ford produces many trucks domestically, it still relies on imported parts. He warned that tariffs ranging from 25 to 70 percent on non-U.S. parts could represent a multibillion dollar headwind for future investments.
Other OEMs and logistics firms have weighed in too. International Motors warned that import restrictions could “trigger supply chain disruptions, slow delivery times, increase costs, and complicate operations for U.S. businesses.”
Carrier voices have questioned the national security rationale behind the tariffs. For example, Hirschbach Motor Lines (a mid-sized for-hire carrier) argued the import of trucks and parts does not threaten U.S. security, but tariff-driven cost increases will harm customers and communities.
What Could Be Next: Market Reactions, Adjustments, and Fallout
Paccar and Volvo Group both saw share price gains after the tariff announcement, as markets bet that domestic assembly firms would benefit from reduced competition. Meanwhile, OEMs with heavier Mexico exposure such as Traton (International Motors) and Daimler faced downward pressure in their stock valuations.
The new tariffs may prompt OEMs to reexamine their supply chains. AutomotiveManufacturingSolutions reports that manufacturers are already recalculating plant footprints and sourcing strategies to mitigate impact. If the tariffs override USMCA protections, some Mexico-based operations might be moved or scaled back.
For trucking fleets, the ripple effects could include longer replacement cycles (holding onto older units longer), passing cost increases to shippers, or delaying capital expenditures in favor of maintenance. Fleets may also renegotiate contracts to account for tariff risk.
There is speculation that the administration may offer relief or exemptions to OEMs with final assembly in the U.S., or extend tax incentives as offsets. Reuters recently reported that Trump is considering significant tariff relief for U.S. vehicle producers potentially eliminating tariffs for those with domestic production.
Even with protection for completed trucks, tariffs on components could still squeeze margins severely. Suppliers who cannot adapt may face consolidation, reshoring pressures, or exit. Cost pressures could also slow adoption of new technologies (e.g. EV or zero-emission trucks) if capital is constrained.
The 25 percent tariff on imported heavy trucks is a bold move that could reshape U.S. trucking and manufacturing landscapes. While intended to fortify domestic OEMs, it brings significant uncertainty for carriers, component suppliers, and fleets. Whether the tariffs deliver long-term industrial gains or create new bottlenecks and inflation headwinds depends heavily on how the administration implements exemptions, interprets trade agreements like USMCA, and addresses component sourcing challenges.
