Lithium Americas Flags Tariff and Supply-Chain Cost Pressure at Thacker Pass as Nevada Lithium Build Advances

Lithium Americas’ Thacker Pass project has moved deeper into full-scale construction, but the strategic Nevada lithium development is now carrying a sharper cost-risk profile as tariffs, fuel escalation and global shipping disruption flow into the project’s 2026 capital program.

The company’s first-quarter update places the issue squarely inside the economics of one of North America’s most closely watched battery-minerals builds. Lithium Americas estimates potential tariff exposure for Phase 1 construction at US$80 million to US$120 million, with most of that impact expected during 2026. The original US$2.93 billion Phase 1 capital estimate did not include tariff exposure, fuel-price increases or broader inflationary effects linked to current geopolitical disruption.

The update does not point to a stalled project. As at 31 March 2026, Lithium Americas had capitalised US$1.3 billion in construction and project-related costs, including US$1.1 billion inside the Phase 1 capital estimate. The company retained 2026 capex guidance of US$1.3 billion to US$1.6 billion, while detailed engineering had passed 95% and procurement was more than 70% complete.

Thacker Pass is now in the heavy execution phase. More than 2.43 million workhours had been completed without a serious injury or lost-time incident by the end of March, with about 1,065 personnel on site and workforce numbers expected to rise above 2,000 in the second half of 2026. Major equipment and long-lead materials have been arriving at site or at the Winnemucca fabrication yard, including the 115kV main transformer, auxiliary boiler, bicarbonate reactors, filter presses, thickener steel, steam turbine generator and acid-plant components.

The supply-chain detail is commercially important. More than 75% of the structural steel for Thacker Pass, sourced from the United Arab Emirates, was either in transit or already at site or laydown areas. Lithium Americas and Bechtel have rerouted steel through the Port of Jeddah to reduce disruption linked to the Middle East conflict and the Strait of Hormuz.

Phase 1 of Thacker Pass is designed for 40,000 tonnes per year of battery-quality lithium carbonate, with mechanical completion targeted for late 2027. The project is owned through a joint venture between Lithium Americas, holding 62%, and General Motors Holdings LLC, holding 38%. Project financing includes a US$2.23 billion loan from the US Department of Energy and strategic investment from GM and Orion Resource Partners.

The operational significance lies in the tension between national supply-chain policy and construction-market reality. Thacker Pass is being advanced as a domestic battery-materials project for the US electric-vehicle supply chain, yet its build is still exposed to global steel, shipping, fuel and equipment markets. The next capital estimate, targeted for the second half of 2026, will be closely watched because it will convert those pressures from risk range into a more defined project-cost view.