BYD tariffs lawsuit challenges U.S. emergency tariff authority

On January 26, BYD Auto Co. filed a lawsuit at the U.S. Court of International Trade in New York (Case No. 26-00847) against the U.S. government, challenging President Donald Trump’s authority to impose tariffs and seeking refunds for all levies paid since April 2025, according to court filings. The BYD tariffs lawsuit places renewed focus on the legal limits of emergency-based trade measures.

Legal basis of the BYD tariffs lawsuit

In the complaint, four U.S. subsidiaries of BYD contest the use of the International Emergency Economic Powers Act to justify border taxes. They argue that the statute does not explicitly authorize tariffs, stating that the text of IEEPA does not include the word “tariff” or any equivalent term. This interpretation forms the core of the BYD tariffs lawsuit.

Challenge to emergency powers

The filing emphasizes that the tariffs were imposed without clear congressional approval, raising broader questions about executive authority in trade matters. BYD maintains that emergency powers were stretched beyond their intended scope, creating legal and commercial uncertainty for companies operating in the United States.

BYD’s U.S. operations and refund claim

BYD said it filed a separate and independent action to safeguard its right to recover duties already paid. Although the company does not sell passenger vehicles in the U.S. market, its American operations span buses and commercial vehicles, batteries, energy storage systems, and solar panels. BYD North America employs around 750 workers at a truck manufacturing facility in Lancaster, California. Separately, the U.S. Supreme Court is expected to rule on the broader legality of the tariffs. In the first week of February, U.S. Trade Representative Jamieson Greer said the court was proceeding cautiously because of the “enormous” economic and legal stakes involved, underscoring the wider implications of the BYD tariffs lawsuit for U.S. trade policy and global manufacturers.