This bill introduces a new Cargo Circumvention Tax by amending the Internal Revenue Code of 1986. The tax specifically targets "United States-bound circumvented cargo," defined as goods discharged from an ocean-going vessel in Canada or Mexico and subsequently entering the United States via rail, highway, airport, or inland port. The tax amount is set at 0.125 percent of the cargo's value , as determined by U.S. customs laws, and is to be paid by the importer at the time of entry into the United States. This includes cargo that is intact, intermodal, or has been modified, assembled, or consolidated in Canada or Mexico before entering the U.S. The Secretary of the Treasury is authorized to issue regulations for the collection of this tax and to establish penalties for non-compliance, with the provisions applying to cargo entering the U.S. after December 31, 2025.