Unlike the H-1B work visa, TN NAFTA visas are not subject to a cap. H-1B visas are capped to allow only 65,000 general and 20,000 Master’s visas in the annual lottery. Employers can sponsor professional workers from Canada and Mexico to enter the U.S. under a TN visa for designated professional-level jobs that require a bachelor’s degree, professional license or appropriate credentials without worrying about whether or not H category cap has been reached.