Prior to the North American Free Trade Agreement (NAFTA), the international tax provisions of the Mexican tax system were in harmony with the then protectionist environment of Mexican trade. The system was characterized by high withholding taxes on the repatriation of profits (i.e., payments from Mexico to parties abroad), frequently at 21 to 35 percent, and high duties on the importation of goods. It was not abnormal to find duties of 100% ad valorem.
Harmonizing The Mexican Tax System With the Goals of the North American Free Trade Agreement (NAFTA),
San Diego L. Rev.
Available at: https://digital.sandiego.edu/sdlr/vol35/iss3/5