This article analyzes the Customs Tax System of Peru, starting with a brief review of the legal basis that governs domestic regulations, afterwards appointing and defining each of the Customs Taxes paid in foreign trade, commenting the key aspects of the Trade Integration Agreements signed between Peru and Mexico, such as their background, tariff benefits and the current commercial flow of goods (statistics) from the Peru-Mexico Trade Integration Agreement and from the Pacific Alliance Agreement involving Peru, Mexico, Colombia and Chile. In addition, this article comments about cases solved by the Tax Peruvian Tax Court regarding the application of the Free Trade Agreement (FTA) between Peru and Mexico to end with the corresponding conclus...