GlossaryEN1 min readUpdated: Jun 26, 2026
Mercosur
Mercosur (Mercado Común del Sur) is South America's primary customs union, established in 1991 by Argentina, Brazil, Paraguay, and Uruguay — Venezuela has been suspended since 2017.
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Source: https://www.mercosur.int
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Mercosur (Mercado Común del Sur) is South America's primary customs union, established in 1991 by Argentina, Brazil, Paraguay, and Uruguay — Venezuela has been suspended since 2017. Member states trade goods duty-free under harmonized customs rules, while imports from outside the bloc face a Common External Tariff (AEC). For freight forwarders and customs brokers, the AEC directly affects landed costs on third-country shipments, and mutual recognition of certificates shapes compliance procedures across borders. Ongoing trade negotiations — notably the long-running Mercosur–EU agreement — mean that tariff schedules and market access conditions can shift, requiring importers and exporters to monitor developments closely. Unlike a simple free trade area, a customs union also coordinates external trade policy, making Mercosur a collective negotiating force for the entire region.
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