The Central American Common Market (CACM) was established by the General Treaty of Central American Economic Integration, signed on December 13, 1960, by Guatemala, Honduras, El Salvador, and Nicaragua. Costa Rica joined the agreement in July 1962. The treaty represented the economic pillar of a broader regional integration effort that had emerged during the 1950s and early 1960s, aimed at fostering both political and economic cooperation among the five Central American nations.
In addition to setting out the framework for economic integration, the General Treaty created two key regional institutions: the Secretariat for Regional Economic Integration and the Central American Bank for Economic Integration. Political integration efforts were pursued separately through the Organization of Central American States, founded in 1951.
Integration Efforts in the 1950s and 1960s
The idea of political and economic unity in Central America dates back to the early nineteenth century, following independence from Spain in 1821. Although the Federation of Central American States survived for only fifteen years, the ideal of regional unity persisted and reemerged forcefully in the mid-twentieth century.
Integration efforts during the 1950s were shaped by two main influences. The first was the success of European integration, which demonstrated the potential economic benefits of regional cooperation. The second was the intellectual leadership of economists at the United Nations Economic Commission for Latin America, who advocated an import substitution industrialization strategy. According to this approach, developing countries could accelerate industrial growth by protecting domestic industries from international competition.
Because the effectiveness of import substitution depended heavily on market size, regional integration was seen as a way to expand domestic markets while preserving protection from global competition. In 1958, the five Central American countries signed a treaty establishing a free trade area and adopted a regime that allocated regionwide monopolies to selected firms in order to exploit economies of scale. Each country was guaranteed an equal number of such industries to promote balanced development.
International criticism of this highly protectionist model, particularly from the United States, led to a shift in strategy. The General Treaty of 1960 replaced the earlier framework with a more trade-oriented approach. Rather than specifying which products qualified for free intraregional trade, all goods were liberalized unless explicitly exempted.
During its first decade, the CACM achieved remarkable results. Intraregional tariffs were eliminated rapidly, and a common external tariff was implemented across most product categories. As a result, trade among member countries expanded dramatically, and the share of intraregional trade in total exports increased substantially throughout the 1960s.
Despite these early successes, structural weaknesses became increasingly evident. Liberalization focused mainly on manufactured consumer goods, while barriers to intraregional agricultural trade remained. This contributed to significant trade imbalances, particularly for countries with limited manufacturing capacity. High external tariffs also led to trade diversion, as relatively expensive regional goods replaced cheaper imports from outside the region.
Institutional mechanisms designed to address these imbalances proved ineffective. Fiscal pressures mounted as tariff revenues declined, and political tensions escalated. The integration process collapsed in 1969 following a brief war between Honduras and El Salvador, after which Honduras withdrew from the common market.
A Revival of Integration Efforts in the 1990s
Regional integration efforts were revived in the early 1990s as part of a broader initiative to restore political stability in Central America. In 1991, the countries of the region signed the Tegucigalpa Protocol, which restructured the integration framework and established the System of Central American Integration (SICA) as an umbrella organization overseeing economic, political, social, and environmental cooperation.
This new phase of integration marked a decisive break from the inward-looking development model of earlier decades. Policymakers embraced an outward-oriented, export-led strategy that emphasized openness, competition, and integration into the global economy. Trade liberalization, tariff reduction, and market-oriented reforms became central objectives.
In 1993, member states committed to forming a customs union through the Guatemala Protocol, laying the groundwork for deeper economic integration. Progress since then has been uneven, affected by political changes, economic shocks, natural disasters, and funding constraints.
Nevertheless, by the mid-2000s substantial advances had been made. Most goods traded freely within the region, and the majority of tariff lines were harmonized under a common external tariff that was significantly lower than during the earlier integration period. Capital goods and raw materials faced minimal or zero tariffs, while final goods were subject to modest protection.
The implementation of the Central American–Dominican Republic Free Trade Agreement further reinforced regional integration by harmonizing trade disciplines across goods, services, investment, and intellectual property. Unlike earlier agreements negotiated bilaterally, this framework applied collectively across Central American countries, strengthening regional coherence.
Today, the CACM represents an evolving experiment in regional integration. While challenges remain, its transformation from a protectionist common market into an open, outward-oriented regional bloc reflects broader shifts in development strategy and the continuing relevance of regional cooperation in a globalized economy.