Chile · Mercosur · Trade Policy · Regional Integration
Chile and Mercosur: Close, but Not Bound
Chile has been connected to Mercosur for nearly thirty years — and has never joined. That tension is not an oversight. It is a deliberate trade strategy.
Chile is close to Mercosur by design, but not institutionally bound to it.
ACE No. 35 gives Chile deep commercial access to Argentina, Brazil, Paraguay and Uruguay while associated-state status preserves the flexibility to maintain its own external trade policy. Bolivia is now a full Mercosur member, but Chile’s bilateral trade framework with Bolivia remains ACE No. 22 rather than ACE No. 35.
For broader context, see Chile market insights, the Chile market profile and Econosur’s broader Southern Cone market structures.
Core market reading:
Chile uses Mercosur as a regional anchor, not as the centre of its trade architecture. The value of the relationship lies in controlled proximity: enough access to matter, enough distance to remain globally flexible.
Chile has been connected to Mercosur for nearly thirty years — and has never joined. That tension is not an oversight. It is a strategy.
ACE No. 35: The Commercial Foundation
The institutional framework has long been in place. Chile is not a full member of Mercosur but an associated state. The economic foundation is ACE No. 35, in force since 1996 between Chile and the bloc.
According to Chile’s foreign trade authority, Chilean exports have enjoyed tariff-free access to Argentina, Brazil, Paraguay and Uruguay since 2012, without exceptions. The relationship is therefore neither loose nor symbolic. It is materially and commercially substantial. It just stops short of full institutional integration.
Mercosur itself has changed since the agreement was signed. Bolivia became a full Mercosur member in August 2024. That does not automatically fold Chile–Bolivia trade into ACE No. 35: SUBREI continues to list the bilateral Chile–Bolivia relationship separately under ACE No. 22, while ACE No. 35 remains the Chile–Mercosur agreement signed with Argentina, Brazil, Paraguay and Uruguay.
The Economic Complementation Agreement between Chile and Mercosur has been in force since 1996. It grants Chilean exporters tariff-free access to Argentina, Brazil, Uruguay and Paraguay — fully phased in since 2012.
Bolivia is now Mercosur’s fifth full member, but Chile–Bolivia trade continues under the separate ACE No. 22 framework. Associated-state status allows Chile to participate in Mercosur summits on topics of common interest without being bound by the bloc’s common external tariff or internal decision-making structures.
A Deliberate Architecture
That is precisely where the strategic interest lies.
Chile is close enough to Mercosur to benefit from regional market opening, geographic proximity and political coordination. At the same time, it remains free to develop its global trade architecture on its own terms.
This logic was visible again at the end of 2024, when Chile and Mercosur agreed to modernise the rules-of-origin regime under ACE No. 35 — updating the agreement to reflect contemporary trade realities rather than merely administering it.
The same pattern remained visible in 2026. At the LXVIII Mercosur presidential summit in Asunción on June 30, Chile participated again as an associated state, represented by President José Antonio Kast. The signal is consistent: Santiago remains politically present in Mercosur while staying institutionally outside the bloc.
"Chile keeps Mercosur close without allowing itself to be absorbed by it."
The Balance Function
Understanding Chile’s position requires looking beyond South America.
Mercosur matters to Santiago — but not because it sits at the centre of Chile’s trade strategy. That role it does not hold.
China remains Chile’s largest trading partner. In the first half of 2026, it accounted for 30.8 percent of Chile’s goods trade, followed by the United States with 17.7 percent. CPTPP economies together represented 12.8 percent. Econosur examines the China relationship in more detail in its Chile–China analysis.
More important for the strategic argument, 95.9 percent of Chile’s goods trade in the first half of 2026 was conducted with economies covered by trade agreements. Chile therefore operates through an unusually dense external trade architecture rather than through one dominant regional bloc.
Mercosur nevertheless remains commercially significant. SUBREI recorded USD 22.934 billion in Chile–Mercosur goods trade in 2025, equal to 11.3 percent of Chile’s total goods trade, and describes the bloc as an important source of intermediate goods. The relationship is therefore economically meaningful even though it is not the centre of Chile’s external trade system. For the wider regional context, see Econosur’s analysis of how global shocks are reordering Mercosur’s economic map.
"The deeper Chile is embedded in global trade relationships, the more valuable a stable regional anchor becomes."
That is precisely why Mercosur takes on a different function for Chile. It is not the stage on which Chile builds its entire trade future. It is a regional anchor within a trade strategy otherwise shaped by larger global relationships.
Mercosur is not an alternative to China or the United States. It is the counterweight that keeps the balance.
Chile simultaneously keeps expanding that external network. The Interim Trade Agreement with the European Union entered into force in February 2025, modernising the commercial framework with Europe. In August 2026, Chile and India were still advancing negotiations on a Comprehensive Economic Partnership Agreement, which SUBREI described as a priority for market diversification. These moves reinforce the same logic: regional proximity to Mercosur alongside independent trade-policy expansion elsewhere.
Chile’s Mercosur position is a balancing instrument.
It gives Santiago regional anchorage without weakening the external trade flexibility that defines Chile’s broader economic model.
Chile’s distance from full Mercosur membership becomes more rational, not less, as its external trade network expands.
In the first half of 2026, 95.9 percent of Chile’s goods trade was already conducted with economies covered by trade agreements. At the same time, Mercosur remained an important regional supplier of intermediate goods and represented 11.3 percent of Chile’s goods trade in 2025. This suggests that Chile does not need to choose between regional integration and global openness: ACE No. 35 allows it to capture much of Mercosur’s commercial value without surrendering control over its external trade policy.
What Chile Represents for the Bloc
For Mercosur, Chile is also more than a peripheral partner.
Chile embodies a different integration model from Mercosur’s five full members. It combines regional cooperation with high international mobility, demonstrating that South American engagement does not necessarily mean institutional merger.
That is what makes Chile interesting from a regional perspective: not as a candidate for full accession at any cost, but as an example of a functional, selective and durable form of integration.
From Santiago’s perspective, there is a strong case for holding to this model. Full membership would raise the symbolic weight of South American commitment but could cost flexibility — precisely the flexibility that has become the hallmark of Chilean trade policy.
Chile’s Model: Close Enough, Free Enough
The existing formula reads clearly: close enough to remain regionally relevant; free enough to remain globally effective.
Chile’s relationship with Mercosur is not a tentative rapprochement. It is a calibrated position in a world where economic dependencies and geopolitical weights are being redistributed.
This is not hesitation. It is the consequence of a trade architecture that Chile has built deliberately over three decades.
- Is Chile a full member of Mercosur or only an associated state?
- What is ACE No. 35 and why does it matter for Chile-Mercosur trade?
- Why does Chile prefer controlled proximity instead of full Mercosur membership?
- How does Chile balance Mercosur with China, the United States and the European Union?
- Why is Chile’s trade model different from Argentina, Brazil, Paraguay and Uruguay?
- What does Chile’s position show about selective regional integration in South America?
- How does Bolivia’s full Mercosur membership affect Chile’s ACE No. 35 framework?
- SUBREI — Chile-Mercosur agreement page — official Chilean reference for ACE No. 35, the 1996 entry into force and tariff-free access timeline.
- SUBREI — Modernisation of rules of origin — official announcement on the 2024 update to the ACE No. 35 origin regime.
- SICE/OAS — Chile-Mercosur ACE No. 35 — institutional archive of the Chile-Mercosur agreement framework.
- SUBREI — Chile foreign trade, H1 2026 — official source for the 95.9% trade-agreement coverage, China’s 30.8% share, the U.S. 17.7% share and the wider partner structure.
- SUBREI — Chile foreign trade, 2025 — official source for USD 22.934 billion in Chile–Mercosur goods trade and an 11.3% share of total Chilean goods trade.
- Mercosur — LXVIII Summit, June 2026 — official communiqué confirming Chile’s participation as an associated state and Bolivia’s participation as a full member.
- SUBREI — Chile–Bolivia ACE No. 22 — official bilateral framework used to distinguish Bolivia from Chile’s ACE No. 35 relationship with the original Mercosur signatories.
- SUBREI — Chile–EU Interim Trade Agreement — official source for the modernised EU trade framework effective from February 2025.
- SUBREI — Chile–India CEPA negotiations, August 2026 — current evidence of Chile’s continued market-diversification strategy.
- USTR — Chile — institutional reference for the U.S.–Chile trade relationship.
From regional proximity to trade-strategy reality
Chile’s Mercosur position is best understood as controlled proximity: commercial access and regional anchorage without surrendering the trade-policy flexibility that connects Chile to Asia, North America and Europe.
Econosur prepares custom market analysis for companies, analysts and institutions evaluating Chile, Mercosur, ACE No. 35, rules of origin, trade corridors and Southern Cone trade and market-access questions.
Explore custom market analysisFAQ
Is Chile a full member of Mercosur?
No. Chile is an associated state of Mercosur, connected through ACE No. 35, but it is not a full member and is not bound by the bloc’s common external tariff.
What is ACE No. 35?
ACE No. 35 is the Economic Complementation Agreement between Chile and Mercosur. It has structured Chile-Mercosur trade relations since 1996.
Why does Chile keep Mercosur close without joining fully?
Chile uses Mercosur as a regional anchor while preserving the flexibility to maintain its own global trade architecture with Asia, North America and Europe.
What does Chile’s Mercosur position reveal about regional integration?
Chile shows that South American integration does not always require full institutional merger. Its model is selective, functional and designed to preserve global trade mobility.
Does ACE No. 35 now include Bolivia?
No. Bolivia became a full Mercosur member in 2024, but Chile’s ACE No. 35 agreement remains the framework with Argentina, Brazil, Paraguay and Uruguay. Chile’s bilateral trade relationship with Bolivia continues under the separate ACE No. 22.
