Innovative Blended Financing to Enhance Debt-for-Nature Conversions in Latin America and the Caribbean

Latin America and the Caribbean (LAC) are home to unparalleled biodiversity, from the Amazon rainforest to vibrant marine ecosystems. At the same time, the region faces environmental challenges such as the severe erosion of natural capital and decline in key ecosystem services. Between 1970 and 2020, the region’s wildlife population has declined by 95%, one of the most severe losses of natural capital worldwide. 

The total cost of protecting 30% of terrestrial and marine areas by 2030 ranges from $9.6 billion to $11.4 billion across LAC, following international commitments and including one-time establishment expenses and recurring annual management costs. 

While conservation needs are high, public funding remains scarce. Many countries face macro-fiscal constraints, limited borrowing capacity, weak long-term incentives, and institutional barriers—all of which restrict their ability to invest in biodiversity. New financing models are therefore essential to mobilize resources at scale and accelerate progress toward global biodiversity targets.
 

To address these constraints, the Inter-American Development Bank (IDB) has been supporting LAC countries through debt-for-nature conversions, a financial operation where a country refinances part of its debt at lower costs and redirects the resulting savings toward protecting nature, biodiversity, or supporting climate resilience. 

A key factor behind the recent success of these operations has been the innovative use of IDB’s sovereign guarantee instrument, which enables countries to access financing on favorable terms, contingent on the implementation of policy reforms that create an enabling environment for the transaction and conservation commitments. 

In these types of operations, countries repurchase more expensive debt and generate savings to finance conservation. This frees up fiscal space for biodiversity finance without raising debt ceilings. With IDB’s support, Barbados, Ecuador and the Bahamas have already demonstrated the transformative potential of this approach. 

The IDB has been the leader in providing credit enhancement structures for development, providing $690 million in sovereign guarantees and mobilizing more than $2 billion in private financing to support debt conversions. It has been the first multilateral development bank to provide a sovereign guarantee for a debt conversion, participating in five out of the ten debt-for-development swaps since 2022.  
 

A newly approved IDB facility financed by the Global Environment Facility (GEF) will significantly enhance future debt-for-nature conversion operations, by combining resources from the IDB and the GEF to mobilize private investment for important projects.

It offers an innovative blended finance structure with two-step convertible feature designed to maximize donor resources, increase savings and incentivize strong conservation performance by countries.

• Step 1 — Guarantee Phase (Increasing Savings)
  GEF funds are deployed as a guarantee alongside IDB’s guarantee, reducing investor risk and increasing the savings generated by the debt-for-nature conversion.
• Step 2 — Grant Phase (Rewarding Performance)
  If conservation commitments are met, these same GEF resources are converted into performance-based grants and transferred to Conservation Trust Funds or similar governance structures. This dual mechanism enhances incentives, maximizes financial efficiency, and increases the overall conservation impact.

The IDB will contribute up to $641 million through ordinary capital and mobilized resources, and the GEF will contribute $40.2 million, including technical assistance. The new fund is expected to mobilize $147 million in resources for conservation through the savings it could generate with debt conversion and if GEF funds are converted into grants, provided conservation commitments are met, and the guarantee is not called. 
 

In the best-case scenario, GEF participation increases conservation funding by more than 30% compared with an IDB-only debt-for-nature conversion—providing substantial financial additionality, especially for countries that otherwise would generate limited savings.

The presence of the GEF—given its global environmental credibility and deep experience with Conservation Trust Funds—raises confidence among governments and private investors, accelerating replication across the region. It also plays a critical role in reinforcing the incentive structure embedded in debt-for-nature conversions, which is critical to ensure that governments deliver on conservation commitments. 

Financial incentives, triggered by clear and measurable indicators, help ensure that countries remain motivated to meet agreed conservation milestones in a timely manner. The facility will also share knowledge on the benefits, feasibility and functioning of the debt conversions in a systematic manner and implement a transparent monitoring, reporting and verification (MRV) system, thereby further fostering the uptake of these innovative transactions in the LAC region and beyond. 

A key element of the debt-for-nature conversions success is the existence of robust, credible governance mechanisms for managing conservation funding. Conservation trust funds play a critical role by mobilizing resources, facilitating partnerships with the private sector, and mainstreaming biodiversity into public policy.

Through the new GEF-financed facility, the IDB will strengthen the institutional capacity of RedLAC, the regional network of environmental funds, and its conservation trust fund members by:

• Supporting RedLAC’s institutional development and management capacity;
• Helping members of conservation trust funds implement recommendations from their self-assessments;
• Providing capacity-building to help funds meet international standards and support innovative financial mechanisms.

These efforts will ensure that conservation resources are managed effectively and sustainably across the region.

With enhanced financial additionality, increased incentives, strengthened conservation trust fund governance, and high investor confidence, the IDB-GEF facility creates a powerful platform for scaling debt-for-nature conversions across Latin America and the Caribbean and beyond. The initiative is expected to generate up to 37.7 million hectares of new or better managed protected areas, benefiting more than 500,000 people across at least three countries.

This innovative blend of financial engineering, environmental incentives, and institutional strengthening positions LAC as a global leader in nature-positive finance—and marks a major step toward achieving regional and global biodiversity commitments.