ASEAN SDG bond toolkit
This toolkit provides a practical guide for issuing SDG bonds in ASEAN, defined as green, social and sustainability (GSS) bonds aligned with specific SDGs. It builds on existing standards without creating a new label, focusing on mapping proceeds to SDGs and strengthening impact reporting to support sustainable capital market development.

Emerging opportunities for SDG bonds in ASEAN
ASEAN’s exposure to climate risks and development challenges creates strong demand for SDG financing. Sustainable bonds reached US$12.1 billion issuance in 2020, with cumulative ASEAN-labelled bonds exceeding US$17 billion since 2017. SDG bonds can mobilise institutional capital at scale, offering suitable risk-return profiles and aligning with growing investor demand for ESG and SDG-linked investments.

SDG financing needs in ASEAN
ASEAN requires substantial investment to meet SDGs, with infrastructure needs estimated at US$2.8 trillion between 2016 and 2030 (around 5% of GDP annually). Key sectors such as water, energy and infrastructure face a US$538 billion shortfall. Social SDGs also require 6–7.5% of GDP in some countries. Public funding is insufficient, making private capital mobilisation through instruments such as SDG bonds essential.

Rationale for an ASEAN SDG bond toolkit
The toolkit addresses low awareness and technical capacity among issuers, particularly DFIs and policy banks. Investors demand improved transparency, with 60% reporting inadequate impact disclosure. The toolkit provides guidance on SDG mapping, eligibility, metrics and reporting, supporting ASEAN’s sustainable finance roadmap and encouraging broader issuer participation.

What are SDG bonds and how to issue them?
SDG bonds are GSS bonds whose proceeds finance projects contributing to specific SDGs. Issuance follows ICMA Principles and ASEAN Standards covering use of proceeds, project selection, management and reporting. Most SDG bonds are use-of-proceeds instruments requiring defined frameworks, external review and impact reporting. They enable issuers to link financing with measurable sustainability outcomes while meeting investor expectations.

Key principles relevant for the issuance of an impactful SDG bond
Nine principles guide issuance, including targeting national SDG gaps, maximising private capital, applying local context, and ensuring projects deliver positive outcomes without harming other SDGs. Issuers should promote equitable investment, avoid ‘SDG washing’ through exclusions, and adopt granular metrics aligned with SDG indicators. Continuous monitoring and transparent reporting are critical for credibility and impact.

Examples of SDG bond frameworks and related resources
Examples from ANZ, AFD, Mexico and CIMB illustrate varied approaches to SDG mapping, eligibility and reporting. Mexico’s framework uses a social gap index to target 1,345 municipalities. Impact metrics include emissions reductions, infrastructure outputs and beneficiary data. Resources such as ICMA guidance and UN SDG indicators support framework design and reporting standardisation.

Issues for further considerations in issuing an SDG bond
Challenges include limited social taxonomies, inconsistent impact reporting, and evolving regulatory requirements. Issuers need stronger data systems, governance and organisational capacity. Market development requires supportive policies, technical assistance and service providers. Improved guidance on impact measurement and thresholds for avoiding harm is needed to enhance transparency and scalability.