TS ISO 14030-3

TS ISO 14030-3 defines the taxonomy approach for green debt instruments and explains which investment categories may be regarded as eligible when a bond or loan is designated as green. The focus is on the economic activities that can be used to frame eligibility for projects, assets and supporting expenditures, making classification the core technical topic of this part of the series.

Why taxonomy matters in green debt instruments

In general technical terms, a taxonomy is used to sort environmental investment areas into a structured and comparable framework. Rather than simply applying a green label, it helps define which sectors and activity types may qualify. That distinction matters because different sectors, such as energy, transport or buildings, often require different evaluation criteria, and those distinctions improve consistency in green finance claims.

The abstract shows that this document categorizes economic sectors and establishes criteria for determining whether projects, assets and supporting expenditures are eligible. It also provides sector-specific adaptation guidance in Annex A and examples of thresholds and exclusions in Annex B. In practice, this means the assessment is not limited to the investment label itself; boundary conditions and exclusion logic are also part of the eligibility framework.

Positioned at the intersection of finance and environmental economics, this standard supports a common language for sustainable capital allocation. It helps issuers, lenders, investors and assessors interpret the eligibility basis behind green debt instruments in a more consistent way.