In brief: The Hong Kong Taxonomy is a classification tool for assessing whether defined economic activities meet specified green, transition or climate-adaptation criteria. Phase 2A, issued in January 2026, expanded the scope. It does not make an entire company sustainable by association.
A taxonomy provides a common language for financial and market decisions. It can support product design, financing discussions and transparency, but users must apply the current version to the exact activity and criteria. The outcome may be alignment, partial alignment, insufficient evidence or non-alignment; each is more informative than a broad company-level label.
Identify the exact economic activity
Map the project or revenue activity to the taxonomy structure and relevant industry classification. Avoid starting from a desired green label. Different parts of one company may have different eligibility and alignment outcomes.
Check technical criteria and version
Read the criteria, metrics, thresholds, scope and evidence for the activity. Confirm whether the assessment uses the 2024 taxonomy, Phase 2A or another specified version. Transition and adaptation activities may require different information from established green activities.
Build an evidence file
Collect project design, operating performance, asset, technology and location information needed for each criterion. Record assumptions and unresolved gaps. The assessment should be reproducible by a competent reviewer.
Communicate alignment precisely
State the activity, taxonomy version, assessment date, criteria and result. Distinguish eligibility from demonstrated alignment and avoid extending a project result to the whole company, portfolio or financial product without an appropriate basis.
A practical implementation sequence
Pilot one financing-relevant activity. Have business, technical, finance and sustainability teams map criteria and evidence together, then review claims and data gaps before the result is used externally.
- Identify the activity and applicable classification.
- Confirm the current taxonomy version and criteria.
- Map every criterion to evidence and an owner.
- Document gaps, assumptions and assessment date.
- Approve precise external language and review triggers.
For every step, retain the owner, source, reporting period, method, version, reviewer and known limitations. Estimates can be useful during transition, but they should never be presented as measured data.
Decision risks to control
- Calling a company green because one activity aligns.
- Confusing eligibility with evidence-based alignment.
- Using an outdated taxonomy without identifying the version.
Keep the activity map, criteria checklist, technical evidence, calculations, reviewer notes, version reference and approved wording. Reassess when the project, activity or taxonomy changes.
Frequently asked questions
What did Phase 2A add?
It expanded green activities and incorporated transition activities and a climate-change adaptation category.
Does taxonomy eligibility prove alignment?
No. Eligibility identifies a potentially covered activity; alignment requires the applicable technical criteria and evidence to be satisfied.
Is the taxonomy only for banks?
Financial institutions are key users, but businesses and project sponsors may use it to prepare evidence and communicate with finance providers.
Can an entire company be taxonomy-aligned?
Assessments generally relate to defined activities. Any company-level aggregation requires clear methodology, scope and evidence.
Authoritative sources
This article is for general information and education only. It is not legal, investment, financial, assurance, certification, compliance or other professional advice.