ESG and Climate-Related Disclosure Requirements in Hong Kong

The trajectory of Hong Kong's ESG and climate disclosure requirements is unambiguous. The 2028 deadline for full ISSB alignment is not a distant horizon — given the lead time required to build governance frameworks, data infrastructure, and reporting processes, organisations that begin serious preparation now will find the transition manageable. Those that wait will face compressed timelines, higher costs, and reputational risk in front of investors who are increasingly sophisticated in their ability to distinguish between authentic disclosure and performative compliance.

Contributing Advisor

Gigi Wong

Manager, Business Advisory Services

More fundamentally, Hong Kong's emergence as a global leader in sustainable finance — anchored by its role as the capital markets gateway to China's green transition — means that companies which genuinely embed ESG into their strategic planning will be better positioned to access capital, attract talent, and sustain long-term competitive advantage.

Understanding the regulatory architecture

Hong Kong's ESG disclosure framework operates across multiple layers — and each layer is tightening. The IFRS Foundation's jurisdictional profile for Hong Kong SAR (updated June 2026) classifies Hong Kong's current approach as 'partially incorporating ISSB Standards and permitting the use of ISSB Standards,' with a target of 'fully adopting ISSB Standards' — a target the government has anchored to 2028.

The HKEX ESG Code: The Foundation

The HKEX ESG Reporting Code remains the primary instrument for listed companies. The 2024 Amendments, which took effect for financial years commencing on or after 1 January 2026, introduced Part D of the Code — the 'New Climate Requirements' — directly modelled on IFRS S2 Climate-related Disclosures. These requirements mandate or incentivise disclosure across four pillars: governance, strategy, risk management, and metrics and targets.

The HKEX FAQ guidance (FAQ17.2, last updated December 2024) makes clear that issuers may use alternative international ESG frameworks — including the full ISSB Standards — so long as the ESG report clearly cross-references where each required disclosure under the ESG Code is addressed. Compliance with IFRS S1 and S2 is explicitly recognised as satisfying the New Climate Requirements.

The HKFRS Sustainability Disclosure Standards

In a significant development, the HKICPA issued the HKFRS Sustainability Disclosure Standards in 2026, with voluntary application available from 1 August 2026. These are fully aligned with IFRS S1 (General Requirements for Disclosure of Sustainability-related Financial Information) and IFRS S2 (Climate-related Disclosures), with no jurisdictional modifications — a deliberate policy choice that signals Hong Kong's intent to achieve seamless interoperability with global capital markets.

Under these standards, sustainability-related financial disclosures will ultimately need to be published simultaneously with related financial statements — eliminating the practice of staggered or standalone ESG reports that many companies currently rely upon.

The disclosure timeline: a phased approach with hard deadlines

The following table summarises mandatory obligations and transition milestones for entities operating in Hong Kong:

Note: LargeCap Issuers are defined as Hang Seng Composite LargeCap Index (HSCLI) constituents. The Mandatory Climate Disclosure Requirement applies to entities that were HSCLI constituents throughout the year immediately prior to the reporting year.

What the standards require

The New Climate Requirements, grounded in IFRS S2, demand significantly more than prior ESG codes. For decision-makers who have not yet worked through the details, the scope may be surprising.

Governance disclosures

Companies must disclose the board's oversight of climate-related risks and opportunities, including how management is monitored and held accountable. This is not a theoretical exercise — it requires documented processes, board-level engagement records, and clarity on which committee or function holds primary responsibility.

Strategy and scenario analysis

The New Climate Requirements ask companies to explain how climate-related risks and opportunities affect their strategy, business model, and financial planning across short, medium, and long-term horizons. Critically, they require the use of climate scenario analysis — including analysis of physical and transition risks. Smaller Main Board issuers can avail themselves of a 'capabilities relief' in initial periods, but LargeCap Issuers face mandatory full disclosure from FY 2026.

Metrics and targets

Beyond Scope 1 and 2 GHG emissions (now universally mandatory for all listed issuers), the requirements extend to Scope 3 emissions. Issuers must map their value chains against all 15 categories of the GHG Protocol Corporate Value Chain (Scope 3) Standard and justify any exclusions. For financial institutions active in asset management, commercial banking, or insurance, financed emissions (Scope 3 Category 15) are a particular area of scrutiny.

Implementation reliefs — including 'reasonable information relief,' 'commercial sensitivity relief,' and 'financial effects relief' — are available for specific disclosures, but they carry conditions: issuers must disclose that they have applied an exemption and reassess eligibility at each reporting date.

The broader ESG disclosure obligation

Decision-makers should resist the temptation to conflate climate disclosure with the full scope of ESG obligations. The HKEX ESG Code encompasses significantly broader territory:

• Part B (mandatory): Social and environmental KPIs including emissions intensity, energy and water use, waste management, supply chain practices, employee health and safety (covering both physical and mental well-being), diversity, and anti-corruption practices.
• Part C ('comply or explain'): Targets for emissions reduction (KPI A.1.5), waste reduction (KPI A.1.6), energy efficiency (KPI A.2.3), and water efficiency (KPI A.2.4).
• Part D (New Climate Requirements): Structured climate-related disclosures as outlined above.

Materiality under the ESG Code remains a board-level judgement call, defined as 'the threshold at which ESG issues determined by the board are sufficiently important to investors and other stakeholders that they should be reported.' This broad definition intentionally encompasses both financial materiality and wider stakeholder considerations — but where both types of information are disclosed, material investor-focused information must be clearly distinguishable and not obscured.

Hong Kong's green finance ecosystem and commercial opportunity

The regulatory tightening is not occurring in a vacuum. It is propelling Hong Kong's emergence as Asia's pre-eminent green and sustainable finance hub — and the commercial implications for well-prepared companies are substantial.

Hong Kong arranged green and sustainable bonds totalling US$27.8 billion in 2022, representing 35 percent of the regional market. The HKSAR Government's Green Bond Programme has issued nearly US$10 billion in green bonds, and in early 2023 completed Asia's first triple-currency green bond offering, attracting over US$36 billion equivalent in global orders.

For listed companies and financial institutions, the strategic calculus is increasingly clear: robust, credible ESG disclosure is no longer just a compliance requirement — it is a prerequisite for accessing green capital markets, attracting ESG-focused institutional investors, and maintaining competitive positioning in a market where ESG role hiring has surged by 25 percent between 2020 and 2022, with salary premiums exceeding 30% for sustainability professionals.

Hong Kong's position as a gateway to Mainland China amplifies this dynamic. The Greater Bay Area development agenda and China's own decarbonisation commitments — targeting carbon neutrality before 2060 — represent a multi-trillion-dollar green investment opportunity that flows through Hong Kong's capital markets infrastructure.

What boards are getting wrong

Across the corporate landscape, several recurring gaps are emerging in how companies are approaching this transition:

• Treating ESG as a reporting function rather than a governance function: The board's ownership of climate risk is non-negotiable under both the HKEX Code and the ISSB standards. Without documented board-level processes, oversight mechanisms, and strategic integration, disclosure obligations cannot be authentically met.
• Underestimating Scope 3 complexity: Many companies have Scope 1 and 2 measurement underway but have not yet mapped their value chains for Scope 3. Given the 2026 'comply or explain' obligations already in force for Main Board issuers, this gap is increasingly visible to investors and regulators.
• Misunderstanding 'comply or explain': The comply-or-explain basis is not a free pass. Companies that repeatedly 'explain' without a credible plan for future compliance face growing investor scrutiny and potential regulatory attention, particularly as LargeCap mandatory requirements set a visible benchmark.
• Fragmented reporting: The requirement under HKFRS Sustainability Disclosure Standards for sustainability disclosures to be published simultaneously with financial statements — covering the same reporting entity — means that companies currently operating with separate ESG report cycles face structural changes to their reporting calendar and data governance processes.
• Assurance readiness: While assurance over sustainability disclosures is not yet mandated, the Accounting and Financial Reporting Council is developing a local sustainability assurance framework, and HKEX plans a market consultation on mandatory assurance in 2027. Early adopters of voluntary assurance — ideally referencing the ISSA 5000 standard published in November 2024 — will be better positioned when mandates arrive.

A strategic roadmap for decision-makers: actions for 2026–2028

• Given the compressing timeline and the complexity of full ISSB alignment, boards and executive teams should prioritise the following:

Immediate (2026)

• Conduct a formal gap assessment against both Part D of the HKEX ESG Code (for current obligations) and the HKFRS Sustainability Disclosure Standards (for the 2028 target state).
• Establish or strengthen board-level governance of climate and sustainability risk — including clear committee accountability, management reporting lines, and integration with enterprise risk management.
• Commission a Scope 3 value chain mapping exercise to identify material emission categories and data availability gaps.

Near-Term (2026–2027)

• Begin voluntary application of HKFRS Sustainability Disclosure Standards, or at minimum align internal processes with their requirements, to build readiness before mandates arrive.
• Develop climate scenario analysis capability — even using available implementation reliefs — to begin understanding physical and transition risk exposure under multiple pathways.
• Engage with HKEX's 2027 consultation process on mandatory sustainability reporting requirements, including the assurance framework, to ensure organisational readiness is incorporated into planning cycles.

Strategic (2027–2028)

• Integrate sustainability disclosures into the annual reporting calendar on a simultaneous-publication basis, treating them as part of the general purpose financial reporting process.
• Invest in talent and systems: ESG data management, internal controls over non-financial reporting, and — where relevant — readiness for external sustainability assurance.
• For companies with international investor bases or cross-border listings, assess interoperability with EU (CSRD/ESRS), IOSCO, and SEC disclosure requirements, leveraging Hong Kong's ISSB alignment as a foundation.