ESG Readiness: Benchmarking Against IFRS S1 and S2 Before Disclosure Is Demanded

Disclosure expectations in Hong Kong are moving on a defined pathway, and the practical question for many issuers is no longer whether to prepare but how to evidence readiness. A readiness assessment benchmarks existing sustainability-related financial disclosures against IFRS S1 and IFRS S2, then records what is missing, who owns it, where the data comes from and what remediation is required. The standards are designed for information useful to primary users of general-purpose financial reports, focusing on sustainability-related risks and opportunities that could affect an entity's prospects.

Start With the Right Scope and Materiality

IFRS S1 sets general requirements for sustainability-related financial disclosures; IFRS S2 specifies climate-related disclosures and is applied with S1's general requirements. Readiness work should therefore test whether information about sustainability-related risks and opportunities could reasonably be expected to affect the entity's prospects, and whether the relevant information is complete enough for users to understand those effects. This is a financial materiality test, not a broad ESG inventory. A long list of initiatives is not a substitute for evidence that connects to prospects, cash flows and the financial statements.

Use the Four Pillars as a Gap Checklist

The four-pillar structure — governance, strategy, risk management, and metrics and targets — provides a workable gap checklist. HKEX's climate disclosure requirements are modelled on IFRS S2 and cover these areas. A practical review follows evidence through to financial effects for each material topic:

• Governance: board and management oversight records, responsibilities and how climate-related matters are considered.
• Strategy: how identified risks and opportunities affect the business model, strategy and financial planning, including resilience considerations.
• Risk management: how risks are identified, assessed, prioritised and integrated into existing risk processes.
• Metrics and targets: the measures used, targets set, performance against them, and the data, assumptions and controls behind the numbers.

For valuation and audit teams, the same evidence should be documented alongside assumptions, limitations and how significant factors affect the analysis. IVS effective 31 January 2025 states that significant ESG factors should be considered in determining the value of a company, asset or liability, to the extent measurable and reasonable under professional judgement, and it requires professional scepticism.

Know the Hong Kong Timeline and the HKEX Bridge

Hong Kong's December 2024 roadmap anticipates full adoption of the ISSB Standards by large publicly accountable entities no later than 2028. HKEX was expected to consult in 2027 on mandating Hong Kong Standards for listed issuers, with a contemplated 2028 start, subject to consultation. In the meantime, revised climate-related requirements in the Listing Rules' ESG Reporting Code took effect for financial years beginning on or after 1 January 2025. Hang Seng Composite LargeCap Index constituents face mandatory climate disclosure from financial years beginning on or after 1 January 2026.

Scope 1 and Scope 2 emissions disclosure is described in HKEX guidance as mandatory from financial years beginning on or after 1 January 2025, while other climate requirements have differentiated application by issuer category. HKICPA published the Hong Kong Sustainability Disclosure Standards in December 2024, described by HKEX as fully aligned with ISSB Standards, with a stated effective date of 1 August 2025. HKEX's linkage material says the listing-rule climate requirements are intended to prepare issuers for reporting under the Hong Kong Standards, and issuers reporting in full under IFRS S1 and S2 are deemed to comply with the climate-related Part D requirements.

Build a Remediation Register, Not a One-Off Report

A readiness assessment is most useful when it produces a living register: each gap, the responsible owner, the data source, the remediation action and the target date. That register should be revisited as standards develop. An ISSB staff paper from 2025 discusses proposed targeted IFRS S2 amendments addressing application challenges for GHG disclosures, including Scope 3 Category 15 and financed-emissions disaggregation, and records a staff recommendation for a 1 January 2027 effective date with early application permitted. That is a staff recommendation in the cited paper, not confirmation that the amendments were issued or became effective.

Ascent Partners Foundation's ESG readiness assessment is designed to support this kind of structured gap review. For further context, see HKICS on ESG reporting for Hong Kong listed issuers, HKEX's linkage guidance, and the International Valuation Standards effective 31 January 2025.