Korea ESG Disclosure: Navigating the FSC’s Expanded Mandatory Sustainability Reporting

Introduction: Korea’s Leap into Mandatory ESG Reporting

South Korea is rapidly aligning its corporate disclosure landscape with global sustainability standards. In a landmark move, the Financial Services Commission (FSC) finalized a roadmap for mandatory sustainability (ESG) disclosure, significantly expanding the number of companies required to report compared to earlier proposals. Starting in 2028, companies with assets exceeding KRW 10 trillion (approximately USD 6.7 billion) must publish ESG reports, with the threshold dropping to KRW 5 trillion in 2029, and potentially further to KRW 2 trillion from 2030. This phased expansion will cover over 290 companies initially and more than 3,100 by 2029, signaling a tectonic shift in Korea’s regulatory environment.

For multinational corporations, Korean subsidiaries, and domestic firms alike, understanding the FSC’s K-ESG compliance framework is no longer optional. The standards, issued by Korea’s Sustainability Standards Board (KSSB), are closely aligned with the ISSB’s IFRS S1 and S2, creating both opportunities and challenges for companies already navigating global ESG reporting requirements under the EU’s CSRD, the SEC’s climate disclosure rule, and California’s SB 253/261. This article provides a comprehensive analysis of Korea’s mandatory sustainability reporting requirements and a practical compliance roadmap.

Understanding the FSC ESG Roadmap: Phased Expansion and Key Dates

The FSC’s finalized roadmap introduces a staged approach to mandatory ESG disclosure, designed to give companies time to build capacity while ensuring progressive coverage.

• 2028: Companies with assets over KRW 10 trillion (~USD 6.7B) must report. Estimated coverage: 290+ companies.
• 2029: Threshold lowers to KRW 5 trillion (~USD 3.4B). Coverage expands to over 3,100 companies.
• 2030 onwards: Potential further reduction to KRW 2 trillion (~USD 1.3B), bringing thousands more firms into scope.

The standards, issued by the Korea Sustainability Standards Board (KSSB), are modeled on the ISSB’s IFRS S1 (General Requirements for Disclosure of Sustainability-related Financial Information) and IFRS S2 (Climate-related Disclosures). Companies must report on governance, strategy, risk management, and metrics and targets across environmental, social, and governance factors.

Transitional Reliefs and Support Measures

To ease the transition, the FSC has introduced several reliefs:

• Scope 3 emissions: A three-year postponement before mandatory reporting.
• Small business exemptions: Smaller entities are excluded from initial phases.
• Safe harbor from penalties: For three years, companies are protected from sanctions for reporting errors (excluding intentional greenwashing).
• Third-party verification: Required from 2030, giving firms time to establish assurance processes.

The government is also building a climate risk platform and developing sector-specific Scope 3 guidelines to support companies in meeting their obligations.

Comparing Korea’s ESG Regime with Global Standards

Korea’s approach mirrors the global trend toward mandatory, audited sustainability disclosures. However, there are important differences in scope, timeline, and stringency.

EU CSRD (Corporate Sustainability Reporting Directive)

Effective from 2024 (reporting in 2025) for large public-interest entities, the CSRD applies to a broader set of companies including non-EU firms with significant EU operations. It requires double materiality assessment and reporting against the European Sustainability Reporting Standards (ESRS), which are more prescriptive than ISSB. Korea’s KSSB standards are less granular but aligned with ISSB, making them more comparable to global baseline frameworks.

SEC Climate Disclosure Rule (US)

The SEC’s rule, adopted March 2024 but currently stayed pending litigation, would require registrants to disclose material climate risks, Scope 1 & 2 emissions (for large accelerated filers), and climate-related targets. Unlike Korea’s roadmap, the SEC rule has faced significant legal challenges and its future remains uncertain. Korea’s phased approach, with clear timelines and government support, offers more regulatory certainty.

California SB 253 and SB 261

California’s laws require companies with >$1B revenue doing business in the state to report Scope 1, 2, and 3 emissions (SB 253), and those with >$500M revenue to report climate-related financial risks (SB 261). These laws apply to many non-US companies, creating overlapping obligations for Korean firms with US operations. Aligning K-ESSB reporting with California’s requirements can reduce duplication.

ISSB Standards (Global Baseline)

Both Korea’s KSSB and the ISSB’s IFRS S1/S2 share a common foundation. Companies already reporting under ISSB will find K-ESB requirements familiar. Korea’s adoption of ISSB-aligned standards positions it as a leader in Asia, alongside jurisdictions like Japan and Singapore that are also converging with ISSB.

Step-by-Step Compliance Roadmap for Korean ESG Disclosure

To prepare for mandatory reporting, companies should follow a structured approach:

1. Assess Applicability: Determine if your company meets the asset threshold for your reporting year. Monitor FSC announcements for threshold reductions.
2. Gap Analysis: Compare current sustainability disclosures against KSSB standards (IFRS S1 and S2). Identify missing data points, especially governance, risk management, and metrics.
3. Data Collection and Systems: Establish processes for collecting ESG data (GHG emissions, energy use, workforce diversity, board composition, etc.). Leverage existing ERP and sustainability software. The government’s climate risk platform will provide additional resources.
4. Scope 1, 2, and 3 Emissions: Begin measuring Scope 1 and 2 emissions immediately. For Scope 3, use the three-year postponement to build supplier engagement and data collection capabilities. Sector-specific guidelines will help.
5. Internal Controls and Governance: Assign board-level responsibility for ESG oversight. Implement internal controls over data quality and reporting. The safe harbor period is the time to refine processes.
6. Assurance Readiness: Prepare for mandatory third-party verification from 2030. Engage assurance providers early to understand scope and methodology. Consider limited assurance initially, moving to reasonable assurance over time.
7. Report Preparation and Filing: Use KSSB-aligned templates. Ensure reports are in Korean (and possibly English for global stakeholders). File within the prescribed timeline.
8. Continuous Improvement: Monitor regulatory updates, participate in government consultations, and leverage the climate risk platform for benchmarking.

Practical Tips for Aligning with ISSB Standards

Given the alignment between KSSB and ISSB, companies can adopt a dual-purpose reporting approach:

• Use the same data and processes for both Korea and global ISSB-aligned reports. This reduces duplication and ensures consistency.
• Focus on financial materiality as the primary lens, but consider double materiality if also reporting under CSRD.
• Invest in technology for data collection, calculation, and reporting. Many software platforms now support ISSB and KSSB frameworks.
• Train internal teams on ISSB concepts, especially the integration of sustainability risks into financial planning.
• Engage with value chain partners early for Scope 3 data. The three-year postponement is a window to build relationships.

Key Takeaways

• Korea’s mandatory ESG reporting begins in 2028 for companies with assets over KRW 10 trillion, expanding to over 3,100 companies by 2029.
• KSSB standards align with ISSB’s IFRS S1 and S2, creating synergies for global reporters.
• Transitional reliefs include delayed Scope 3 reporting, small business exemptions, and a three-year safe harbor from penalties.
• Third-party verification becomes mandatory from 2030.
• Government support includes a climate risk platform and sector-specific Scope 3 guidelines.

How AIGovHub Can Help

Navigating Korea’s K-ESG compliance requirements alongside other global regimes like CSRD, SEC, and California’s SB 253/261 can be complex. AIGovHub’s ESG compliance tools provide a centralized platform for multi-jurisdictional reporting, gap analysis, and regulatory monitoring. Our interactive tools help you assess readiness, map data requirements, and generate reports aligned with KSSB and ISSB standards. Explore AIGovHub’s ESG compliance solutions to streamline your reporting journey and stay ahead of regulatory changes.

This content is for informational purposes only and does not constitute legal advice.