South Korea Defines Its ESG Reporting Route

The latest announcements give the Korean market more than another policy update. They connect the future mandatory disclosure regime with a settled domestic standard, making the next stage of implementation easier to read.

South Korea has moved two parts of its sustainability reporting framework forward within two days of each other. On 25 February 2026, the Financial Services Commission set out a draft roadmap for mandatory ESG disclosure, and on 26 February 2026, the Korea Sustainability Standards Board (KSSB) approved and published the first set of Korean sustainability disclosure standards. Companies now have a draft implementation path alongside a domestic standard built on ISSB foundations.

The immediate change is from broad policy direction to a more defined implementation model.

Anchored in Finalised Standards

The FSC says Korea’s final sustainability disclosure standards have been settled and presents a draft roadmap for institutionalising ESG disclosure, with public consultation running until the end of March 2026 and finalisation planned for April.

The following day, KSSB announced that it had approved and published the first set of sustainability disclosure standards. The package includes KSSB Disclosure Standard No. 1 on general requirements, KSSB Disclosure Standard No. 2 on climate-related disclosures, a summary of the main contents, a first-set snapshot and comparison materials against the exposure drafts and IFRS S1 and IFRS S2.

These steps do not create an immediate duty for all listed companies. They do, however, establish the model preparers now need to follow: a mandatory regime supported by a finalised domestic standard and implementation materials.

The implication is practical: internal planning can now move onto a firmer footing.

Who Enters First, and When

The FSC says mandatory disclosure would begin in 2028 for KOSPI-listed companies with consolidated assets of KRW 30 trillion or more. It also gives an example of expansion from 2029 to KOSPI-listed companies with consolidated assets of KRW 10 trillion or more, with any later widening to be discussed in light of international developments and market readiness.

The scope of the first phase carries further conditions. In the first reporting year only, certain domestic and overseas subsidiaries that meet specified conditions may be left out of scope. The FSC gives the example of subsidiaries representing less than 10% of consolidated assets or revenue.

Scope 3 emissions are treated separately. The FSC says disclosure would in principle begin from FY2030, reported in 2031, once the infrastructure for measurement and estimation is in place. It also says that small enterprises under the Small and Medium Enterprise Basic Act that are not in high-carbon-emitting sectors within the value chain may initially be exempted from Scope 3 disclosure, with that exemption to be reviewed later.

The disclosure channel is phased as well. The FSC proposes that reporting should begin through exchange disclosure and only later move into statutory disclosure under the capital markets regime. Annual disclosure would in principle be made around the end of March, but greenhouse gas emissions information may be filed later because emissions are separately verified on another timetable.

Why the Policy Signal is Stronger Now

The key change is the level of specificity. The FSC is no longer speaking only in general terms about future ESG reporting. It has identified a starting population, outlined a potential second phase, set out a different timetable for Scope 3, proposed an exchange-first route and indicated the supervisory approach for the early years.

The announcement also places disclosure within Korea’s wider green transition agenda. The FSC links ESG disclosure to corporate transition financing and to the country’s 2035 Nationally Determined Contribution. Sustainability reporting is thus positioned as part of transition-related market infrastructure rather than as a stand-alone transparency exercise.

The implication is direct: this affects internal planning now.

What the Framework Means in Practice

The technical structure follows the ISSB model. The FSC summarises the final Korean sustainability disclosure standard around four content areas: governance, strategy, risk management, and metrics and targets. Governance covers the monitoring, management and oversight of climate-related risks and opportunities. Strategy addresses the effects of those risks and opportunities on strategy, decision-making and finance. Risk management covers identification, assessment, prioritisation and monitoring. Metrics and targets include greenhouse gas emissions, quantitative information on exposed assets or business activities, climate-related targets, internal carbon price on an optional basis and selected industry-based metrics.

For reporting teams, the governance and process channel is central. IFRS says IFRS S1 requires disclosure about the governance processes, controls and procedures used to monitor, manage and oversee sustainability-related risks and opportunities, while IFRS S2 applies that architecture to climate-related disclosures. In the Korean framework, this means companies will need processes that can support oversight, explain strategic and financial effects and document how climate-related risks and opportunities are identified and managed.

The data and controls channel raises its own demands. The separate timetable for Scope 3 shows that the FSC sees emissions data readiness as a real implementation constraint. The separate filing window for greenhouse gas data reflects the same constraint.

The disclosure and assurance channel is being phased rather than imposed in full from the outset. The FSC proposes a safe harbour for disclosures using forecasts or estimates in the early stage, says supervision should focus on guidance rather than sanctions at first and indicates that third-party assurance would initially be voluntary, with phased mandatory assurance to be considered later.

Points for Reporting Teams to Track

The most immediate point is not only the 2028 start date. It is the combination of phased scope, deferred Scope 3, exchange-first filing, early-stage safe harbour and voluntary assurance, because those design choices will shape how companies sequence governance, data and disclosure work.

The next milestone is April 2026. The consultation draft already gives a strong indication of direction, but the final roadmap and the related amendments to exchange disclosure rules will determine how quickly the policy model becomes an operational obligation.

Korea is building a regime that is clearly ISSB-based but deliberately phased in timing, scope and assurance. For reporting teams, that means the focus should shift from watching policy discussion to building the governance, data and reporting infrastructure needed for implementation.