CSE's 2026 ESG Mandate: What Every Sri Lankan Listed Company Must Do Now

If your company is listed on the Colombo Stock Exchange main board, ESG reporting is no longer optional. As of January 2026, every main board listed entity must comply with SLFRS S1 and SLFRS S2 — Sri Lanka's mandatory sustainability disclosure standards modelled on the International Sustainability Standards Board (ISSB) framework.

This is not a distant deadline. Annual reports covering the period beginning 1 January 2026 must include structured sustainability disclosures that meet the requirements of both standards. For companies whose financial year aligns with the calendar year, that reporting period has already begun.

What changed and when

The Institute of Chartered Accountants of Sri Lanka (CA Sri Lanka) issued a comprehensive implementation roadmap in January 2025, establishing a phased schedule for adoption of SLFRS S1 and SLFRS S2. The Colombo Stock Exchange followed with an amendment to Section 7 of its Listing Rules in March 2025, embedding the disclosure requirements into the formal obligations of listed companies.

The phased schedule works as follows:

January 2025 — Top 100 listed companies by market capitalisation on the CSE main board. These companies were required to disclose greenhouse gas (GHG) emissions, climate risks, and broader sustainability initiatives in their annual reports.
January 2026 — All entities listed on the CSE main board. The mandate extends across the board regardless of market cap or sector.
January 2027 — All CSE-listed entities except those on the Empower Board (the SME market segment).
January 2030 — Full market coverage, including Empower Board companies and listed SMEs.

The CSE is also expected to launch a dedicated ESG Index in 2026, designed to channel institutional and foreign investment flows toward ESG-compliant listed companies. Inclusion in this index will depend on the quality and completeness of a company's sustainability disclosures.

What SLFRS S1 and SLFRS S2 actually require

Both standards are aligned with the ISSB framework, localised for the Sri Lankan regulatory and market context. They are not general sustainability aspirations — they require structured, auditable disclosures organised around four pillars: governance, strategy, risk management, and metrics and targets.

SLFRS S1 covers general sustainability-related financial information. It requires companies to disclose how sustainability-related risks and opportunities are identified, assessed, and managed — and how this connects to the company's financial position and prospects. Governance disclosures must explain the board's oversight of sustainability matters and management's role in assessing and managing risks.

SLFRS S2 focuses specifically on climate. It requires disclosure of exposure to physical climate risks (flooding, extreme heat, sea-level rise) and transition risks (policy changes, carbon pricing, shifts in technology or market demand). It also requires quantitative emissions data — Scope 1 and Scope 2 at minimum, with Scope 3 encouraged — and climate targets where they exist.

Critically, both standards require cross-functional data. Finance, operations, facilities, HR, and procurement all hold data that feeds into these disclosures. That requires internal coordination most listed companies in Sri Lanka have not yet built.

The preparedness problem

Research and market observation suggest that the majority of Sri Lankan listed companies are not ready. A significant readiness gap exists even among larger companies: studies indicate only around 54 corporates in Sri Lanka have the data infrastructure to report Scope 1 emissions — a baseline requirement under SLFRS S2 — with confidence.

The common failure points are:

No baseline data. Companies have not been systematically collecting the environmental, energy, and emissions data needed to make compliant disclosures. Without historical data, there is no basis for targets or trend disclosures.
No governance structure on paper. SLFRS S1 requires companies to document the board's oversight of sustainability. Many boards have not formalised this — there are no board committee mandates, no risk register entries, no documented management processes.
Sustainability work not translated into disclosure. Many companies are doing substantive sustainability work — tree planting, energy efficiency, community programmes — but have never documented or quantified it in a way that meets disclosure standards. Good work is happening; it is just invisible in the annual report.
No internal owner. ESG reporting sits across departments. Without a designated owner who understands both the standard and the organisation, nothing gets coordinated.

What the CSE ESG Index means for your company

The CSE initially planned to launch its ESG Index in 2024 but postponed because most listed entities had not reached the required reporting standard. The index is now targeted for 2026 — and its criteria will be based on the quality and completeness of SLFRS S1 & S2 disclosures.

For companies, this matters beyond compliance. ESG indices attract institutional mandates — pension funds, development finance institutions, and foreign portfolio investors increasingly require ESG-screened exposure. Exclusion from the index means exclusion from these investment flows. Inclusion signals to the market that the company is managed with long-term risk discipline.

The practical path forward

For most listed companies, the path to compliant SLFRS S1 & S2 disclosures involves three stages:

Gap assessment. A structured review of what data exists, what governance is already documented, and where the largest gaps are relative to the standard's requirements. This produces a clear picture of the effort involved.
Data collection and governance documentation. Working across functions to gather the energy, emissions, water, waste, and social data required. Simultaneously, working with the board and management to document — in writing — the sustainability governance structures that already exist or that need to be put in place.
Disclosure writing. Translating the data and governance documentation into clear, structured annual report sections that meet the four-pillar requirements of SLFRS S1 & S2. This is the step most companies underestimate — technical data alone does not constitute a disclosure.

The 8–16 week timeline for a full engagement means companies that have not started should start now. Annual reports that cover the period beginning January 2026 will need to include these disclosures, and the data collection and governance work cannot happen in the weeks before report publication.

The bottom line

The 2026 CSE mandate is not a future consideration for Sri Lanka's listed companies — it is a present one. The reporting period has begun, the listing rule amendment is in force, and the ESG Index launch will create market-visible differentiation between companies that are compliant and those that are not.

Companies that move early will produce disclosures that reflect genuine work rather than rushed compliance. That is the difference between ESG as a credibility asset and ESG as a box-ticking exercise.