ESG Materiality Assessment: How to Identify What Actually Matters for Your Business

Why materiality is the most important concept in ESG reporting

Every ESG framework — GRI, SASB, TCFD, IFRS S1, and S2 — is built on a single foundational principle: organisations should report on the ESG topics that matter most, not on everything. Materiality is the process by which an organisation determines what matters most. Getting it right defines the quality of your entire ESG programme. Getting it wrong — either by treating everything as equally important or by narrowing the scope too aggressively — produces reports that are either unmanageable or not credible.

In Kenya, materiality assessment is explicitly required by the NSE ESG Disclosures Guidance Manual for listed companies, implicitly required by the IFC Performance Standards (through the PS 1 identification and assessment process), and will be formally required under the forthcoming CMA ESG Code aligned with IFRS S1. For DFI-financed projects, materiality is the starting point of the ESMS design process.

The two definitions of materiality — and why both matter

One of the most important developments in global ESG reporting in recent years is the formalisation of two distinct definitions of materiality, which approach the same question from opposite directions.

Impact materiality (GRI approach): An ESG topic is material if it represents a significant actual or potential impact of the organisation's activities on the economy, the environment, or people — including human rights. This is outward-looking: it asks what the organisation does to the world. GRI 2021 uses double materiality: a topic is material if it has significant impact OR is financially significant to the organisation.

Financial materiality (IFRS S1/SASB approach): An ESG topic is material if it represents information about sustainability-related risks and opportunities that could reasonably be expected to affect the organisation's cash flows, access to finance, or cost of capital. This is inward-looking: it asks what the world does to the organisation's financial performance.

Double materiality (forthcoming CMA ESG Code, aligned with ISSB/ESRS): The approach expected under Kenya's forthcoming binding ESG code combines both dimensions — an organisation must report on ESG topics that are either financially material (affect the company) or impact material (the company affects the world through them).

For East African organisations building their first materiality assessment, using double materiality from the outset is the most future-proof approach. It satisfies GRI requirements for stakeholder reporting, aligns with IFRS S1's financial materiality lens for investor disclosure, and positions the organisation for the incoming regulatory requirements.

The materiality assessment process: five stages

A rigorous materiality assessment follows a defined process. The quality of the outcome depends on the quality of stakeholder engagement and the rigour of the prioritisation methodology.

Stage 1 — Universe of topics: Start with a comprehensive list of potential ESG topics relevant to your industry and geography. This typically includes 30 to 50 topics spanning environmental, social, and governance categories. GRI's topic standards, SASB's industry-specific material topics, and ESRS sector standards all provide useful starting inventories.

Stage 2 — Stakeholder engagement: Survey and/or interview a representative cross-section of your key stakeholders — investors, lenders, employees, customers, suppliers, local communities, and regulators. Ask each group which ESG topics they consider most significant in relation to your business. The quality of your stakeholder mapping and outreach directly determines whether your materiality matrix reflects genuine stakeholder views or an internal perspective dressed up as external.

Stage 3 — Internal impact assessment: In parallel with external stakeholder engagement, assess each topic's significance from the organisation's internal perspective — the magnitude and likelihood of financial risk or opportunity, and the scale and scope of environmental or social impact attributable to the organisation's activities.

Stage 4 — Prioritisation and the materiality matrix: Plot topics based on their significance to stakeholders (external axis) against their significance to the business (internal axis). Topics that score highly on both dimensions are material and must be reported. Topics in the middle require judgement. Topics at the low end of both dimensions can be excluded from the scope of reporting with documented rationale.

Stage 5 — Validation and documentation: The materiality assessment must be approved by senior management or the board, documented with methodology and evidence of stakeholder engagement, and disclosed as part of the organisation's ESG report. It should be reviewed and updated on a regular cycle — typically annually for fast-moving sectors or every two to three years for stable operating environments.

Common mistakes to avoid

Conducting materiality internally without genuine external input. The most credible materiality assessments involve real stakeholder engagement — surveys, interviews, or focus groups with actual investors, community representatives, and employees. Assessments derived solely from management views are vulnerable to challenge from lenders and assurance providers.

Setting the materiality threshold too low. If every topic ends up being material, the assessment has failed its primary purpose. A robust process should reduce the universe of topics to a manageable set — typically 10 to 20 material topics — that the organisation can report meaningfully against.

Treating materiality as a one-time exercise. A materiality assessment conducted in 2022 may not reflect 2026 realities, particularly given the pace of regulatory change in Kenya's ESG landscape. Materiality is a living determination that should be reviewed as the business, its stakeholders, and its regulatory environment evolve.

Failing to connect materiality to strategy. The output of a materiality assessment should directly inform which ESG topics the organisation sets targets on, invests in managing, and reports against. If the material topics don't appear in the board's ESG agenda and management's performance metrics, the assessment has not been integrated into the business.

3 critical questions for East African organisations

1. Has your materiality assessment genuinely engaged external stakeholders — investors, lenders, community representatives, and regulators — or does it primarily reflect management's view of what matters?

2. Does your current set of material ESG topics reflect both what your business does to the world (impact materiality) and what ESG factors could affect your financial performance (financial materiality) — or only one dimension?

3. Is your materiality assessment reviewed regularly and connected to your board's ESG oversight, your management targets, and your public reporting — or was it conducted once and filed?

*Ardena's ESG Strategy and Implementation service covers end-to-end materiality assessment design, stakeholder engagement, prioritisation, and integration into ESG reporting programmes. Contact us to build a materiality process that will stand up to investor and lender scrutiny.*