Double Materiality Assessment
South Africa

Double materiality assessment in South Africa: King IV Report on Corporate Governance; JSE Sustainability Disclosure Guidance; moving toward ISSB alignment

South Africa has a long history of sustainability reporting through the King Code on Corporate Governance and the JSE Listings Requirements. King IV (effective 2017) recommends that organisations prepare an integrated report and apply the principle of integrated thinking, which considers the organisation's effect on its stakeholders and the resources and relationships it depends on. This is conceptually similar to double materiality, though King IV does not use that term or prescribe the structured assessment methodology required by ESRS 1.20-33. The JSE published Sustainability Disclosure Guidance in 2022, recommending disclosure aligned with the TCFD and encouraging adoption of internationally recognised frameworks (GRI, ISSB, CDP). The JSE has signalled its intention to move toward mandatory climate-related disclosure based on the ISSB standards (IFRS S1, IFRS S2), though no mandatory effective date has been set as of early 2026. The ISSB standards use single materiality (financial materiality for investor decisions), which differs from the EU's double materiality approach. However, South Africa's integrated reporting tradition means that many JSE-listed entities already consider both financial and non-financial impacts in their reporting, even without a formal double materiality requirement. South African entities with EU operations or EU-listed securities face CSRD obligations and must perform a double materiality assessment under ESRS 1.20-33 for their European reporting. Given the differences between King IV integrated reporting and ESRS, these entities should plan for a structured assessment process that serves both frameworks.

Regulatory context: Johannesburg Stock Exchange (JSE) and Financial Sector Conduct Authority (FSCA)

The JSE is South Africa's primary regulator for listed company sustainability disclosure. The JSE Listings Requirements mandate compliance with King IV on an "apply and explain" basis. King IV Principle 5 requires the governing body to ensure that reports enable stakeholders to assess the organisation's performance and its impact on the capitals (financial, manufactured, intellectual, human, social and relationship, natural). This multi-capital approach creates a practical overlap with double materiality. The Financial Sector Conduct Authority (FSCA) regulates financial institutions and has published draft guidance on climate-related disclosure for the financial sector. The South African Reserve Bank (SARB) has included climate risk in its prudential supervision framework. For banks and insurers, climate materiality assessment is becoming a regulatory expectation through both the FSCA and SARB channels. The Independent Regulatory Board for Auditors (IRBA) oversees audit quality in South Africa and will likely oversee sustainability assurance as it becomes formalised. South Africa's audit profession is well developed, and many large audit firms already provide assurance on sustainability information under ISAE 3000 (Revised).

Practical guidance for South Africa

South African entities should build on their integrated reporting experience. King IV's integrated thinking approach provides a foundation for identifying sustainability matters, but the assessment must be formalised to meet any future mandatory requirements. Start with the six capitals framework (financial, manufactured, intellectual, human, social and relationship, natural) and map sustainability matters to each capital. Then apply a materiality assessment methodology, whether ISSB-based (financial materiality only) or ESRS-based (double materiality) depending on the entity's reporting obligations. For JSE-listed entities voluntarily adopting ISSB standards, the materiality assessment follows IFRS S1 paragraphs 17-19. For entities also reporting under CSRD, extend the assessment to include impact materiality per ESRS 1.43-44. Use existing integrated report data as evidence input. South Africa's mining sector faces specific materiality challenges. Mining companies must assess E1 (energy-intensive operations, methane from underground mining), E2 (acid mine drainage, dust, tailings), E3 (water use in water-stressed regions), E4 (habitat destruction, mine rehabilitation), and S3 (community displacement, health impacts from mining activities). The Mineral and Petroleum Resources Development Act (MPRDA) and mine environmental management plans provide regulatory and evidence context.

Audit expectations

South African registered auditors providing assurance on sustainability information must comply with ISAE 3000 (Revised). IRBA oversees audit quality and has indicated it will extend its inspection programme to sustainability assurance as mandatory requirements develop. The current assurance market in South Africa is primarily voluntary, with large JSE-listed companies obtaining independent assurance on selected sustainability indicators. For entities subject to CSRD, assurance must meet EU requirements. South African assurance providers may need to demonstrate equivalence with EU assurance standards, or the entity may need to engage EU-qualified practitioners for CSRD-specific assurance.

South Africa-specific considerations

South Africa's Broad-Based Black Economic Empowerment (B-BBEE) framework creates a unique intersection with sustainability reporting. B-BBEE scorecards assess ownership, management control, skills development, enterprise and supplier development, and socio-economic development. Several B-BBEE elements overlap with ESRS S1 (workforce diversity, skills development), S2 (supplier development), and S3 (community investment). Entities should map B-BBEE data to ESRS topics to avoid duplicate data collection. Load shedding (rolling blackouts due to electricity supply constraints) is a persistent issue affecting South African entities' E1 assessments. Entities investing in backup diesel generation increase their Scope 1 emissions, while those installing solar and battery systems reduce grid dependence. The financial materiality of energy security (lost production during load shedding, capital investment in alternative energy) should be captured in the climate materiality assessment. Water scarcity is a structural risk for many South African entities. The country's National Water Resource Strategy identifies several catchment areas as stressed or critical. E3 Water and marine resources is material for entities operating in water-stressed areas, particularly in mining, agriculture, and beverage manufacturing.

Common inspection findings

The JSE's 2024 review of sustainability disclosures found that many listed entities disclosed sustainability information in narrative form without a structured materiality assessment, relying on the assumption that integrated reporting was sufficient.

IRBA's audit quality inspection reports identified that auditors were not consistently considering climate-related risks in financial statement audits, despite climate risk disclosures in the same entity's integrated report.

The FSCA's draft guidance on climate disclosure for financial institutions revealed that many South African banks and insurers had not yet developed climate risk assessment methodologies beyond high-level qualitative descriptions.

The JSE observed that mining companies' sustainability disclosures often focused on positive community investment stories rather than assessing negative impacts (pollution, displacement, health effects) through a structured materiality lens.

IRBA noted that the South African sustainability assurance market was concentrated among large audit firms, with limited capacity among mid-tier firms to provide assurance on complex sustainability topics.