ISSB for Financial Institutions
Financial institutions face unique ISSB disclosure challenges — their primary climate risk is financed emissions (what they lend to and invest in) rather than their own operational emissions. IFRS S2 requires financial institutions to disclose climate risks across their entire balance sheet, making Category 15 Scope 3 the central disclosure.
Financial institutions face unique ISSB disclosure challenges — their primary climate risk is financed emissions (what they lend to and invest in) rather than their own operational emissions. For a bank, asset manager, or insurer, operational GHG emissions (Scope 1 and 2) are typically small — office buildings, data centres, and company vehicles.
Climate risk for financial institutions — the unique exposure profile
For a bank, asset manager, or insurer, operational GHG emissions (Scope 1 and 2) are typically small — office buildings, data centres, and company vehicles. The material climate risk lies in the financial institution's balance sheet — the companies and projects it lends to, invests in, or insures.
Transition risk on the asset side: loans and investments in high-emission sectors (fossil fuels, heavy industry, aviation, shipping) face devaluation as the low-carbon transition proceeds. Borrowers may default as carbon prices erode profitability; equity investments may decline as stranded assets are written down; bond portfolios may face credit rating downgrades.
Physical risk on the asset side: mortgage portfolios concentrated in flood-prone or coastal areas face collateral devaluation as physical climate risk materialises. Commercial real estate loans in water-stressed regions face asset value decline. Agricultural loans face credit risk as crop yields decline in climate-stressed regions.
Liability side risk for insurers: increasing frequency and severity of insured climate events (floods, wildfires, storms) increases claims costs. Availability and affordability of reinsurance in high-risk regions is declining — affecting underwriting profitability. Some markets face full insurance withdrawal.
IFRS S2 requirements specific to financial institutions
IFRS S2 requires financial institutions to disclose climate-related risks and opportunities using the same four-pillar structure as non-financial companies — but the content of each pillar differs significantly.
Gross exposure to carbon-related assets: IFRS S2 requires disclosure of the amount and percentage of assets financing carbon-related activities — fossil fuel companies, high-emission industries. This provides investors with a snapshot of transition risk concentration.
Scope 3 Category 15 (financed emissions): IFRS S2 requires Scope 3 GHG disclosure including financed emissions for financial institutions where these are material. The PCAF standard is the applicable methodology. Data quality scores must accompany the emission figures.
Portfolio climate scenario analysis: IFRS S2 requires financial institutions to assess the resilience of their lending and investment portfolios under climate scenarios. Tools include PACTA (Paris Agreement Capital Transition Assessment) for listed equity and corporate bonds; and physical risk overlays for real estate and infrastructure.
SASB industry-specific metrics: the SASB Commercial Banks standard, Asset Management & Custody Activities standard, and Insurance standard each include specific climate metrics — including financed emissions, fossil fuel sector exposure percentages, and climate-related insurance product metrics.
Net Zero Alliance commitments and IFRS S2
Several financial sector net zero alliances have emerged as vehicles for portfolio decarbonisation commitments — and their disclosure requirements align closely with IFRS S2.
Net Zero Banking Alliance (NZBA): Signatories commit to aligning their lending and investment portfolios with net zero by 2050, with interim sector-specific targets by 2030. NZBA requires annual disclosure of financed emissions, portfolio alignment metrics, and interim target progress — all consistent with IFRS S2 requirements.
Net Zero Asset Managers (NZAM): Signatories commit to supporting net zero by 2050 across their assets under management. Disclosure requirements include the proportion of AUM managed in line with net zero goals and interim targets — feeding into IFRS S2 strategy and metrics disclosures.
Net Zero Insurance Alliance (NZIA): Committed to transitioning underwriting portfolios to net zero — though the alliance faced significant challenges in 2023 with member withdrawals citing antitrust concerns.
For IFRS S2 reporters that are alliance members: alliance annual reporting requirements and IFRS S2 disclosures cover substantially the same ground. Prepare the IFRS S2 disclosure and use it to satisfy alliance reporting requirements simultaneously — minimising duplication.
Frequently asked questions
Does IFRS S2 require banks to disclose individual borrower climate risk?
No — IFRS S2 requires portfolio-level climate risk disclosure, not borrower-by-borrower disclosure. Aggregate sector exposures (e.g. total loans to oil and gas sector as a percentage of total loan book) and portfolio-level financed emission figures are required. Individual client data is protected by banking confidentiality.
How do asset managers calculate portfolio alignment with Paris Agreement?
The PACTA (Paris Agreement Capital Transition Assessment) tool, developed by the 2° Investing Initiative (2DII), calculates portfolio alignment for listed equity and corporate bonds by comparing portfolio exposure to high-emission sectors against IEA NZE sector pathways. PACTA is free and widely used. The Transition Pathway Initiative (TPI) provides company-level management quality and carbon performance assessments that feed into portfolio alignment analysis.
Does IFRS S2 apply to private equity funds?
IFRS S2 applies to entities that prepare general purpose financial reports — including private equity fund managers that report to investors. PE fund managers with ISSB-adopting jurisdiction reporting obligations must disclose climate risks including financed emissions from their portfolio companies. The PCAF private equity methodology provides the applicable calculation approach.