Mandatory Climate Disclosure in Australia: AASB S1/S2 Complete Guide

Australia's mandatory climate disclosure regime represents the most significant reporting reform since IFRS adoption. The Treasury Laws Amendment (Financial Market Infrastructure and Other Measures) Act 2024 requires large entities to report climate-related financial risks using standards aligned with the ISSB framework, starting from 1 January 2025 for Group 1 entities.

For financial services firms - banks, insurers, super funds, and asset managers - this is not optional. APRA-regulated entities overwhelmingly fall into Group 1 or Group 2, meaning disclosure obligations are already live or imminent.

The Legislative Framework

The Act amends the Corporations Act 2001 to require sustainability reports as part of annual financial reporting. These reports must comply with sustainability standards issued by the AASB, which has adopted two standards based on the ISSB baseline:

• AASB S1 - General Requirements for Disclosure of Sustainability-related Financial Information
• AASB S2 - Climate-related Disclosures

The regime applies to reporting entities meeting size thresholds, phased across three groups. Sustainability reports must be lodged with ASIC alongside annual financial reports and are subject to director sign-off and assurance.

AASB S1: General Sustainability Requirements

AASB S1 establishes the overarching framework. It requires entities to disclose material information about sustainability-related risks and opportunities that could reasonably be expected to affect the entity's cash flows, access to finance, or cost of capital over the short, medium, and long term.

• Connected information - sustainability disclosures must be integrated with financial statements, not treated as a standalone exercise
• Materiality - aligned with AASB/IFRS financial reporting materiality (investor-focused, not double materiality)
• Reporting period - must match the entity's financial reporting period
• Comparative information - prior period comparatives required (with transitional relief in year one)

AASB S2: Climate-related Disclosures

AASB S2 is the centrepiece - structured around the four TCFD pillars that compliance teams will recognise from APRA's CPG 229 guidance:

1. Governance

Disclose the governance processes, controls, and procedures used to monitor and manage climate-related risks and opportunities. This includes board oversight, management roles, and how climate is integrated into strategy, risk management, and remuneration.

2. Strategy

Describe climate-related risks and opportunities that could reasonably be expected to affect the entity's prospects. Entities must disclose the current and anticipated effects on business model, value chain, financial position, and financial performance. Critically, AASB S2 requires climate scenario analysis - including a scenario consistent with 1.5 degrees C warming.

3. Risk Management

Explain how climate-related risks are identified, assessed, prioritised, and monitored. Disclose integration with overall enterprise risk management. For APRA-regulated entities, this must align with the existing RMF under CPS 220.

4. Metrics and Targets

Quantitative disclosures including GHG emissions (Scope 1, 2, and 3), industry-specific metrics, internal carbon prices, and climate-related targets with progress tracking.

Entity Thresholds and Phased Timeline

Most APRA-regulated ADIs, general insurers, life insurers, and RSE licensees qualify as Group 1 or Group 2. Smaller credit unions and friendly societies may fall into Group 3.

Scope 1, 2, and 3 Emissions Reporting

GHG emissions disclosure follows the GHG Protocol classification and must be measured in CO2-equivalent tonnes:

• Scope 1 - Direct emissions from owned or controlled sources (fleet vehicles, on-site generators, fugitive emissions)
• Scope 2 - Indirect emissions from purchased electricity, heating, and cooling
• Scope 3 - All other indirect emissions across the value chain, including financed emissions (Category 15 for banks and investors)

For financial institutions, Scope 3 Category 15 (financed emissions) is the dominant category - often representing 95%+ of total emissions. This includes emissions attributable to lending portfolios, investment holdings, and underwriting activities. Measurement methodologies from PCAF (Partnership for Carbon Accounting Financials) are the de facto standard.

Safe Harbour Provisions

Parliament included significant protections recognising the difficulty of forward-looking climate disclosures:

• Scope 3 emissions - protected from private litigation (not ASIC enforcement) for the first three reporting periods after the entity's Scope 3 obligation commences
• Transition plans and scenario analysis - protected from private litigation where prepared in good faith and on reasonable grounds
• Forward-looking statements - general safe harbour for forward-looking climate statements made in good faith

These provisions do not protect against ASIC regulatory action, misleading or deceptive conduct claims, or bad faith disclosures. Compliance teams must still ensure disclosures are defensible.

Assurance Requirements

Sustainability reports must be independently assured, with a phased ramp-up from limited to reasonable assurance:

• Year 1 - Limited assurance over Scope 1 and Scope 2 emissions, and governance disclosures
• Years 2-3 - Limited assurance extends to additional metrics and Scope 3 (when required)
• From FY2030 - Reasonable assurance required (equivalent to financial statement audit level)

Assurance must be provided by a registered assurance practitioner under AUASB ASSA 5010. Existing financial auditors can perform sustainability assurance, but specialist climate expertise is increasingly expected.

Intersection with APRA Prudential Standards

Financial services entities face overlapping obligations. AASB S2 disclosures must be consistent with:

• CPG 229 - APRA's climate risk practice guide (governance, strategy, risk management, metrics)
• CPS 220 - Risk management framework must incorporate climate as a material risk
• CPS 230 - Climate-related operational disruptions and supply chain risks
• SPS 530 - Superannuation investment governance must consider climate risks to member outcomes

APRA has signalled it will use AASB S2 disclosures as supervisory inputs, reinforcing the need for accuracy and board-level ownership.

Greenwashing Enforcement Risk

ASIC has made greenwashing a top enforcement priority. Since 2023, ASIC has issued multiple infringement notices and commenced civil penalty proceedings against entities making misleading sustainability claims. Mandatory disclosure under AASB S2 raises the stakes - any inconsistency between public marketing claims and regulated disclosures creates immediate enforcement exposure.

Entities should ensure their sustainability reports, product disclosure statements, and marketing materials tell a consistent story. GoComply's cross-document scanning helps identify these inconsistencies before regulators do.

How GoComply Helps

GoComply's compliance scanner identifies gaps in your climate risk documentation against both AASB S2 requirements and APRA's prudential expectations:

• Automated gap analysis - Upload your climate risk policy, TCFD report, or sustainability disclosures and get instant findings mapped to CPG 229 and AASB S2 pillars
• Governance checks - Flags missing board oversight provisions, management accountability, and remuneration linkage
• Metrics validation - Identifies whether Scope 1/2/3 measurement methodologies and targets are adequately documented
• Cross-regulation mapping - Surfaces conflicts or gaps between your climate disclosures and CPS 220, CPS 230, and FAR obligations

This guide is for informational purposes and does not constitute legal advice. Consult qualified compliance professionals for specific obligations. GoComply scans against 150 compliance rules across 142 regulations, powered by 153 regulatory sources - view plans or try a free scan.