Why Australian Businesses Can't Ignore AASB S2 Anymore

The Climate Reporting Moment Has Arrived

Australia's mandatory climate-related financial disclosures are no longer a distant prospect — they are law. The Treasury Laws Amendment (Financial Market Infrastructure and Other Measures) Act 2024 formally introduced AASB S2-aligned reporting obligations for large Australian entities.

For Group 1 entities (those with revenue ≥ $500M, assets ≥ $1B, or employees ≥ 500), the first reporting period is financial years commencing on or after 1 January 2025. Group 2 and 3 entities follow in subsequent years.

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What AASB S2 Actually Requires

AASB S2 is the Australian equivalent of IFRS S2. It mandates disclosure across four pillars:

1. Governance

Who on your board or executive team is responsible for climate risk oversight? You need documented processes — not just a vague policy statement.

2. Strategy

What are the climate risks and opportunities facing your business? Over what time horizons? You must conduct climate scenario analysis, including under a 1.5°C warming pathway.

3. Risk Management

How do you identify, assess, and manage climate-related risks — and how does this integrate with your existing enterprise risk management framework?

4. Metrics & Targets

You must disclose Scope 1, 2, and 3 greenhouse gas emissions in tCO₂-e. You need targets. You need to report progress.

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The Three Mistakes Businesses Are Making Right Now

Mistake 1: Treating it as a compliance exercise. AASB S2 disclosures will be read by investors, lenders, and customers. Companies that treat it as a tick-box exercise will produce disclosures that communicate risk — not capability.

Mistake 2: Starting with Scope 3 before getting Scope 1 and 2 right. I see organisations paralysed by Scope 3 complexity. Start with what you can control and measure. A credible Scope 1 and 2 inventory is the foundation everything else is built on.

Mistake 3: Leaving it to the sustainability team alone. AASB S2 is a financial reporting standard. The CFO, audit committee, and board must own this — not just the ESG team.

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What to Do This Quarter

• Conduct a gap assessment against the four AASB S2 pillars
• Establish a GHG inventory baseline for Scope 1 and 2 (at minimum)
• Map your board's climate governance structure — board charter updates may be needed
• Commission climate scenario analysis — a modular approach works fine for first-year reporters

At Apex Sustainability Institute, we work with businesses across each of these steps. The climate reporting era has arrived — but the organisations that treat it as a strategic opportunity rather than a compliance burden will come out ahead.

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Upekha Atupola is a PhD candidate at the University of Adelaide researching sustainability accounting, and a Member of the Chartered Institute of Management Accountants (CIMA). He is the lead course developer at Apex Sustainability Institute.