Australia’s climate reporting shift: What finance leaders need to know now

Climate reporting in Australia has moved from “nice to have” commentary to a statutory requirement. The passage of the Treasury Laws Amendment (Financial Market Infrastructure and Other Measures) Bill 2024  means climate‑related financial disclosures now sit inside the Corporations Act 2001, and must be prepared with the same discipline as financial statements.

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For many organisations, this is a fundamental shift. Climate data is no longer a glossy sustainability add‑on; it becomes part of the annual reporting cycle, with clear ownership, documented methods, and evidence that can withstand audit review. Australia is transitioning from voluntary, narrative‑driven ESG reporting to mandatory, auditable disclosures aligned with financial close.

If you’re still getting your bearings on how this mandate works in practice, we’ve also broken down the five biggest misconceptions about climate reporting – and what the rules actually require.

Who needs to report – and when?

The mandate is phased, grouping entities based on size, National Greenhouse and Energy Reporting (NGER) status, and asset value. Compliance starts in the first financial year beginning on or after the dates below:

• Group 1: 1 January 2025 – largest reporters (revenue ≥ $500m; assets ≥ $1b; employees >500) or NGER reporters above the publication threshold.
• Group 2: 1 July 2026 – medium‑large reporters (revenue ≥ $200m; assets ≥ $500m; employees >250) and all other NGER reporters.
• Group 3: 1 July 2027 – mid‑sized entities (revenue ≥ $50m; assets ≥ $25m; employees >100). Some may lodge simplified disclosures if they identify no material climate‑related risks or opportunities.

These dates matter because climate disclosures must be released simultaneously with the financial statements and cover the same reporting entity and period.

What the climate disclosures cover

Australia’s requirements follow the AASB’s climate‑related disclosure standards. Reporting spans:

• Governance: how boards and management oversee climate risks.
• Strategy: how climate risks and opportunities affect business models and plans.
• Risk management: how risks are identified, assessed, and managed.
• Metrics and targets: what’s measured and tracked over time.

This is a significant step up from voluntary sustainability commentary. Entities must maintain evidence, uphold methodology discipline, and embed the disclosures in established reporting workflows.

If you want to understand when your organisation enters the regime, our explainer on Groups 1, 2 and 3 walks through the start dates and eligibility in a simple, high-level framework.

Why finance leaders are now at the centre

Because climate disclosures fall within statutory reporting, CFOs and controllers become accountable for their accuracy. Directors must issue a declaration for the Sustainability Report, supported by reasonable steps in the early years of the regime.

Audit scrutiny will increase over time following a phased‑in assurance model and a three‑year modified liability period.

The sustainability report must meet the same standard of control as the financials, and auditors expect clear line‑of‑sight from inputs to disclosure.

Why teams can’t rely on manual processes

Many statutory reporting teams already feel the strain of spreadsheet‑led workflows. Climate reporting magnifies these risks. The data comes from more places, changes more often, and demands evidence that ties every number back to a traceable source. When spreadsheets sit at the centre, it’s hard to maintain version control, show consistent methods or defend figures during audit.

The sustainability report must meet the same standard of control as the financials, and auditors expect a clear line of sight from inputs to disclosure. Manual processes make that level of assurance difficult – and even harder to repeat under pressure. Teams that start strengthening their data foundations now will be in a far better position when audit scrutiny increases.

What’s coming next

You don’t need to solve everything at once, but understanding the scope of the mandate and how it connects to your statutory responsibilities is the right place to start. As expectations grow and assurance requirements evolve, the organisations that strengthen their data foundations and reporting processes now will be better positioned to navigate their first climate reporting cycle with confidence.