What AASB S2 actually is
AASB S2 is Australia's mandatory climate-related financial disclosure standard, administered by ASIC. It is not a voluntary ESG report. It sits inside your annual financial report and is subject to the same financial-reporting oversight under the Corporations Act.
Who is caught
You are a Group 2 entity if any one of the following is true (on a consolidated group basis):
- You lodge NGER reports with the Clean Energy Regulator. Any size. Automatic.
- You meet two of three thresholds: consolidated revenue $200m to $499m, consolidated gross assets $500m to $999m, or 250 to 499 employees.
- You are the parent of a Group 1 or Group 2 entity, regardless of your own size.
Group 3 entities follow from 1 July 2027.
The four disclosure pillars
Metrics & Targets Hard 1 July 2026
Scope 1, 2 and (with grace period) Scope 3 emissions. Continuous data capture. Must not be backdated.
Governance
Board oversight, executive accountability, climate risk owner. Can mature during reporting period.
Strategy
Scenario analysis, transition plan, business resilience. Can develop in parallel.
Risk Management
Physical and transition risk identification, integration with enterprise risk. Can mature post-deadline.
Only one pillar (Metrics & Targets) depends on operational data capture from day one. The other three can develop during the reporting period.
What must be live before 1 July 2026
- Scope 1 + 2 data sources locked down. Fuel records, power bills, refrigerant logs. From day one, every litre, kWh and kilogram must be traceable to a primary record.
- Scope 3 baseline methodology chosen. The one-year grace period is a trap if supplier engagement has not started. Pick the approach and document it.
- Initial climate risk owner appointed. Board minutes must show accountability before reporting begins, even if frameworks mature later.
What you can develop during the reporting period
- Full board governance framework and policies.
- Scenario analysis and transition strategy.
- Detailed risk register and integration with ERM.
- Disclosure assembly and assurance preparation (first disclosure due ~October 2027).
Three common mistakes
- Starting with the report, not the data. No data = no report. Operationalise capture first.
- Treating Scope 3 grace period as a 12-month holiday. Supplier engagement takes months.
- Hiring a Big-Four advisory for a mid-market problem. Different scale, different cost, different timeline.
Information only, not advice. General information about AASB S2 and operational preparation steps. Not legal, financial, accounting, audit, or investment advice. Obligations depend on your entity's structure. Confirm with your legal advisor, auditor, and accountant. Aethiro Pty Ltd (ABN 69 683 331 919) does not provide legal, financial, or assurance services. Methodology aligned with ISO 14064 verification rigour; lead trained at TÜV SÜD.