Physical climate risk data,
ready for AASB S2.
AASB S2 makes climate disclosure mandatory under the Corporations Act 2001, and most of it reads like TCFD. Two demands don't: dual-scenario analysis at 1.5°C and beyond 2°C, and the financial effects of both. Neither survives on narrative.
AASB S2 is Australia's mandatory climate disclosure standard. It imports IFRS S2 wholesale, then layers in 'Aus'-prefixed paragraphs that mandate dual-scenario analysis (1.5°C AND exceeding 2°C) and the financial effects of both.
Australian for-profit entities meeting Group 1, 2 or 3 thresholds under the Corporations Act 2001 (large entities, NGER reporters, and asset owners over $5bn). Group 1 has reported since FY2025. Group 2 (two of: 250 employees, $500m gross assets, $200m revenue) commenced 1 July 2026, and Group 3 follows from 1 July 2027. Lodged with ASIC alongside the annual report.
AASB S2 is the rulebook. The Corporations Act is the law.
The Treasury Laws Amendment (Financial Market Infrastructure and Other Measures) Act 2024 inserted mandatory climate disclosures into Chapter 2M of the Corporations Act 2001. AASB S2 specifies what to disclose, ASIC supervises through RG 280, and AUASB's ASSA 5000/5010 set the assurance bar. Three reporting groups phase in over three years, and two of the three are now inside the regime.
AASB S2 didn't soften IFRS S2. It sharpened it.
Australia took the global baseline and added two demands that no narrative can survive: dual scenarios, and the financial effects of both. The first wave of reports has now shown where that bites, and ASIC has said so in writing.
Two pathways. Quantified at both.
Where IFRS S2 leaves scenario choice flexible, AASB S2 paragraph AusB1 mandates two: a 1.5°C-aligned pathway and one exceeding 2°C. Hand-waving narratives don't satisfy this, and scenario analysis enters limited assurance from year two, so the working has to be defensible rather than described.
Past storms, future silence.
In its 18 May 2026 observations, ASIC found entities that had disclosed the financial impact of past extreme weather, then failed to carry that forward into the risks and mitigations affecting their prospects. Australia's National Climate Risk Assessment is publicly available, so the information is there to be used.
Asset-level, or assurance-fail.
ASSA 5000 / 5010 phases limited assurance from year one to reasonable assurance by FY2030. Asset-level exposure across material physical operations, not country averages or postcode-level proxies, is what makes it through audit and what underwrites a costed adaptation case afterwards.
The AASB S2 framework: one law, one standard, four pillars, two assurance steps.
AASB S2 is structurally simple compared to ESRS: a single mandatory standard built on TCFD's four pillars. The complexity sits underneath, in the legislative architecture (Corporations Act, ASIC RG 280), the Australian-specific paragraphs, the assurance pathway, and the Group thresholds that decide who reports when. Click each section to unpack what's actually required.
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Chapter 1: Legislation & architecture
The legislative spine.
The Treasury Laws Amendment Act 2024 inserted mandatory climate disclosures into Chapter 2M of the Corporations Act. ASIC supervises through Regulatory Guide 280, published 31 March 2025, with three reporting groups phased over three years.
- Group 1: financial years from 1 January 2025. Two of 500 employees, $1bn gross assets, $500m revenue, plus NGER reporters and asset owners over $5bn
- Group 2: commenced 1 July 2026. Two of 250 employees, $500m gross assets, $200m revenue
- Group 3: from 1 July 2027. Two of 100 employees, $25m gross assets, $50m revenue
- Sustainability Report lodged with ASIC alongside the annual report, with a directors' declaration on AASB S2 compliance
- Modified liability for Scope 3, scenario analysis and transition plan statements runs 1 January 2025 to 31 December 2027, with only ASIC able to act during that window
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Chapter 2: AASB S2 General Requirements
The standard, with Australian fingerprints.
AASB S2 imports IFRS S2 wholesale, then layers in 'Aus'-prefixed paragraphs for Australian-specific requirements. Appendix D imports the climate-relevant subset of IFRS S1 so that an entity applying AASB S2 alone has the general requirements covered.
- Modelled on IFRS S2 (ISSB), structured around TCFD's four pillars
- 'Aus' paragraphs for legislative commencement, dual scenarios and Australian context
- Material climate-related risks and opportunities affecting cash flows, finance access, cost of capital
- Time horizons: short, medium, long-term, defined by the entity
- AASB 2025-1 (December 2025) eased financed-emissions scope, industry classification and NGER overlap. No 2026 amending standard has touched S1 or S2
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Chapter 3: AASB S2 Governance
Who watches climate risk, and how.
Paragraph 6 of AASB S2 sets out the governance disclosures: board oversight, management's role, and how climate is integrated into existing controls. Limited assurance applies from year one, so this gets read carefully by auditors first.
- Board and committee oversight processes for climate risks and opportunities
- Skills, experience and access to expertise on climate at the governance level
- Management's role in assessing, monitoring and managing climate risks
- Frequency of climate-related reporting to the board
- Subject to limited assurance from year one under ASSA 5010
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Chapter 4: AASB S2 Strategy
From hazard to financial effect, by scenario.
This is the hard pillar. Australian-specific paragraphs require dual-scenario climate resilience analysis (1.5°C and a pathway exceeding 2°C), and the anticipated financial effects of those scenarios on the entity's prospects. PwC's review of 22 first-wave ASX reporters found roughly two thirds attempted quantification, with the rest leaning on measurement uncertainty.
- Material climate-related risks and opportunities, classified as physical or transition
- Climate Resilience Assessment using two pathways: 1.5°C-aligned AND exceeding 2°C
- Current and anticipated financial effects across short, medium and long-term horizons
- Adaptation and mitigation actions, with the capex and financial planning that sit behind them
- Asset-level analysis where geography and exposure are material to cash flows
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Chapter 5: AASB S2 Risk Management
How risks are identified, prioritised and integrated.
Process disclosures around how climate is woven into the entity's overall risk framework. ASIC has been explicit that entities should use the reasonable and supportable information available to them, which now includes Australia's National Climate Risk Assessment and its ten priority hazards.
- Processes for identifying and assessing climate-related risks and opportunities
- Inputs and parameters used: data sources, scope of operations, value-chain coverage
- Past events and current conditions, including prior extreme weather losses, carried through into forward-looking risk
- Priority of climate risks within the overall enterprise risk management framework
- Monitoring, escalation and review cycles, with linkage to internal audit. For APRA-regulated entities this dovetails with CPG 229
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Chapter 6: AASB S2 Metrics & Targets
The vulnerability metric, and the emissions ones.
The cross-industry metrics are wider than emissions. Paragraph 29 requires the amount and percentage of assets or business activities vulnerable to physical climate risk, and that number is only as good as the asset-level exposure data behind it.
- Amount and percentage of assets or business activities vulnerable to physical climate risks, split by acute and chronic where material
- Capital deployed toward climate risk and opportunity, including adaptation spend
- Scope 1 and 2: gross GHG emissions in tCO2e from year one, location-based
- Scope 3: from year two, considering all 15 GHG Protocol categories
- NGER methodology accepted for NGER-reporting facilities, with financed-emissions relief under AASB 2025-1 for banks and insurers
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Chapter 7: ASSA 5000 / 5010 & ASIC lodgement
From draft to assured filing.
AUASB-issued ASSA 5000 (general assurance requirements) and ASSA 5010 (the phasing) stage limited assurance from year one, widening to scenario analysis and transition plans in year two, and scaling to full reasonable assurance for financial years commencing on or after 1 July 2030.
- Year 1: limited assurance on governance and Scope 1 / 2 emissions. Scenario analysis is not assured
- Year 2: limited assurance widens to scenario analysis, transition plans, risk management and Scope 3
- From FY2030: reasonable assurance across the entire Sustainability Report
- The financial statement auditor must also assure the sustainability report, supported by climate experts
- All 22 first-wave ASX reporters PwC reviewed received unqualified limited assurance opinions
Climate risk just became an audited disclosure.
Asset-level physical risk, dual scenarios, quantified financial effects, audit-grade methodology. The same data spine carries every component of the Sustainability Report and the climate resilience case to investors.
Anticipated financial effects
Material climate-related risks and opportunities, with current and anticipated financial effects across short, medium and long-term horizons. Qualitative is permitted, but ASIC has warned against disclaimers and unexplained measurement uncertainty standing in for the number.
Asset-level physical climate risk
Property-by-property exposure across real estate, supply chain nodes and operational facilities. Country averages won't survive ASSA 5000 limited assurance, and they won't underwrite a credible adaptation plan.
Dual scenarios: 1.5°C and beyond 2°C
AASB S2 paragraph AusB1 mandates two scenarios for the climate resilience assessment. Both pathways must be applied to every material climate-related risk and opportunity. Single-scenario stress tests don't comply.
Audit-grade methodology
Limited assurance from year one across governance and Scope 1 / 2 emissions, widening to scenario analysis in year two. Reasonable assurance from FY2030 across the full Sustainability Report. Every model, proxy and assumption must be defensible.
Physical climate risk data, built for AASB S2 disclosure.
Spectra is the physical climate risk data platform behind AASB S2 disclosures at banks, insurers, asset managers, super funds and real estate firms with over $13.5 trillion in combined AUM. Asset-level exposure, dual-scenario coverage, audit-ready methodology, and the adaptation case that follows.
Asset-level exposure, 2bn+ assets
Material physical climate risk for every asset in scope. 12 hazards, building-level vulnerability, geolocation precision. The granularity ASSA 5000 limited assurance expects, without postcode proxies.
Both pathways AusB1 mandates
CMIP6 SSPs and CMIP5 RCPs covering a 1.5°C-aligned pathway and one exceeding 2°C. Short, medium and long-term horizons in 5 to 10 year intervals to 2100. Every material risk modelled under both.
Hazard exposure to financial effect
Annual losses in monetary value and percentage, business disruption risk and confidence intervals. The translation from physical hazard to anticipated financial effect that AASB S2 paragraph 22 requires.
The paragraph 29 vulnerability metric
Amount and percentage of assets and business activities vulnerable to physical climate risk, computed from asset-level exposure rather than estimated at portfolio level. The cross-industry metric with the longest data tail.
Adaptation, costed
Adapt ranks resilience measures asset by asset and prices the avoided loss against the capex, so the adaptation and capital-deployment disclosures rest on the same numbers as the risk itself.
ASSA-ready by design
Model risk management aligned, ISO 27001 and ISO 14001 certified, full methodology documentation. Defensible to limited assurance now, and to reasonable assurance from FY2030.
Are you ready for AASB S2 climate disclosure?
Pick your industry. The financial-effects question tailors itself to where physical climate risk hits your sector hardest under both required pathways.
AASB S2 readiness self-check
AASB S2 physical climate risk: the questions buyers actually ask.
What is AASB S2?
AASB S2 is the Australian Sustainability Reporting Standard for climate-related disclosures. It is the mandatory climate disclosure standard issued by the Australian Accounting Standards Board, modelled on IFRS S2 (ISSB) and built around the four TCFD pillars: governance, strategy, risk management, and metrics and targets. Australian-specific paragraphs add dual-scenario climate resilience analysis and the anticipated financial effects of physical and transition risk on the entity's prospects.
Who has to report under AASB S2, and when?
Australian for-profit entities meeting Group 1, 2 or 3 thresholds under the Corporations Act 2001. Group 1 (two of 500 employees, $1bn gross assets or $500m revenue, plus NGER reporters and asset owners over $5 billion) has reported for financial years beginning on or after 1 January 2025. Group 2 (two of 250 employees, $500m gross assets or $200m revenue) commenced 1 July 2026 and is reporting now. Group 3 (two of 100 employees, $25m gross assets or $50m revenue) follows from 1 July 2027. The Sustainability Report is lodged with ASIC alongside the annual report, with a directors' declaration on AASB S2 compliance.
What did ASIC say about the first wave of reports?
ASIC published early observations on 18 May 2026, drawn from 259 sustainability reports lodged for the financial year ending 31 December 2025. It found disclosure had improved on voluntary practice, but flagged several recurring problems: disclaimers that conflict with the objectives of Chapter 2M, judgements and measurement uncertainty that were not clearly disclosed, and voluntary content obscuring the mandatory disclosures. On risk identification, ASIC noted entities that had disclosed the financial impact of past extreme weather events and then failed to identify the corresponding forward-looking risks or mitigations. Full findings are due in the second half of 2026.
What are AASB S2's dual scenario requirements?
AASB S2 paragraph AusB1 mandates climate resilience analysis under at least two scenarios: one consistent with limiting global warming to 1.5°C, and one with significantly higher warming exceeding 2°C. This goes beyond IFRS S2's flexible scenario approach. In practice this means CMIP6 SSPs (typically SSP1-1.9 or SSP1-2.6 for 1.5°C, SSP3-7.0 or SSP5-8.5 for the high-warming pathway) or CMIP5 RCP equivalents. Both pathways must be applied to every material climate-related risk and opportunity. Scenario analysis is not assured in year one, but enters limited assurance from year two under ASSA 5010.
What are anticipated financial effects under AASB S2?
Anticipated financial effects are the expected impact of material climate-related risks and opportunities on the entity's financial position, performance and cash flows across short, medium and long-term horizons. AASB S2 permits qualitative disclosure where quantification is not yet possible, but ASIC expects the judgements and measurement uncertainty behind that choice to be disclosed clearly. PwC's review of 22 first-wave ASX reporters found roughly two thirds had quantified. For physical risk, quantification means translating asset-level hazard exposure into monetary impact under both required scenarios.
Does the National Climate Risk Assessment affect AASB S2 reporting?
Not directly, but it raises the bar on what counts as reasonable and supportable information. Published on 15 September 2025 alongside the National Adaptation Plan, the assessment identifies 63 nationally significant climate risks across eight systems, with ten priority hazards spanning flooding, bushfire, tropical cyclone, coastal erosion, drought and extreme heat, assessed at 1.5°C, 2°C and 3°C of warming. It rates near-term risk as moderate to high across every system, rising to very high or severe by 2050. Because it is publicly available without undue cost or effort, an entity that identifies no material physical risk now has more explaining to do.
How does adaptation fit into AASB S2?
Through the strategy and metrics pillars. AASB S2 asks how an entity is responding to the climate risks it has identified, including adaptation and mitigation actions and the capital deployed toward them, and paragraph 29 requires the amount and percentage of assets or business activities vulnerable to physical climate risk. Disclosing exposure without a response is the weakest version of the disclosure; the stronger one prices the resilience measure against the loss it avoids, asset by asset, which is what Adapt is built to do.
How does Climate X help with AASB S2?
Climate X provides asset-level physical climate risk data for AASB S2 disclosures via Spectra. The platform delivers exposure across 12 hazards for over 2 billion assets, dual scenario coverage spanning CMIP6 SSPs and CMIP5 RCPs to 2100 (satisfying paragraph AusB1), financial impact translation in monetary value, the paragraph 29 vulnerability metric, and full methodology documentation defensible to limited assurance now and reasonable assurance from FY2030. Adapt costs the resilience measures that follow. Used by Australian and global financial institutions managing over $13.5 trillion in combined AUM. Explore Spectra or book a demo.
From hazard to financial effect.
Asset-level physical climate risk and adaptation data, ready for AASB S2 dual-scenario disclosure and the resilience case downstream.
