The Mandatory Climate Scenario Analysis under AASB S2: Practical Implementation and Financial Integration

The mandatory climate reporting in Australia is a paradigm shift in corporate disclosures. Climate risk has become part of statutory financial disclosure requirements with the introduction of the AASB S2 Climate-related Disclosures or the Australian Sustainability Reporting Standards (ASRS), as they are called. With a rapidly evolving regulatory landscape, organisations need to do more than just catch the leading narratives on ESG and adopt systematic and proactive strategies to grasp climate-related financial risks. Climate scenario analysis is one of the vital tools in this transformation, assisting businesses to gauge uncertainty, quantify impacts, and strengthen strategic resilience. Expectations continue to shift as organisations move to include climate considerations in risk management and financial planning, with climate change now considered a core financial and strategic problem.

Climate scenario analysis is a systematic process that can be used to understand how different climate futures will impact an organisation’s operations, assets and finances. It is not like traditional forecasting which assumes only a single track based on various levels of global warming and policy intervention; it enables organisations to examine a range of risks and opportunities. This helps companies understand the financial impact that climate change poses and to perform detailed risk assessments and be prepared with the mitigation strategies to reduce the impact of climate change.

Regulatory Context: AASB S2 and Mandatory Climate Disclosures

The AASB S2 requires organisations to disclose climate-related risks and opportunities that could have a material impact on financial performance, within the context of standard annual reporting, and in accordance with IFRS S2, the internationally recognised disclosure framework.

The standard is built around four core pillars:

Governance
Strategy
Risk Management
Metrics and Targets

Organisations need to establish criteria for identifying, measuring, and responding to climate risks and their implications for business planning and strategy. Significantly, climate scenario analysis requires companies to prove business model resilience. This allows companies to not just report passively on the bygone year’s performance but also plan based on the different climate scenarios. It adds more value for the companies as this exercise will give them an idea of how risk-prone their business(es) is/are to climate change and help them explore new business opportunities proactively.

What is Scenario Analysis?

It’s a structured way to test how your strategy performs under different plausible climate futures. It’s not forecasting; it’s exploring ‘what if’ scenarios.

Organisations are supposed to apply two or more climate scenarios, which are usually in line with global temperature trajectories.

Typically, the scenarios include:

Low-warming scenario (1.5°C pathway)

Aligned with the Paris Agreement. This assumes rapid decarbonisation, stringent regulations, carbon pricing, and renewable energy transition.

Question to explore: ‘If the world achieves net zero by 2050, how does our business perform? Do we face stranded assets? Regulatory costs? New opportunities?’

2. High-warming scenario (>2°C pathway)

Assumes slower policy action, continued fossil fuel use, significant physical climate impacts.

Question to explore: ‘If global temperatures rise 3-4°C, what physical risks do our operations face? Supply chain disruptions? Asset damage?’

Both scenarios offer a unique perspective with which organisations can evaluate the effects on operations, assets, and financial performance.

How to Perform the Climate Risk Scenario Analysis?

The first step is to identify climate risks and opportunities at operations, assets, and value chains. These are physical risks (adverse weather conditions) and transition risks (regulatory and market changes).

The second step is to choose the right scenarios. These scenarios should be representative of a range of scenarios that could occur and should be consistent with regulatory expectations.

Next, possible impacts of each scenario are analysed by organisations on business operations and asset performance. This includes the evaluation of exposure, vulnerability, and adaptive capacity.

The fourth step is to measure financial impacts. This includes forecasting the impacts of climate risks in terms of financial losses, such as revenue, costs, asset value, and expenditure.

Lastly, the learnings should be integrated into the corporate business plan, risk management, and governance processes for informed decision-making. Essentially, the non-financial risks should be treated the same way as the Organisation would treat its financial risks – in terms of prioritisation, mitigation strategies, and reporting.

Climate Risks and Opportunities

The risks are divided into two major categories – Physical and Transition risks. The Physical risks are further divided into Acute or Chronic risks.

Physical Risks

These are the direct impacts of climate change on your business. They can be among the following:

Acute events: Cyclones, floods, bushfires, and extreme heat events that damage assets or disrupt operations
Chronic changes: Sea level rise, changing rainfall patterns, and temperature shifts affecting long-term operations

Transition Risks

These arise from the shift to a low-carbon economy and can be of the below-mentioned nature:

Policy risks: Carbon pricing, emissions regulations, renewable energy mandates
Technology risks: Emergence of low-carbon alternatives making your products obsolete
Market risks: Changing customer preferences, supply chain requirements
Reputation risks: Stakeholder perception of your climate performance

Opportunities

Once the climate threats to the business are evaluated, it is only meaningful to analyse if climate change offers any new business opportunities too. The companies can evaluate new products or services (e.g., renewable energy, climate adaptation solutions), access to new markets (e.g., green bonds, ESG-focused investors), enhanced resilience through adaptation, improved efficiency through emissions reduction, etc.

The companies must explain how these risks and opportunities affect their business model, value chain, strategy, and financial planning across short (0-2 years), medium (2-5 years), and long-term (5+ years) horizons. This is most important since the Pillar 3 of the AASB S2 focuses on the processes, not just the outcomes, of how companies manage climate risks.

Databases / Frameworks used for Scenario Analysis?

While this process may sound very daunting, it is quite logical. Once the risks are analysed and scenarios established, the next step is just the extrapolation. The key to successful climate scenario analysis is the combination of various globally established frameworks, some of which are mentioned below:

The Intergovernmental Panel on Climate Change (IPCC) provides the scientific climate pathways and data that are used to assess physical risks through extreme weather events, increasing temperature, and increasing sea level. IPCC pathway – RCP 2.6 can be used for 1.5°C, while RCP 8.5 can be used for high warming.
The International Energy Agency’s (IEA) core scenarios map out different possible futures for the global energy system depending on government policies and climate targets. The IEA scenarios show how global energy demand and emissions will change based on how aggressively governments act on climate change, ranging from a business-as-usual path with current policies to an aggressive roadmap for reaching global net-zero emissions by 2050.
Organisations can use economic and financial scenarios, including orderly, disorderly, and high-emission scenarios, offered by the Network of Greening the Financial System (NGFS), to analyse transition risks.
The Task Force on Climate-related Financial Disclosures (TCFD) provides the general governance and disclosure framework, which has been directly incorporated into AASB S2.

These are some of the credible databases / frameworks that enable organisations to conduct a comprehensive, credible, and comparable climate scenario analysis without having to reinvent the wheel.

Real Estate Sector Spotlight

A good example of real-world implementation of a climate scenario analysis is the real estate industry, which is both physically and transitionally vulnerable.

Practical Example: Climate Scenario Analysis of an Australian property developer

ABC Holdings is a long-running and large developing Australian company with several land holdings.

Physical risks to a developer of this scale would be related to coastal flooding, sea level rise, and heat stress on building performance and durability. Other transition risk factors include increased regulatory requirements for building codes, shifting energy efficiency regulations, and increased investment and tenant demand for sustainable buildings.

In low warming scenarios, rapid decarbonisation increases the compliance costs but increases the value of the assets and demand for green certified developments in the long term. An extreme warming scenario leads to high-risk areas being exposed to extreme weather events, to a rise in insurance premiums, and to a decline in the value of assets. They impact both revenue and asset values, CAPEX, and project timelines.

Proactively developing resilience is achieved through geographically diversifying, investing in climate-resilient infrastructure, the use of sustainable building practices, and incorporating climate risk into investment decisions.

Key Challenges for Australian Businesses

One of the limitations is the lack of data, especially at the asset level. There are expertise gaps to overcome between climate science and financial modelling that organisations need to address, as well as changing regulatory needs and exposures to different sectors. Regulatory requirements are dynamic, with uncertainty in terms of disclosure requirements and practices. Every industry is exposed on a different level, and it will be essential to undertake a different approach to scenario analysis.

Beginning early is a good idea, as scenario analysis is data-intensive and cross-functional coordination is required. Compliance is not the only driver for scenario analysis; it’s also a strategic tool for managing uncertainty and sustainable growth.

Conclusion

Climate scenario analysis is a critical field for organisations to understand and apply to manage the challenges of climate-related financial risks and long-term strategic planning. The AASB S2 is changing the way that Australian organisations respond to climate risk and has made it a central part of financial reporting. Through systematic scenario analysis and solid frameworks, companies can enhance their disclosures, boost their resilience, and make better decisions in today’s complex and volatile world.

Climate scenario analysis is playing a key role in corporate governance and is becoming a mandatory reporting practice under regulatory frameworks worldwide. Besides the regulatory compliance, having climate scenario analysis as part of an organisation’s governance structure increases the likelihood of detecting climate risks and capturing new climate opportunities in a low-carbon economy. As the risks climate change poses are increasingly evident, the use of climate scenario analysis will be progressively vital to the board and executives for making informed, proactive decisions. Finally, climate scenario analysis can help organisations prepare for the future, show accountability to stakeholders, and play a meaningful role in the global climate goals.

FAQs

What is climate scenario analysis?

It evaluates the financial impact and operations of different climate futures. It’s a structured way to test how your strategy performs under different plausible climate futures. It’s NOT forecasting, it’s exploring ‘what if’ scenarios.

Which are the five steps of scenario planning?

Determine risks and opportunities, choose scenarios, evaluate effects, measure financial consequences and incorporate into strategy.

What is scenario analysis in sustainability?

The assessment evaluates environmental factors that may affect the business’ long-term performance.

How to perform climate risk scenario analysis?

Do a risk assessment, measurement of impacts, and embed the results into the strategy.