Australian accountants are playing an increasingly central role in helping clients navigate the new era of mandatory climate-related financial disclosures. With AASB S2 requirements now in force for large entities from financial years beginning on or after 1 January 2025, many practices are integrating sustainability risks directly into financial planning, governance structures and internal control systems.
This practical toolkit approach equips accountants to identify, assess and mitigate climate-related financial risks — from physical impacts such as extreme weather to transition risks such as policy changes and market shifts — while supporting clients to build long-term resilience. By embedding these considerations into core processes, firms can strengthen decision-making, enhance reporting accuracy and position clients for sustainable growth in 2026 and beyond.
Understanding the Regulatory Landscape Driving Change
Mandatory climate-related disclosures under AASB S2, aligned with international IFRS S2 standards, require affected entities to report on governance, strategy, risk management and metrics. The phased rollout sees Group 1 entities reporting first, with broader application following in 2026 and 2027 for smaller thresholds. CA ANZ’s 2025 Climate & Nature Survey reveals that 58% of Australian members now view climate risks as significant to their roles, up from previous years, while three in four are aware of available tools and resources.
These changes reflect a broader shift where sustainability risks are no longer peripheral but material to financial prospects. Accountants who integrate ESG considerations into existing frameworks help clients meet compliance obligations and unlock strategic advantages, such as improved access to capital and stronger stakeholder confidence.
Industry reports indicate that organisations investing in integrated risk processes are better equipped to handle both acute physical events and chronic transition pressures, reducing potential impacts on cash flows, asset values and liabilities.
Core Elements of an Effective Sustainability Risk Management Toolkit
Leading practices draw directly from AASB S2 pillars to create a cohesive framework that links sustainability risks to financial outcomes. The four key components include:
- Governance oversight that clearly assigns responsibility to boards and management for monitoring climate risks and opportunities.
- Strategy integration that evaluates how risks and opportunities affect business models, financial planning and long-term resilience through scenario analysis.
- Risk management processes that identify, assess, prioritise and monitor climate exposures within the organisation’s overall enterprise risk framework.
- Metrics and targets that provide transparent, consistent measurement of performance, including greenhouse gas emissions across scopes.
Accountants can support clients by mapping these disclosures to existing financial planning cycles, ensuring assumptions used in climate scenario analysis align with those in forecasts and impairment testing. This alignment strengthens internal controls and reduces duplication of effort.
Many firms are now updating their internal control environments to capture sustainability data with the same rigour as financial data, incorporating new controls for emissions tracking, supplier due diligence and transition planning.
Practical Steps for Integrating ESG Risks into Financial Planning and Governance
Accountants are helping clients embed sustainability risk management through targeted, implementable actions. Common approaches include:
- Conducting materiality assessments to determine which climate risks could reasonably affect cash flows, access to finance or cost of capital over short, medium and long horizons.
- Incorporating climate scenario analysis into strategic planning and capital allocation decisions, testing resilience under different temperature pathways.
- Updating governance charters and board reporting templates to include regular updates on sustainability risks, with clear links to remuneration where appropriate.
- Enhancing internal controls over non-financial information, such as data validation processes for Scope 3 emissions and integration with financial systems.
- Developing integrated risk registers that treat climate exposures alongside traditional financial and operational risks.
These steps enable accountants to provide forward-looking advice that goes beyond compliance, helping clients identify opportunities such as investment in low-carbon technologies or new sustainable revenue streams.
CPA Australia resources highlight that accountants with strong ESG capabilities are increasingly sought after for leadership roles that combine financial expertise with sustainability strategy, reflecting the profession’s evolving skill requirements in 2026.
Strengthening Internal Controls and Assurance Readiness
Robust internal controls form the foundation for reliable sustainability reporting. Practices are extending existing financial control frameworks to cover climate data, including segregation of duties for emissions calculations, independent review processes and audit trails for scenario assumptions.
By aligning controls with AASB S2 requirements, accountants help clients prepare for potential assurance engagements under ASSA 5000 standards. This preparation reduces the risk of material misstatements and builds confidence with investors, lenders and regulators.
The approach also supports better governance by ensuring sustainability risks inform day-to-day decision-making, from procurement policies to investment evaluations, creating a more resilient organisational culture.
Sources
CA ANZ 2025 Climate & Nature Survey.
AASB S2 Climate-related Disclosures standard (effective periods beginning on or after 1 January 2025).
CPA Australia Sustainability (ESG) resources and professional development materials (2025).
CA ANZ Climate-related Disclosures information guides and key developments update (2025).
Treasury Laws Amendment legislation and ASIC RG 280 Sustainability Reporting (2025).
Frequently Asked Questions
What are the main requirements of AASB S2 for Australian entities?
AASB S2 requires disclosures on governance, strategy, risk management processes, and metrics and targets related to climate risks and opportunities that could affect an entity’s prospects. It applies from financial years beginning on or after 1 January 2025 for larger entities, with phased rollout thereafter.
How can accountants integrate sustainability risks into existing financial planning?
Accountants map climate scenarios to forecasts, align assumptions with impairment testing and capital planning, and incorporate material risks into budgeting and investment decisions to ensure consistency between sustainability and financial reporting.
What role does governance play in sustainability risk management?
Governance requires clear board and management oversight of climate risks, including how responsibilities are assigned, skills assessed, and information flows integrated into strategy, risk management and remuneration policies.
Why are internal controls important for ESG reporting?
Strong internal controls ensure the reliability of climate and sustainability data, support assurance readiness, reduce misstatement risks, and enable integration of ESG risks into the overall enterprise risk framework.
How significant are climate risks for accountants in 2026?
According to the CA ANZ 2025 Climate & Nature Survey, 58% of Australian members consider climate risks significant, with growing demand for tools, training and practical integration into client advisory work.
