Climate Transition Risk Assessment: Physical and Transition Risk Under TCFD

When Pacific Gas & Electric filed for Chapter 11 bankruptcy in January 2019, its balance sheet showed $51 billion in assets. The proximate cause of collapse was not a credit crisis or fraud. It was a failure of climate transition risk assessment.

Years of drought, rising temperatures, and a regulatory environment tightening around wildfire liability combined to produce over $30 billion in claims — a risk that sat unquantified in PG&E’s disclosures while appearing in its annual reports as a generic qualitative note. The board had read the words. Nobody had run the numbers.

Climate transition risk assessment under TCFD — the framework now absorbed into ISSB IFRS S2 and mandatory in over 50 jurisdictions — is the discipline of quantifying exactly those numbers before regulators, markets, or courts do it for you.

It covers two interconnected risk families: transition risks (policy, technology, market, reputation changes driven by decarbonization) and physical risks (acute weather events, chronic climate shifts) — physical risks that increasingly drive business continuity management scenarios such as multi-day site outages from wildfires, floods, and heat waves.

The PG&E case is a physical risk story, but the financial mechanism is identical to a transition risk story: unquantified exposure, inadequate governance, no ERM integration, catastrophic outcome.

This guide gives risk managers, CFOs, and sustainability leads a practitioner methodology for conducting a full climate transition risk assessment aligned with TCFD, ISSB IFRS S2, and ISO 31000 risk management principles.

You will find step-by-step scenario analysis, financial quantification frameworks, sector-specific stranded-asset analysis, and direct guidance on integrating outputs into your enterprise risk management framework. No theory without numbers; no numbers without actionable next steps.

The TCFD Framework: Four Pillars of Climate Transition Risk Assessment

The Task Force on Climate-related Financial Disclosures published its final recommendations in 2017. In October 2023 it disbanded, transferring all monitoring to the ISSB. Every element of the TCFD framework now lives inside IFRS S2 Climate-related Disclosures.

For practitioners, this means TCFD is not legacy guidance — it is current law in an expanding set of jurisdictions. The four pillars structure every disclosure requirement and every internal climate transition risk assessment you should now be running.

The COSO framework guide to internal controls maps closely onto this structure, with governance, risk management, and monitoring components that align pillar-for-pillar.

TCFD Four-Pillar Structure for Climate Transition Risk Assessment

The 2023 TCFD Status Report — the final one before the ISSB takeover — reviewed 3,100+ companies across 8 sectors. Only 4% disclosed in line with all 11 TCFD recommendations.

Governance disclosures improved the most (up 25 percentage points since FY2020 to 71%), but quantitative scenario analysis and Scope 3 emissions disclosures remain the weakest points across every sector.

Those are precisely the disclosures with the highest analytical value for a genuine climate transition risk assessment.

TCFD Climate Transition Risk Assessment Disclosure Rates by Pillar

Figure 1: Governance leads TCFD pillar adoption at 71% (FY2022), but Metrics & Targets — the pillar most critical for climate transition risk assessment — remains weakest. Source: TCFD 2023 Final Status Report, FSB.

Climate Transition Risk Assessment: Physical Risk vs. Transition Risk

Any credible climate transition risk assessment must address both risk families simultaneously, because they sit on an inverse spectrum.

The more aggressively the world decarbonizes, the higher the near-term transition costs for carbon-intensive industries — but the lower the long-run physical risk.

The less the world decarbonizes, the worse physical impacts become over time. The UNEP FI Climate Tango principles and the complete guide to the risk assessment process both underscore that integrated assessment is table stakes for IFRS S2 compliance.

A key practitioner insight: an asset can face both physical and transition risk at the same time and in the same scenario.

A coal-fired power plant in a flood-prone watershed faces stranding risk under a 1.5°C transition scenario and flood damage risk if that transition is delayed.

The S&P Global research on climate risk at the asset level demonstrates this compound exposure concretely. The operational risk assessment template can be adapted to capture both dimensions in a single assessment instrument.

The Four Categories of Climate Transition Risk Assessment: A Practitioner’s Taxonomy

Every climate transition risk assessment under TCFD disaggregates transition risk into four categories. Each has distinct drivers, financial transmission channels, and measurement approaches.

The risk identification tools and techniques used in mainstream ERM apply directly, supplemented by climate-specific data sources including the CDP Climate Change disclosure database and the NGFS Scenarios Portal.

Policy and legal risk is the most immediately quantifiable: apply the IEA NZE carbon price curve ($80/tonne today, $250/tonne by 2050) to your Scope 1 and 2 emissions to calculate your annual carbon cost exposure under each scenario.

For a mid-sized cement producer emitting 3 million tonnes of CO₂ annually, that is a $240M/year exposure by 2050 at IEA NZE pricing.

The key risk indicators template can be extended with a carbon price KRI that triggers a strategy review when spot market prices cross threshold levels.

Climate Transition Risk Assessment: Sector Earnings at Risk Under 1.5°C Pathway

Figure 2: Coal mining (68%) and fossil power generation (52%) face the highest climate transition risk exposure. Sectors above 25% should treat transition risk as a board-level financial priority. Source: TCFD Sector Reports, IEA WEO, Carbon Tracker.

Climate Transition Risk Assessment Scenario Analysis: A Step-by-Step Method

Scenario analysis is the technical core of any TCFD-aligned climate transition risk assessment. The IFRS S2 standard requires it.

The TCFD Knowledge Hub scenario guidance and the NGFS Phase V climate scenarios (published May 2025) are the current authoritative references. The six steps below follow ISO 31000’s Plan–Do–Check–Act structure and the risk management process flow chart methodology.

Step 4 — financial quantification — is where most organisations fall short. A qualitative statement that ‘carbon prices represent a risk to our operations’ does not satisfy IFRS S2 and has no value for capital allocation decisions.

Apply the carbon price trajectory from the chosen scenario to your verified Scope 1 and 2 emissions.

Model demand impacts using IEA World Energy Outlook sector projections. Stress-test your top 10 assets by revaluing them under the scenario carbon price and demand assumptions.

The output should be a number — or a range with confidence intervals — not a narrative. The Monte Carlo simulation for risk management approach handles the probability distribution of carbon price uncertainty effectively.

Carbon Price Trajectories: Climate Transition Risk Assessment Scenario Inputs

Figure 3: Under IEA Net Zero, carbon prices reach $250/tonne by 2050 vs $62 under current policies. The gap quantifies the cost of delayed action — a core input for climate transition risk assessment. Source: IEA WEO, NGFS Phase V.

Stranded Asset Analysis in Climate Transition Risk Assessment

Stranded assets — assets that lose economic value ahead of their anticipated useful life due to policy, technology, or market change — represent the most financially material outcome of transition risk.

The Carbon Tracker Initiative stranded asset analysis estimates that nearly 60% of proven oil and gas reserves and 90% of proven coal reserves must remain unextracted to give the world a 50% chance of limiting warming to 1.5°C.

The fossil fuel industry faces over $28 trillion in forgone revenues. But stranded-asset risk extends well beyond fossil fuels: buildings that fail tightening energy performance standards, ICE vehicle production lines, agricultural land in water-stressed regions, and carbon-intensive manufacturing all face the same dynamic.

A practical climate transition risk assessment stranded-asset screen asks three questions for every material asset: (1) What is its carbon intensity relative to the sector pathway? (2) Under which scenario and in which year does it become economically unviable? (3)

What is the write-down value and timing? The CRREM (Carbon Risk Real Estate Monitor) pathways, now embedded in OECD real estate climate risk guidance, provide sector-specific decarbonisation trajectories for commercial real estate.

The financial risk assessment template can be extended with a stranded-asset column that maps each asset to its scenario stranding year.

Stranded Asset Exposure by Sector Under 1.5°C Transition

For financial institutions, stranded-asset exposure compounds through the lending book, equity portfolio, and insurance underwriting.

The BIS working paper on pricing carbon risk demonstrates that markets systematically underprice transition risk in bank loan portfolios. The model risk management SR 11-7 framework provides validation standards applicable to the climate models used in transition risk quantification.

Lenders should require borrowers in high-transition-risk sectors to submit a TCFD-aligned climate transition risk assessment as part of covenant review and credit renewal processes.

Regulatory Landscape for Climate Transition Risk Assessment (2024-2027)

The compliance case for rigorous climate transition risk assessment is now iron-clad. Regulators across every major capital market have moved from voluntary guidelines to mandatory requirements.

The common architecture is TCFD/ISSB — organizations that have already built TCFD-aligned processes will find the shift to IFRS S2, CSRD, and California’s SB 261 far less disruptive than those starting from scratch.

The SOX compliance and ERM alignment guide and the compliance risk assessment framework both offer structural templates adaptable to climate-specific compliance tracking.

Key Mandatory Climate Transition Risk Disclosure Regulations

A practical compliance note: the how to conduct a compliance risk assessment methodology applies directly to mapping your climate disclosure gaps. Build a crosswalk between each regulation above and your current TCFD disclosures.

For each gap, create a remediation action with owner, deadline, and evidence-of-closure criteria — exactly as you would for a SOX or GDPR gap. The ISSB 2024 progress report provides the most current benchmark for where companies stand globally.

Integrating Climate Transition Risk Assessment into Your ERM Framework

The single biggest failure mode in climate transition risk assessment is treating it as an ESG reporting exercise rather than a risk management discipline.

The consequence is a well-formatted disclosure that influences nothing: no capital reallocation, no risk appetite adjustment, no KRI monitoring.

The what is enterprise risk management cornerstone and the COSO ERM vs ISO 31000 comparison both provide the governance architecture for avoiding this trap.

The Three Lines Model assigns clear ownership: 1st line (business units) own transition risk identification; 2nd line (risk function) owns the assessment methodology, aggregation, and KRI monitoring; 3rd line (internal audit) validates the process and data quality.

Three Lines Integration for Climate Transition Risk Assessment

Concretely, integrate climate transition risk assessment outputs into your risk register template by adding five columns: Scenario, Carbon Cost Exposure ($), Stranded-Asset Exposure ($), Residual Rating, and KRI Threshold.

Each climate transition risk should have a named owner from the 1st line, a KRI with a threshold that triggers escalation, and a defined treatment strategy. The how to develop key risk indicators guide provides the design principles.

Your board risk dashboard should show climate transition risk on the same page as credit risk, market risk, and operational risk — not in a separate sustainability appendix.

The risk reporting importance and best practices explains exactly how to structure that dashboard.

Frequently Asked Questions: Climate Transition Risk Assessment TCFD

What is climate transition risk assessment under TCFD?

A climate transition risk assessment under TCFD is a structured process for identifying, quantifying, and disclosing the financial impacts of decarbonization on an organisation.

It evaluates four categories — policy and legal, technology, market, and reputation — using scenario analysis aligned with at least two warming pathways (typically 1.5°C and 3°C+).

The output is a set of quantified financial impacts (revenue, cost, asset value, capex) that feeds into both ERM and investor disclosures.

Since October 2023, TCFD’s methodology has been incorporated into IFRS S2, making it a mandatory disclosure standard rather than a voluntary framework.

How does ISSB IFRS S2 differ from TCFD for climate transition risk assessment?

IFRS S2 builds directly on all 11 TCFD recommendations but extends them in three key areas: it requires transition plans (not just disclosure of risks), it includes industry-specific metrics from the SASB standards, and it mandates Scope 3 emissions disclosure for most entities.

Organisations already conducting TCFD-aligned climate transition risk assessments will find the incremental compliance burden modest. The most common gap is the absence of a formal transition plan document that maps strategy to a 1.5°C or 2°C pathway.

Which scenarios should we use for climate transition risk assessment?

Use at minimum two contrasting scenarios: an orderly transition (IEA Net Zero or NGFS Orderly, ~1.5°C) and a high-emissions scenario (NGFS Hot House World or IEA STEPS, ~3°C+).

Financial institutions regulated under APRA, PRA, or the ECB are expected to add a disorderly transition scenario (NGFS Disorderly) that models abrupt, late-cycle policy tightening.

The NGFS Phase V scenarios, published in May 2025, include new short-term (3-5 year) scenarios that enable near-term financial risk modelling, which is particularly useful for credit risk applications.

How do you quantify climate transition risk in financial terms?

Start with your verified Scope 1 and 2 emissions and apply the carbon price trajectory from your chosen scenario (e.g., $140/tonne by 2030 under IEA NZE) to calculate annual carbon cost exposure.

For technology risk, use sector demand projections from the IEA and model revenue impacts using elasticity assumptions. For stranded assets, revalue each material asset under scenario carbon prices and demand assumptions using DCF analysis.

For market risk, model credit rating migration and cost-of-capital shifts. Aggregate exposures using Monte Carlo simulation to produce probability distributions with confidence intervals.

What is the difference between physical and transition risk in climate assessment?

Physical risk refers to financial losses from direct climate impacts: extreme weather events (acute, already materialising) and long-run shifts like sea-level rise, heat stress, and precipitation changes (chronic, worsening over 2030-2050).

Transition risk refers to financial losses from the shift to a low-carbon economy: carbon pricing, technology disruption, demand destruction, and reputational damage.

They interact: aggressive decarbonization reduces future physical risk but increases near-term transition costs. Both must be assessed under multiple scenarios; using only one scenario framework is now an IFRS S2 compliance failure.

Which ISO standards apply to climate transition risk assessment?

ISO 14090 (Adaptation to Climate Change: Principles, Requirements and Guidelines) provides the overarching adaptation framework.

ISO 14091 offers specific guidelines on vulnerability, impacts, and risk assessment, including impact chains and screening assessments that align with TCFD’s physical risk analysis. ISO 14092 addresses climate change adaptation for organisations.

All three are complementary to ISO 31000 (Risk Management), which provides the underlying risk process (identify, analyse, evaluate, treat, monitor). Together they form an audit-defensible methodological architecture for a comprehensive climate transition risk assessment.

How often should we update our climate transition risk assessment?

Minimum annually, aligned with your financial reporting cycle and ISSB disclosure obligations.

However, material events should trigger interim updates: significant new carbon pricing legislation, IEA or NGFS scenario revisions, major technology cost shifts (e.g., battery or green hydrogen price drops), large acquisitions or divestments of carbon-intensive assets, or board-level changes in climate risk appetite.

Leading organisations run quarterly KRI monitoring and full annual reassessments, with mid-year deep-dives for the sectors or assets showing the highest transition risk exposure.

What are the most common climate transition risk assessment failures?

The seven most damaging failures are: (1) qualitative-only assessment without financial quantification; (2) single-scenario analysis (1.5°C only, ignoring high-emissions scenarios); (3) ignoring Scope 3 value chain emissions, which typically represent 70-90% of total carbon exposure; (4) siloing the assessment in the sustainability team without ERM or finance involvement; (5) no KRI monitoring between annual assessments; (6) boilerplate disclosure language that does not meet IFRS S2’s specificity requirements; and (7) disconnecting assessment outputs from capital allocation and strategic planning decisions.

Common Pitfalls in Climate Transition Risk Assessment

The sustainserv research on common climate risk assessment mistakes highlights the geospatial granularity gap and the health impact gap as particularly underaddressed.

For physical risk, facility-level asset mapping (not country-level) is the minimum standard — the same discipline applied in RCSA workshop methodology for operational risk applies here.

Looking Ahead: Climate Transition Risk Assessment in 2026-2028

Three structural shifts will reshape the practice of climate transition risk assessment over the next two to three years. First, short-term climate scenarios. The NGFS published its first vintage of short-term (3-5 year) scenarios in May 2025.

These close a critical gap: until now, TCFD scenario analysis was a long-horizon exercise (2050 endpoints) that could not easily be linked to annual credit risk, market risk, or earnings guidance.

Short-term NGFS scenarios now enable quarterly climate risk stress tests, which regulators in the UK, Australia, and the ECB are beginning to embed in supervisory frameworks. For risk managers, this means the climate transition risk assessment frequency expectation is shifting from annual to quarterly.

Second, mandatory transition plans. IFRS S2, the EU CSRD, and the UK’s Transition Plan Taskforce (TPT) all now require organisations to publish transition plans — documents that specify how the business will reach its climate targets and what financial assumptions underpin each step.

A transition plan is not the same as a disclosure: it is a strategic planning document that must be stress-tested against your climate transition risk assessment.

For the first time, this directly connects risk management to strategy in a way that boards and auditors can scrutinize. The convergence of risk oversight with strategic planning has never been more literal.

Third, TNFD integration. The Taskforce on Nature-related Financial Disclosures (TNFD) has published its final framework recommendations, and early adopter reporting began in 2024.

Nature and biodiversity risk interacts with climate transition risk in both directions: decarbonisation pathways that rely on bioenergy or land-use change can destroy natural capital and amplify physical climate risk; meanwhile, biodiversity loss accelerates ecosystem collapse that produces acute physical climate risk events.

By 2027, leading organisations will conduct combined TCFD-TNFD risk assessments, and the supply chain risk management ISO 28000 guide provides the value chain traceability foundation needed for nature risk assessment.

The direction is unambiguous: climate transition risk assessment is becoming a quarterly, cross-functional, financially quantified discipline embedded in ERM, capital allocation, and strategic planning.

Organisations that begin now — even with a high-level carbon price sensitivity on their top 10 assets — will be years ahead of those waiting for regulatory compulsion.

The best risk management programs are those that treat regulatory change as a lagging indicator of a risk that markets have already priced.

Need to build or strengthen your organisation’s climate transition risk assessment capability? Our team at riskpublishing.com provides practitioner-grade frameworks, templates, and advisory support aligned with TCFD, ISSB IFRS S2, and ISO 31000.

 Visit our services page to see how we can help, or contact us directly to schedule a no-obligation conversation about your specific climate risk assessment needs.

Related Sustainability, ESG, and Climate Risk Resources

Climate transition risk assessment is one piece of a wider sustainability and ESG tooling landscape that includes carbon accounting, ESG data platforms, and asset-level physical risk analytics. The companion guides below extend the TCFD-aligned approach above with practical software comparisons and property-level risk tools.

• Top Carbon Accounting Software Compared reviews the platforms that quantify Scope 1, 2, and 3 emissions for transition-risk modelling.
• Best ESG Data Management & Rating Platforms Compared evaluates the data and rating tools that feed ESG-integrated risk assessments and disclosure workflows.
• Risk Factor: Find Your Property’s Climate Risks walks through the asset-level physical climate risk tool that complements portfolio-level transition analysis.

Chris Ekai

Chris Ekai is a Risk Management expert with over 10 years of experience in the field. He has a Master’s(MSc) degree in Risk Management from University of Portsmouth and is a CPA and Finance professional. He currently works as a Content Manager at Risk Publishing, writing about Enterprise Risk Management, Business Continuity Management and Project Management.