Climate valuation is not a single discount-rate adjustment
Climate risk can affect the value of an asset through several channels at the same time. A physical event may reduce revenue, damage assets and increase insurance costs. A transition shock may require new capex, shorten an asset's economic life, reduce demand or increase operating costs. Investor perception can also alter the cost of equity, debt spreads and the weighted average cost of capital.
This is why climate valuation should not be reduced to adding an arbitrary premium to the discount rate. The Norges Bank Investment Management discussion note in the source compilation emphasises both cash-flow and discount-rate channels and reviews how climate risk can be priced across financial assets.
Start with the cash-flow bridge
A robust valuation begins with the business model. Climate variables should be translated into revenue, margins, working capital, capex, depreciation, asset life and terminal value. Physical risk can reduce productive capacity, disrupt supply chains and increase maintenance costs. Chronic heat may affect labour and capital productivity. Transition risk can raise carbon and energy costs, change product demand and require replacement investment.
The KPMG framework in the compilation provides a practical decision lens: climate-adjusted NPV and IRR are useful because they show whether a project remains viable across alternative assumptions, not because they create a new form of finance. The same cash-flow mechanics continue to apply.
WACC should reflect risk, not become a plug
Changes in financing conditions may be relevant, but WACC should not be used as a residual adjustment for risks that should have been modelled in cash flow. If a carbon price directly raises operating costs, that effect belongs in cash flow. If a physical hazard reduces asset life, that belongs in the operating forecast or terminal value. A higher discount rate is more defensible where there is evidence that investors demand additional compensation for systematic or non-diversifiable climate exposure.
This distinction matters because double counting is easy. A bank or investor may reduce cash flows for transition costs and then add a large climate premium to WACC for the same risk. Model governance should explicitly map which risks are captured in cash flow and which are captured in discount rates.
Scenario analysis is more informative than a single climate value
The source material consistently stresses scenario analysis. Current-policy, orderly-transition, delayed-transition and severe-physical-risk pathways can produce very different valuation effects. The purpose is not to select one scenario as the forecast but to test the resilience of the valuation.
A useful output is a valuation distribution or range showing the contribution of operating assumptions, physical damage, transition costs, financing conditions and terminal value. This is particularly important for long-duration assets where the majority of value may sit in distant cash flows that are sensitive to uncertain climate and policy pathways.
Model specification can dominate the result
Norges Bank Investment Management notes that physical climate valuation contains high model-specification uncertainty. Its 2026 discussion note also addresses data quality concerns in a damage function used in NGFS Phase V scenarios and produces alternative estimates. This is a strong reminder that climate valuation is only as reliable as the economic translation layer between hazard and financial outcome.
For risk managers, the correct response is not to avoid modelling. It is to expose the uncertainty. Sensitivity analysis should vary damage functions, adaptation assumptions, insurance recovery, growth effects, discount rates and scenario paths. Independent validation should assess whether the result is stable enough for the intended decision.
From valuation to capital allocation
Climate-adjusted valuation becomes useful when it changes a decision. A bank can use it to compare collateral values, assess leveraged borrowers, determine financing structure or challenge project assumptions. An insurer can use it to assess asset-liability exposures and the resilience of invested assets. A corporate can use it to compare projects under alternative carbon-price and physical-risk assumptions.
The core principle is that climate risk should be integrated into conventional valuation discipline. Cash flows first, discount rates where justified, scenarios for uncertainty, and governance to prevent double counting or false precision.
Conclusion
The key requirement is decision usefulness. Climate analysis adds value when it improves risk identification, pricing, capital allocation, portfolio management or governance, while making uncertainty and model limitations explicit.
Sources
Norges Bank Investment Management. Economic impacts and pricing of climate risk. Discussion Note, 27 February 2026. https://www.nbim.no
KPMG Qatar. Integrating climate-risk assessment into corporate decision models. June 2026.
Network for Greening the Financial System. Climate scenarios. https://www.ngfs.net
Disclaimer: This article is professional risk-management analysis and is not investment, legal or regulatory advice.