Key takeaway
Internal carbon pricing is one of the smaller scoring areas of the questionnaire, but it is one of the highest-leverage moves a company can make to align internal capital allocation with climate strategy. CDP rewards companies that have a real internal carbon price applied to investment decisions, with disclosure expected on the price level, the scope of application, the type, and the reasons for using it. This lesson explains the four types of internal carbon prices, what scores well, and the practical questions to ask before setting one.
What internal carbon pricing is
An internal carbon price is a monetary value your company places on a tonne of CO2 equivalent emissions, used in business decisions even when no external regulation requires it. There are four common types:
| Type | How it works | Where it is used |
|---|---|---|
| Implicit price | An estimate of the cost emissions impose, used informally in analysis | Risk discussions, M&A diligence; not formally embedded in decisions |
| Shadow price | A price applied in capital budgeting calculations to evaluate projects, but not actually charged | Capex evaluation; longer-term planning |
| Internal trading price | An actual cost charged to business units for their emissions, with revenues redistributed or used for sustainability investments | Operational decisions; behavioural change at BU level |
| Internal fee | A flat fee per tonne, charged to business units; revenues fund climate projects | Behavioural change; funding low-carbon investments |
CDP scores each, but shadow prices and internal fees are the most commonly disclosed, and shadow prices applied to capex are the easiest to implement.
Q5.11 cluster - what CDP wants
The internal carbon pricing questions cover:
- Whether you use one (yes / no)
- What type
- The price level (currency per tCO2e)
- The scope of application (which decisions, which scopes, which geographies)
- Whether the price varies (by year, by scope, by region)
- Why you set it at that level
- How long you have used it
The Disclosure tier requires answering "yes" with basic detail. Awareness adds price level. Management adds scope and methodology. Leadership requires comprehensive application across capex, M&A, supplier selection, and product pricing.
Setting the price level
The most-asked question: what level should the price be?
CDP does not prescribe a number, but the Leadership-tier signal is a price that:
- Aligns with the cost of meeting your science-based target. If your internal abatement cost curve shows the marginal abatement cost at USD 80 per tonne to hit your 2030 target, the internal price should be at least USD 80.
- Tracks an external benchmark. Many companies use the IEA's 2030 implied carbon price (around USD 130 per tCO2e in OECD countries by 2030 in NZE), the EU ETS forward curve, the social cost of carbon (USD 190 per tonne per US EPA 2024), or the SBTi-implied carbon price.
- Increases over time. A price that is USD 50 today rising to USD 150 by 2030 signals expectation of policy ramp.
A price of USD 25-50 per tonne is a useful starting point but is generally read as conservative for a 1.5 degree-aligned company. USD 75-150 is the range that scores well at Leadership tier.
Analogy
Setting an internal carbon price is like setting an internal hurdle rate for capital. A company that requires 15 percent IRR on new projects will systematically allocate capital toward higher-return projects. A company that adds USD 100 per tCO2e to its capex calculations will systematically allocate capital toward lower-emissions projects. The math is the same; the variable being optimised is different.
Scope of application
Where you apply the carbon price decides whether it actually shifts decisions. CDP rewards broader scope.
A typical progression:
- Capex evaluation only. The price is added to the cost of high-emissions projects in the capex review. Useful but limited.
- Capex plus operational planning. The price is also embedded in 5-year plant operating cost forecasts, surfacing operating exposure to future carbon costs.
- Capex plus product P&L. The price is allocated to product lines proportional to their embedded emissions, surfacing which products are most exposed to a high-carbon-price future.
- Capex plus M&A diligence. Acquisition targets are evaluated under multiple carbon price scenarios. This is increasingly common for FS firms and energy companies.
- Capex plus supplier scoring. Suppliers are scored partly on their emissions intensity, with the carbon price translating that into a procurement preference signal.
Companies that apply the price across three or more of these areas earn Leadership-tier consideration.
Worked example: phasing in an internal carbon price
Worked example
ConsumerGoodsCo, India (synthetic). Year 1 disclosure: "We do not use internal carbon pricing." Disclosure tier with the non-disclosure penalty if blank.
Year 2 setup. Following a board sustainability committee discussion, the company introduces an internal carbon price.
Phase 1 (Year 2): USD 50 per tCO2e, applied to all new capex above INR 50 crore. Used in IRR calculations alongside conventional ROI. Implemented through an updated capex evaluation template. Cost: minimal beyond template change. Disclosed in Q5.11 with detail on level, scope, application.
Phase 2 (Year 3): Price increased to USD 75 per tCO2e, expanded to operating cost forecasts in 5-year plant business plans. New capex applications also forecast year-by-year carbon cost exposure under EU ETS and India CET (Carbon Emissions Trading) projections. Disclosed as an evolution of the Year 2 framework.
Phase 3 (Year 4): Price increased to USD 100 with a stated trajectory to USD 150 by 2030. Applied to M&A diligence: any acquisition target above INR 200 crore enterprise value is evaluated under at least two carbon price scenarios.
The Year 4 disclosure earns Leadership tier on Q5.11. The total work: one updated template, one ongoing methodology document, one M&A diligence framework revision. The cost is low; the score impact is meaningful and the strategic discipline is real.
Where companies underclaim or get it wrong
A few patterns to avoid:
-
Disclosing without doing. Some companies put a number on the slide but do not embed it in actual decisions. The grader looks for evidence the price changed a real outcome (a capex re-prioritisation, a supplier exit). Without evidence, the disclosure is read as theatrical.
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Setting it too low. A USD 10 per tonne price across operations sends a clear signal that the company does not expect carbon costs to be material, which contradicts a 1.5 degree-aligned target. Internal coherence matters.
-
Limiting it to one decision type. Capex-only is acceptable for Year 1 but caps the score. To reach Leadership, broaden the application over time.
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Forgetting the trajectory. A static price sends a static signal. A price with a stated rising trajectory matches the policy expectation and scores higher.
Internal carbon pricing is increasingly cited in TCFD-aligned disclosure as a strategy and risk management indicator. IFRS S2 expects entities to disclose whether they use an internal carbon price. So the work you do for CDP also flows into IFRS S2 reporting. Companies preparing for CSRD or for SEBI BRSR Core face similar expectations. The internal carbon price is becoming a multi-framework data point; setting one well now reduces effort across all of these.
Why this small module matters
The internal carbon pricing cluster is not the highest-points module. But it is one of the most diagnostic. A company that has a real, applied, escalating internal carbon price is signalling that climate is a strategic discipline, not a marketing line. CDP graders treat it that way. The disclosure here interacts with Q5.1 (strategic influence), Q5.4 (financial planning integration), and Q5.10 (targets credibility). A coherent answer across this cluster lifts the entire Strategy module by a half-letter or more.
Key Takeaways
- Internal carbon pricing comes in four types (implicit, shadow, internal trading, internal fee), with shadow prices and internal fees the most commonly disclosed
- Leadership-tier price levels track external benchmarks such as IEA NZE, the EU ETS, the social cost of carbon, or the SBTi-implied price
- Broader scope of application (capex, operating plans, M&A, product P&L, supplier scoring) is what differentiates Leadership tier from Management
- A static low price is read as performance theatre; a price with a stated rising trajectory matches policy expectations and scores higher
- Internal carbon pricing is increasingly required by IFRS S2 and CSRD, so this work is multi-framework, not just CDP
Knowledge Check
Test what you just learned
6 questions · check each one as you go
Which of these is NOT a type of internal carbon price?
What does CDP recognise as a Leadership-tier internal carbon price level?
True or false: A static internal carbon price (one number, never changing) sends the same scoring signal as a price with a stated rising trajectory.
Which scope of application is the strongest Leadership-tier signal?
Why does internal carbon pricing matter beyond CDP scoring?
Select all that apply
Match each carbon price type to where it is typically used.
Match each item to its pair
Implicit price
Shadow price
Internal trading price
Internal fee