Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Current price exposure
$2,250,000
Modeled future exposure
$4,500,000
Increase if price rises
$2,250,000
Current exposure as % of revenue
2.813%
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How to use this
- 1Enter total emissions in scope (tCO2e).
- 2Enter current/internal carbon price ($/ton).
- 3Enter modeled future carbon price ($/ton).
- 4Enter annual revenue (for context) ($).
- 5Read your current price exposure on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Many companies now run an internal carbon price — a shadow cost applied to emissions in capital allocation decisions — even without a regulatory mandate, because it's a leading practice CDP and TCFD scoring rewards and because regulatory carbon pricing (EU ETS, California cap-and-trade, a possible future US federal carbon fee) keeps expanding in scope. This calculator applies a price per ton to your total emissions to show current dollar exposure, then models exposure at plausible future price levels so finance teams can stress-test capital projects and product costs against a rising carbon price scenario. Companies increasingly use an internal carbon price in the $50-150/ton range for capital project evaluation even in jurisdictions with no mandatory price, specifically to avoid stranding investments in high-carbon assets that could face cost increases within their operating life.
Worked example
Using the values the calculator loads with:
Inputs
- Total emissions in scope: 45000 tCO2e
- Current/internal carbon price: 50 $/ton
- Modeled future carbon price: 100 $/ton
- Annual revenue (for context): 80000000 $
Results
- Current price exposure: $2,250,000
- Modeled future exposure: $4,500,000
- Increase if price rises: $2,250,000
- Current exposure as % of revenue: 2.813%
What each field means
Inputs
- Total emissions in scope (tCO2e)
- The total emissions in scope used in the calculation, measured in tCO2e. Starts at 45000 tCO2e so you have a working example on load.
- Current/internal carbon price ($/ton)
- The current/internal carbon price used in the calculation, measured in $/ton. Starts at 50 $/ton so you have a working example on load.
- Modeled future carbon price ($/ton)
- The modeled future carbon price used in the calculation, measured in $/ton. Starts at 100 $/ton so you have a working example on load.
- Annual revenue (for context) ($)
- The annual revenue (for context) used in the calculation, measured in $. Starts at 80000000 $ so you have a working example on load.
Results
- Current price exposure
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Modeled future exposure
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Increase if price rises
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Current exposure as % of revenue
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What internal carbon price do most companies use?
CDP disclosure data shows most companies using internal carbon pricing set it between $25 and $150 per ton, with a growing share clustering near $50-100 to align with the Network for Greening the Financial System's model scenarios for a well-below-2°C pathway. The specific number matters less than using it consistently across capital decisions.
How is this different from buying carbon offsets?
An internal carbon price is a planning and decision-making tool — it doesn't require an actual cash payment unless the company chooses to fund an internal carbon fund with the shadow cost. Offset purchases are actual cash transactions to acquire emissions reduction credits. Companies sometimes use the internal price to size an offset or reduction investment budget.
Why should a company without a regulatory carbon price bother with this?
It future-proofs capital decisions against expanding carbon regulation — a facility or product line that looks profitable today can look marginal once a plausible future carbon price is applied. It also increasingly shows up as an expected practice in CDP and TCFD-aligned climate risk disclosures that investors and lenders review.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Carbon Price Exposure Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/carbon-price-exposure
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/carbon-price-exposure" target="_blank" rel="noopener">Carbon Price Exposure Calculator — RevenueLab</a> (2026).</p>
Source: [Carbon Price Exposure Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/carbon-price-exposure) (2026).