Estimate the all-in budget for a carbon offset purchase using required credits, price per credit, transaction fees, due-diligence costs, and an optional annual price-escalation scenario. The calculator separates the credit subtotal from implementation costs.
Future credit price = Current price × (1 + Escalation %)^Years. All-in cost = Credits × Future price × (1 + Fee %) + Due-diligence cost.
The main result is the modeled all-in procurement budget at the future purchase date. The current-budget result provides a comparison using today's entered credit price.
Prices can vary widely by project, standard, vintage, geography, co-benefits, and market conditions. This calculator does not recommend a credit or predict prices.
For 4,000 credits at $18, escalating 8% for two years, the future subtotal is $83,980.80. A 3% fee plus $6,000 diligence produces an $92,500.22 all-in budget.
Only if your entered price already includes them. Otherwise use the transaction-fee input.
Review, legal, registry, and verification work may be fixed costs rather than a percentage of credit value.
The price is compounded by the entered annual escalation rate for the number of years delayed.
Yes. A zero rate keeps the future credit price equal to the current entered price.
No. Price alone does not establish additionality, permanence, verification quality, or claim eligibility.
| Variable | Meaning | Unit |
|---|---|---|
| Credits required | Planned procurement volume | credits |
| Price per credit | Current assumed unit price | USD/credit |
| Transaction fee | Variable purchasing cost | % |
| Due diligence | Fixed review and implementation cost | USD |