Built on GREET-aligned CI scores, current CARB / WREGIS clearing prices, and 45V Tier 1 thresholds. Use it to ballpark before pathway certification narrows the number to within ±10%.
The calculator uses public, conservative GREET-model CI scores and current CARB Q1 2026 clearing prices. The real number is set after pathway certification narrows the CI score to your specific feedstock, equipment, and grid.
| Pathway | CI (gCO2e/MJ) | vs baseline |
|---|---|---|
| Fuel cell + directed biogas | -90 | -170 vs 80 |
| Fuel cell + pipeline gas | +65 | -15 vs 80 |
| RNG — landfill | -150 | -230 vs 80 |
| RNG — dairy / manure | -300 | -380 vs 80 |
| Biogas — on-site combustion | -120 | -200 vs 80 |
| H2 electrolyzer (clean grid) | +30 | qualifies 45V T1 |
The number this calculator produces is an estimate, not a binding pro forma. Pathway certification will tighten the actual CI score, and clearing prices vary quarter-to-quarter. For a binding number, start onboarding — the first stage delivers a binding pro forma within 7 days.
Onboarding form is 30 minutes. Binding pro forma in 7 days. First credit revenue 4–6 months after pathway certification.
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