10/29/2026
THE 45Z BIOFUEL TAX CREDIT, PART 4: INSIDE THE UPDATED USDA FEEDSTOCK CARBON INTENSITY CALCULATOR
USDA recently released an updated version of its Feedstock Intensity Calculator (FD-CIC) for the 45Z Clean Fuel Production Tax Credit. The updated FD-CIC differs from the previous version in ways that matter for producers. It is field-specific, and each enrolled field needs its actual yield, expected (APH) yield and nitrogen rate. Each field receives its own Carbon Intensity (CI) score. The largest reductions come from soil-carbon practices, whose values are set by region, while nitrogen use per bushel is the part of the score that responds to the field’s own records. Location still matters, and every field’s score is reported against the same national reference point. Notably, in the current version, crop yield and other field inputs, enter the CI calculation only through nitrogen-per-bushel calculations. As such, only the fertilizer-related terms respond to crop yields and producers should not expect their CI score to fall in proportion to yield increases.
Read more: https://farmdocdaily.illinois.edu/2026/10/the-45z-biofuel-tax-credit-part-4-inside-the-updated-usda-feedstock-carbon-intensity-calculator.html