USDA finalizes voluntary carbon intensity framework for corn growers under 45Z biofuel tax credit

The USDA has finalized a voluntary framework that lets corn growers measure and verify the carbon intensity of their crops using a new Feedstock Carbon Intensity Calculator. Farmers can input field-level data on tillage, nutrient management, and cover crops to generate a carbon score. Crops with lower scores may command higher prices from biofuel producers seeking low-carbon feedstocks under the federal 45Z Clean Fuel Production Tax Credit. Participation requires detailed production records, third-party verification, and a mass balance system to track grain through the supply chain to ethanol facilities. Some industry groups are pushing for alternatives that would let farmers sell environmental benefits separately from physical grain deliveries. The program also covers soybeans, sorghum, and spring canola. Policymakers are still reviewing how low-carbon farming practices will be reflected within the 45Z credit program. Growers are advised to follow policy developments and engage with industry organizations as the rules continue to evolve.