The 45Z tax credit (Clean Fuel Production Credit) allows farmers using climate-smart practices (no-till, cover crops, nutrient management, and others) to deliver low-carbon corn (CI score of 29 or less) to ethanol plants, potentially unlocking premiums exceeding $1.00 per bushel through shared tax credits. This creates a new revenue stream, higher basis premiums, and incentives to document and monetize sustainable practices, potentially increasing land value.  And as the field CIS approaches 0.0, the propensity of the farming systems to sequester carbon for both soil health and soil carbon crediting increases.

Key Benefits for Low-CI Corn Producers (2025–2029)

• Premium Pricing Opportunities: With a very low CI score (10 or less versus the county CI for conventional corn - typically 29 to 30), farmers are valuable partners for biofuel plants seeking to maximize their own 45Z tax credits. This allows farmers to demand a portion of the tax credit value, which is estimated at roughly two cents per gallon for every point a plant reduces its CI score below the plant CIS average of 50.

• Stronger Local Basis: As ethanol plants compete for low-carbon, high-quality feedstock, farmers within the "draw territory" can expect a stronger local basis.

• New Revenue Stream: The 45Z credit effectively turns sustainability practices into a marketable product, providing a financial incentive for in-season nitrogen management, no-till, and cover cropping.  

• If the farm can not make use of the shared 45Z tax credit these can be sold on the open market for 90-95% of their value.

• Market Differentiation: Low-CI corn differentiates a producer’s product, making it highly desirable to biorefineries supplying cleaner, lower-emission fuels.

• For alternate corn markets like feed grains for chickens, eggs, pork, milk, and others, these consumers of low CIS feeds can also use these carbon efficient bushels in their carbon foot print disclosures.

How to Maximize Benefits

• Data Management: Farmers must document their practices to verify low CI scores. Using tools to track and audit data, such as those that track cover crop planting and, nutrient management are critical.

• Collaboration with Biofuel Producers: Actively working with biofuel plants or grain buyers to identify how their specific corn helps the processor reach lower CI thresholds.

• Implementing "Regen" Practices: The lowest CI scores, required for maximum benefit, are achieved through practices like, no-till and cover crops.

To illustrate the financial impact of delivering low-carbon intensity (CI) corn, consider an example based on current 45Z tax credit rules. In this scenario, a farmer delivers corn with a CI score of 10 to an ethanol plant that otherwise has a score of 49. Because roughly 60% of an ethanol plant’s CI score is determined by the feedstock's carbon footprint, the farmer’s low-score corn directly lowers the plant's final score, unlocking substantial tax credits. 

Financial Breakdown per Bushel

The example assumes a standard yield of 2.8 gallons of ethanol per bushel and an industry-standard credit value of $0.02 per gallon for every CI point reduced below the 50-point threshold.

Note:

The 60% Weighting Explained (Depends on the Ethanol Plant Policy and their efforts to lower plant CIS)

In the example calculation for the 45Z credit, the 60% weighting refers to the Proportional Allocation of Carbon Reduction Benefits between the producer (farmer) and the fuel facility (ethanol/biodiesel plant).

When calculating the total value of the credit, the IRS often uses a split to acknowledge that the carbon reduction is a "joint venture."

• 40% Operational Efficiency: Awarded for the fuel plant’s internal efficiency (carbon capture at the stack, renewable power for the plant).

• 60% Feedstock Contribution: Awarded for the "Scope 3" emissions—specifically the farming practices used to grow the corn or soy.

Why This Matters for Your Farm

• Massive Per-Acre Impact: On a 200-bushel-per-acre yield, a $0.75/bu premium translates to $150 gross per acre in additional revenue.

• Documentation is Key: To claim these credits, you must provide verified data on your practices, such as no-till or cover cropping, as plants cannot claim the 45Z credit without farm-level traceability.

• Varying Agreements: While this example uses a 70:30 split, actual pass-through rates will be negotiated locally and may range from 30% to 100% depending on the plant’s needs and competition for low-CI grain

What is holding this up?  At this time the approval of the release of the farmer inclusive 45Z program sits in the Office of Management and Budget awaiting a finalized report inclusive of public comments followed by trumpco’s signature.  

The official model used by the Department of Energy (DOE) and Department of the Treasury to calculate the carbon intensity (CI) score for the 45Z Clean Fuel Production Credit is named 45ZCF-GREET. 

45ZCF-GREET Model Details

• Full Name: Greenhouse gases, Regulated Emissions, and Energy use in Technologies for the 45Z Clean Fuel credit (45ZCF-GREET).

• Development: Developed by Argonne National Laboratory specifically to evaluate lifecycle greenhouse gas (GHG) emissions for transportation fuels as required by Section 45Z.

• Application: It determines the emissions rate used to calculate the "emissions factor," which dictates the value of the tax credit for both Sustainable Aviation Fuel (SAF) and non-SAF transportation fuels.

• Key Components: The model evaluates the full "well-to-wheel" lifecycle, including feedstock sourcing, land use changes (I-Effects), and fuel production. 

Related Calculators

In addition to the primary GREET model, federal agencies use specialized tools for specific inputs:

• FD-CIC: The Feedstock Carbon Intensity Calculator, released by the USDA, allows for the assessment of farm-level emissions based on specific agricultural practices (such as no-till or cover cropping).