Why the Value of 45Z Is Still Unclear Understand how the Section 45Z tax credit works, how much it’s worth, and how carbon intensity, feedstock data, and lifecycle emissions determine value.

Section 45Z — formally known as the Clean Fuel Production Credit under the Inflation Reduction Act — is one of the most significant federal incentives shaping the future of low-carbon fuels in the United States. 

But despite the headlines and projections, there’s a critical gap in how the market understands it. 

Many organizations still cannot clearly answer one simple question: How much is 45Z actually worth — and what determines that value? 

For senior leaders in biofuels, agriculture, energy, and sustainability, that uncertainty is no longer acceptable. The real opportunity in 45Z is not just eligibility. It is optimization. 

 

What Is the Section 45Z Clean Fuel Production Credit?

Section 45Z replaces prior biofuel incentives with a performance-based tax credit tied directly to lifecycle greenhouse gas emissions. 

Unlike fixed per-gallon credits, the 45Z tax credit value is determined by carbon intensity (CI) — meaning the lower the lifecycle emissions of a fuel, the higher the credit per gallon. 

Eligible fuels may include: 

• Ethanol 
• Biodiesel 
• Renewable diesel 
• Sustainable aviation fuel (SAF) 
• Renewable natural gas 

The credit is available for qualifying fuels produced after 2024, and its value is calculated based on emissions performance compared to statutory benchmarks. 

This is not a flat subsidy. 

It is a carbon performance incentive. 

 

How Much Is the 45Z Tax Credit Worth? 

The headline numbers vary by fuel pathway and carbon intensity score, but current modeling and industry commentary suggest: 

• Credits may range up to $1.00 per gallon for non-aviation fuels 
• Sustainable aviation fuel (SAF) may reach $1.75 per gallon 
• Aggregate value across the market could exceed tens of billions of dollars over the life of the program 

However, those figures represent maximum potential. 

Actual realized value depends entirely on lifecycle emissions data — including feedstock carbon intensity, production efficiency, energy inputs, and documentation rigor. 

This is where many organizations underestimate or miscalculate their position. 

 

What Determines 45Z Tax Credit Value? 

The 45Z clean fuel production credit hinges on several interlocking factors: 

1. Carbon Intensity Score

The lower the lifecycle greenhouse gas emissions per unit of fuel, the higher the credit value. Carbon intensity calculations incorporate: 

• Feedstock production emissions 
• Fertilizer and nitrogen management 
• Energy use in production 
• Transportation emissions 
• Processing efficiency 

Small changes in carbon intensity can materially impact credit value. 

2. Feedstock and Agricultural Data

Agriculture plays a pivotal role in determining 45Z outcomes. 

Soil management practices, regenerative systems, nitrogen application rates, yield variability, and carbon sequestration all influence feedstock emissions profiles. 

Yet many organizations lack: 

• Verified field-level data 
• Standardized grower documentation 
• Traceable farm-to-fuel reporting systems 

Without defensible feedstock data, companies risk under-claiming value or facing audit exposure. 

3. Lifecycle Emissions Modeling

Lifecycle emissions calculations must align with federal guidance and approved methodologies. 

This requires: 

• Carbon modeling expertise 
• Integrated emissions accounting 
• Documentation systems capable of audit review 

45Z is not simply about fuel output, it is about emissions traceability. 

 

Why the Value of 45Z Is Still Unclear? 

The industry conversation around 45Z has focused heavily on policy timelines and eligibility criteria. But the harder question — what is our pathway worth under real-world carbon intensity performance? — is often unanswered. 

Common challenges include: 

• Overreliance on assumed emissions factors 
• Limited integration between agricultural data and fuel reporting systems 
• Unclear feedstock traceability 
• Fragmented data governance 

In short, organizations may know they qualify for 45Z, but they do not fully understand how to maximize it. 

That’s a strategic blind spot. The difference between average carbon intensity and optimized carbon intensity can represent millions of dollars annually for large producers. 

45Z Is a Data Strategy as Much as a Tax Strategy 

The companies that will unlock the most value from the Section 45Z tax credit are not simply those producing clean fuel. 

They are the ones building: 

• Traceable farm-to-fuel data systems 
• Verified regenerative practice documentation 
• Integrated carbon intensity modeling 
• Audit-ready emissions reporting infrastructure 

45Z turns emissions performance into economic performance. And emissions performance depends on data governance. 

How Corvian Supports the Full 45Z Lifecycle

At Corvian, we work across agriculture, biofuels, and enterprise systems to support organizations navigating the full 45Z cycle. 

Our capabilities include: 

• Field-level data capture and grower onboarding 
• Agronomic validation of regenerative practices 
• Carbon intensity modeling and lifecycle emissions analysis 
• System integration between farm data, production systems, and enterprise reporting platforms 
• Audit-ready documentation frameworks 

We help organizations move from assumed carbon performance to verified carbon performance — translating agricultural practice into measurable credit value. 

We’ve digitized over eight million acres for carbon programs, and through that experience, we know that understanding what 45Z is worth begins with understanding the data that drives it.

The Bottom Line

Section 45Z is one of the most consequential clean fuel incentives in recent policy history. 

But its value is not automatic. It is determined by carbon intensity, feedstock governance, lifecycle modeling accuracy, and documentation integrity. 

The organizations that treat 45Z as a strategic performance system — rather than a passive tax credit — will unlock materially greater value. 

Discuss Your 45Z Strategy 

If you are evaluating how much Section 45Z is truly worth to your organization, we can help.

Book a meeting with Corvian to review your current carbon intensity pathway, data governance systems, and 45Z optimization strategy. Our specialized team will help you uncover:

• where value is created.
• where it may be lost.
• And ensure your 45Z performance is defensible, measurable, and maximized.