Tracking Clean Fuel Production for 45Z Compliance with Mangrove

The Section 45Z Clean Fuel Production Credit is one of the most significant financial tailwinds for U.S. fuel producers to date. Established under the Inflation Reduction Act and recently refined by the One Big Beautiful Bill, this tax incentive covers clean transportation fuels produced domestically through December 31, 2029. Depending on fuel type, carbon intensity (CI), and labor practices, the credit offers producers between $0.20 and $1.00 per gallon.

The path forward is clear: to secure these credits, producers must implement robust, auditable data infrastructure. Relying on manual reporting is a recipe for operational bottlenecks and compliance risk. Instead, producers require a continuous, verifiable record - tracking production methods, feedstock provenance, and carbon intensity calculations - to maintain eligibility.

Mangrove bridges this gap with a purpose-built platform designed to streamline data collection and quantification, making environmental compliance and tax reporting seamless, centralized, and audit-ready.

The Data Challenge Behind 45Z

Section 45Z requires producers to demonstrate that their fuel maintains lifecycle GHG emissions below 50 kg CO2e/mmBTU. Because the credit scales proportionally where a lower CI score directly increases the credit value, data directly the bottom line.

To meet Treasury requirements, producers must accurately capture:

• Feedstock Provenance: Precise volumes and origin data.‍
• Energy Inputs: Electricity usage (grid-sourced, on-site, and EACs) and natural gas consumption.‍
• Material Inputs: All chemicals and processing aids used in production.‍
• Carbon Management: Capture and storage (CCS) metrics.‍
• Outputs: Finished fuel volumes and valorized co-products.

While manual spreadsheets might suffice for a single facility, they become a liability as production scales across multiple sites and feedstocks. Mangrove provides the unified ledger necessary to streamline reporting and provide finance departments with a single, reliable source of truth.

Automated Data Capture for RNG and Biofuels

Mangrove collects data in various formats to ensure no monitoring parameter is overlooked. By connecting directly to facility-level sources, Mangrove pulls data seamlessly from:

• Operational Hardware: SCADA systems, data historians, and PLCs (including Rockwell and Ignition) to collect gas flows, electricity usage, and production volumes in real time.‍
• Financial Software: ERP systems like NetSuite and accounting platforms like QuickBooks, to collect co-product sales, purchase receipts, and feedstock procurement records.‍
• Manual Data Processing: Stakeholder portal access for operator uploads, optical character recognition for evidence data parsing, and bulk upload capabilities for spreadsheet-based inputs. 

By automating ingestion at the point of activity, Mangrove provides an auditable record that eliminates the reporting lag and human error inherent in manual processes.

Quantification Methods & Model Optionality

The 45Z framework utilizes distinct methodologies depending on fuel type. The primary allowable programs include:

• 45ZCF-GREET: The primary model for non-SAF transportation fuels (also available for SAF). It integrates static background data with dynamic, producer-specific foreground data to calculate a precise CI score.
• ‍CORSIA Methodology: Exclusively for SAF. Producers can utilize CORSIA Default benchmarks or CORSIA Actual facility-specific values to determine their final carbon footprint.

Maximizing Credit Value with Mangrove

Mangrove’s quantification engine processes your data through multiple models simultaneously to ensure you capture the maximum available credit:

• Scenario Optimization: For SAF producers, Mangrove runs the 45ZCF-GREET model alongside both CORSIA Actual and CORSIA Default pathways to identify which of the three outcomes yields the highest credit value.‍
• Automated Co-Product Allocation: For facilities producing multiple commercial products, Mangrove automatically handles complex allocation for co-products. This ensures that product emissions profiles are accurately distributed and that all valorized streams contribute to a lower CI for the primary fuel.‍
• Dynamic Version Control: Treasury regulations require producers to use the most recent model version available on the first day of the tax year. However, if a revised model is released mid-year, producers have the option to adopt the new version. Mangrove will run both versions against your data to determine which provides the more favorable outcome.‍
• Multi-Credit Complexity Management: Clean fuel producers rarely operate under a single protocol. A single RNG project might also report to RFS and state LCFS programs alongside the 45Z tax credit. While the proposed regulations include anti-stacking rules (prohibiting the claim of 45Z alongside 45V or 45Q for the same facility in the same year), 45Z remains stackable with RINs and LCFS credits. Mangrove serves as a unified data platform, routing the same underlying dataset to multiple reporting destinations, eliminating reconciliation headaches.
  

Once the calculations are finalized, Mangrove auto-generates your IRS-ready report. While data is captured continuously throughout the year, your annual tax reporting is reduced to a final review and submission - eliminating the stress and complexity of tax season.

Why This Matters Now

With a public hearing scheduled for May 28, 2026, and final guidelines expected later this year, the regulatory landscape is firming up. While specific details may evolve, the Treasury has already established clear mandates for data collection, quantification, and reporting. Producers who implement robust digital infrastructure now will avoid the high cost and complexity of retroactive data retrieval.

By getting ahead of these requirements today, producers ensure they are positioned to capture the full value of the 45Z tax credit come tax season without the risk of audit reversals or clawbacks.

Ready to simplify your 45Z compliance? Mangrove is the only platform engineered to manage the overlapping complexities of 45Z, RFS, LCFS, ISCC, and CORSIA. Let’s talk about future-proofing your operations across the clean fuel landscape.