Compliance
New Rules for Clean Fuels Producers: A Guide to Notice 2026-53 and WFTC Changes
Producers of clean fuels must understand the new emission rate rules under Section 45Z and how manure, regenerative agriculture, and eligible feedstocks impact credits under WFTC.
By NomadicTax Research Team • 5-8 min read • September 13, 2026
## Overview: What’s changed under WFTC and Notice 2026-53
The Working Families Tax Cuts (WFTC) amended Section 45Z of the Internal Revenue Code to **expand the Clean Fuel Production Tax Credit**. Notice 2026-53, issued September 8, 2026, provides the **2026 emissions rate table** and technical guidance including how farm practices and manure-derived fuels factor into emissions ratings. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
Key mandates include:
- **Excluding emissions from indirect land‐use change** when calculating emissions rates;
- Limiting eligible transportation fuel to feedstocks grown in the **U.S., Mexico, or Canada**;
- Prohibiting negative emissions rates—except for animal manure-derived transportation fuels;
- Providing distinct emissions rates for specific manure feedstocks (e.g., dairy and swine for now; beef and poultry fed in 2026 anticipated to be added soon). ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
## How to apply the new guidance: timelines and safe harbors
- Safe harbor for **2025 clean fuel production** under the new rules; safe harbor protections cover certain requirements not yet applied to modeling or allowed methodologies. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
- Transition rules for feedstocks and practices that aren’t yet fully addressed in updated modeling (e.g. manure management, nutrient budgets) are provided. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
- Producers should use the **2026 emissions rate table** included in Notice 2026-53 for credit computations. If a methodology isn’t updated yet, follow transitional guidance. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
## Who is affected & how much credit can change
- **Producers using manure** (currently those using dairy and swine feedstocks) — now get distinct rates, potentially lowering lifecycle emissions. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
- Regenerative agricultural practices, per USDA rules, may reduce feedstock emissions calculations if proper documentation and guidelines are met. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
- Fuel produced outside the U.S., Mexico, or Canada is no longer eligible for the transportation fuel portion of Section 45Z. ([irs.gov](https://www.irs.gov/newsroom/irs-issues-notice-on-45z-clean-fuel-production-tax-credit-to-support-domestic-biofuel-production-and-american-agriculture?utm_source=openai))
## Example calculations & case studies
**Hypothetical Farm A**: Uses swine manure exclusively, and applies regenerative practices certified under USDA guidelines. With the new table, its emissions rate might fall below a key threshold, increasing the credit per gallon produced.
**Farm B**: Uses beef and poultry manure—feedstocks not yet fully integrated into 2026 model; must follow transitional rules and may not yet benefit from full manure credits until updates later in 2026.
**Transport fuel from imported biomass**: Likely no longer eligible under the transportation fuel limitation unless the raw feedstock is grown in the U.S., Mexico, or Canada. Imported biomass could disqualify part or all of the credit for that fuel.
## Practical steps for clean fuel producers
- Verify whether your feedstocks are on the 2026 emissions rate table (dairy or swine manure); plan if they’re not.
- Document regenerative practices and feedstock origins meticulously: nutrient budgets, manure handling, etc. USDA guidelines now matter for emissions modeling.
- Ensure eligible infrastructure and processes meet the updated modeling standard; reach out to advisors for model inputs.
- Monitor future updates: beef and poultry manure expected for inclusion; modeling updates from DOE (45ZCF-GREET) anticipated in late 2026.
- Plan production timing—production in 2025 qualifies under safe harbor rules; eligible producers should consider production schedules before changes fully enforced.
## Broader implications
- These changes reflect growing environmental, supply chain, and domestic production policy goals within IRS / Treasury guidance. Clean fuels are a priority under WFTC.
- Producers out of compliance or uncertain feedstock sourcing now face greater risk of loss of credit or stricter scrutiny.
- Interactions with state credits or incentives may shift; states often add emission-based or biofuel support policies too—watch for alignment or mismatch.
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Notice 2026-53 indicates Section 45Z is enforcing stricter emission conventions but also offering transitional relief—producers with forestry or agriculture experience can opt into low emission rates and manure practices to leverage higher credit. Stay ahead of rule changes, monitor deadlines, and document everything.