IRS Form 8864 Guide: Biodiesel & Sustainable Aviation Fuel

Introduction: What is IRS Form 8864?

IRS Form 8864, titled Biodiesel, Renewable Diesel, or Sustainable Aviation Fuels Credit, is an official federal tax document governed by the Internal Revenue Service (IRS). It is filed under Sections 40A, 40B, and 87 of the Internal Revenue Code by producers, blenders, and commercial users of qualifying clean transportation fuels.

This form allows clean energy businesses and agricultural producers to claim valuable general business income tax credits. It incentivizes the domestic production and commercial use of biodiesel, agri-biodiesel, renewable diesel, and advanced Sustainable Aviation Fuel (SAF) to reduce carbon emissions across the transport and aviation sectors.

Purpose of the Form

The federal government utilizes targeted tax credits to offset the higher manufacturing and processing costs associated with refining biofuels and renewable aviation fuels. These credits help clean fuels compete with traditional petroleum-based products.

Form 8864 serves as the official calculator for these income tax incentives. It tallies qualifying gallons sold or used in a commercial trade or business, applies statutory per-gallon credit rates, ensures compliance with EPA and ASTM fuel quality standards, and coordinates the required gross income adjustments mandated under Section 87.

Who Needs to File Form 8864?

You must file Form 8864 if you engaged in qualifying clean fuel production or blending activities during the tax year, including:

• Small Agri-Biodiesel Producers: Registered agricultural producers who manufacture qualifying agri-biodiesel from agricultural crops or animal fats (with production capacity under 60 million gallons annually).
• Biodiesel & Renewable Diesel Blenders: Businesses that produce qualified fuel mixtures by blending pure biodiesel with petroleum diesel, or renewable diesel with conventional liquid fuels, for commercial sale or trade use.
• Sustainable Aviation Fuel (SAF) Producers & Blenders: Companies that produce or blend certified SAF with kerosene for use in commercial or business aircraft.
• Pass-Through Entities & Owners: Partnerships and S corporations that produce qualifying fuel, as well as partners and shareholders receiving a distributive share of the credit on Schedule K-1.

Who Is Exempt / Not Required to File?

You do not need to file Form 8864 under the following circumstances:

• Claiming Excise Tax Refunds: You cannot claim any fuel gallons on Form 8864 that you already claimed (or plan to claim) as an excise tax credit on Form 720 (Schedule C), a refund on Form 8849, or an income tax credit on Form 4136.
• Everyday Retail Consumers: Vehicle drivers or fleet operators purchasing commercially blended biodiesel at retail fuel stations do not qualify.
• Non-Compliant Feedstocks: Fuels produced from uncertified feedstocks, non-biomass sources, or materials that fail to meet EPA registration and ASTM quality specifications.
• Direct Pass-Through Partners with Form 3800 Only: Certain individual partners whose only source of the credit is a Schedule K-1 may report directly on Form 3800 rather than attaching Form 8864, unless specific transfer or entity rules apply.

When to File

Form 8864 is an annual tax schedule attached to your entity’s federal income tax return. The filing deadline coincides with your primary tax return schedule:

• Partnerships (Form 1065) and S Corporations (Form 1120-S): Due March 15 (or mid-September with an extension).
• C Corporations (Form 1120) and Individuals (Form 1040): Due April 15 (or mid-October with a valid extension).
• Fiscal Year Entities: Due by the 15th day of the 3rd or 4th month following the close of the fiscal tax year.

Where and How to File

Form 8864 cannot be filed as an independent, standalone document; it must always be submitted alongside your primary tax return and attached to Form 3800 (General Business Credit).

• Electronic Filing (E-File): When e-filing your corporate or partnership tax return, your tax preparation software will include Form 8864 electronically within the transmission packet.
• Paper Filing: If submitting by mail, place Form 8864 directly behind Form 3800 and your primary tax return. Mail the entire package to the IRS address as per instructions for your principal business location.

Step-by-Step Instructions to Fill Form 8864

Form 8864 requires identifying the fuel category, multiplying eligible gallons by the statutory rate, adjusting gross income, and routing the net credit.

1. Fuel Volume and Rate Calculation

Enter the total number of qualified gallons sold or used in your trade or business in Column (a), then multiply by the statutory rate in Column (b):

Line Item / Fuel Type	Statutory Code & Category	Reporting Rules & Rates
Small Agri-Biodiesel Production	Section 40A Agri-Biodiesel	Report eligible gallons of qualified agri-biodiesel produced and sold. Multiplied by the applicable statutory rate ($0.10 or $0.20 per gallon based on production date).
Biodiesel & Renewable Diesel Mixtures	Section 40A Fuel Blends	Report qualifying gallons of pure biodiesel or renewable diesel blended with conventional fuels (if claiming under income tax rules rather than excise schedules).
Sustainable Aviation Fuel (SAF)	Section 40B SAF Mixtures	Report gallons of certified SAF blended with kerosene achieving at least a 50% lifecycle greenhouse gas reduction ($1.25 base rate plus supplementary emissions reduction bonus).

2. Section 87 Gross Income Inclusion

Under Section 87 of the Internal Revenue Code, the total credit calculated from your direct production and blending activities must be included in your gross income on your tax return (e.g., on Form 1120 or Schedule C). You must report this amount as taxable “Other Income.”

3. Pass-Through Allocations and Form 3800 Transfer

• Line 10 (Pass-Through Credits): Enter credits received on Schedule K-1 from partnerships, S corporations, estates, or trusts.
• Line 11 (Total Credit): Partnerships and S corporations stop here and allocate the credit to owners on Schedule K. All other corporations and individuals transfer the credit to Form 3800.
• Lines 12–13 (Cooperatives & Trusts): Cooperatives allocate patron shares and report the net remaining credit on Form 3800.

Required Documents and Information Needed Before Filling

Keep the following technical and compliance records in your audit files to substantiate all Form 8864 claims:

• Certificate for Biodiesel / Renewable Diesel: An official certificate from the fuel producer identifying the product, percentage of agri-biodiesel, and verification of ASTM D6751 or ASTM D975 compliance.
• Certificate for SAF Synthetic Blending Component: Formal producer certification verifying that Sustainable Aviation Fuel meets ASTM D7566 or D1655 standards and satisfies CORSIA or equivalent lifecycle greenhouse gas reduction thresholds.
• Statement of Reseller: Required if the fuel was purchased from a middleman or reseller rather than directly from the original fuel refiner.
• EPA Registration Documentation: Proof that the fuel and all additives meet Clean Air Act EPA registration rules.
• IRS Form 637 Registration: Proof of registration for credit transfer elections or fuel activities.

Common Mistakes to Avoid

• Double Dipping with Excise Returns: Claiming credits on Form 8864 for the exact same fuel gallons already claimed on Form 720 (Schedule C), Form 8849, or Form 4136. Federal law strictly prohibits claiming both an excise refund and an income tax credit for the same fuel.
• Forgetting the Section 87 Income Add-Back: Failing to include the calculated credit in your gross taxable income, leading to automated IRS underpayment penalties.
• Missing Quality Certifications: Submitting claims without possessing signed producer certificates or ASTM laboratory testing verifications.
• Claiming Unqualified Feedstocks: Claiming agri-biodiesel or SAF derived from non-qualifying feedstocks, fossil materials, or foreign inputs that violate statutory origin rules.

Penalties for Non-Filing or Errors

Submitting improper or fraudulent clean fuel credit claims carries severe tax and financial consequences:

• Credit Recapture and Back Taxes: Disallowed credits will be removed, triggering immediate tax deficiencies and back tax assessments.
• Section 6662 Accuracy Penalties: A 20% penalty for substantial understatement of income tax or negligence in verifying fuel certificates.
• Section 6700 False Statement Penalties: Substantial fines for making fraudulent statements or issuing false producer certificates regarding fuel eligibility.
• Compounding Interest: Mandatory IRS interest charged on all unpaid tax liabilities from the original return due date.

Related Forms and Schedules

• Form 3800: General Business Credit (where the Form 8864 credit is consolidated against regular tax limits).
• Form 720: Quarterly Federal Excise Tax Return (Schedule C).
• Form 8849 (Schedule 3): Certain Fuel Mixtures and the Alternative Fuel Credit.
• Form 4136: Credit for Federal Tax Paid on Fuels.
• Form 637: Application for Registration for Certain Excise Tax Activities.
• Schedule K-1 (Form 1065 / 1120-S): Partner’s or Shareholder’s Share of Income, Deductions, and Credits.

Frequently Asked Questions (FAQs)

1. What is the difference between claiming fuel credits on Form 720 versus Form 8864?

Form 720 allows blenders to take an immediate excise tax credit against their quarterly fuel excise tax liabilities. Form 8864 claims the incentive as a general business income tax credit on your annual income tax return. You cannot claim both for the same gallons.

2. Why must I include the credit amount in my gross taxable income?

Under Section 87 of the Internal Revenue Code, the federal biofuel credit is treated as taxable income. This prevents taxpayers from receiving a double benefit (receiving a tax credit while simultaneously deducting the full gross cost of producing the fuel).

3. What qualifies as Sustainable Aviation Fuel (SAF)?

SAF is a liquid hydrocarbon fuel designed for aircraft that meets ASTM aviation standards, is derived from biomass or renewable waste feedstocks, and is certified to achieve at least a 50% lifecycle greenhouse gas reduction compared to conventional jet fuel.

4. Can clean fuel credits on Form 8864 be sold or transferred?

Yes. Under Section 6418 transferability rules, eligible corporate taxpayers and partnerships can elect to transfer (sell) qualifying general business credits to an unrelated third-party buyer for cash, provided IRS pre-filing registration requirements are met.

5. Is the credit on Form 8864 refundable?

No. Form 8864 produces a nonrefundable general business credit. It can reduce your income tax liability to zero, and any excess unused credit can generally be carried back 1 year and forward up to 20 years on Form 3800.

Conclusion: Key Takeaways

IRS Form 8864 is a powerful tax mechanism supporting the production and commercial adoption of biodiesel, renewable diesel, and Sustainable Aviation Fuel. To successfully capture these incentives, producers and blenders must maintain rigorous ASTM and EPA certifications, ensure no double-claiming on excise tax returns, report the credit as taxable income under Section 87, and route the final credit through Form 3800.