Tax Tips · Credits

By File720Online Editorial Team · April 17, 2026

Form 720 Schedule C Credits: How to Claim Excise Tax Credits

Many businesses overpay excise taxes because they don't claim the credits they're entitled to on Schedule C. If you paid excise tax on fuel or goods later used for nontaxable purposes, you may be able to reduce — or eliminate — your quarterly liability.

File Form 720Form 8849 Refund Guide

Quick Answer

Schedule C credits reduce your Form 720 excise tax liability for taxes already paid on goods or fuel used for nontaxable purposes. Credits require documentation proving the original tax payment and the qualifying nontaxable end use.

How Schedule C Credits Work

The logic behind Schedule C credits is straightforward: excise taxes are designed to be paid on goods that are consumed in taxable ways. When an excise tax is paid but the goods are ultimately used in a nontaxable manner, the taxpayer is entitled to a credit.

On Form 720, your gross excise tax liability is calculated on Schedule I (Parts I and II). Schedule C credits are then subtracted from that gross liability to arrive at your net tax due. If credits exceed gross liability, you can carry the overage forward or claim a refund via Form 8849.

Credits can only be claimed by the party who originally paid the excise tax. If you are a distributor who bought fuel with the tax already paid, you generally cannot claim the credit — the original payer (the terminal operator or importer) holds that right, unless the credit is specifically transferable under IRS rules.

Types of Schedule C Credits

Fuel Used in Nontaxable Purposes

Who Qualifies

Sellers who paid excise tax on fuel later sold for off-road, government, or exempt use

Calculation

Taxable gallons × applicable excise tax rate = credit amount

Examples

Diesel sold to farms for agricultural vehicles, fuel sold to state/local governments, fuel used in construction equipment

Exported Fuel

Who Qualifies

Exporters who paid U.S. excise tax on fuel that was subsequently exported

Calculation

Gallons exported × rate paid when the tax was paid

Examples

Gasoline exported to Canada or Mexico after excise tax was paid domestically

Fuel Sold to Tax-Exempt Organizations

Who Qualifies

Sellers who paid excise tax on fuel sold to 501(c)(3) organizations, Indian tribal governments, or qualified blood collector organizations

Calculation

Taxable gallons sold to exempt organizations × rate paid

Examples

Diesel sold to a registered nonprofit organization for their fleet vehicles

Blended Fuels (Biodiesel, Ethanol)

Who Qualifies

Blenders of taxable fuels with qualifying biodiesel, ethanol, or other exempt substances

Calculation

Calculated based on the proportion of exempt component in the blend

Examples

Blending gasoline with ethanol creates a partially exempt mixture

Documentation Required for Credits

Every credit claimed on Schedule C must be supported by documentation. At minimum, you need:

  • ✓Proof that excise tax was paid (purchase records, deposit confirmations, prior Form 720 filings)
  • ✓Records identifying the specific fuel or goods for which the credit is claimed
  • ✓Evidence of the nontaxable end use (export documents, sales receipts showing exempt purchaser, agricultural use records)
  • ✓Exemption certificates from qualifying exempt buyers (government agencies, nonprofits)
  • ✓Calculations showing how the credit amount was determined

Related Articles

Form 8849 Refund Guide

Claiming cash refunds for overpaid excise tax

Fuel Excise Tax Guide

Which fuel taxes are subject to credits

Recordkeeping Requirements

What records support credit claims

Frequently Asked Questions

What is Schedule C on Form 720?
Schedule C of Form 720 is the section where you claim credits against your quarterly excise tax liability. Credits reduce the net amount of excise tax you owe. If your credits exceed your tax liability for the quarter, you can either carry the excess forward to the next quarter or file Form 8849 to claim a cash refund.
Who can claim excise tax credits on Schedule C?
Credits are generally available to businesses that paid excise taxes on goods or fuel that were subsequently used for nontaxable purposes. This includes fuel sold for off-road use, fuel sold to exempt organizations, fuel that was exported, and fuel blended with exempt substances. The key requirement is that the excise tax was originally paid and the subsequent use was nontaxable.
What is the difference between Schedule C credits and Form 8849?
Schedule C credits on Form 720 reduce your current quarter's excise tax liability. Form 8849 (Claim for Refund of Excise Taxes) is used to claim a cash refund for excise taxes that exceeded the tax liability or were paid in error. If you consistently have more credits than tax liability, Form 8849 is more efficient. If you have ongoing tax liability, Schedule C credits are the better mechanism.
Do I need to keep records to support Schedule C credits?
Yes. You must maintain documentation proving that the excise tax was paid and that the qualifying nontaxable use occurred. For fuel credits, this includes purchase records showing the excise tax paid, sales records identifying the nontaxable end use, and, for sales to exempt organizations, a certificate from the exempt buyer confirming their exempt status. The IRS may request this documentation during an audit.
Can I claim credits for excise taxes paid in a prior quarter?
Credits must generally be claimed in the quarter when the nontaxable use occurs, not when the tax was originally paid. If you missed credits in prior quarters, you can file an amended Form 720 for those quarters, or in some cases file Form 8849 to claim a refund. The general statute of limitations for refund claims is 3 years from the date the original return was filed.

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Disclaimer: The information provided in this article is for general informational purposes only and should not be relied upon as legal, tax, or professional advice. Tax laws and regulations are subject to change, and their application can vary based on individual circumstances. Consult a qualified tax professional or attorney for advice specific to your situation. File720Online is an IRS-authorized e-file provider and does not provide legal or tax advice.