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Gas Use Tax

Legal References

Electronic Services


The Gas Use Tax Act is imposed on persons who purchase natural gas from outside of Illinois for their own use (not for resale). Purchasers may pay the Gas Use Tax to their distributor or may elect to become a self-assessor.

Tax Rate

Use the Tax Rate Database to determine the rate for delivering suppliers and self-assessing purchasers.

Allowable Exemptions

There are six exemptions that apply only to Gas Use Tax. The exemptions are for natural gas:

  • used by governmental bodies or entities operated and organized exclusively for charitable, religious, or educational purposes who have been issued a tax exemption identification number by IDOR.
  • used in the production of electric energy. This does not include gas used in the general maintenance or heating of an electric energy production facility or other structures.
  • used in petroleum refinery operations.
  • used in liquefaction and fractionation processes that produce value-added natural gas by-products for resale.
  • used in the production of anhydrous ammonia and downstream nitrogen fertilizer products for resale.
  • used by a business located in an enterprise zone.

Local Taxes

Municipalities may impose a tax on persons engaged in the business of distributing, supplying, furnishing, or selling natural gas for use or consumption (and not for resale) within the corporate limits of the municipality. The rate cannot exceed 5 percent of gross receipts (8 percent in cities with populations greater than 500,000). The Department of Revenue does not collect these locally imposed taxes.

Additional Registration Requirements

If you are a self-assessor, in addition to filing Form REG-1, Illinois Business Registration Application, you must file REG-1-G, Gas Use Tax Self-Assessing Purchaser. You may also register using our on-line Business Registration program.

Form/Filing & Payment Requirements

Return -Form RG-1, Gas Tax Return, is filed monthly, quarterly, or annually, based on the taxpayer’s average monthly liability. The department determines how often a return must be filed.

  • A monthly return is due on or before the 15th day of the month following the month for which the return is filed.
  • A quarterly return is due on or before the last day of the month following the quarter for which the return is filed.
  • An annual return is due on or before January 31 of the year following the year for which the return is filed.

Quarter-monthly payments - Companies that have an average monthly liability of $10,000 or more must send quarter-monthly payments. Payments are due on the 7th, 15th, 22nd, and the last day of the month. Taxpayers who mail their quarter-monthly remittances to the department must complete Form RPU-50, Public Utilities Quarter-Monthly Payment - Gas Tax. Do not send Form RPU-50 if you remit your payment by EFT.

A taxpayer that had an annual liability of $20,000 or more in the preceding calendar year must remit any tax payment by Electronic Funds Transfer (EFT).


  • Call us at: 1 217 782-5906
  • Mail Form RG-1 to:
    PO BOX 19019
    SPRINGFIELD IL 62794-9019