County Motor Fuel Tax

• Statutory - 55 ILCS 5/5-1035.1

Electronic Services

• MyTax Illinois

DuPage, Kane, Lake, McHenry, and Will Counties have imposed a tax on the retail sale of motor fuel.

Use the Tax Rate Database to look up location specific tax rates.

Form CMFT-1, County Motor Fuel Tax Return, is due monthly, quarterly, or annually, based on the taxpayer’s average monthly liability. The department determines how often the return must be filed.

• A monthly return is due the 20th day of the month following the month for which the return is filed.
• A quarterly return is due the 20th day of the month following the quarter for which the return is filed.
• An annual return is due January 20th of the year following the year for which the return is filed.
  

• Form CMFT-1, County Motor Fuel Tax Return  |   Instructions
• Form CMFT-1-X, Amended County Motor Fuel Tax Return  |   Instructions
• Form CMFT-2, Multiple Site Form |   Instructions
• Form CMFT-2-X, Amended Multiple Site Form |   Instructions
  
• FY 2021-21 County Motor Fuel Tax Changes for Lake and DuPage Counties, Effective July 1, 2021
  
  

• Call us at: 1 800 732-8866 or 217 782-3336
• Call TDD: 1 800 544-5304
• Mail your CMFT-1 and CMFT-1-X forms to:
  
  ATTN: COUNTY MOTOR FUEL TAX
  ILLINOIS DEPARTMENT OF REVENUE
  PO BOX 19034
  SPRINGFIELD IL 62794-9034