About Fuel Tax

Fuel Reporting in Colorado 

Fuel Tax Returns are due monthly on the 26th day of the month following the activity, or the next business day if the 26th is on a weekend or holiday. Colorado requires the reporting of fuel available within the state, this includes all blending components of Fuel, Aviation Fuel, Gasoline, and Special Fuels (including diesel, biodiesel, CNG, and LNG), whether it is for motor fuel use or off-road use. LPG has slightly different filing requirements.  

There are three different returns that are required based on your fuel tax license.

  • Fuel Terminal Operator Return - If you operate a Federal or State qualified Terminal, whether you own the fuel within the terminal or not.
  • Fuel Carrier Return - If you are a commercial carrier, hauling fuel that you do not own.
  • Fuel Distributor Tax Return - Fuel distributors must report all activity of fuel within the state.

Recordkeeping Requirements

Colorado law requires fuel distributors, carriers, and terminal operators to keep true and complete records of their returns, receipts, disbursements, and activities for at least three years after filing of returns.

More Fuel Tax Information

For more fuel tax information, select an option in the menu to the left. Additional information is also available in the Fuel Tax Guide