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Texas Taxes

International Fuel Tax Agreement (IFTA)

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This is not a separate tax or fee. This is an agreement that provides for the consolidated reporting of motor fuels (i.e., Gasoline, Diesel Fuel, Liquefied Gas) taxes for qualifying commercial motor vehicles traveling in more than one state or province of Canada.

***EFFECTIVE JULY 1, 2013***

As of July 1, 2013, the IFTA Interest Rate will change to 5% annually or 0.417% monthly (0.00417).

The current 12% annual or 1% monthly interest rate will apply to outstanding balances on and before June 30, 2013.

The variable rate effective on July 1, 2013, will apply to all outstanding balances on July 1, 2013, through December 31, 2013.

Example: Interest on a $100 underpayment for the 131 return period accumulates at 1% per month from May 1, 2013, through June 30, 2013, and interest accumulates at the new variable rate beginning July 1, 2013.

Due Date - April 30th underpayment $100

Month Interest Rate Interest Due
May 1st 1% X $100.00 $1.00
June 1st 1% X $100.00 $1.00
July 1st .417% X $100.00 $0.42


Tax rate is set by each of the member jurisdictions. Interstate carriers based in Texas report fuel tax paid in all member jurisdictions.

Due Date

Quarterly: last day of the month following the end of the calendar quarter.

Biodiesel Fuel (PDF, 205KB) - Information on how to report Biodiesel Fuel on your IFTA quarterly return.

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