Interstate User Diesel Fuel Tax (DI) License

The California Interstate User Diesel Fuel Tax (DI) License is issued to persons who operate diesel-powered vehicles and whose interstate travel is restricted to Mexico and California, or to persons who are not based in an International Fuel Tax Agreement (IFTA) jurisdiction. Under the Diesel Interstate Carrier (DI) program, every person using diesel fuel to operate a qualified motor vehicle within and outside this state shall pay a tax for every gallon of diesel fuel used in this state. Generally, a person will be required to hold a Diesel Interstate Carrier license if the person operates at least one qualified motor vehicle powered by diesel fuel and travels only in California and Mexico.

If you operate a qualified motor vehicle in California and any other US State, you should register for an International Fuel Tax Agreement (IFTA) License.

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Contact Us

If you have questions regarding this program or need to register with the CDTFA, please contact the Motor Carrier Office at the following addresses or telephone number:

Motor Carrier Office, MIC: 65
California Department of Tax and Fee Administration
PO Box 942879
Sacramento, CA 94279-0065

The Motor Carrier Office is located at 1030 Riverside Parkway in West Sacramento. The office is open to the public from 8:00 a.m. to 5:00 p.m., Monday through Friday, except state holidays.

Telephone 1-800-400-7115
(TTY: 711)

Follow the prompts to the menu for "Other taxes and fees" and "Special Taxes and Fees"

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