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IFTA fuel tax rates and information for Illinois
| Diesel | $0.4670 per gallon |
| Gasoline | $0.3920 per gallon |
Rates effective as of 2025-10-01. Rates are subject to change quarterly.
Abbreviation
IL
Country
United States
Region
Midwest
Timezone
Central
When traveling through Illinois, you may also need to track miles in these neighboring jurisdictions:
Illinois is a member of the International Fuel Tax Agreement (IFTA). Motor carriers operating qualified vehicles in Illinois must report all miles traveled and fuel purchased in the state on their quarterly IFTA returns.
Fuel purchased in Illinois generates a tax credit at the rate of $0.4670/gallon for diesel. If you travel more miles in Illinois than the fuel you purchased would cover, you'll owe additional tax. If you purchased more fuel than you used, you'll receive a credit.
Use our free calculator to determine your tax liability for IL.