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United States · IL
Illinois
IFTA fuel tax rates, jurisdiction details, and neighboring states for Illinois.
Current tax rates
Diesel
$0.4670/gal
Gasoline
$0.3920/gal
Effective 2026-04-01. Per gallon, USD.
Jurisdiction
Code
IL
Country
United States
Region
Midwest
Timezone
Central
Neighboring jurisdictions
Trips through Illinois commonly cross into these. Check their rates if you log miles there too.
IFTA in Illinois
Illinois is a member of the International Fuel Tax Agreement. Carriers operating qualified vehicles in Illinois 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/gal/gal for diesel. If you put more miles on the road in Illinois than the fuel you purchased there would cover, you owe additional tax. If you purchased more fuel than you used, you receive a credit.
Calculate IL