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Illinois IFTA Calculator

Illinois IFTA fuel tax rates, Q3 2026

Fuel typeRate per gallonChange from last quarter
Diesel$0.7380No change
Gasoline$0.6530No change
Propane (LPG)$0.7200No change
LNG$0.7020No change
CNG$0.5980No change
Biodiesel$0.7380No change
Diesel rate rank among IFTA jurisdictions
3 of 57
Administered by
Illinois Department of Revenue
State agency IFTA page
tax.illinois.gov

Calculate your Illinois IFTA tax

Return due Nov 2, 2026

The state that issued your IFTA license. It appears on your worksheet.

Miles and fuel by jurisdiction
Total miles
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Total gallons
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Fleet MPG
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Diesel tax in neighboring jurisdictions

JurisdictionEffective rate per gallonCompared with here
Iowa (IA)$0.3250-$0.4130
Indiana (IN)$0.6300-$0.1080
Kentucky (KY)$0.3250-$0.4130
Missouri (MO)$0.2950-$0.4430
Wisconsin (WI)$0.3290-$0.4090

Diesel rate by quarter

QuarterRate per gallon
Q3 2026$0.7380
Q2 2026$0.7380

Filing IFTA for Illinois miles

The Illinois Department of Revenue administers IFTA in Illinois. Returns are filed on Form MFUT-15, and licenses, returns, and payments are handled through MyTax Illinois.

Illinois sets its Motor Fuel Use Tax rate in two parts for six-month periods. The rate for July through December 2026 reflects the suspension of the increase that was scheduled for July 1, 2026.

Source: state agency page

Calculate by state