Illinois IFTA Calculator
Example rate: ~$0.738/gallon. Enter your actual miles and gallons below to estimate what you owe.
Rates shown are illustrative example rates for this demo calculator. Pull current quarterly rates from IFTA Inc. before filing.
| State | Taxable Gal. | Tax Owed |
|---|---|---|
| IL | 600.0 | $442.80 |
Running Freight Through Illinois
Highest Fuel Tax in the Region
Illinois runs one of the highest fuel tax rates in the entire IFTA system, so Illinois miles typically account for a larger share of quarterly liability than the same mileage in most neighboring Midwest states.
Illinois Tollway System
The Illinois Tollway covers major routes in and around Chicago, and commercial vehicles pay meaningfully more than passenger cars, so carriers running the Chicago area regularly should factor toll costs into their per-trip estimates.
Chicago Freight Interchange
I-80, I-55, I-90, and I-94 all converge near Chicago, making it one of the busiest freight interchanges in the country, so carriers should expect heavy truck traffic and congestion on any route through the metro area.
IFTA and Trucking in Illinois: What to Know
Illinois carries the highest example fuel tax rate in this batch, and Chicago's position as a national freight and rail interchange makes the state a near-mandatory stop for carriers running the Midwest. I-80, I-55, I-90, and I-94 all converge in the Chicago area, and the Illinois Tollway adds a real toll cost on top of an already high fuel tax. Winter weather across the state, particularly lake-effect snow near Chicago, is a serious seasonal factor for anyone running Illinois regularly.
IFTA Filing for Illinois Miles
Illinois participates in IFTA like every other member jurisdiction, so a carrier based outside the state reports Illinois miles and any fuel purchased in Illinois on their regular quarterly return through their home base state rather than filing a separate Illinois return. Because Illinois carries such a high per-gallon rate, it's especially important to track Illinois mileage and fuel purchases accurately, since even a small reporting error here has a bigger dollar impact than the same mistake would in a lower-rate state.
Weigh Stations and Enforcement
The Illinois Department of Transportation and Illinois State Police operate fixed weigh stations along I-80, I-55, I-90, and I-94, with some of the highest-volume checkpoints in the country given how much freight funnels through the Chicago area.
Mobile enforcement units and roadside inspections are also common on secondary routes around Chicago, so carriers trying to avoid tolls or congestion by taking alternate roads should not assume lighter enforcement away from the tollway system.
Tolls and Route Planning
The Illinois Tollway covers a significant share of the highway network in and around Chicago, and commercial vehicles pay substantially more than passenger cars at each plaza, which adds up quickly for carriers running the metro area regularly. Combined with the state's high fuel tax, Illinois can be one of the more expensive states to operate in on a per-mile basis, so carriers should build both toll and fuel costs into their Chicago-area rate calculations rather than estimating off mileage alone.
Weather and Seasonal Planning
Illinois winters bring real snow and ice across the state, and the Chicago area in particular can see lake-effect snow off Lake Michigan that adds unpredictable, localized heavy snowfall on top of general winter storm systems moving through the Midwest.
Downstate Illinois sees a milder version of the same winter pattern along with hot, humid summers, and severe thunderstorms are common in spring and early summer across the state, so carriers running Illinois in these seasons should watch regional weather alerts rather than relying on a single statewide forecast.
Carriers Running Illinois Freight
“Chicago is unavoidable if you run the Midwest, so I just build the tollway cost into every quote instead of fighting it. Fighting it wastes more time than it saves.”
“Lake-effect snow near Chicago caught me off guard my first winter running this lane. Now I check local conditions separately from the statewide forecast every time.”