Illinois toll roads are cashless roads. The Illinois Tollway network — the Jane Addams Memorial Tollway past O'Hare, the Tri-State Tollway down the west side, the North-South Tollway (I-355), and the Eisenhower/Obama Parkway (I-88) out to Aurora — takes no cash at the plaza: "Cashless tolling, cash not accepted." is the schedule's own words (S2). The one holdout is the Chicago Skyway, where cash still rides in designated lanes — "CASH is ONLY accepted in designated 'CASH' lanes" (S4). Toll Math prices the whole set from the published schedules: pick your road, your axle count, and how you pay, and it totals your trip plaza by plaza.
Every plaza on the Tollway system is priced three ways, and the columns are not close. The published schedule carries one rate for I-PASS — the region's transponder, an E-ZPass member — a higher one for Pay By Plate, the plate-billing you get with no transponder, and a higher one still for Invoice. The proposed 2027 schedule prices a passenger vehicle at the South Beloit plaza on the Jane Addams Memorial Tollway at $1.50 with I-PASS, $2.25 with Pay By Plate, and $3.00 by Invoice (S3); the current 2026 truck schedule lists the Plum Grove plaza on I-390 at $1.50 with I-PASS against $2.30 paid another way (S2). Rates are set per plaza, not by the mile, so the same road costs different amounts depending on where you enter, exit — and pay.
Those rates are published rates that change: the Tollway schedule states step increases, then adjustments "every two years based on CPI … maximum 8%" beginning 2029-01-01 (S1), and the Skyway has already posted its next step (S4). Toll Math ships a snapshot of the published schedules, prints the date it was taken, and links the official sources — so you can see the gap between paying with a transponder and paying by plate before you decide, and verify current figures before you rely on a total.
Run your Illinois trip — every plaza between your ramps, priced three ways.
| Road | Toll plaza · class · framing | I-PASS | Pay By Plate | Invoice |
|---|---|---|---|---|
| Jane Addams Memorial Tollway | South Beloit plaza · passenger vehicle · proposed eff. 2027-01-01 (S3) | $1.50 | $2.25 | $3.00 |
| Illinois Route 390 Tollway | Plum Grove Road Mainline · small truck, daytime · current, eff. 2026-01-01 (S2) | $1.50 | $2.30 | not in the cited schedule snapshot |
| Chicago Skyway | Skyway toll plaza · 2 axles, peak and off-peak · current (S4) | $8.10 | $8.10 | $8.10 |
Rates: Illinois Tollway published schedules (Illinois Tollway rate hub, 2026 current schedule PDF, proposed 2027 schedule PDF) and the Chicago Skyway; rates change — verify before relying.
Rates as of 2026-11-13.
Toll Math answers it plaza by plaza. It sums the published rate at every toll point on the route you pick — at I-PASS, Pay By Plate, and Invoice prices — and prints the per-trip totals underneath, along with the date its rate snapshot was taken. Illinois rates are set per plaza rather than by the mile (S1), and the Chicago Skyway is a separate authority that charges one flat toll of its own (S4), so a Chicago-area trip can carry tolls from more than one source. The published figures change, so the tool tells you to verify current rates with the official schedules before you rely on a total.
You need a way to pay, not a transponder specifically. The Tollway network is cashless — its schedule states "Cashless tolling, cash not accepted." (S2) — so with no transponder your plate is read and you are billed at the higher Pay By Plate rate, or at the Invoice rate if the bill goes unpaid. I-PASS is the region's transponder and an E-ZPass member program (S1); if you drive Illinois toll roads more than occasionally, the calculator shows what the plate columns cost per trip versus the I-PASS column, and how long it takes a transponder to pay for itself at your trip count.
Same road, same plaza, three prices. The published schedules carry an I-PASS column, a higher Pay By Plate column, and a higher Invoice column. At the South Beloit plaza on the Jane Addams Memorial Tollway, the proposed 2027 schedule prices a passenger vehicle at $1.50 with I-PASS, $2.25 with Pay By Plate, and $3.00 by Invoice — double the I-PASS rate (S3). The current 2026 truck schedule shows the same three-column shape at the Plum Grove plaza on I-390, listed at $1.50 with I-PASS against $2.30 by another payment method (S2). The exact multiplier differs by plaza; Toll Math prints the real numbers side by side.
The North-South Tollway (I-355) is part of the Illinois Tollway system, and that system prices every plaza on its own schedule row rather than by distance (S1). Any extension plazas are therefore priced as additional plaza rows in the published schedule — check the official schedule for the rows it currently lists, and Toll Math prices whatever its snapshot includes. The Chicago Skyway is the genuinely separate one: its own authority, its own flat toll, shown as an informational row (S4).
Not on the Illinois Tollway — the system is cashless and its schedule says so in plain words: "Cashless tolling, cash not accepted." (S2). The exception is the Chicago Skyway, which still takes cash but only in marked lanes: "CASH is ONLY accepted in designated 'CASH' lanes" (S4). Everywhere else, no transponder means a plate-billed Pay By Plate or Invoice rate.
The Tollway's published schedules carry a third, higher rate column for Invoice — the rate applied when a toll is billed because there was no I-PASS account or Pay By Plate registration behind the plate. At the plaza cited in Q3, the proposed Invoice rate is $3.00 against $1.50 with I-PASS (S3). Toll Math shows the Invoice column next to the other two so the cost of waiting for the bill is on screen before you drive.