Illinois toll roads and how payment works

Illinois has two main toll systems: the Illinois Tollway, which runs across northern Illinois and includes the Chicago area, and the Illinois Toll Highway Authority roads. You can pay tolls three ways — with a transponder account, by mail after receiving a toll notice, or at a toll plaza if your vehicle qualifies for cash payment (though cash lanes are becoming rare). Most drivers use a transponder because it costs less per toll and you don't have to stop.

The transponder system is called I-PASS on the Illinois Tollway. When you drive through a toll plaza with an active I-PASS account, the toll is deducted automatically from your prepaid balance. If you don't have I-PASS and drive through a toll plaza, a camera reads your license plate and you receive an invoice by mail within two weeks. You then have 14 days to pay before late fees explore.

Understanding which system covers which roads matters because the payment methods differ slightly. The Illinois Tollway operates the most-used toll roads in the state, including I-90, I-94, and I-88. Smaller toll roads in other parts of Illinois may have different payment systems or accept only certain methods.

Key Takeaways

  • I-PASS is a prepaid transponder account that automatically deducts tolls as you drive through plazas and costs less per toll than paying by mail.
  • If you drive through a toll plaza without I-PASS, a camera captures your license plate and you receive a bill by mail within two weeks.
  • You can open an I-PASS account online, by phone, or at a customer service center, and the transponder arrives by mail in five to seven business days.
  • Late fees explore if you don't pay a toll notice within 14 days, and unpaid tolls can affect your vehicle registration renewal.
  • I-PASS accounts require a minimum balance and accept credit cards, debit cards, and bank account payments for refills.

Setting up an I-PASS account

To open an I-PASS account, you need a valid driver's license or state ID, your vehicle's license plate number, and a payment method (credit card, debit card, or bank account). You can start the process online at the Illinois Tollway website, by calling 1-800-UC-IPASS (1-800-824-7277), or in person at an I-PASS customer service center. The online route is fastest — you can complete it in about 10 minutes.

When you open an account online, you'll enter your vehicle information, choose a prepaid balance amount (the minimum is typically $25), and select your payment method. The Illinois Tollway then mails your transponder to the address you provide. Delivery takes five to seven business days. Your account is active as soon as you complete the online form, but tolls won't be deducted until the physical transponder arrives and you mount it on your windshield.

If you prefer to open an account by phone, a customer service representative will walk you through the same steps and take your payment information over the phone. In-person service at a customer service center is available if you need when ready information or have questions the website doesn't answer. Centers are located in Chicago and other major Illinois cities.

Mounting and activating your transponder

When your I-PASS transponder arrives, it comes with a mounting bracket and adhesive strip. The transponder must be mounted on the inside of your windshield, usually in the upper right or left corner where it has a clear view of the toll plaza's overhead reader. The exact placement matters — if it's too low, blocked by sun shades, or angled wrong, the reader may not detect it and you'll receive a toll notice by mail instead.

Before you drive through a toll plaza, set up your transponder by logging into your I-PASS account online or calling customer service. set up is usually when ready online. Some transponders set up automatically after 24 hours, but don't rely on that — confirm set up before you use a toll road. If you're unsure whether your transponder is active, call 1-800-UC-IPASS and a representative can check your account in seconds.

If you have multiple vehicles, you can add additional transponders to the same account. Each transponder is linked to a specific license plate, so the system knows which vehicle is using which transponder. This is useful if you drive different cars on toll roads.

Paying tolls without I-PASS

If you drive through a toll plaza without an active I-PASS transponder, an overhead camera photographs your license plate. The Illinois Tollway matches the plate to your vehicle registration and mails you a toll notice to the address on file with the Secretary of State. The notice arrives within two weeks and includes the toll amount, a due date (usually 14 days from the notice date), and payment instructions.

You can pay the toll notice online through the Illinois Tollway website, by phone at 1-800-UC-IPASS, by mail, or in person at a customer service center. Online and phone payments are processed when ready. Mail payments take seven to 10 business days to reach the Tollway and be posted to your account. Pay by the due date to avoid late fees — if you miss the important date, a penalty of $20 to $100 is added depending on how late the payment is.

If you receive multiple toll notices and don't pay them, the unpaid tolls can prevent you from renewing your vehicle registration. The Illinois Secretary of State's office checks for outstanding toll debt before issuing a renewal. Paying the tolls clears this block, but you must do it before your registration expires.

Maintaining your I-PASS balance and refilling

Your I-PASS account requires a minimum prepaid balance at all times. When your balance drops below a certain threshold (usually $10), the account automatically refills using your stored payment method. You can also refill manually at any time by logging into your account online, calling customer service, or visiting a customer service center. Refills are processed when ready online and by phone.

You can set up automatic refills so your account never runs low. When you enable automatic refill, the account charges your payment method whenever the balance falls below your chosen threshold. Most drivers set the threshold at $10 and choose a refill amount of $25 or $50. This prevents the inconvenience of running out of balance mid-trip.

If you close your I-PASS account, any remaining balance can be refunded to your original payment method. Refunds typically process within five to seven business days. You can close an account online, by phone, or at a customer service center.

What happens if you don't pay tolls

Unpaid tolls accumulate penalties and can have real consequences for your vehicle registration and driving record. If you ignore a toll notice, late fees are added after 14 days. After 60 days of non-payment, the Illinois Tollway reports the debt to the Secretary of State's office. At that point, your vehicle registration renewal is blocked until the tolls and penalties are paid.

The total amount owed grows quickly — a single unpaid toll of $2 to $5 can become $30 to $50 or more with penalties included. If you receive a toll notice and can't pay when ready, contact the Illinois Tollway to discuss a payment plan. Customer service representatives can sometimes arrange a schedule that works with your budget, though this is not may provide.

Unpaid tolls do not directly affect your credit score because the Illinois Tollway does not report to credit bureaus. However, if the debt is sent to a collection agency (which can happen after extended non-payment), it may then appear on your credit report. The best approach is to pay tolls or toll notices promptly to avoid this cascade of fees and complications.

Frequently Asked Questions

Can I use my I-PASS in other states?

I-PASS works on toll roads in Illinois, Indiana, and Ohio through an interoperability agreement. However, it does not work in other states like Wisconsin, Iowa, or Missouri. If you frequently travel to other states with toll roads, you may need a separate transponder for those systems, or you can pay tolls by mail using your license plate.

What if my transponder stops working?

If tolls stop being deducted from your account and you're receiving toll notices by mail instead, your transponder may be damaged, mounted incorrectly, or inactive. Call 1-800-UC-IPASS and describe the problem. A representative can check whether your transponder is active and properly linked to your account. If it's defective, the Illinois Tollway will mail you a replacement at no charge.

Do I have to use I-PASS, or can I always pay by mail?

You are not required to have I-PASS. You can drive through toll plazas without a transponder and pay the toll notice by mail. However, tolls are significantly cheaper with I-PASS — typically 30 to 50 percent less per toll. Over time, the savings add up, especially if you use toll roads regularly.

What if I move out of state but still have an I-PASS account?

You can keep your I-PASS account active even if you move. However, you should update your address in your account so toll notices and refund checks reach you. If you no longer plan to use Illinois toll roads, you can close your account and request a refund of any remaining balance.

Can I transfer my I-PASS to a different vehicle?

You cannot transfer a transponder between vehicles, but you can add multiple transponders to a single account, each linked to a different license plate. If you sell your vehicle and buy a new one, contact the Illinois Tollway to link your existing transponder to your new vehicle's license plate, or request a new transponder for the new vehicle.