What E-PASS is and how it works on Chicago expressways

E-PASS is an electronic toll collection system used on the Illinois Tollway system, which includes the Chicago area's major expressways: the Tri-State Tollway (I-94/I-294/I-80), the Reagan Expressway (I-90), the Stevenson Expressway (I-55), and the Eisenhower Expressway (I-290). Instead of stopping at a toll booth to hand over cash or a card, you mount a small transponder on your windshield. When you drive through a toll plaza, the transponder communicates with overhead readers, and the toll is deducted from a prepaid account you set up with the Illinois Tollway.

The system is designed to move traffic faster and reduce congestion at toll plazas. Vehicles with an active E-PASS transponder go through dedicated lanes where tolls are charged automatically. If you don't have E-PASS, you can still use cash lanes or pay-by-plate (where the tollway photographs your license plate and bills you later), but E-PASS typically offers lower toll rates and the convenience of not stopping.

E-PASS accounts are managed through the Illinois Tollway's website at illinoistollway.com. You can set up an account, add funds, check your balance, and view your toll history online. The transponder itself is a small device about the size of a deck of cards that you mount on your windshield, usually behind the rearview mirror.

Key Takeaways

  • E-PASS is an electronic toll payment system for Chicago-area expressways that uses a windshield transponder to charge tolls automatically as you drive through toll plazas.
  • You must set up an account on illinoistollway.com, purchase or receive a transponder, and prepay funds into your account before you can use E-PASS.
  • E-PASS toll rates are lower than cash or pay-by-plate rates, and your account can be set to automatically replenish when the balance drops below a certain amount.
  • If your transponder is lost, damaged, or not working, you can request a replacement through your online account or by calling the Illinois Tollway customer service line.
  • Vehicles registered to you can be added to your E-PASS account, and you can manage multiple vehicles under one account if needed.

Setting up an E-PASS account and getting a transponder

To set up an E-PASS account, go to illinoistollway.com and select the option to open a new account. You will need to provide your name, address, phone number, email, and payment method (credit card, debit card, or bank account). The Illinois Tollway will ask you to choose an initial prepaid amount—typically $25 to $100—which becomes your account balance. This is the pool of money from which tolls are deducted each time you pass through a toll plaza.

Once your account is created, you can order a transponder. The Illinois Tollway will mail you one at no charge, or you can pick one up at a customer service center if you need it when ready. The main customer service center is located at 2700 Ogden Avenue in Aurora, Illinois. When your transponder arrives, you will set up it through your online account by entering the device number. The transponder should be mounted on the inside of your windshield, usually behind the rearview mirror, in a position where overhead readers can detect it.

If you already have a vehicle registered with the Illinois Secretary of State, you can link that vehicle to your E-PASS account during setup. This tells the tollway which vehicle the transponder is assigned to. If you later buy a different car or want to use E-PASS in multiple vehicles, you can add additional vehicles to your account and request additional transponders.

How tolls are charged and how to manage your account balance

Every time you drive through a toll plaza with an active E-PASS transponder, the toll amount is deducted from your account balance in real time. The amount you pay depends on the specific toll plaza and your vehicle class (passenger car, motorcycle, or commercial vehicle). E-PASS rates are typically 20 to 30 percent lower than cash rates, which is the main financial incentive to use the system.

Your account balance can be managed through your online account at illinoistollway.com. You can log in anytime to see your current balance, view recent toll transactions, and add funds manually. Most E-PASS accounts are set up with automatic replenishment, which means when your balance drops below a threshold you choose (often $10 or $25), the system automatically charges your payment method to bring your balance back up to a set amount, usually $50 or $100. This prevents your account from running empty while you are driving.

You can turn automatic replenishment on or off through your account settings. If you prefer to add funds manually, you can do that at any time through the website. The Illinois Tollway also accepts payments by phone at 1-800-UC-IPASS (1-800-824-7277) if you need to add funds outside of business hours.

What happens if your transponder stops working or is damaged

If your E-PASS transponder is not working, you may notice that you are being charged cash or pay-by-plate rates instead of E-PASS rates when you pass through toll plazas. This can happen if the transponder battery has died, the device was damaged, or it was mounted in a position where the overhead readers cannot detect it. Check your online account or your toll receipts to see if tolls are being charged at the correct rate.

If you suspect your transponder is not working, first try remounting it in a different position on your windshield—sometimes moving it slightly can restore the signal. If that does not help, log into your account and request a replacement transponder. The Illinois Tollway will mail you a new one at no charge, and you can set up it through your account once it arrives. In the meantime, you can still use the toll plazas; you will just pay the higher cash or pay-by-plate rate.

If your transponder is lost or stolen, report it to the Illinois Tollway through your online account or by calling 1-800-UC-IPASS. Deactivating a lost transponder prevents someone else from using it on your account. You can then request a replacement device.

E-PASS rates compared to cash and pay-by-plate tolls

The Illinois Tollway offers three ways to pay tolls: E-PASS, cash, and pay-by-plate. E-PASS rates are the lowest of the three. For example, a passenger vehicle might pay $1.50 with E-PASS, $2.00 with cash, or $2.50 with pay-by-plate for the same toll plaza crossing. The exact amounts vary by location and vehicle type, but the discount for E-PASS is consistent across the system.

Pay-by-plate is a system where the tollway photographs your license plate as you drive through a toll plaza without stopping, and bills you later by mail. This is convenient if you do not have an E-PASS transponder, but the toll rate is higher than E-PASS. Cash lanes still exist at some toll plazas, but they are becoming less common as the tollway shifts toward all-electronic collection.

Over time, the savings from E-PASS rates add up. A commuter who crosses the same toll plaza twice a day, five days a week, could save $50 to $100 per month by using E-PASS instead of cash or pay-by-plate. For this reason, E-PASS is worth setting up if you regularly use Chicago-area expressways.

Using E-PASS with rental cars and borrowed vehicles

If you rent a car in the Chicago area, you have two options for paying tolls. Some rental car companies offer E-PASS transponders in their vehicles, and you can use them the same way you would use your own—the rental company's account covers the toll, and you reimburse them when you return the car. Check with your rental company before you pick up the vehicle to see if E-PASS is available.

If the rental car does not have an E-PASS transponder, you can use pay-by-plate. Drive through any toll plaza without stopping, and the tollway will photograph your license plate and send a bill to the rental car company's address. The rental company will then bill you for the toll charges. This is the most common way renters handle tolls in the Chicago area.

If you borrow a friend's car, you should not use your own E-PASS transponder in their vehicle because your account is linked to your registered vehicle. Instead, ask your friend if their car has a transponder, or use pay-by-plate. If you frequently borrow the same vehicle, you can add it to your E-PASS account and request a second transponder for that car.

Troubleshooting common E-PASS problems

If you set up an E-PASS account but your transponder is not being read at toll plazas, check the following: First, make sure the transponder is mounted on the inside of your windshield, behind the rearview mirror, with the label facing outward. Second, confirm that your account is active and your balance is not zero. Third, verify that the vehicle you are driving is registered to your E-PASS account. If you recently bought a new car, you may need to update your account with the new vehicle information.

If you are being charged at the wrong rate (for example, paying cash rates instead of E-PASS rates), check your online account to see if your transponder is still active. Transponders have batteries that last about seven years. If your transponder is older than that, it may be time to request a replacement. You can also call the Illinois Tollway customer service line at 1-800-UC-IPASS to troubleshoot the issue.

If you see charges on your account that you do not recognize, log into your account and review your toll history. Each transaction shows the date, time, toll plaza, and amount. If you see a charge that does not match a trip you made, contact the Illinois Tollway to dispute it. Keep records of your trips so you can verify charges if needed.

Frequently Asked Questions

Can I use the same E-PASS transponder in multiple vehicles?

No, each transponder is linked to one vehicle. If you want to use E-PASS in multiple vehicles, you need to add each vehicle to your account and request a separate transponder for each one. You can manage all of them under a single account and prepaid balance.

What happens if my E-PASS account balance runs out while I am driving?

If your balance reaches zero, your transponder will stop working and you will be charged at the pay-by-plate rate instead. The tollway will photograph your license plate and bill you. To avoid this, set up automatic replenishment so your account refills when the balance drops below a certain amount.

Do I have to use E-PASS, or can I still pay cash?

Cash lanes are becoming less common on Chicago expressways, but some toll plazas still offer them. Pay-by-plate is available at all toll plazas and is the most common alternative to E-PASS. You are not required to use E-PASS, but the toll rates are lower if you do.

How long does it take to receive an E-PASS transponder in the mail?

The Illinois Tollway typically mails transponders within one to two weeks of your order. If you need one when ready, you can visit the customer service center in Aurora to pick one up in person. Until your transponder arrives, you can still use the expressways and pay by pay-by-plate.

Can I transfer my E-PASS account if I move out of Illinois?

Your E-PASS account remains active as long as you have a balance and an active transponder. If you move and no longer use Chicago expressways regularly, you can close your account and request a refund of any remaining balance through your online account or by calling customer service.