You blew through a toll plaza. Maybe you were merging onto the Tri-State and your I-PASS was sitting on your kitchen counter. Maybe you were in a rental. Maybe you just forgot that tolls exist because you moved here from a state with functioning highways. If you're still adjusting to driving through an Illinois winter, tolls are just one more thing on the list. It happens. And the Illinois Tollway has — to their credit — made it surprisingly straightforward to deal with. Here's every option, what it costs, and the deadlines you actually need to care about.

Pay By Plate is the Illinois Tollway's primary system for paying missed tolls online without a transponder. The important number here is 14 days. You have exactly 14 days from your initial date of travel to settle up and avoid fines and fees entirely. Here's how it works:

One detail people miss: if you've already traveled, you need to backdate your plate information to reflect the beginning date of travel. The system doesn't automatically know when you drove through. You're telling it. You can also add multiple vehicles to a single Pay By Plate account, which is useful if you're managing a household where everyone has opinions about the Eisenhower but nobody has an I-PASS.

If you miss the 14-day Pay By Plate window, the Illinois Tollway doesn't immediately send you to collections. They start mailing invoices — multiple rounds of them — each one giving you another chance to pay before things escalate to a formal violation. To pay an invoice online:

Each invoice includes a per-toll invoicing fee on top of what you originally owed. The longer you wait, the more those fees accumulate. If you ignore the invoices entirely, your unpaid tolls eventually enter the violation process, which brings significantly steeper penalties. The takeaway: even if you missed the 14-day window, paying at the invoice stage is dramatically cheaper than waiting for a violation notice.

If you drive Illinois tollways with any regularity — and if you live here, you do — the real move is getting an I-PASS transponder. Here's why:

You can open an I-PASS account at getipass.com. The transponder itself is a one-time cost, and after that, you're paying half of what everyone in rental cars is paying. Over a year of commuting, that adds up to real money — the kind you could redirect toward things that matter, like a property tax escrow or a very specific Italian beef craving. It also softens the blow when you inevitably get clocked at one of the western suburbs' more aggressive speed traps.

This is worth its own section because it's actively happening right now. The Illinois Tollway has issued warnings about a text message phishing scam where recipients get a message claiming they owe money for unpaid tolls, often listing a specific dollar amount. These texts are not from the Illinois Tollway. The Tollway does not contact customers via text message to collect toll payments. If you receive one of these messages:

The only legitimate ways to pay tolls are through getipass.com, the Illinois Tollway agency site, or by calling customer service directly.

Sometimes the website doesn't cooperate, or your situation is weird enough that a form field can't handle it. For those cases:

A few things customer service can help with that the website sometimes can't:

One more thing: the Chicago Skyway is a separate toll road with its own payment system at chicagoskyway.org. If your missed toll was on the Skyway, the Illinois Tollway site won't help — you'll need to go through the Skyway's portal instead. The Skyway's fees for missed tolls are notably steeper, including an administrative fee, video charge fee, and service fee that can add up quickly.

--- Pay your tolls. Set a calendar reminder for that 14-day window. And for the love of everything, get an I-PASS if you haven't already. Your future self, stuck behind a semi on I-294 at 5:47 PM — or rerouting around this year's Kennedy Expressway construction — will thank you.