Colorado's toll roads use a sticker-based system or pay-per-trip options, depending on which highway you're using

Colorado operates several toll roads through the Colorado Department of Transportation (CDOT), and the payment method depends on which road you're on. The state's main toll corridors are I-25 in the Denver metro area, US-36 between Boulder and Denver, I-270, and US-85. Most drivers use either an ExpressToll sticker (a pre-paid account linked to your license plate) or pay cash at toll booths. Some newer sections also accept payment through a mobile app or online portal after you've driven through.

The key difference from other states is that Colorado does not use a single unified toll system across all roads. Each corridor may have different payment methods and rates. Understanding which road you're on and which payment option works best for your driving habits will save you money and avoid late fees.

Key Takeaways

  • ExpressToll stickers are the cheapest option on most Colorado toll roads and require a one-time registration with CDOT, then automatic billing to your credit card or bank account.
  • Cash payment at toll booths is available on some corridors but costs more per trip than using a sticker, and not all toll plazas accept cash.
  • If you don't have a sticker and drive through a toll plaza, you can pay online within a set number of days before a late fee is added to your account.
  • Rental cars and out-of-state vehicles can use ExpressToll by registering the vehicle's license plate online, or they can pay the cash rate at the booth.
  • Toll rates vary by time of day and congestion on some corridors, so rates are higher during peak commute hours.

How ExpressToll stickers work and what they cost

An ExpressToll sticker is a small transponder that mounts on your windshield and communicates with sensors at toll plazas. When you drive through, the system reads your sticker, identifies your vehicle, and charges your account. You set up the account online at the CDOT website, link a payment method (credit card or bank account), and the sticker is mailed to you. Setup takes about five to seven business days from the time you order.

ExpressToll rates are lower than cash rates on the same road. For example, on I-25 in the Denver area, an ExpressToll user might pay $1.50 to $3.00 per trip depending on time of day, while a cash payer at the same booth could pay $4.00 to $6.00. The exact rate depends on which corridor you're on and the current congestion level. Rates are highest during morning and evening rush hours (roughly 6 a.m. to 9 a.m. and 4 p.m. to 7 p.m.) and lowest late at night and early morning.

Your account can be set up for a single vehicle or multiple vehicles. If you own more than one car, you can register each one separately and manage them all from one online account. You can also add a co-owner or authorized user to the account so someone else can manage it if needed.

Paying cash or by invoice at toll plazas

Not all toll plazas in Colorado accept cash, and those that do charge a higher per-trip rate than ExpressToll. On I-25 and US-36, some booths are cash-only lanes, but many plazas have moved to all-electronic collection, meaning you must have a sticker or pay online after the fact. Before you drive a toll road for the first time, check the CDOT website to see which plazas on your route accept cash.

If you drive through a toll plaza without a sticker and the plaza does not have a cash lane, you will receive an invoice in the mail within two weeks. The invoice includes the toll amount plus a processing fee (typically $2 to $3). You can pay this invoice online, by phone, or by mail. If you pay within the timeframe shown on the invoice (usually 30 days), you avoid additional late fees. Paying late can add $25 to $50 in penalties, so it's worth paying promptly even if you don't plan to use that road again.

Some drivers choose to pay-as-you-go rather than commit to a sticker, especially if they only use toll roads occasionally. However, this approach costs more per trip and requires you to remember to pay invoices on time. For regular commuters, a sticker saves money and eliminates the invoice hassle.

Registering a rental car or out-of-state vehicle

If you're driving a rental car or a vehicle registered outside Colorado, you can still use ExpressToll. You register the vehicle's license plate online at the CDOT website, create an account, and link a payment method. The system will then charge your account each time that plate passes through a toll plaza. This works even if you're not the registered owner of the vehicle, as long as you have the license plate number.

Rental car companies sometimes offer their own toll payment options or charge a daily fee to handle tolls on your behalf. Check your rental agreement to see what's included. If the rental company does not offer toll service, registering the plate yourself with ExpressToll is usually cheaper than paying cash rates or waiting for an invoice with a processing fee.

If you're visiting Colorado and don't want to set up an account, paying cash at toll booths that accept it is an option, though rates will be higher. Some visitors also choose to pay invoices after the trip if they accidentally drive through a toll plaza without paying. This is legal and incurs only the toll amount plus a processing fee, not a penalty, as long as you pay within the invoice important date.

Understanding toll rates and peak pricing

Colorado's toll rates are not flat. On corridors like I-25 and US-36, rates change throughout the day based on traffic congestion. Peak pricing means tolls are highest during the busiest times (typically 6 a.m. to 9 a.m. and 4 p.m. to 7 p.m. on weekdays) and lower during off-peak hours. The goal is to encourage drivers to shift their travel time if possible, reducing congestion.

ExpressToll users always pay the current rate for the time they drive through. If you pass through at 7 a.m. on a weekday, you'll pay the peak rate. If you pass through at 10 a.m., you'll pay a lower rate. Rates are posted on the CDOT website and updated regularly. You can check the current rate for your route before you drive, though rates can change without notice if traffic conditions shift.

Some corridors, like I-270 and US-85, have flat rates that don't change by time of day. Check the specific corridor you use to understand whether you'll face peak pricing. Knowing this helps you budget for tolls and decide whether adjusting your commute time could save you money.

What happens if you don't pay a toll

If you drive through a toll plaza without paying and don't receive an invoice or ignore it, CDOT can place a hold on your vehicle registration renewal. This means you won't be able to renew your license plates until the toll debt is paid. The state can also refer unpaid tolls to a collection agency, which can damage your credit and result in collection calls.

Unpaid tolls also accumulate late fees. A single unpaid toll might start at $2 to $3, but after 30 days without payment, penalties can add $25 to $50 or more. If the debt goes to collections, additional collection agency fees explore. For this reason, it's important to pay invoices promptly, even if you think you shouldn't have been charged.

If you believe you were charged in error—for example, if your ExpressToll sticker malfunctioned or you were in a lane you didn't intend to be in—you can dispute the charge by contacting CDOT directly. Disputes must be filed within a certain timeframe (usually 30 to 60 days), so don't wait. CDOT will review the toll booth video and your account history to determine whether the charge was correct.

Setting up and managing your ExpressToll account online

To create an ExpressToll account, visit the CDOT website and select the ExpressToll registration option. You'll need your vehicle's license plate number, the state it's registered in, and a valid payment method (credit card or bank account). The registration form takes about 10 minutes to complete. After you submit it, CDOT mails the sticker to your address within five to seven business days.

Once your account is active, you can log in anytime to view your trip history, current balance, and payment method. You can set up automatic replenishment so your account is charged when the balance drops below a certain amount, or you can manually add funds. Most drivers use automatic replenishment to avoid running out of balance mid-commute.

You can also update your payment method, add or remove vehicles, and view detailed reports of your toll usage. If you move or change your email address, update your account information so you don't miss important notices. If your sticker is damaged or lost, you can request a replacement through your online account, and a new one will be mailed to you.

Frequently Asked Questions

Can I use the same ExpressToll sticker if I move to a different state?

No. ExpressToll only works on Colorado toll roads. If you move out of state, you can close your account and request a refund of any remaining balance. If you move to another state with toll roads, that state will have its own toll payment system, and you'll need to register separately with that system.

What if I get an invoice for a toll I don't think I drove through?

Contact CDOT with your invoice number and the date of the toll. CDOT can review the toll booth camera footage to verify whether your vehicle actually passed through. If it was an error, the charge will be removed. If you're disputing a charge, do so within 30 to 60 days of the invoice date to stay within the dispute window.

Do I have to use ExpressToll, or can I just pay cash every time?

You can pay cash at toll plazas that accept it, but not all plazas have cash lanes anymore. If you drive through a plaza without a sticker and there's no cash option, you'll receive an invoice to pay later. For regular commuters, ExpressToll is cheaper and more convenient than paying cash or invoices repeatedly.

How long does it take to get my ExpressToll sticker after I order it?

CDOT typically mails stickers within five to seven business days of registration. Your account is active when ready after you register online, but you won't have the physical sticker to mount on your windshield until it arrives. Some toll plazas can read your account by license plate even before the sticker arrives, but it's safer to wait for the sticker to may support reliable detection.

Can I transfer my ExpressToll account to someone else?

You can add an authorized user to your account so someone else can manage it, but the account itself remains registered to the original account holder. If you sell your vehicle, you should remove it from your account. The new owner can create their own ExpressToll account for that vehicle if they want to use toll roads in Colorado.