How to Pay Colorado Tolls and Manage Your Account

How Colorado tollway payments work

Colorado's toll roads are managed by the Colorado Department of Transportation (CDOT), and you can pay tolls three ways: with a transponder (the fastest option), by license plate if you don't have one, or by mail after you receive an invoice. Most drivers use a transponder called an ExpressToll tag, which you mount on your windshield and link to a prepaid account. When you drive through a toll plaza, sensors read your tag and deduct the toll from your balance automatically.

If you don't have a transponder, CDOT photographs your license plate and mails you an invoice within 30 days. You then pay by the deadline on the invoice, usually 30 days from the mailing date. Tolls vary by road, time of day, and traffic conditions — some highways use congestion pricing, meaning the toll is higher during peak hours and lower during off-peak times. You can see current toll rates on CDOT's website before you drive.

Key Takeaways

• An ExpressToll transponder is the cheapest way to pay because it qualifies you for a 10 percent discount on most tolls.
• If you don't have a transponder, CDOT will mail you an invoice after photographing your license plate, and you must pay within 30 days.
• You can set up automatic payments or manual payments through your ExpressToll account online or by phone at 1-877-TOLL-CO2 (1-877-865-5262).
• Late payments can result in late fees, vehicle registration holds, and collection actions, so paying by the invoice deadline is important.
• Tolls on Colorado highways change based on traffic and time of day, so the cost of the same trip varies depending on when you drive.

Getting an ExpressToll transponder

You can order an ExpressToll tag online through the CDOT website, by phone at 1-877-TOLL-CO2, or in person at a customer service center. The tag itself is free, but you must open a prepaid account and load money into it before you can use it. Most accounts require a minimum balance — check the current requirement on the CDOT website when you order.

When you order, you'll provide your vehicle's license plate number, vehicle type, and payment method (credit card, debit card, or bank account). CDOT will mail the transponder to you, usually within 5 to 7 business days. Once you receive it, mount it on your windshield behind the rearview mirror, activate it online or by phone, and add funds to your account. You don't have to use the same vehicle every time — the transponder works on any vehicle as long as it's mounted properly.

Adding money to your ExpressToll account

You can add funds to your account online, by phone, or by mail. Online is the fastest: log into your account on the CDOT website, select "Add Funds," enter the amount, and choose your payment method. The money is usually available within one business day. By phone, call 1-877-TOLL-CO2 and speak to a representative, who can process your payment immediately using a credit or debit card.

You can also set up automatic replenishment, which adds a fixed amount to your account whenever your balance drops below a threshold you choose. This prevents your account from running empty and means you won't miss tolls because of low funds. If your account does run out of money while you're driving, CDOT will still let you through and will mail you an invoice for the toll plus a processing fee.

What happens if you don't pay a toll invoice

If you receive a toll invoice in the mail and don't pay by the deadline, CDOT adds a late fee to your bill — the amount varies but typically starts at $25. If you still don't pay after a second notice, the debt can be sent to a collection agency, and CDOT can place a hold on your vehicle registration. This means you won't be able to renew your registration until the toll debt is paid.

In some cases, unpaid tolls can affect your credit report if the debt goes to a collection agency. If you received an invoice by mistake, received it too late to pay, or have a dispute about the toll amount, contact CDOT customer service immediately. They can review the charge, extend your payment deadline, or remove the fee if there was an error on their part.

Paying tolls without a transponder

If you drive a toll road without an ExpressToll tag, CDOT's cameras photograph your license plate and match it to your vehicle registration. Within 30 days, you'll receive an invoice by mail at the address on file with the Colorado Division of Motor Vehicles. The invoice includes the toll amount, a processing fee (usually $2 to $3), and a payment deadline — typically 30 days from the mailing date.

You can pay the invoice online through the CDOT website, by phone, by mail, or in person at a customer service center. Paying without a transponder costs more because you pay the full toll plus the processing fee, and you don't receive the 10 percent transponder discount. If you drive tolls regularly, getting a transponder saves money over time even after accounting for the account setup.

Understanding toll rates and congestion pricing

Colorado's toll roads use dynamic pricing, meaning tolls change throughout the day based on traffic volume. During rush hour or heavy traffic, tolls are higher; during light traffic, they're lower. This system is designed to keep traffic flowing by encouraging drivers to travel during off-peak times if they can. The toll for the same stretch of road might be $2 during the morning commute and $0.50 in the middle of the afternoon.

You can check current toll rates on the CDOT website before you drive, and your ExpressToll account shows the toll charged after each trip. Some highways, like I-25 in the Denver metro area, use congestion pricing more aggressively than others. If you drive the same route regularly, paying attention to toll rates can help you plan your trip to save money — leaving 30 minutes earlier or later might cut your toll in half.

Managing your account and viewing your history

Log into your ExpressToll account online to view your balance, see your recent trips and tolls charged, update your payment method, and change your account settings. You can also download statements for your records or for tax purposes if you're a business driver. The account dashboard shows your current balance, the date of your last payment, and any alerts — such as a low balance warning or an upcoming automatic replenishment.

If you need to update your vehicle information, change your billing address, or close your account, you can do all of that online or by calling customer service. If you're selling your vehicle or switching to a different one, update your account so tolls are charged to the correct vehicle. If you move out of Colorado, you can keep your account open and use it if you return, or close it and request a refund of any remaining balance.

Frequently Asked Questions

Can I get a refund if I overpaid my toll account?

Yes. If your account has a balance remaining when you close it or if you believe you were overcharged, contact CDOT customer service. They will review your account and process a refund to your original payment method, usually within 5 to 10 business days.

What if I drove a toll road and didn't know it was tolled?

You'll still receive an invoice by mail. Contact CDOT customer service with the invoice number and explain your situation. While they cannot waive tolls, they may be able to remove the processing fee or work out a payment plan if you have a hardship.

Do I need a separate transponder for each vehicle?

No. One transponder can be used on multiple vehicles as long as you move it between them and mount it properly. However, if you drive two vehicles regularly on tolls, having separate transponders linked to the same account can be more convenient.

Can I dispute a toll charge on my invoice?

Yes. If you believe you were charged incorrectly, contact CDOT within 30 days of receiving the invoice. Provide the invoice number and explain why you think the charge is wrong. CDOT will investigate and adjust your account if an error is found.

What happens if my transponder is damaged or lost?

Contact CDOT customer service to report it. They can deactivate the old tag and mail you a replacement, usually at no charge. Until the new one arrives, you can drive tolls without a tag and pay by invoice, though you'll pay the processing fee each time.