Colorado's license plate toll system charges you through your vehicle registration

Colorado does not use a separate toll tag or transponder system for most tolled highways. Instead, the state photographs your license plate as you drive through a toll zone and bills you based on your vehicle registration. The Colorado Department of Transportation (CDOT) matches the plate number to your registration address and sends an invoice to the registered owner. This means tolls are tied directly to your vehicle, not to a device you carry or mount.

The system applies to tolled express lanes on Interstate 25 and Interstate 270 in the Denver metro area, as well as some mountain highways. You do not need to do anything before driving through a toll zone — the system captures your plate automatically. However, understanding how the billing works and what happens if you do not pay is important for avoiding penalties and extra charges.

Key Takeaways

  • Colorado tolls are charged to the registered vehicle owner based on license plate photography, not a transponder or tag you purchase.
  • Toll invoices are mailed to the address on your vehicle registration, and payment is due within a set timeframe to avoid late fees.
  • If you do not receive an invoice or miss a payment, the debt can be reported to a collection agency and may affect your ability to renew your registration.
  • You can set up an account with the Colorado toll operator to monitor charges, receive email notifications, and pay online instead of waiting for mail.
  • Rental cars and vehicles registered out of state are billed the same way, with invoices sent to the address on file with the rental company or your home state registration.

How the billing process works after you drive through a toll zone

When your vehicle passes through a toll point, a camera captures your license plate. CDOT or its contractor matches that plate to your vehicle registration within the Colorado Division of Motor Vehicles database. An invoice is then generated and mailed to the address listed on your registration.

The invoice includes the date, time, and location of the toll transaction, the toll amount charged, and a due date for payment — typically 30 days from the invoice date. You can pay by mail using the payment slip included with the invoice, or you can pay online through the toll operator's website if you set up an account. Setting up an account is optional but recommended, because it allows you to see charges when ready instead of waiting for paper invoices to arrive.

If you move and do not update your vehicle registration address with the DMV, invoices will be sent to your old address and you may not receive them. This is one of the most common reasons people end up with unpaid toll debt. Updating your address with the Colorado DMV ensures invoices reach you on time.

What happens if you do not pay a toll invoice

Missing a toll payment triggers a series of escalating consequences. After the initial due date passes, a late notice is sent with an additional penalty fee added to the original toll amount. The penalty varies but is typically $25 to $50 per unpaid toll, depending on the toll operator.

If the debt remains unpaid after a second notice period, the account may be referred to a collection agency. At that point, the debt appears on your credit report and collection calls may begin. More importantly, unpaid toll debt can prevent you from renewing your vehicle registration with the Colorado DMV. When you attempt to renew your registration, the system flags the unpaid toll debt and your renewal is blocked until the debt is resolved.

Some toll operators also report unpaid tolls to the Colorado Department of Revenue, which can place a hold on your driver's license renewal or other state services. The longer the debt goes unpaid, the more expensive it becomes due to accumulating penalties and collection fees.

Setting up an online account to track and pay tolls

Creating an account with the toll operator gives you real-time visibility into charges instead of waiting for invoices in the mail. Most Colorado toll operators offer online portals where you can log in with your license plate number and view all transactions associated with your vehicle. You can also set up email notifications so you are alerted each time a toll is charged.

Online accounts allow you to pay tolls when ready after they are charged, which prevents late fees from accumulating. You can also set up automatic payments if you drive tolled routes regularly. To create an account, visit the toll operator's website (usually listed on your invoice) and enter your license plate number and vehicle registration information. You will need to verify your identity, typically by providing your driver's license number or the last four digits of your Social Security number.

If you have multiple vehicles, you can manage accounts for each one separately. This is especially useful if you own both a personal vehicle and a commercial vehicle, or if you have a household with multiple drivers.

Tolls for rental cars and out-of-state vehicles

Rental cars are billed the same way as privately owned vehicles — through license plate photography. The invoice is sent to the address on file with the rental car company, not to you as the renter. However, most rental car companies pass toll charges to the renter's credit card on file, often with an administrative fee added. You should review your rental agreement to understand the company's toll policy before you drive.

If you are visiting Colorado from another state and drive through a toll zone in your own vehicle, the invoice will be mailed to your home state address based on your out-of-state registration. The toll amount is the same, but you will not be able to set up a Colorado online account. You can still pay by mail using the invoice provided, or contact the toll operator directly if you have questions about a charge.

Some out-of-state visitors are surprised to receive invoices weeks after returning home. This delay is normal — it takes time for the plate to be matched to your registration and for the invoice to be generated and mailed. If you do not receive an invoice within 60 days of driving through a toll zone, contact the toll operator to verify the charge was processed correctly.

The difference between tolled express lanes and regular highways

Colorado's tolled express lanes on I-25 and I-270 operate differently from traditional toll roads. These lanes are optional — you can use the regular free lanes alongside them. The express lanes charge a variable toll based on traffic demand: prices are higher during peak commute times and lower during off-peak hours. The toll is still captured by license plate photography, and billing works the same way as other tolled routes.

Some mountain highways in Colorado also have tolls, such as certain sections of US-6 and I-70. These tolls are fixed amounts rather than variable, and they are also billed through license plate photography. The key difference is that you cannot avoid these tolls by taking an alternate route — they are the only way through that section of highway.

Disputing a toll charge or reporting a problem

If you believe a toll charge is incorrect — for example, if you were charged twice for the same trip or if you did not actually drive through the toll zone — you can dispute the charge. Contact the toll operator using the phone number or website listed on your invoice. Have your invoice number and the date of the disputed transaction ready.

The toll operator will review the photographic evidence and your account history. If the charge was made in error, it will be removed and you will receive a credit. If the charge is correct but you believe you should not have been charged (for example, if you were driving a vehicle exempt from tolls), you will need to provide documentation of that exemption.

Some vehicles, such as emergency vehicles and certain government vehicles, may be exempt from tolls. If you drive an exempt vehicle, you should register it with the toll operator before driving through a toll zone to prevent being charged. The process for registering an exempt vehicle varies by toll operator, so check the operator's website for specific instructions.

Frequently Asked Questions

Can I get a toll tag or transponder instead of being billed by license plate?

Colorado's system is license plate-based, not transponder-based. You cannot purchase a tag to avoid the system. However, setting up an online account allows you to monitor charges and pay online, which is faster than waiting for paper invoices.

What if I never received an invoice in the mail?

Check that your vehicle registration address is current with the Colorado DMV. If you moved recently, update your address when ready. You can also contact the toll operator directly with your license plate number to request a copy of the invoice or to set up an online account where you can see all charges.

Do I have to pay a toll if I only drove through part of a tolled zone?

You are charged based on entry and exit points. If you enter a tolled express lane and exit before the end of the zone, you are charged only for the distance you traveled. The toll amount is calculated automatically by the system.

Will an unpaid toll affect my credit score?

If the debt is referred to a collection agency and reported to the credit bureaus, yes, it will appear on your credit report and lower your score. However, the when ready consequence is usually a blocked vehicle registration renewal, which happens before credit reporting.

What if I was driving someone else's car when I went through a toll zone?

The invoice is sent to the registered owner of the vehicle, not the driver. The owner is responsible for paying the toll. If you were borrowing the car, you should let the owner know they will receive an invoice so they are not surprised by the charge.