Colorado toll roads and how payment works

Colorado operates toll roads through CDOT (Colorado Department of Transportation), and you can pay tolls in three ways: with a transponder account, at a toll booth with cash or card, or through a one-time payment after you drive. The state's main toll corridors are I-25 in the Denver metro area, US 36 between Denver and Boulder, I-270, and US 85. Each road has different payment options, and choosing the right method depends on how often you drive tolled roads and whether you want to prepay or pay after.

Most Colorado drivers use ExpressToll, CDOT's prepaid account system. You load money into an account, attach a transponder to your vehicle, and the toll is deducted automatically as you pass through. If you don't have a transponder, you can still drive the toll roads — a camera reads your license plate and you receive an invoice by mail within two weeks. The invoice includes the toll amount plus a $2 administrative fee per trip.

Key Takeaways

  • ExpressToll is Colorado's main toll payment system; you can set up an account online at expresstoll.com and receive a transponder by mail within 5 to 7 business days.
  • If you drive without a transponder, CDOT photographs your license plate and mails you an invoice within two weeks, adding a $2 fee to each toll charge.
  • You can pay tolls at booth locations on I-25 and US 36 with cash or card if you prefer not to prepay or use a transponder.
  • ExpressToll accounts require a minimum balance and offer discounts — transponder users pay less per toll than drivers who receive invoices.
  • If you receive a toll invoice and disagree with the charge, you can dispute it through CDOT's online portal or by phone within 30 days.

Setting up an ExpressToll account

To open an ExpressToll account, visit expresstoll.com and click "Create Account." You will need a valid email address, a Colorado or out-of-state vehicle registration, and a payment method (debit or credit card). The account setup takes about 10 minutes. CDOT will mail you a transponder within 5 to 7 business days; you can request expedited shipping for an additional fee if you need it sooner.

Once your transponder arrives, mount it on your windshield according to the included instructions — placement matters because cameras must read the device. Add funds to your account through the website or by phone at 1-877-732-7797. The minimum opening balance varies, but most accounts start with $25 to $50. You can set up automatic replenishment so your account refills when the balance drops below a threshold you choose.

ExpressToll accounts are tied to your vehicle's license plate, so if you drive multiple vehicles on tolled roads, you will need a separate transponder for each one. You can manage all accounts from a single login if you register them under the same email address.

Paying tolls without a transponder

If you drive a tolled road without a transponder, a camera captures your license plate. CDOT mails you an invoice to the address on your vehicle registration within 10 to 14 days. The invoice shows the toll amount, the date and time you drove, and the road you used. You must pay within 30 days of the invoice date.

Payment options on the invoice include online payment through expresstoll.com, by phone at 1-877-732-7797, or by mail. Online and phone payments are processed when ready; mailed checks take longer. Each invoice includes a $2 administrative fee in addition to the toll itself, so this method costs more per trip than using a transponder.

If you drive tolled roads frequently without a transponder, the fees add up quickly. For example, a single trip on I-25 through Denver costs roughly $2 to $4 depending on time of day, plus the $2 invoice fee. Over a month, that can total $40 to $60 more than an ExpressToll account would cost.

Toll booth payment and cash options

Some toll locations on I-25 and US 36 still have staffed or automated toll booths where you can pay with cash or card at the time you drive. These booths are becoming less common as CDOT expands the transponder system, so check the expresstoll.com website to see which booths are still operating on your route.

Toll booth rates are typically higher than ExpressToll rates for the same trip. If you only drive tolled roads occasionally and prefer not to set up an account, paying at the booth is an option, but it is slower than using a transponder and costs more per trip. Some booths accept only exact change, so carry small bills and coins if you plan to use this method.

Understanding toll rates and discounts

Colorado toll rates vary by time of day and congestion. During peak hours (typically 6 a.m. to 10 a.m. and 3 p.m. to 7 p.m. on weekdays), tolls are higher. Off-peak tolls are lower. ExpressToll users see the rate before they drive and can check rates on the website or through the mobile app. The app shows real-time pricing for upcoming trips so you can decide whether to use the toll road or take an alternate route.

ExpressToll transponder users receive a discount compared to drivers who pay by invoice. The exact discount depends on the road and time of day, but transponder users typically pay 20 to 30 percent less per toll. This discount alone justifies setting up an account if you drive tolled roads more than a few times per month.

Some vehicles may be may be able to access for reduced toll rates. Motorcycles, for example, pay lower tolls on most Colorado roads. Check the expresstoll.com website or call 1-877-732-7797 to confirm rates for your vehicle type.

Disputing a toll charge or invoice

If you believe a toll charge is incorrect, you can dispute it through the ExpressToll website or by calling 1-877-732-7797. For invoice disputes, you have 30 days from the invoice date to file. CDOT will ask you to explain why you believe the charge is wrong — for example, if you did not drive that road on that date, or if you were charged twice for the same trip.

Common reasons for disputes include duplicate charges (when a transponder malfunctions and the system charges both the transponder and the license plate), incorrect vehicle information, or charges for a vehicle you no longer own. CDOT investigates disputes and typically responds within 15 to 30 days. If CDOT finds an error, the charge is removed and any overpayment is credited to your account or refunded.

If you sell or transfer a vehicle, update your registration information with ExpressToll when ready. If you do not, tolls may be charged to your old account or the new owner may receive invoices for tolls you drove.

Managing your account and checking balances

Log into your ExpressToll account at expresstoll.com to view your balance, transaction history, and upcoming charges. The website shows which tolled roads you have driven, the date and time, and the amount charged. You can also set up email or text alerts to notify you when your balance is low or when a charge is processed.

If you need to close an account, you can do so through the website or by calling 1-877-732-7797. Any remaining balance will be refunded to your original payment method within 7 to 10 business days. If you are moving out of Colorado or no longer drive tolled roads, closing your account prevents accidental charges.

The ExpressToll mobile app, available for iOS and Android, lets you manage your account on the go. You can check your balance, view recent charges, add funds, and see real-time toll rates for upcoming trips. The app also shows which toll roads are currently operational and any maintenance or closures that might affect your route.

Frequently Asked Questions

What happens if I drive a toll road and don't pay?

CDOT photographs your license plate and mails you an invoice within two weeks. If you do not pay within 30 days, the account may be referred to a collection agency, and late fees may be added. Unpaid tolls can also affect your vehicle registration renewal.

Can I use my ExpressToll account in other states?

ExpressToll is specific to Colorado. Other states have their own toll systems. However, some states participate in reciprocal programs where out-of-state transponders are recognized. Check the expresstoll.com website for information about which states accept Colorado transponders.

How long does it take to get a transponder after I sign up?

Standard delivery takes 5 to 7 business days. CDOT offers expedited shipping for an additional fee if you need the transponder sooner. You can start driving tolled roads when ready after you create your account, but you will receive invoices until your transponder arrives and is activated.

What if my transponder stops working?

If your transponder is not being read, contact ExpressToll at 1-877-732-7797 or through the website. CDOT will troubleshoot the issue and may send you a replacement at no charge. In the meantime, you will receive invoices for tolls driven, but you can dispute charges once the transponder is replaced and the issue is resolved.

Do I need a separate account for each driver in my household?

No. One ExpressToll account can cover multiple vehicles as long as they are registered to the same person or household. Each vehicle needs its own transponder, but you manage all of them through a single account login.