Colorado toll roads use three payment systems depending on which road you're on

Colorado has two main toll road networks, and they operate separately. E-470 runs northeast of Denver and uses its own payment system. Northwest Parkway runs northwest of Denver and also operates independently. A third smaller system, US 36 Bikeway/Toll Lane, connects Boulder to Denver. Each one accepts payment through their own account or through a pay-per-trip option, but you cannot use one account across all three roads.

If you drive a toll road without an account or payment method on file, the toll authority photographs your license plate and mails you an invoice. This invoice method costs more than setting up an account in advance — typically 25 to 35 percent higher per trip. You can pay that invoice by phone or online, but you will pay the penalty rate.

The fastest way to avoid overpaying is to open an account with the specific toll road before you drive it, load money into that account, and use a transponder or license plate registration. This takes about 10 minutes online and saves you money on every trip.

Key Takeaways

  • E-470 and Northwest Parkway are separate systems with separate accounts — you cannot use one account on both roads.
  • Driving without an account results in a license plate invoice mailed to your address, charged at a higher rate than account holders pay.
  • You can open an account online in minutes and choose between a transponder (small windshield device) or license plate registration for automatic payment.
  • Account holders can set up automatic payment from a credit card or bank account so tolls deduct without you stopping.
  • If you receive a toll invoice in the mail, you can pay it online, by phone, or by mail, but the amount will be higher than the account rate.

Opening an E-470 account

Go to e-470.com and click "Open an Account" in the top menu. You will need your vehicle's license plate number, your email address, and a payment method (credit card or bank account). The account opens when ready, but you have two choices for how tolls are charged: transponder or license plate.

A transponder is a small device you mount on your windshield. E-470 mails it to you free, and it arrives in 3 to 5 business days. Once it arrives, mount it and your tolls deduct automatically from your account balance. A license plate account skips the transponder — the toll cameras read your plate, match it to your account, and charge you. License plate accounts work when ready; you do not wait for a device.

Load money into your account by credit card or bank transfer. You can set up automatic replenishment so the account refills when the balance drops below a threshold you choose. Most people set it to refill at $25 or $50. Without automatic replenishment, you will receive a notice when your balance runs low, and tolls will be denied until you add funds.

Opening a Northwest Parkway account

Go to nwpkwy.org and select "Open Account" from the menu. You will need your vehicle's license plate number, email, and a payment method. Like E-470, you can choose a transponder or license plate account. Northwest Parkway also mails transponders free in 3 to 5 business days, and license plate accounts work right away.

Load your account the same way: credit card or bank account, with optional automatic replenishment. Northwest Parkway also allows you to add multiple vehicles to one account if you drive different cars on the toll road. Each vehicle gets its own transponder or license plate registration, and tolls from all vehicles draw from the same account balance.

Paying a toll invoice if you drove without an account

If you drove a toll road without an account and received an invoice in the mail, you have three payment options. You can pay online at the toll road's website (e-470.com or nwpkwy.org) by entering your invoice number and license plate. You can call the toll authority's customer service line — E-470 is 1-877-693-4470, Northwest Parkway is 1-877-669-7539. You can also mail a check to the address printed on the invoice.

The invoice amount is higher than what account holders pay for the same trip. For example, an E-470 trip that costs $2.50 for an account holder might cost $3.50 on an invoice. This penalty exists to encourage people to open accounts. If you plan to use the toll road again, opening an account after paying the invoice will save you money on future trips.

If you dispute the invoice — for example, you believe you were not on that road on that date — contact the toll authority's customer service line with your evidence. They can review the photo and the toll transaction. Disputes are uncommon but possible if a photo is unclear or if your vehicle was misidentified.

Understanding transponder versus license plate accounts

A transponder is more reliable in heavy traffic and bad weather because the toll booth reads the device directly rather than relying on a camera to photograph your plate. Transponders work in all lanes, including express lanes. The downside is you have to wait 3 to 5 days for it to arrive, and you have to mount it correctly on your windshield.

A license plate account works when ready — no waiting for mail. The toll cameras photograph your plate, match it to your account, and charge you. License plate accounts work in most lanes, but some express lanes require a transponder. The downside is that if your plate is obscured, dirty, or misread by the camera, the toll might not deduct and you could receive an invoice instead.

Many people use both: they open a license plate account for when ready use and request a transponder for backup or for express lanes. You can add a transponder to an existing license plate account at any time through your online account dashboard.

Managing your account and checking your balance

Log into your account on e-470.com or nwpkwy.org anytime to check your balance, view your toll history, update your payment method, or change your automatic replenishment settings. Both sites show you every toll you have paid, the date, the time, and the location. This is useful if you want to verify a charge or track your spending.

If your balance runs low and you do not have automatic replenishment set up, you will receive an email notification. You can add funds when ready through your account dashboard. If your balance reaches zero and you drive the toll road, the toll will be denied and you will receive an invoice in the mail at the higher rate.

If you move or change your email address, update it in your account settings so you receive notifications and invoices at the correct address. If you sell your vehicle, remove it from your account so tolls are not charged to you after you no longer own it.

What happens if you do not pay a toll invoice

If you receive an invoice and do not pay it within the timeframe printed on the notice, the toll authority may send a second notice with a late fee added. If you continue not to pay, the debt can be referred to a collection agency, which will attempt to collect the full amount plus collection costs. This can affect your credit score.

In some cases, unpaid toll debt can prevent you from renewing your vehicle registration with the Colorado Department of Motor Vehicles. The toll authority and the DMV share information, and registration holds are used as leverage to collect unpaid tolls. If your registration is held, you cannot legally drive the vehicle until the toll debt is resolved.

If you received an invoice by mistake or believe the charge is wrong, contact the toll authority's customer service line when ready rather than ignoring it. They can investigate and remove the charge if it was an error. Waiting makes the problem worse.

Frequently Asked Questions

Can I use the same account on E-470 and Northwest Parkway?

No. E-470 and Northwest Parkway are separate toll authorities with separate account systems. You must open an account with each one if you drive both roads. You cannot transfer money between them or use one transponder on both systems.

What if I have a rental car — how do I pay tolls?

Most rental car companies register their vehicles with the toll authorities and bill you for tolls on your rental agreement. Ask the rental company before you drive whether tolls are included or will be billed to you separately. If you want to avoid the rental company's toll fees, you can open a temporary account with your own payment method and use a license plate account, though this requires the rental company's permission to register the plate.

Do I get a refund if I load too much money into my account?

Yes. You can request a refund of your account balance at any time through your online account or by calling customer service. Refunds are processed to your original payment method within 5 to 10 business days. Some people keep a small balance ($10 to $20) in their account for occasional use rather than requesting a full refund.

What if my transponder stops working?

Contact the toll authority's customer service line and report the issue. They can send you a replacement transponder free of charge. In the meantime, your license plate account will still work if you have one set up, so tolls will deduct even without the transponder. If you do not have a license plate account, you will receive invoices until the new transponder arrives.

Can I use a transponder from another state on Colorado toll roads?

No. Colorado toll roads use their own transponder systems and do not accept transponders from other states. You must use a transponder issued by E-470 or Northwest Parkway, or use a license plate account instead.