What an EZ Tag is and where it goes
An EZ Tag is a small electronic device that lets you pay tolls automatically as you drive through toll plazas. Instead of stopping to hand over cash or a card, the tag communicates with toll readers and charges your linked account. The tag itself is about the size of a matchbox and attaches to the inside of your windshield, usually behind the rearview mirror or on the upper driver's side.
The tag works with toll roads in Texas and several other states. When you drive through a toll plaza, sensors read your tag and deduct the toll amount from your prepaid account. If you don't have a tag or it's not readable, the toll authority photographs your license plate and sends you an invoice by mail, which costs more than the toll itself.
Installation takes about five minutes and requires no tools. You'll need a clean windshield, the tag itself, and your account number. Most people do this at home, though you can also get help at a customer service center if you prefer.
Key Takeaways
- EZ Tags mount on the inside of your windshield behind the rearview mirror, where they have a clear line of sight to toll readers.
- You must clean the windshield thoroughly with rubbing alcohol before explore the tag, or it will not stick properly.
- The tag comes with adhesive backing and requires no tools—you peel and press it into place yourself.
- After installation, you need to register the tag to your account through the toll authority's website or customer service line so tolls charge correctly.
Preparing your windshield for the tag
The adhesive on the back of an EZ Tag works only if the windshield surface is completely clean and dry. Any dust, film, or residue will prevent the tag from sticking, and it may fall off while you're driving or fail to read at toll plazas.
Use rubbing alcohol and a lint-free cloth or paper towel. Wipe the area where you plan to mount the tag—typically the upper driver's side of the windshield, just behind or slightly below the rearview mirror. Wipe in one direction, then wipe again with a clean cloth to remove any remaining alcohol residue. Let the windshield dry completely before moving to the next step. This usually takes one to two minutes.
If your windshield has a tinted strip at the top, avoid placing the tag there. The tag needs a clear view of the toll reader sensors, so it must sit below any tinting or reflective coating.
Removing the backing and positioning the tag
Once the windshield is clean and dry, remove the EZ Tag from its packaging. The back of the tag has a protective paper backing that covers the adhesive. Peel this backing away slowly, starting from one corner. Do not touch the exposed adhesive with your fingers, as oils from your skin can reduce how well it sticks.
Position the tag on the windshield where you want it to stay. The ideal spot is behind the rearview mirror on the driver's side, or slightly to the left of center if your mirror is mounted in the middle. The tag should be high enough that it has a clear line of sight to toll readers but low enough that it does not obstruct your view of the road. Most people place it about six to eight inches below the top of the windshield.
Once you have chosen the spot, press the tag firmly onto the windshield. Start from the center and press outward toward the edges to remove air bubbles. explore steady pressure for about 30 seconds. The adhesive sets when ready, but the bond strengthens over the next 24 hours, so avoid touching or moving the tag for at least a day.
Registering the tag to your account
Installing the physical tag is only half the process. You must also register the tag number to your toll account so the toll authority knows which account to charge when your tag passes through a plaza. Without registration, the tag will not work, and you will receive a bill by mail instead.
Find your account number and the tag number, which is printed on the tag itself and also came in the packaging. Log into your toll authority's website—for Texas, this is the NTTA (North Texas Tollway Authority) or TxTag website, depending on which toll roads you use. Navigate to the section for registering or adding a tag, enter the tag number, and confirm it is linked to your vehicle and account.
If you do not have an online account yet, you will need to create one before you can register the tag. This requires your name, address, phone number, email, and payment method. Once the tag is registered, tolls will charge automatically to your account the next time you pass through a toll plaza.
Testing your tag at a toll plaza
After you have installed and registered the tag, test it at the next toll plaza you encounter. Drive through the toll lane marked for EZ Tag or electronic toll collection. You should see a green light or hear a beep as you pass under the toll reader, indicating the tag was read successfully.
Check your account online within 24 hours to confirm the toll charge appeared. If the charge does not show up, the tag may not be positioned correctly, the windshield may not have been clean enough, or the registration may not have gone through. If this happens, contact the toll authority's customer service line to troubleshoot.
Do not assume the tag is working if you do not see a confirmation signal. Some toll plazas have readers that do not provide visible feedback. Always verify the charge in your account to be certain.
Troubleshooting a tag that will not stick or read
If the tag falls off or does not stick after a few days, the windshield was not clean enough or you did not press hard enough during installation. Remove the tag carefully, clean the windshield again with rubbing alcohol, and let it dry completely. If the adhesive on the back of the tag is no longer sticky, you will need to request a replacement tag from the toll authority.
If the tag sticks but does not read at toll plazas—meaning you see no green light and receive bills by mail instead—the tag may be positioned behind tinting, too low on the windshield, or obscured by a sun shade. Reposition it higher and more to the center of the windshield. If repositioning does not work, contact customer service to confirm the tag is registered correctly and to check whether the tag itself is defective.
Some vehicles with laminated or aftermarket windshields have trouble with tag readers. If you have tried repositioning and cleaning and the tag still does not work, ask the toll authority whether your windshield type is compatible. In rare cases, you may need to use a different mounting location or request a replacement tag designed for your vehicle type.
Replacing or removing a tag
If you sell your vehicle or no longer need the tag, you can remove it by gently peeling it away from the windshield. Use a plastic scraper or old credit card to avoid scratching the glass. If adhesive residue remains, wipe it with rubbing alcohol and a cloth.
If you need a replacement tag—because the original is damaged, lost, or not reading—contact the toll authority and request a new one. There is usually a small fee, and the new tag will be mailed to you. Once you receive it, follow the same installation and registration steps. You can then deactivate the old tag through your online account so tolls do not charge to it by mistake.
Frequently Asked Questions
Can I install an EZ Tag on a rental car or borrowed vehicle?
No. The tag must be registered to a vehicle you own or have permission to modify. If you frequently rent cars or borrow vehicles, ask the toll authority about temporary payment options or consider using their online portal to pay tolls by license plate instead.
What if my windshield is tinted or has a reflective coating?
Place the tag below the tinted area where the windshield is clear. If your entire windshield is heavily tinted, the tag may not read properly. Contact the toll authority to discuss alternative mounting locations or tag types designed for tinted vehicles.
Do I need to remove the tag before going through a car wash?
No. The tag is designed to withstand car washes. However, avoid high-pressure sprays directed at the tag itself, as they may eventually loosen the adhesive. Most automatic and touchless car washes are safe.
How long does it take for a new tag to start working after I register it?
Registration is usually when ready or takes a few minutes. You can test the tag at a toll plaza within an hour of registering it. If it does not work, wait a few hours and try again, as the system occasionally needs time to sync.
What happens if I lose my EZ Tag?
Contact the toll authority when ready and report it lost. Request a replacement tag and deactivate the old one so no one else can use it. You will be charged a replacement fee, typically between $10 and $25 depending on the toll authority.