EZ Tag is a toll payment system used in Texas that lets you drive through toll plazas without stopping

EZ Tag is an electronic toll collection system run by the Harris County Toll Road Authority in the Houston area. When you have an active EZ Tag account, a small transponder mounted on your windshield communicates with toll readers as you pass through, and the toll is charged to your account automatically. You do not stop, do not hand over cash, and do not receive a receipt at the plaza — the charge appears on your monthly statement instead.

The system covers toll roads throughout the greater Houston region, including the Sam Houston Tollway, Hardy Toll Road, and Fort Bend Toll Road. If you drive these roads regularly, an EZ Tag account saves time and often costs less than paying cash at a toll booth, because cash tolls are typically higher than the electronic rate.

Key Takeaways

  • EZ Tag charges are deducted automatically from a prepaid account linked to your transponder, and you receive an itemized bill each month.
  • You can set up automatic replenishment so your account refills when the balance drops below a threshold you choose.
  • If a toll is charged in error or your transponder malfunctions, you can dispute the charge through your online account or by calling customer service.
  • Unpaid tolls accumulate fees and can eventually result in vehicle registration holds or collection action, so addressing missed payments early is important.
  • You can close your account and request a refund of any remaining balance, though the refund process takes several weeks.

Setting up an account and adding money

To open an EZ Tag account, you visit the Harris County Toll Road Authority website or call their customer service line. You will need your vehicle registration, a valid driver's license, and a payment method — either a credit card, debit card, or bank account for automatic payments. The authority will mail you a transponder, which typically arrives within 7 to 10 business days.

When you receive the transponder, you mount it on your windshield (usually behind the rearview mirror) and activate it through your online account. You then add funds by making a one-time payment or by setting up automatic replenishment. With automatic replenishment, you choose a minimum balance — for example, $25 — and whenever your account drops below that amount, a preset payment (such as $50) is charged to your card automatically. This means you are less likely to run out of money and incur violation fees.

How tolls are charged and billed

Each time you pass through a toll plaza with an active EZ Tag, the reader scans your transponder and deducts the toll amount from your account in real time. The toll amount varies depending on the road, the time of day, and traffic conditions — some toll roads use congestion pricing, which means rates are higher during peak hours. You receive a detailed monthly statement showing each toll, the date, the time, the location, and the amount charged.

If your account balance drops to zero while you are driving, the system will typically allow you to pass through and charge the toll as a negative balance. However, if you do not replenish your account, that negative balance will accrue late fees and can eventually trigger collection action or a registration hold on your vehicle.

What to do if a toll was charged by mistake

If you see a charge on your statement that you believe is incorrect — for example, you were charged twice for the same crossing, or you were charged on a road you did not drive — you can dispute it through your online account. Log in, find the transaction, and select the option to dispute or report an error. You will be asked to provide details about why you believe the charge is wrong.

The Harris County Toll Road Authority will investigate and typically respond within 7 to 14 business days. If the error is confirmed, the charge will be reversed and the funds returned to your account. If your transponder is malfunctioning and tolls are being charged to your account even when you are not driving, contact customer service immediately — they can deactivate the old transponder and send you a replacement.

Handling unpaid tolls and late fees

If your account balance goes negative and you do not pay within a certain period, the toll authority will send you a notice of violation. The notice includes the unpaid toll amount plus a violation fee, which is typically $25 to $50 depending on how long the account has been delinquent. If you ignore the notice, additional fees accumulate and the authority can place a hold on your vehicle registration, preventing you from renewing it.

If you receive a violation notice, pay it as soon as possible. You can pay online through your account, by phone, or by mail. Paying promptly stops additional fees from accruing and removes the registration hold. If you believe the violation was issued in error — for example, you did pay but the payment did not post — contact customer service with proof of payment and ask them to review the account.

Closing your account and getting a refund

If you no longer need your EZ Tag account, you can close it through your online account or by calling customer service. When you close the account, any remaining balance will be refunded to the original payment method. The refund process typically takes 4 to 6 weeks, so do not expect the money immediately.

Before closing your account, make sure you have no outstanding tolls or violation fees. If your account has a negative balance, you must pay it off first. Once the account is closed, you can remove the transponder from your windshield, though you do not need to return it to the authority.

Troubleshooting common EZ Tag problems

If tolls are not being deducted from your account when you pass through a toll plaza, your transponder may not be properly mounted or activated. Check that it is positioned behind the rearview mirror and that your online account shows the transponder as active. If the problem persists, request a replacement transponder through your account.

If you are being charged tolls but you do not have an active EZ Tag account, you may have been issued a violation notice instead. This happens when the toll reader cannot read your transponder or you do not have one at all. The toll authority will send you a bill for the toll plus a violation fee. If you believe this was an error, contact customer service with your vehicle information and the date and time of the crossing.

If you move out of the Houston area and no longer drive toll roads, close your account to stop any automatic charges. If you move within the region but change vehicles, update your vehicle information in your account so tolls are charged correctly.

Frequently Asked Questions

Can I use my EZ Tag outside of Houston?

EZ Tag is specific to the Harris County toll roads in the Houston area. If you travel to other states or regions with toll roads, those systems use different transponders. Some toll authorities have reciprocal agreements, but you will need to check with each system individually.

What happens if my transponder stops working?

If your transponder is not reading tolls correctly, you will either be charged a violation fee or the toll will not be deducted from your account. Contact customer service and request a replacement. They will deactivate the old one and mail you a new transponder at no charge.

Can I transfer my EZ Tag to a different vehicle?

Yes. Log into your account, remove the old vehicle, and add the new one. You can use the same transponder on the new vehicle as long as it is mounted in the same position (behind the rearview mirror). If you have multiple vehicles, you can add them all to one account and use separate transponders for each.

What if I dispute a toll charge and lose?

If the Harris County Toll Road Authority investigates your dispute and determines the charge was correct, the charge will remain on your account. You can request a second review by contacting customer service directly, but the outcome is unlikely to change unless you have new evidence that the charge was wrong.

Do I have to use automatic replenishment?

No. You can manually add funds to your account whenever you want. However, automatic replenishment is convenient because it prevents your balance from dropping to zero and triggering violation fees. If you prefer to pay manually, check your balance regularly and add funds before it runs out.