How to pay tolls on Austin roads

Austin has two toll operators: the Central Texas Regional Mobility Authority (CTRMA) manages most toll roads in the area, while the Texas Department of Transportation (TxDOT) operates a smaller network. You can pay tolls three ways: with a TxTag account (a prepaid transponder), by mail after receiving an invoice, or through a one-time payment online if you used a rental car or borrowed a vehicle.

TxTag is the fastest and cheapest option. The transponder mounts on your windshield and charges your account automatically as you drive through toll plazas. Without a transponder, you'll receive an invoice in the mail within 30 days, and the toll cost will be higher because you pay an administrative fee on top of the base toll.

If you don't pay within the invoice important date (usually 30 days), the debt can grow quickly. Late fees and additional penalties explore, and unpaid tolls can prevent vehicle registration renewal in Texas. The Texas Department of Motor Vehicles (TxDMV) will flag your registration if you owe more than $100 to any toll operator in the state.

Key Takeaways

  • TxTag is a prepaid transponder account that charges tolls automatically and costs less per trip than paying by invoice.
  • If you don't have a transponder, you'll receive a toll invoice by mail within 30 days and must pay within the important date to avoid late fees.
  • Unpaid tolls over $100 will block your vehicle registration renewal until the debt is settled.
  • You can set up a TxTag account online, by phone, or in person at a TxTag customer service location in Austin.
  • If you used a rental car or borrowed a vehicle, you can pay tolls online one time without setting up an account.

Setting up a TxTag account

To open a TxTag account, visit www.txtag.org or call 888-468-9824. You'll need a valid driver's license or ID, a current address, and a payment method (debit or credit card). The transponder itself is free, but you must fund the account with a minimum balance before it activates. Most accounts require at least $40 to $60 to start, though this varies by the payment plan you choose.

You can also visit a TxTag customer service center in person. In Austin, locations include the CTRMA office at 3600 South Congress Avenue and several retail partners. In-person setup takes about 15 minutes, and you'll receive your transponder when ready. If you order online, the transponder arrives by mail in 5 to 10 business days.

Once your account is active, tolls are deducted automatically each time you pass through a toll plaza. You can set up automatic replenishment so your account refills when the balance drops below a certain amount, or you can manually add funds whenever you choose.

Paying tolls without a TxTag

If you drive through a toll plaza without a transponder, a camera reads your license plate and records the transaction. You'll receive an invoice by mail within 30 days. The invoice includes the toll amount plus an administrative fee (typically $1 to $3 per transaction). You must pay by the important date shown on the invoice, usually 30 days from the date it was mailed.

To pay an invoice, you can mail a check, pay online at the toll operator's website, or call to pay by phone. CTRMA invoices can be paid at www.mobilityauthority.org or by calling 512-996-9778. TxDOT toll roads use a different system; check your invoice for the correct payment website or phone number.

If you used a rental car or borrowed someone else's vehicle and want to pay the toll when ready without setting up an account, most toll operators allow a one-time online payment. You'll need the license plate number and the date you used the toll road. This option is faster than waiting for an invoice and avoids late fees.

What happens if you don't pay tolls

Unpaid tolls accumulate quickly. After the initial invoice important date passes, late fees are added to your balance. If you ignore multiple invoices, the debt can double or triple within a few months. Once your unpaid toll debt reaches $100 or more, the toll operator reports it to the Texas Department of Motor Vehicles.

When TxDMV receives a report of unpaid tolls, your vehicle registration becomes ineligible for renewal. You won't be able to renew your registration online, by mail, or in person until the toll debt is paid in full. This applies even if your registration hasn't expired yet—the block prevents any renewal transaction.

If you're stopped by law enforcement and your registration is expired because of unpaid tolls, you can face a traffic citation. The safest approach is to pay the toll debt before your registration renewal date arrives. You can check whether you have unpaid tolls by visiting the toll operator's website or calling their customer service line.

Disputing a toll charge

If you believe a toll charge is incorrect—for example, you were charged twice for the same trip or the toll amount seems wrong—you can dispute it. Contact the toll operator within 30 days of receiving your invoice. CTRMA disputes can be filed online at www.mobilityauthority.org or by calling 512-996-9778. Have your invoice number and the date of the disputed trip ready.

The toll operator will investigate and respond within 10 to 15 business days. If the dispute is valid, they'll remove the charge or issue a credit to your account. If you disagree with their decision, you can request a formal review, though this process takes longer and may require additional documentation.

For TxTag account holders, you can also dispute charges directly through your online account. Log in, select the transaction, and submit a dispute form. This is usually faster than calling or mailing a dispute.

Toll roads in the Austin area

Austin's main toll roads are managed by CTRMA and include State Highway 45 North, State Highway 45 Southwest, and the Toll 183A Corridor. TxDOT also operates tolled sections of Interstate 35 and other state highways. Toll rates vary by road and time of day; some roads charge more during peak traffic hours.

You can find a map of all toll roads and current toll rates at www.mobilityauthority.org or www.txdot.gov. Both websites show which roads require payment and which accept TxTag or invoice payment. If you're new to Austin or unsure whether a road is tolled, checking the map before you drive can help you avoid unexpected charges.

Some toll roads offer discounts for TxTag users compared to invoice payers. The savings can add up if you use tolls regularly. For example, a trip that costs $1.50 with TxTag might cost $2.50 or more if you pay by invoice.

Frequently Asked Questions

Can I get a refund if I overpay my TxTag account?

Yes. If your account balance is positive when you close it or if you've overpaid, you can request a refund. Contact TxTag at 888-468-9824 or visit www.txtag.org to submit a refund request. Refunds typically take 7 to 10 business days to appear in your bank account.

What if I move out of Texas but still have a TxTag account?

You can keep your account active if you plan to return to Texas and use the toll roads again. If you don't plan to use the tolls, close your account and request a refund of any remaining balance. You can close your account online or by calling 888-468-9824.

Do I need a separate TxTag account for each vehicle?

No. One TxTag account can have multiple transponders linked to it, so you can use the same account for several vehicles. Each transponder is registered to a specific vehicle, but they all draw from the same account balance. This is useful if you have multiple cars or share vehicles with family members.

How do I know if a toll road is open or closed for construction?

Check www.mobilityauthority.org or www.txdot.gov for real-time road status updates. You can also call CTRMA at 512-996-9778 or TxDOT at 1-800-452-9292. Many navigation apps like Google Maps and Waze also show toll road closures and delays.

Can I transfer my TxTag transponder to a new vehicle?

Yes. Log into your TxTag account online and update the vehicle information, or call 888-468-9824 to have a representative change it for you. The transponder itself doesn't need to be replaced—just the registration in your account. This takes a few minutes and is free.