Texas toll roads charge your account through three main systems: TxTag (the state's electronic toll collection), EZTag (Harris County's system), and Pay by Plate, which bills you by mail after photographing your license plate

When you drive a toll road in Texas, the toll authority doesn't stop you at a booth. Instead, a gantry overhead reads either an electronic tag mounted on your windshield or your license plate, and the charge hits your account within days. Which system charges you depends on which road you use and whether you have a tag. TxTag operates statewide on roads managed by the Texas Department of Transportation (TxDOT). EZTag covers Harris County toll roads around Houston. Pay by Plate is the fallback: if you have no tag, the system photographs your plate, and you receive an invoice by mail.

The money collected goes to three places: the toll authority that operates the road, the contractor who built or maintains it, and sometimes a private company that financed the project. Texas uses a mix of public and private toll roads, so where your payment ends up depends on who owns the road you drove.

Key Takeaways

  • TxTag is the statewide electronic toll system; you mount a tag on your windshield, and tolls are deducted from a prepaid account or charged to a credit card on file.
  • EZTag serves Harris County toll roads and works the same way as TxTag but is managed separately by the Harris County Toll Road Authority.
  • Pay by Plate photographs your license plate and mails you an invoice; it costs more per toll than using a tag and is meant as a backup for occasional drivers.
  • Toll revenue is split between the road operator, maintenance contractors, and in some cases private investors who financed the project.
  • You can set up account alerts to monitor spending and avoid overdraft fees if your prepaid balance runs low.

How TxTag charges your account

TxTag is the primary toll collection system for roads operated by TxDOT, including the Dallas North Tollway, the Sam Rayburn Tollway, and roads in the Austin and San Antonio areas. When you set up a TxTag account, you choose to prepay a balance or link a credit card. As you drive tolled roads, overhead readers detect your tag and deduct the toll amount from your account in real time. The charge appears in your online account within hours and on your credit card statement within one to three business days.

TxTag accounts require a minimum balance, which varies by region but is typically $10 to $40. If your balance drops below that threshold, the system either charges your linked credit card automatically or sends you a notice to replenish it. If you don't replenish and your balance hits zero, you'll still be allowed to drive, but the toll authority will send you an invoice by mail at a higher rate than the tag rate. Repeated non-payment can result in vehicle registration holds or collection action.

You can monitor your account through the TxTag website or mobile app, set up low-balance alerts, and view a detailed history of every toll you've paid. Some accounts offer discounts during off-peak hours or for frequent users, though these vary by road and region.

How EZTag charges your account in Harris County

EZTag is the toll collection system for Harris County roads, including the Sam Houston Tollway, the Hardy Toll Road, and the Fort Bend Tollway. It operates identically to TxTag: you mount a tag on your windshield, maintain a prepaid balance or link a credit card, and tolls are deducted as you drive. The Harris County Toll Road Authority manages EZTag separately from TxDOT, so you cannot use a TxTag on an EZTag road or vice versa.

EZTag accounts also require a minimum balance and charge higher rates if you drive without a tag and receive a Pay by Plate invoice instead. If you frequently drive both TxTag and EZTag roads, you will need accounts with both systems. Some drivers maintain two tags, one for each system, to avoid the hassle of switching.

How Pay by Plate works and why it costs more

Pay by Plate is the system used when you drive a toll road without a TxTag or EZTag. A camera photographs your license plate, and the toll authority mails you an invoice weeks later. The toll rate for Pay by Plate is significantly higher than the tag rate—often 50 to 100 percent more per toll—because the authority incurs costs to photograph, process, and mail the invoice.

Pay by Plate is intended for occasional out-of-state drivers or people who forgot their tag, not as a regular payment method. If you drive Texas toll roads more than a few times per year, setting up a TxTag or EZTag account will save you money. When you receive a Pay by Plate invoice, you can pay it online, by phone, or by mail. Payment is due within a specified window, usually 30 days.

If you receive a Pay by Plate invoice and believe you should not have been charged—for example, because you had a valid tag that malfunctioned—you can dispute it by contacting the toll authority with proof of your tag account. The authority will review the claim and may refund the overage or adjust your account.

Where toll revenue goes after you pay

Toll revenue in Texas is divided among several recipients depending on the road's ownership and financing structure. On TxDOT roads, revenue goes to the Texas Department of Transportation to maintain and operate the toll road system. On Harris County roads, revenue goes to the Harris County Toll Road Authority. Both agencies use toll revenue to pay for road maintenance, repairs, toll collection operations, and debt service on bonds issued to finance the roads.

Some Texas toll roads are privately financed and operated under long-term concession agreements with the state or county. On these roads, toll revenue is split between the private operator, the public authority, and sometimes a construction contractor. The private operator retains a portion to cover operating costs and return profit to investors. The public authority receives a share to fund other transportation projects or repay bonds.

Texas does not use toll revenue to fund general state transportation budgets or to subsidize non-toll roads. Toll roads are self-supporting: the tolls collected must cover the cost of operating and maintaining that specific road and repaying the debt used to build it.

Account management and dispute resolution

Both TxTag and EZTag allow you to view your account online, set up automatic replenishment, and receive low-balance alerts by email or text. You can also read transaction history for your records. If you believe a toll was charged in error—for example, if you were charged twice for the same passage or if your tag malfunctioned—you can file a dispute through your account portal or by contacting customer service.

Disputes are typically resolved within 10 to 20 business days. The toll authority will review the timestamp, location, and vehicle information to determine whether the charge was valid. If an error is found, the authority will refund the overcharge to your account or credit card. If you disagree with the resolution, you can request a formal review or contact the toll authority's customer service department.

If your account is inactive for an extended period, the toll authority may close it and refund any remaining balance to your original payment method. Some authorities charge an inactivity fee, though this is uncommon in Texas.

Toll rates and how they are set

Toll rates in Texas vary by road, time of day, and distance traveled. TxDOT and Harris County set rates based on the cost to operate and maintain each road, debt service on bonds, and inflation adjustments. Rates are reviewed periodically and may increase annually, typically by 2 to 5 percent. Rate changes are announced in advance and published on the toll authority's website.

Some toll roads offer congestion pricing, where the toll increases during peak hours and decreases during off-peak hours. This is designed to manage traffic flow and encourage drivers to shift travel times if possible. The Sam Houston Tollway uses dynamic pricing, for example, where tolls can range from $0.50 to $4.00 depending on traffic conditions.

Discounts are available for frequent users on some roads. TxTag users may receive a small discount compared to Pay by Plate rates. Some toll authorities offer reduced rates for low-income drivers, though may be able to access and the process process vary by region.

Frequently Asked Questions

What happens if my TxTag or EZTag balance runs out while I'm driving?

You can still drive through the toll plaza. The system will charge your linked credit card or send you a Pay by Plate invoice at the higher rate. To avoid this, set up a low-balance alert so you can replenish before your account empties.

Can I use my TxTag on EZTag roads or vice versa?

No. TxTag and EZTag are separate systems. A TxTag will not be read on EZTag roads, and you will receive a Pay by Plate invoice at the higher rate. If you drive both systems regularly, you need accounts with both.

How long does it take for a toll charge to appear on my credit card?

The toll is deducted from your account within hours, but the charge may not appear on your credit card statement for one to three business days, depending on your card issuer's processing time.

Can I get a refund if I was charged for a toll I didn't drive?

Yes. Contact the toll authority through your account portal or customer service and provide the date, time, and location of the disputed toll. The authority will review the transaction and refund any confirmed errors within 10 to 20 business days.

Do toll roads in Texas use the money to build new roads?

Toll revenue is used primarily to operate and maintain the toll road itself and to repay bonds issued to finance it. Some revenue may fund related transportation projects, but toll roads are designed to be self-supporting, not to subsidize other roads.