Texas DOT permits are issued by the Texas Department of Motor Vehicles for any vehicle or load that exceeds the state’s legal size or weight limits on public roads. The permit you need depends on how big the load is, how heavy it is, how often you’ll move it, and what you’re hauling. Pick the wrong one, or skip it entirely, and fines can reach $10,000 for the heaviest overweight violations.
When You Need a Permit
Texas sets maximums that any vehicle can meet without paperwork. Go past any of them and you need a permit before the wheels turn.
- Width: 8 feet 6 inches for commercial vehicles; 8 feet for passenger vehicles.
- Height: 14 feet, including the load.
- Length: 45 feet for a single motor vehicle, 59 feet for a semitrailer in a two-vehicle combination, 65 feet for most other two-vehicle combinations. Front overhang caps at 3 feet, rear overhang at 4 feet.
- Weight: 80,000 pounds gross, with individual axle and axle-group limits set by spacing.1Texas Department of Motor Vehicles. Texas Size/Weight Limits
Axle spacing matters on your application because the state calculates allowable weight for axle groups using the federal bridge formula. A few extra feet between axles can translate into thousands of additional pounds of legal weight.
The Permit Types and What They Cost
Texas Transportation Code Chapter 623 authorizes several permit categories. The right one depends on your load and how often you move it.
Single-Trip Oversize/Overweight Permits
A single-trip permit covers one movement of a non-divisible load — one that cannot reasonably be broken into smaller pieces. The base fee starts at $60. Loads over 80,000 pounds trigger weight-based charges that climb steeply; a load between 200,001 and 254,300 pounds runs $470 before service charges.2Texas Department of Motor Vehicles. Oversize/Overweight Permit Fees and Credit Card Payments
Loads over 20 feet wide or 125 feet long require the carrier to physically inspect the proposed route before issuance, unless TxDOT grants an exception based on its own route study.3Cornell Law Institute. 43 Texas Administrative Code 219.11 – General Oversize/Overweight Permits
Annual Overweight Permits
Carriers hauling heavy loads routinely can buy an annual permit under Section 623.011 instead of filing trip-by-trip. The permit allows a 10 percent tolerance above the maximum axle weight and 5 percent above the maximum gross weight. The base fee is $90, plus a county-coverage charge that runs from $175 for one to five counties up to $1,000 for all 254 counties statewide.4Department of Public Safety. Permits for Over-Size or Overweight Vehicles The vehicle must be registered for its maximum allowable gross weight, and the permit sticker must sit on the front windshield.
Superheavy Permits
Loads above the standard single-trip weight tiers, generally over 254,300 pounds gross, require a superheavy single-trip permit. These involve engineering analysis of the proposed route, including bridge load ratings and road surface conditions, and take longer to process than standard permits.1Texas Department of Motor Vehicles. Texas Size/Weight Limits
Specialty Commodity Permits
Some industries get permits built around their typical loads. Timber permits cover unrefined forest products in designated timber-producing counties. Annual length permits cover repeated moves of non-divisible overlength loads such as utility poles and pipes that go past the standard 4-foot rear overhang. These run for a year and spare carriers from filing individual trip applications.5Texas Department of Motor Vehicles. Oversize/Overweight Permits
Temporary Registration Permits
Separate from oversize/overweight permits, temporary registration permits cover commercial vehicles that aren’t registered in Texas, are registered in a state without reciprocity, or need to temporarily increase their registered weight. Four durations are available: 72-hour, 144-hour, one-trip, and 30-day.6Texas Department of Motor Vehicles. Temporary Vehicle Registration They apply to commercial laden trucks, truck-tractors, trailers, semitrailers, and motor buses on Texas highways.7Texas Department of Motor Vehicles. Temporary Permits
What You Need to Apply
Most rejected applications stall on paperwork problems. Pull everything together before you log in.
For each vehicle in the combination, including the power unit and any trailers, you’ll need the VIN, make, model year, and unit number. Measurements have to be exact: overall height, width, and length, plus the weight on each axle and the spacing between axles in feet and inches. Small errors matter. A few inches of extra width can force a different route, and an inaccurate axle weight can void the permit if your actual load doesn’t match the document.8Cornell Law Institute. 43 Texas Administrative Code 218.13 – Application for Motor Carrier Registration
On the company side, you need a valid USDOT number and either your Texas Comptroller’s Taxpayer Number or your Federal Employer Identification Number. Your insurer must file a Form E electronically through the TxDMV system to prove liability coverage. State minimums vary by operation: $500,000 for most carriers over 26,000 pounds gross, $1,000,000 for certain hazardous material haulers, and up to $5,000,000 for the highest-risk hazmat categories.9Texas Department of Motor Vehicles. TxDMV Number The Form E filing is $100 regardless of carrier type.
You also need to identify the specific highways, entry points, and final destination for the haul. For oversize loads, TxDMV or TxDOT may furnish a proposed route rather than approving the one you request, particularly for loads wider than 20 feet or taller than 19 feet. In those cases, the carrier is responsible for physically inspecting the route to confirm the load can safely navigate it.3Cornell Law Institute. 43 Texas Administrative Code 219.11 – General Oversize/Overweight Permits
How to Apply Through TxPROS
Most Texas oversize/overweight permits go through the Texas Permitting and Routing Optimization System, or TxPROS. The online portal takes your vehicle data, your permit type, and validates your route against a GIS mapping system that accounts for road conditions and restrictions.10Texas Department of Motor Vehicles. TxPROS Information and Tutorials Many permit types can be self-issued immediately after payment.
As of late 2025, TxPROS uses a shopping cart that lets you add multiple permits and pay in a single transaction. Phone payment is no longer accepted. When TxDMV staff processes your request, they drop it in your cart and send an email; you then log in and pay before midnight that day or the permit comes out of your cart.11Texas Department of Motor Vehicles. New TxPROS Payment Process
Standard self-issue permits print within minutes of payment. Superheavy permits and anything requiring manual engineering review take several business days because TxDOT has to evaluate bridge clearances and road conditions along the route.
Escorts, Flags, and Signs
Once a load hits certain dimensions, escort vehicles become mandatory. Texas sets the count and placement by size:
- Width over 14 feet to 16 feet: one escort in front on two-lane highways, or one in the rear on multi-lane highways.
- Width over 16 feet: one escort in front and one in the rear on all roads.
- Length over 110 feet to 125 feet: one escort in front on two-lane highways, or one in the rear on multi-lane highways.
- Length over 125 feet: one escort in front and one in the rear on all roads.
If the load exceeds escort thresholds in both width and length, front and rear escorts are required regardless of road type.12Texas Department of Motor Vehicles. Escort and Equipment Requirements
Red or fluorescent orange warning flags, 12 inches square, go on all extremities of the load. “Oversize Load” signs ride on the escort vehicles rather than on the hauling vehicle itself. Professional escort services typically run $60 to $70 per hour, with rates varying by region and load complexity.
City Curfews Along Your Route
Many Texas cities block oversize and overweight movement during rush hours. Austin, for instance, restricts loads wider than 12 feet or longer than 95 feet from 7–9 a.m. and 4–6 p.m. on weekdays. Some cities impose all-day weekend bans; Bandera prohibits all oversize and overweight movement on Saturdays and Sundays.13Texas Department of Motor Vehicles. Time Permit Curfews
Curfews are location-specific and sometimes apply only on certain highway segments. Check the full TxDMV curfew schedule for every city along your route. Getting caught moving during a curfew period voids your permit and triggers the same penalties as operating without one.
What It Costs to Skip the Permit
Operating oversize or overweight without the required permit is a misdemeanor. A first offense runs $500 to $1,000, and second or subsequent offenses can hit $5,000. Overweight fines scale with how far over the limit you are:
- Less than 2,500 pounds over axle or gross: $100 to $500
- 2,500 to 5,000 pounds over: $500 to $1,000
- 5,001 to 10,000 pounds over gross: $1,000 to $2,500
- 10,001 to 20,000 pounds over gross: $2,500 to $5,000
- 20,001 to 40,000 pounds over gross: $5,000 to $7,000
- More than 40,000 pounds over gross: $7,000 to $10,000
Axle or tandem-axle violations specifically top out at $2,500 for loads more than 5,000 pounds over.14Texas Comptroller of Public Accounts. Revenue Object 3018 – Special Vehicle Permits – Excess Weight
Fines are only part of it. An officer can order the vehicle to stop and stay parked until the carrier gets a valid permit or reduces the load to legal weight. The downtime is usually the bigger hit: a stranded load with a hired escort on the clock, an idle crane at the delivery site, and a customer waiting on equipment that isn’t arriving. The permit is almost always cheaper than what happens when you don’t have one.