In Texas, front side windows must let through at least 25% of visible light, measured as the combined transmission of the glass and any film. The windshield can only carry tint above the AS-1 line (or the top five inches if there’s no AS-1 mark), and that strip also has to meet the 25% minimum. Rear side windows and the back windshield have no darkness limit at all, provided the vehicle has a working side mirror on both the left and right. That is how much tint is legal in Texas for a standard passenger vehicle, and it comes from Texas Transportation Code Section 547.613 and the Department of Public Safety rules under Title 37 of the Texas Administrative Code, Rule 21.3.
The Limits for Each Window
Visible Light Transmission, or VLT, is the number that matters. It’s the percentage of light that makes it through the glass and the film together, not the film alone. The limits break down by position on the vehicle.
- Front side windows (the two windows beside the driver and front passenger, including wing vents): at least 25% VLT.
- Windshield: tint film only above the AS-1 line, or within the top five inches if the glass has no AS-1 mark, whichever sits closer to the top. That strip must also meet the 25% VLT minimum. A clear UV-blocking film can go on the rest of the windshield without an exemption.
- Rear side windows: no VLT limit. Any darkness is allowed, in any body style.
- Rear windshield: no VLT limit if the vehicle has an outside mirror on each side giving the driver a view of at least 200 feet behind. Without dual side mirrors, the rear glass has to meet the 25% standard.
The absence of any rule on rear side windows surprises most drivers. The statute specifically exempts “a side window that is to the rear of the vehicle operator” from tint restrictions entirely.
Reflectivity and Color
Front side windows are capped at 25% luminous reflectance, and the same cap applies to the rear windshield when the vehicle doesn’t have dual side mirrors. Mirror-finish films that bounce back more than that are illegal no matter how much light they pass.
Color rules are narrower but strict. Windshield tint cannot be red, blue, or amber. The statute also prohibits placing any material on a window that “alters the color” of the glass, and the front-side-window exemption only covers VLT and reflectance, not color. Standard charcoal and neutral-gray films are fine. The colors to stay away from are the ones associated with emergency vehicle lights.
Medical Exemption for Darker Tint
If a medical condition requires extra protection from sunlight, Texas allows darker film on the front side windows and on the permitted upper strip of the windshield. The exemption does not open up the main area of the windshield below the AS-1 line.
To qualify, you need a signed statement from a licensed physician or licensed optometrist identifying you as the driver or occupant and stating that the darker tint is medically necessary to safeguard your health. Keep that statement in the vehicle so you can hand it to an officer during a stop, and bring it along to an emissions inspection if your county requires one.
DPS does not publish a list of qualifying conditions. Severe photosensitivity is the most common basis in practice. The statement should come from a provider who can speak to why ordinary tint is not enough for your condition.
What Illegal Tint Costs
Driving with non-compliant tint is a misdemeanor under Section 547.613. The statute doesn’t set a fixed fine for drivers; the charge falls under the general equipment-violation framework of Section 547.004. First-offense fines tend to be modest, and a court can dismiss the charge entirely if you remove or fix the tint before your first court appearance and pay a reimbursement fee of no more than $10. That dismissal option is not available for commercial vehicles.
Costs climb for repeat stops. Each new violation is a new misdemeanor, and courts are less willing to dismiss when the problem keeps appearing. During a stop, an officer typically pulls out a handheld tint meter, cleans the glass, and reads the VLT in seconds. These meters carry a margin of error of about two percentage points in either direction, which is why most installers aim a few points above 25% rather than exactly at the line.
Installers face their own penalty. Applying aftermarket tint without placing the required compliance label is a separate misdemeanor with a fine of up to $1,000.
The Compliance Label
Section 547.609 requires a label on every vehicle with aftermarket tint. The installer places it at the rearmost bottom corner of the driver’s side window, between the film and the glass. It has to read “Complies with TRC Chapter 547” or reference Section 547.613(b). The installer’s name and other details are optional, and only one label is required per vehicle no matter how many windows are tinted.
For the driver, the label is the easiest way to show compliance during a traffic stop without the officer having to pull out a meter. If you had tint installed and there’s no label, ask the shop to add one.
No More Safety Inspections, but the Rules Still Apply
Texas ended annual safety inspections for non-commercial vehicles on January 1, 2025. House Bill 3297, signed by Governor Abbott in 2023, replaced the inspection with a $7.50 inspection replacement fee at registration ($16.75 at first registration for new vehicles, covering two years).
Before the change, illegal tint meant an automatic inspection failure. That checkpoint is gone for passenger cars, but the tint limits haven’t changed. Officers can still stop you and cite you for illegal tint during any traffic stop. Vehicles in emissions-testing counties still go through emissions inspections (Bexar County joins the list in 2026), and tint can be checked there. Commercial vehicles still get full safety inspections, and tint remains part of that process.