Under Texas windshield tint law, you can only apply tinted film to a narrow strip across the top of the windshield, and that strip must let at least 25% of visible light pass through. The rest of the windshield has to stay clear, with one exception: a completely clear, untinted UV-blocking film is allowed over the whole surface. The rules sit in Texas Transportation Code Section 547.613 and Title 37 of the Texas Administrative Code, Section 21.3. Breaking them means a failed state inspection, a misdemeanor charge, and fines that can reach $1,000.
How Far Down the Windshield Tint Can Go
Tinted film is restricted to a strip at the very top of the glass. Two boundaries decide where that strip ends, and you get whichever allows less tint: the AS-1 line or a mark five inches down from the top of the windshield. If the AS-1 line sits four inches down, that is your limit. If it sits six inches down, the five-inch rule pulls the boundary higher.1State of Texas. Texas Transportation Code 547.613 – Restrictions on Windows
The AS-1 line is etched into the glass by the manufacturer. Look near the top corners of the windshield for small lettering that includes “AS-1” and an arrow. Not every windshield has one, which is why the law includes the five-inch fallback.2National Highway Traffic Safety Administration. 11-000697 Trooper Kile 205
Light Transmission and Reflectance Limits
Any tinted film in the permitted strip has to let at least 25% of visible light through. Inspectors measure this as Visible Light Transmission, or VLT, and the reading is taken with the film on the glass, not on the film alone. The glass itself absorbs some light before the film does, so the combined number is what matters.3Legal Information Institute. 37 Texas Admin Code 21.3 – Standards for Sunscreening and Privacy Window Devices
Reflectance has its own cap of 25% or less. That stops the film from behaving like a mirror and bouncing sunlight into oncoming drivers’ eyes. A film can meet the VLT rule and still fail on reflectance, so Texas tests both.4Department of Public Safety. Window Tinting Standards
Colors You Cannot Use
Red, blue, and amber films are prohibited anywhere on the windshield. Those colors are reserved for emergency lights and traffic signals. A film that meets the VLT and reflectance numbers will still fail if it carries one of these tints.3Legal Information Institute. 37 Texas Admin Code 21.3 – Standards for Sunscreening and Privacy Window Devices
The Clear UV Film Exception
If you want coverage across the whole windshield, there is one legal way to get it: a clear, untinted UV-blocking film. This film blocks ultraviolet rays without reducing visible light transmission or changing the color of the glass. No medical paperwork is required for this option.4Department of Public Safety. Window Tinting Standards For drivers who mainly want skin protection during long hours behind the wheel, this is the simplest route that stays within the law.
Medical Exemptions Do Not Cover the Windshield
This is the biggest misunderstanding about Texas tint law. The medical exemption allows darker-than-25% film on side windows and rear windows for people with conditions such as lupus or severe light sensitivity. It does not permit darker tint on the windshield. The regulation says qualifying vehicles may have reduced-VLT sunscreening “on all the windows except the windshield.”3Legal Information Institute. 37 Texas Admin Code 21.3 – Standards for Sunscreening and Privacy Window Devices
The exemption process itself changed. Texas DPS stopped issuing Window Tint Exemption Certificates on January 1, 2019, and no longer accepts applications. Instead, you get a signed statement from a licensed physician or optometrist that identifies you with reasonable specificity and states that darker sunscreening is medically necessary in the doctor’s professional opinion.4Department of Public Safety. Window Tinting Standards
Keep that signed statement in the vehicle. You present it during traffic stops and at the annual safety inspection, and the inspector notes it in the inspection database. There is no separate sticker or label. If you drive out of state, other states are not required to recognize a Texas exemption, so a citation elsewhere is possible.4Department of Public Safety. Window Tinting Standards
What a Failed Inspection Means
Texas requires an annual vehicle safety inspection, and window tint is part of it. If the windshield tint reads below 25% VLT, extends below the permitted strip, or uses a prohibited color, the vehicle fails. Front side windows below 25% also trigger a failure regardless of model year.4Department of Public Safety. Window Tinting Standards A failed inspection blocks your registration renewal, so you cannot legally drive until the non-compliant film is removed and the vehicle passes a re-inspection.
Inspectors use calibrated light meters. The meter either reads 25% or above, or it does not. Film that was once compliant can drift below the threshold as it ages, which catches some drivers off guard.
Fines and Misdemeanor Charge
Driving with non-compliant tint is a misdemeanor under Section 547.613.1State of Texas. Texas Transportation Code 547.613 – Restrictions on Windows Equipment violations under Chapter 547 carry fines starting at $200 and reaching $1,000 per violation. Any routine traffic stop can produce the citation, and the tint charge is separate from whatever else prompted the stop.
Civil Liability Beyond the Ticket
The fine is the obvious consequence, but illegal windshield tint can hurt you in a civil case too. If you are in an accident while running tint that cuts visibility below the legal limit, the other driver’s attorney can point to the violation as evidence of negligence. Under negligence per se, breaking a safety statute written to protect other road users can serve as automatic proof that you breached your duty of care. That shifts the dynamics of a personal injury lawsuit and makes settlement harder.
Insurers are unlikely to deny a claim just because you had illegal tint. If the carrier can argue the tint contributed to the crash, though, it becomes a factor in the liability determination. Aftermarket tint is also not typically covered for replacement under a standard auto policy unless you carry a specific endorsement for modifications.