This is a plain-language summary for owners, not legal advice. The statute and DPS are the final word.
How tint is measured
Texas regulates two things. Light transmission (often called VLT, short for visible light transmission) is the share of visible light that gets through the glass and film together. Luminous reflectance is how mirror-like the window is. Both are measured on the finished window, film plus glass, not on the film alone. That detail causes most accidental violations, covered below.
Window by window
| Window | What Texas allows |
|---|---|
| Windshield | A tint strip at the top only, no lower than the AS-1 line (a small marking near the top edge of most windshields) or 5 inches from the top, whichever is closer to the top. The strip must pass at least 25% of light, be no more than 25% reflective, and may not be red, blue or amber. DPS says clear UV film with no darkening is allowed on the whole windshield. |
| Front side windows (driver and front passenger, including wing vents) | At least 25% light transmission and no more than 25% luminous reflectance, measured with the glass. |
| Rear side windows (behind the driver) | Exempt. Any darkness is allowed under the statute. |
| Rear window | Any darkness, if the car has an outside mirror on each side showing the road at least 200 feet behind. Without both mirrors, the 25% limits apply. |
The color ban on the windshield strip is easy to overlook if you are shopping for a decorative strip. Red, blue and amber are out.
The statute also lets DPS allow a 3% measuring variance on the front side windows. Do not plan around it; aim for a combined reading comfortably above 25%.
Factory-tinted glass
Factory-tinted glass that meets federal standards is exempt, so the darker rear privacy glass many cars and SUVs come with is fine as delivered. The catch is what happens when you add film on top of it, or on top of front glass that already blocks some light.
A film sold as 30% can end up below 25% once it is stacked on glass that already blocks some light.
Ask the installer to meter the front side windows after the film goes on and to write the reading on your invoice. That one number is the best protection you have at a traffic stop.
The installer's label
Texas requires the installer to place a compliance label between the film and the glass. DPS says one label goes on the rear bottom corner of the driver's side window, and the label wording reads "Complies with TTC 547.613 (b)". Under the statute, an installer who does not apply a compliant label commits a misdemeanor with a fine of up to $1,000. A reputable shop will do this without being asked; if your invoice and window show no label, ask why.
Medical exemption
Texas law makes it a defense to a tint ticket if the driver or a passenger needs to be shielded from the sun for a medical reason. DPS stopped issuing exemption certificates on January 1, 2019. Instead:
- Get a signed statement from a licensed physician or optometrist.
- It must identify the person with reasonable specificity and say the tint is needed to protect their health.
- Keep the statement in the car.
DPS's tint page, dated 2020, still mentions showing the statement at annual inspection. That part is out of date (see below), but the medical defense in the statute has not changed.
What changed with inspections
Texas ended annual safety inspections for non-commercial vehicles on January 1, 2025. The tint rules did not change. They are still enforced at traffic stops, and the label and any medical statement still matter. Emissions testing is a separate program for gasoline vehicles 2 to 24 years old. TCEQ lists 17 counties where it applies now: Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall and Tarrant around DFW; Brazoria, Fort Bend, Galveston, Harris and Montgomery around Houston; Travis and Williamson around Austin; and El Paso. Bexar County (San Antonio) is due to start on November 1, 2026. TCEQ lists electric vehicles as not required to be tested. Our Texas EV fees guide has the details.
Getting heat rejection legally
If you are tinting for heat rather than looks, the good news is that darkness and heat rejection are not the same thing. Ceramic films in lighter shades can cut a lot of heat while staying above 25% on the front windows. Practical steps:
- Decide what you want each window to do. Front sides: legal shade, high heat rejection. Rear sides and rear window: darker is allowed (with both outside mirrors for the rear window).
- Ask the shop for the film brand and product line in writing, and its rated light transmission.
- Ask how dark the combined reading will be on your car's front glass, not just the film rating.
- Have the front windows metered after install and the reading written on the invoice.
- Check that the compliance label is in place before you drive away.
- For a glass roof or windshield, ask about clear heat-rejecting or UV film, which DPS allows on the whole windshield.
Want to see the difference before you commit? Our tint preview tool shows roughly how different shades look. For more on heat, see Texas heat, and for how tint fits with PPF and coatings, see protecting a new car.
Find a tint shop in your city: DFW, Houston, Austin or San Antonio. Each listing covers tint, paint protection film (PPF, a clear film that guards paint against chips) and coatings.
Sources
- Texas Transportation Code, Chapter 547 (Sec. 547.613 and 547.609) (checked October 2026)
- Texas DPS, Window Tinting Standards (checked October 2026)
- Texas DPS, end of medical exemption certificates (checked October 2026)
- Texas DPS, safety inspection changes from January 2025 (checked October 2026)
- TCEQ, vehicle emissions testing overview (checked October 2026)
- TCEQ, emissions testing counties (including Bexar from November 1, 2026) (checked October 2026)
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