In Arizona, front side windows must allow at least 33% of light to pass through, measured as visible light transmission (VLT), with a 3% tolerance built into the statute. Rear side windows and the back window have no darkness limit and can be tinted as dark as you want, including full limo shade. The windshield can only carry a transparent strip along the top. Those limits come from ARS 28-959.01, and they decide how dark tint can legally be in Arizona.
Front Side Windows: 33% VLT
VLT is the percentage of sunlight that passes through the glass and the film together. Lower number, darker window. Arizona sets the front side window floor at 33% VLT, and the statute allows a plus-or-minus 3% measurement tolerance, so a meter reading between 30% and 36% is legal.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield Most installers aim for 33% or a hair above so a hot-day reading doesn’t drop them under.
The same 33% minimum applies to front wing vent windows on older or specialty vehicles. The rule covers all passenger vehicles on Arizona roads: sedans, trucks, and SUVs alike.
Rear Side Windows and Back Window: No Limit
Everything behind the driver gets the freedom the front doesn’t. Rear side windows and the rear window have no minimum VLT, so you can run the darkest film on the market. There is one condition: if you tint the rear window, the vehicle must have exterior side mirrors on both the left and right that give a clear view of at least 200 feet to the rear.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield Nearly every modern vehicle meets that already.
Windshield: Top Strip Only
The windshield is the most tightly controlled piece of glass. Arizona prohibits any material that alters color or reduces light transmittance on the main portion of the windshield. The one permitted exception is a transparent strip along the top, allowed as long as its bottom edge sits at least 29 inches above the driver’s seat in its lowest and rearmost position.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield You may hear this called the “AS-1 line,” a factory marking on the glass. Arizona’s statute uses the 29-inch seat measurement rather than referencing the AS-1 line directly, but on most vehicles the two land in roughly the same place.
A separate federal safety standard requires windshield glazing in the driver’s forward field of vision to transmit at least 70% of light.2Federal Register. Federal Motor Vehicle Safety Standards – Glazing Materials That federal 70% floor applies regardless of state rules, which is why a fully tinted windshield cannot be done legally.
Reflectivity and Color
Darkness is not the only thing capped. Both front and rear side windows are limited to a luminous reflectance of 35%, with the same 3% measurement tolerance, so mirror-finish film is out. Red and amber film is prohibited on the windshield strip because those colors can be confused with emergency lights and traffic signals.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield Standard gray, charcoal, and neutral-tone films are fine.
Medical Exemption for Darker Front Tint
Arizona allows people with a documented medical need for sun protection to go below the 33% front-window limit. The statute covers anyone who needs to be “shielded from the direct rays of the sun” and requires a written attestation from a licensed physician, osteopath, or naturopathic doctor.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield Lupus, melanoma, and severe photosensitivity are common reasons.
You apply by submitting an “Application for Window Tint Medical Exemption” to ADOT’s Medical Review Program, with your doctor’s certification attached.3Arizona Department of Transportation. Window Tinting Exemption The exemption can cover a vehicle you own or one you ride in regularly as a passenger. Keeping the paperwork in the vehicle is wise, since an officer who stops you for dark tint will want to see proof at the roadside, even though the statute doesn’t explicitly require you to carry it.
Commercial Vehicles Are Different
If you drive a commercial motor vehicle, the Federal Motor Carrier Safety Administration requires windshields and side windows to maintain at least 70% light transmittance.4Federal Motor Carrier Safety Administration. May Windshields and Side Windows Be Tinted? That is far stricter than Arizona’s 33% passenger-vehicle rule, so a commercial driver cannot assume the state limit applies to their rig.
What Happens If Your Tint Is Too Dark
A window tint violation in Arizona is classified as a petty offense.1Arizona Legislature. Arizona Revised Statutes 28-959.01 – Materials on Windows or Windshield Officers carry tint meters and can check your VLT during any traffic stop. The usual outcome is an equipment repair order, sometimes called a “fix-it ticket”: you remove or replace the illegal film, show the court proof you corrected it, and the citation is typically dismissed after a small administrative fee.
Ignore the order and the fine for a petty offense in Arizona can reach $300.5Arizona Legislature. Arizona Revised Statutes 13-802 – Fines for Misdemeanors The bigger practical cost is that non-compliant tint gives officers a reason to pull you over at all. Film also degrades in Arizona’s sun, so a borderline-legal install can drift under the limit after a few years. A quick VLT re-check at a reputable shop is the cheapest way to confirm you are still in the legal range.