The window tint law in North Carolina requires that most vehicle windows let through at least 35% of outside light, measured as the combined effect of the glass and any film applied to it.1North Carolina General Statute 20-127 Standard passenger cars must meet that limit on every window. SUVs, vans, and pickups get stricter rules up front and no limit at all behind the driver. A film sold as “35%” often finishes below the legal threshold once factory glass is factored in, so pick a lighter film if you want to stay safely in bounds.
The 35% Rule and the Measurement Buffer
The statute sets the limit at 35% light transmission. There is a small built-in cushion: if an officer’s light meter reads above 32%, the window is conclusively presumed legal. That buffer exists to account for calibration differences between meters, not to give you a few extra points of darkness to play with. A reading at or below 32% fails the presumption and supports a citation on the spot.
Both the glass and the film count together. A window using film rated right at the 35% mark will usually come in darker than 35% once installed, because the glass itself blocks some light. Choose film accordingly.
Windshield Rules
The windshield has its own restriction. Tinting is allowed only along the top strip, and it cannot extend more than five inches below the top of the windshield or below the AS-1 line, whichever is longer. Most windshields have the AS-1 line etched into the glass from the factory. The remainder of the windshield has to stay clear.
One exception applies: you can cover the entire windshield with a clear, untinted film if the only purpose is blocking ultraviolet radiation. The film cannot reduce visibility or cut light transmission. For drivers worried about sun exposure without wanting a visibly tinted windshield, this is the legal path.
SUVs, Vans, and Pickup Trucks
North Carolina treats “multipurpose vehicles” differently from standard passenger cars. SUVs, minivans, and pickup trucks still have to meet the 35% limit on the windshield and the front side windows. But every window behind the driver is exempt from the light transmission requirement entirely. On those rear and back side windows, you can go as dark as you want.
Sedans and other standard passenger cars do not get that exemption. Every window on a car has to meet the 35% threshold, front to back. This is where most tickets come from. Drivers see limousine-dark glass on an SUV and assume their sedan can match it. It cannot.
Reflectivity and Color
Window reflectivity is capped at 20%, and all tint film has to be nonreflective. Mirror-finish films that throw glare at oncoming traffic are out, regardless of what the box says.
Color is also restricted. Red, yellow, and amber tint films are prohibited because they can interfere with how drivers perceive traffic signals and brake lights. Neutral, gray, and smoke tones are the standard legal choices, and most ceramic and carbon films are available in those shades.
What Changed on December 1, 2025
Senate Bill 43 removed window tint from the annual safety inspection effective December 1, 2025. Inspection stations no longer test tint with a light meter, and the separate $10 tint inspection fee no longer applies. The 35% limit itself is unchanged and still enforceable. Enforcement simply moved out of the inspection lane and onto the roadside.
The same law added a separate obligation during traffic stops. When a law enforcement officer approaches your vehicle, you have to roll down the window on the side the officer is standing on, whether that is the driver’s side or the passenger side. Refusing is now its own violation.
Penalties
Driving with illegal tint, or applying non-compliant tint to a vehicle subject to North Carolina inspection, is a Class 3 misdemeanor. For a person with no more than three prior convictions, the sentence is limited to a fine, capped at $200 unless another statute says otherwise. Court costs are added on top, so the actual out-of-pocket amount runs higher than the fine alone.
Officers use a Commissioner-approved light meter during stops. A reading at or below 32% supports a citation.
The 15-Day Removal Defense
North Carolina gives cited drivers a statutory way out. If you remove the illegal tint within 15 days of being charged and get a certificate from the DMV or the Highway Patrol confirming the window now complies, you can present that certificate to the prosecutor before trial or produce it in court. It is a defense, not an automatic dismissal, but it offers a clear path to resolve the citation without a misdemeanor conviction if you act inside the 15-day window.
Medical Exemption Permits
Drivers with a medical condition that causes unusual light sensitivity can apply for a permit allowing darker tint than the 35% standard. The statute is broad enough to cover conditions such as lupus, porphyria, severe photophobia, and other light or UV sensitivities, but approval depends on what a licensed physician documents.
To apply, have your physician complete the medical exception form and submit it to the NC Division of Motor Vehicles Medical Review Unit at 3112 Mail Service Center, Raleigh, NC 27699-3112. The physician has to explain the specific medical reason darker tint is necessary. Once approved, the permit lasts five years unless the Medical Evaluation Program sets a shorter period. Renewal requires updated medical documentation.
Keep the permit in the vehicle at all times. If you are stopped with tint darker than 35%, the permit is the only thing that distinguishes a medical exemption from an ordinary violation.
Commercial Vehicles
Commercial motor vehicles are subject to a stricter federal rule that overrides North Carolina’s more generous standard. Under 49 CFR 393.60, the windshield and front side windows of a commercial vehicle must allow at least 70% light transmission. In practice, that means commercial drivers cannot tint their front windows at all without violating federal regulations, even though the state limit is 35%.