Tint is one of the best upgrades you can make to a car in California. It rejects heat, blocks glare, protects your skin and interior from UV, and finishes the look of the vehicle. The catch is that our state has specific rules about how dark you can go and where. Get them wrong and you risk a correctable violation, sometimes called a fix-it ticket. The good news is that the rules are simple once you know them, and you can get an excellent result while staying fully legal. Here is how it works in 2026.

Tint darkness is measured in VLT

Window film darkness is described as VLT, or Visible Light Transmission. VLT is the percentage of light the window lets through. A higher number is lighter, and a lower number is darker. A film rated at 70% VLT lets most light through and looks nearly clear, while a 5% film, often called limo tint, blocks almost everything. California's rules are written in terms of how much light a window must allow, so VLT is the language that matters.

Front side windows: the 70% rule

This is the part that surprises most drivers. In California, your front side windows, the two next to the driver and front passenger, must allow more than 70% of light through. In practice that means only a very light film is legal up front. You cannot legally run a dark 20% or 5% film on your front doors.

That does not mean front tint is pointless. A high quality, nearly clear ceramic or infrared film at a legal shade can still reject a large amount of heat and block 99% of UV. You feel the difference on a hot day even though the glass still looks almost clear. This is exactly where film quality matters more than darkness.

Rear side windows and the back window: your call

Behind the driver, the rules relax. Your rear side windows and your back window can be any darkness you like in California. Many drivers go light up front to stay legal and then go darker in the back for privacy and a cleaner look. If your car has a factory privacy glass tint in the rear, we match the look so the whole vehicle reads as one finished piece.

The windshield: a strip along the top only

You may tint the windshield, but only along the top. California allows a non-reflective strip in the area above what is called the AS-1 line, which is roughly the top four inches of the glass. That strip helps with low sun and glare without blocking your main field of view. The large viewing area of the windshield has to stay clear so you can see the road clearly day and night.

Reflectivity and color rules

California also limits how mirrored or colored your film can be. Aftermarket tint must not be excessively reflective or mirror-like, and it cannot be red or amber. We only install neutral, low-reflectivity films, so your car looks factory-correct and stays on the right side of these rules. If you have seen a car with a heavy mirror or a colored tint and wondered if it was legal, this is the rule it likely runs into.

Medical exemptions

California allows a medical exemption for drivers with a qualifying condition, such as sensitivity to sunlight, with documentation from a licensed physician or surgeon. If you have that paperwork, you can run darker film than the standard front-window limit. Keep the documentation in the vehicle so you can show it if asked. We are happy to install to the level your exemption allows.

How we keep you legal and still cool

Our approach is simple. We install your front side windows at a legal shade and lean on premium ceramic or infrared ceramic film to do the heavy lifting on heat, because that is where film quality matters most. In the rear, we match the shade you want for privacy and looks. If you are not sure how a given darkness will look on your car, you do not have to guess. Our Tint Studio lets you preview shades on a vehicle and shows the California legal limits live as you slide between them. When you are ready, we confirm the exact plan for your car and put it in writing.

A quick recap

  • Front side windows must allow more than 70% of light through, so only a light film is legal.
  • Rear side windows and the back window can be any darkness.
  • The windshield allows only a non-reflective strip along the top, above the AS-1 line.
  • Film cannot be red, amber, or excessively reflective or mirrored.
  • A medical exemption exists with documentation from a licensed physician.