Understanding California's Window Tinting Laws and Regulations

Feb 21, 2025By TrueTints by Gary Brewer, Mobile Automotive Window Tinting Service

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Introduction to California's Window Tinting Laws

California is known for its sunny weather, making window tinting a popular choice for vehicle owners seeking relief from the heat. However, the state has specific laws and regulations governing the use of tinted windows to ensure safety and visibility on the roads. Understanding these laws is crucial before you decide to tint your vehicle's windows.

california sunny day

Understanding Visible Light Transmission (VLT)

One of the key aspects of California’s window tinting laws is the Visible Light Transmission (VLT) percentage. The VLT percentage indicates how much light a tint film allows to pass through your car windows. In California, the law requires that the front side windows must allow more than 70% of light in. This means that you can apply a tint, but it must be light enough to comply with this requirement.

The rear side windows and the rear window have more lenient rules, allowing for any darkness of tint. However, it's important to note that dual side mirrors are required if the rear window is tinted.

car window tint

Windshield Tint Regulations

When it comes to the windshield, California law is particularly strict. The state prohibits any aftermarket tinting on the windshield except for a strip at the top. This strip, commonly known as an "eyebrow," must not exceed four inches in height and should not obstruct the driver's view.

It’s essential to ensure that any windshield tint you apply adheres to these guidelines to avoid fines or being asked to remove the tint altogether by law enforcement.

Medical Exemptions for Window Tinting

California does allow for medical exemptions in certain cases. If you have a medical condition that requires additional protection from sunlight, you may be eligible for an exemption from some of these tinting rules. To qualify, you must possess a signed letter or document from a licensed physician or optometrist that specifies the medical necessity.

doctor note

Steps to Apply for a Medical Exemption

If you believe you qualify for a medical exemption, follow these steps:

  1. Obtain documentation from your healthcare provider detailing your condition and need for tinting.
  2. Submit this documentation to the California Department of Motor Vehicles (DMV) for approval.
  3. Once approved, keep a copy of the exemption in your vehicle at all times.

Consequences of Non-Compliance

Failing to comply with California’s window tinting laws can result in penalties. This often includes fines and could also involve having your vehicle pulled over by law enforcement. In some cases, you might be required to remove the illegal tint before driving your vehicle again.

traffic stop

To avoid these issues, make sure any tint applied to your vehicle meets state regulations. Consulting with a professional tint installer who is familiar with California laws can also help ensure compliance.

Conclusion: Staying Informed and Legal

Understanding and adhering to California’s window tinting laws is crucial for both safety and legal reasons. By ensuring your vehicle complies with these regulations, you not only avoid potential fines but also contribute to safer driving conditions for everyone on the road.

Before making any changes to your vehicle’s windows, always check the latest regulations and consider consulting with a professional to ensure that your tinting choices are both aesthetically pleasing and legally compliant.