California window tint laws allow dark film on your rear windows but are strict about the front: under Vehicle Code Section 26708, you cannot place any material on the windshield or the two front side windows that blocks the driver’s view, and the only film permitted on those front side windows is a nearly invisible, clear UV-blocking layer.1California Legislative Information. California Vehicle Code 26708 Rear side windows and the rear window can be tinted as dark as you want. A first violation is usually a fix-it ticket.
Front Side Windows
This is where most drivers get caught. Traditional dark tint on the two windows beside the front seats is illegal in California, no matter the percentage. The only aftermarket film the statute permits on those windows is clear, colorless, and transparent, designed to block ultraviolet rays, and it must meet two separate thresholds: the film itself has to transmit at least 88 percent of visible light, and the combined result of film plus glass must still meet the federal 70 percent minimum under Federal Motor Vehicle Safety Standard No. 205.1California Legislative Information. California Vehicle Code 26708
If you install qualifying film, keep an installer certificate in the vehicle. It has to be signed by the company that installed the film (or by the manufacturer if you installed it yourself), confirm the material meets the legal requirements, and identify the installer and manufacturer by full name and street address.2California Legislative Information. California Vehicle Code 26708 If the film later tears, bubbles, or wears to the point of obstructing your view, you have to remove or replace it.
Windshield
You can run a tint strip across the top of the windshield. The statute measures the permitted area from the driver’s seat rather than from the top of the glass: the bottom edge of the strip must sit at least 29 inches above the seat, which on most passenger cars works out to roughly the top four or five inches of windshield.2California Legislative Information. California Vehicle Code 26708 Many windshields have a factory “AS-1” line etched into the glass marking this boundary. If yours does, stay above it.
The strip itself cannot be red or amber, cannot contain opaque lettering, and cannot reflect sunlight or headlight glare into other drivers’ eyes beyond what the bare windshield would.1California Legislative Information. California Vehicle Code 26708 The rest of the windshield has to stay bare.
Rear Side Windows and Rear Window
Behind the driver, the rules loosen considerably. The windows behind the front seat are exempt from the general prohibition on applied materials, so you can tint rear side windows at any darkness level with no VLT minimum.1California Legislative Information. California Vehicle Code 26708
The back window follows the same rule with one condition: if you tint it, the vehicle must have outside rearview mirrors on both sides that give a view of the road at least 200 feet behind the car.1California Legislative Information. California Vehicle Code 26708 Most modern cars already have dual side mirrors, so this rarely matters. If one is missing or broken, driving with a tinted rear window becomes a citable offense until it is fixed.
Why “88 Percent Film” Is Not Automatically Legal
Factory automotive side glass is not perfectly clear. It typically transmits somewhere around 70 to 80 percent of visible light because of a slight tint built into the glass itself. When you add aftermarket film, the final VLT is the two values multiplied, not added. Factory glass at 75 percent combined with film rated at 88 percent produces about 66 percent (0.75 × 0.88 = 0.66), which fails California’s 70 percent requirement for front side windows.
So a shop advertising “legal 88% film” is only telling you half the story. The film’s rating alone does not guarantee your car will pass. This is also why officers measure the actual window during a stop rather than asking what product was installed.
Colors and Reflective Finishes
The statute names red and amber specifically for the windshield strip. For front side windows, the requirement that any film be clear, colorless, and transparent rules out every color as well as metallic or mirrored finishes. Section 26708.5 adds a general prohibition on applying any transparent material to any window if it alters the color of the glass, except where another provision specifically allows it.3California Legislative Information. California Vehicle Code 26708.5 Rear windows have no stated color restriction in Section 26708, but 26708.5’s color-altering ban still reaches them unless an exception applies.
Medical Exemption
If a medical condition requires extra sun protection, California allows a sun screening device on the front side windows that would otherwise be illegal. You need a signed letter from a licensed physician and surgeon certifying that you must be shaded from the sun because of a medical condition, or from a licensed optometrist for a visual condition.1California Legislative Information. California Vehicle Code 26708 Any licensed physician qualifies; the exemption is not limited to dermatologists.
The screening device itself still has to meet Section 26708.2:
- If transparent, it must be green, gray, or neutral smoke only.
- It must allow at least 35 percent of light through.
- It must be held in place by a frame, fasteners, or roller shade that allows easy removal.
- Neither surface can exceed 35 percent reflective quality.
Keep the letter in the vehicle at all times and present it if an officer asks. The exemption does not let you use darker, more reflective, or differently colored material than Section 26708.2 permits.
What a Tint Ticket Costs
A first citation under Section 26708 is typically a correctable offense, often called a fix-it ticket. You remove the illegal tint, show the court proof of correction, and pay a dismissal fee of around $25. Ignore it and get pulled over again with the same tint and the ticket is no longer correctable; with California’s court assessments and penalty surcharges layered on top of a modest base fine, the total can reach roughly $197 or more per citation. You can be cited every time you drive the car until the tint comes off.
Professional removal of aftermarket film generally runs $100 to $400 depending on how many windows are covered and the type of film. Replacing illegal film with compliant film costs more on top of removal.
How Officers Measure Tint
Officers use a handheld tint meter during stops. The device clamps onto both sides of the window, with a light source on one side and a sensor on the other, and reads the percentage of light that passes through. The reading reflects the actual combined VLT of your glass and whatever film is on it. Most California departments use digital meters, though some analog models remain in service. Departments calibrate these devices on a routine schedule and keep records of testing and adjustments, which can matter if you contest a citation.
If Your Car Is Registered Out of State
A car registered in a state with looser tint rules does not get a pass in California. As a general matter, vehicle equipment laws apply based on where you are driving, not where the vehicle is registered, and California has not adopted a blanket exemption for visiting vehicles. If you plan to spend meaningful time driving in the state, assume California’s limits apply to your windows.