Under California window tint laws, your front side windows can only carry clear, colorless UV-blocking film, your windshield can wear a non-reflective tint strip along the top, and your rear side and back windows can be tinted as dark as you want so long as the car has working side mirrors. The rules live in Vehicle Code Section 26708 and the sections that follow it, and most tint tickets come from drivers who assumed California worked like neighboring states.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors
Front Side Windows: Clear Film Only
California does not allow any darkened or colored tint on the windows next to the driver and front passenger. The only aftermarket material permitted there is clear, colorless, transparent film designed to block ultraviolet A rays.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors
Even that clear film has to clear two separate light thresholds. The film by itself needs a visible light transmittance of at least 88 percent. The glass and film together must still pass at least 70 percent of visible light, which matches Federal Motor Vehicle Safety Standard No. 205.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors In practice, that means nearly invisible ceramic or UV-rejection films. Any product with a visible shade on the front doors is non-compliant, no matter what percentage number is on the box.
If the clear film tears, bubbles, or wears down enough to obstruct your view, the law requires you to remove or replace it.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors
Windshield: A Strip Above 29 Inches
You can put a non-reflective tint strip along the top of the windshield, but the “four inches from the top” rule many shops quote is not what the statute says. The bottom edge of the strip has to sit at least 29 inches above the driver’s seat with the seat in its lowest and rearmost position.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors A sedan with a steeply raked windshield may only have a few inches of legal space; a tall truck has more.
The strip itself cannot be red or amber, cannot carry opaque lettering, and cannot reflect sunlight or headlights into other drivers’ eyes any more than bare glass would.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors High-mirror and metallic finishes draw enforcement attention quickly.
Rear Side and Back Windows: No Darkness Limit
Rear glass is where California gives drivers real room. Side windows behind the driver are exempt from the general ban on aftermarket window material, and the back window is also exempt as long as the vehicle has outside mirrors on both sides, each giving the driver a view of at least 200 feet behind the car.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors There is no minimum VLT percentage back there, so you can go as dark as you like. This is where most drivers put their tint budget.
Keep the Installer’s Certificate in the Car
If you have clear UV-blocking film on your front side windows, you need to carry a certificate for it at all times. A professional shop signs the certificate confirming the install meets the statute. If you installed the film yourself, the film’s manufacturer signs instead. The certificate has to list the installing company (or manufacturer) and the film manufacturer by full name and street address.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors
This paper is what tells an officer at the roadside that your film is the legal UV type rather than ordinary tint. Keep it in the glove box with your registration.
Medical Exemption for Sun Screening Devices
California does allow darker coverage on front side windows for drivers or front-seat passengers with qualifying medical or visual conditions, but these are not standard tint films. The law calls them sun screening devices, and they must be removable, held in place by a frame, temporary fasteners, or a flexible roller shade.2California Legislative Information. California Vehicle Code 26708.2
The device has to meet specific limits:
- Color is restricted to green, gray, or neutral smoke.
- If the material is transparent, it must transmit at least 35 percent of light.
- Reflectivity cannot exceed 35 percent on either the inner or outer surface.
- If the device uses opaque louvers instead of transparent material, at least 35 percent of its area must be open, and no single louver can have a projected vertical dimension greater than 3/16 inch.
These specifications come from Section 26708.2.2California Legislative Information. California Vehicle Code 26708.2
To use one, the driver or front-seat passenger has to carry a signed letter from a licensed physician and surgeon (medical condition) or a licensed optometrist (visual condition) certifying the need for shade from the sun.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors Without that letter in the car, there is no way for an officer to tell the device apart from an illegal modification.
One more limit: sun screening devices authorized under the medical exemption cannot be used during darkness.1California Legislative Information. California Vehicle Code 26708 – Windshields and Mirrors That is part of why the law insists these devices be removable rather than permanently applied. Drive at night with one still in place and you lose the exemption.
Tickets, Fines, and Fix-It Options
Window tint violations are usually treated as correctable equipment violations under Vehicle Code Section 40610. The officer typically writes a “fix-it ticket,” hands you a written notice, and gives you up to 30 days to remove or correct the illegal tint.3California Legislative Information. California Vehicle Code VEH 40610
Once the tint is off, you bring the vehicle to a law enforcement agency or court clerk, who verifies the fix and signs the citation. The dismissal fee is $25.4California Courts. What to Do if You Got a Fix-It Ticket
The correctable version is not guaranteed. If there is evidence of fraud, persistent neglect, or an immediate safety hazard, the officer can write a standard citation instead, which carries a much higher fine.3California Legislative Information. California Vehicle Code VEH 40610 Ignoring a fix-it ticket is worse than either: the court can add penalties, and an unresolved citation can turn into a failure-to-appear on your driving record. Removing the film and paying the $25 is far and away the cheapest ending.
Out-of-State and Commercial Vehicles
Tint that is legal in your home state does not protect you in California. Enforcement follows where you are driving, not where the vehicle is registered, so a visitor from a state that permits 35 percent VLT on front side windows can be cited the same as a resident.
Commercial vehicles have a parallel federal rule. Under 49 CFR 393.60, the windows immediately to the left and right of the driver must transmit at least 70 percent of light, matching the federal standard California’s own front-side rules already reference.5eCFR. 49 CFR 393.60 – Glazing in Specified Openings That 70-percent federal rule does not reach other windows on the vehicle, so cargo areas and rear glass follow California’s regular rear-window exemption as long as the dual mirrors are in place.