Top strip only
Film is allowed only across the top of the windshield, about the top 4 inches (down to the AS-1 line marked on the glass).
Tint law guide
California Window Tint Laws
What you can and can't tint on a car in California, in plain English, from the shop that installs it in Antioch every day.
The short version
At least 70% light
The glass and film together must let in at least 70% of visible light. Factory glass already blocks some light, so the film here has to be very light.
Any shade
No darkness limit on the windows behind the driver.
Any shade, with two mirrors
Any darkness is allowed as long as the vehicle has side mirrors on both the driver and passenger side.
Why the front windows are the tricky part
The 70% rule counts the film and the glass together. Most factory glass is already slightly tinted, so there's very little room left for film on the front doors. That's why we usually recommend a light ceramic film up front: it can block a good share of heat without darkening the glass much, so you stay legal and still notice the difference on a hot day.
Mirror-like, highly reflective films are not allowed on the front windows or windshield.
Medical exemptions
California has an exemption for drivers with certain medical conditions that make them sensitive to light. It requires a signed statement from a licensed physician, and the rules on what's allowed are specific. Check the current requirements with the California DMV or your doctor before you rely on one, and bring the paperwork when you come in.
What happens if tint is too dark?
Illegal tint is usually treated as a correctable violation, often called a fix-it ticket: you remove or replace the film and get it signed off. It's cheaper to get it right the first time.
How we handle it at Tintinc
- We install to California's limits on every car.
- We walk you through the shade and film options before we start.
- On the front windows, we steer you toward films that cut heat without going dark.
Not sure what's legal for your car? Ask us. Or read more about automotive tint and Tesla tint.
This page is a plain-English summary of California Vehicle Code section 26708 as we understand it, not legal advice. Laws change, so check the current code or the DMV if you need certainty.
Tint law questions
Is 35% tint legal on front windows in California?
Not as a rule. The front side windows must let in at least 70% of light with the film and glass combined, and 35% film is far darker than that.
Can I tint my whole windshield in California?
No. Only a strip across the top of the windshield is allowed.
Is limo tint legal on the back windows?
On the rear side windows and back glass, yes, any shade is allowed, as long as the car has side mirrors on both sides.
Do the rules apply to SUVs and trucks too?
Yes. The front side window and windshield limits apply the same way. Many SUVs and trucks come with darker factory glass on the rear windows already.
Get a legal tint quote
Tell us the vehicle and we'll recommend a shade that's legal and actually keeps the car cooler.
Prefer to talk? Call (925) 966-2928, 7 days a week, 9 AM to 6 PM.