California Window Tint Law: What’s Legal in 2026
Sacramento Window Tint Pros connects you with independent legal, CA-compliant window tinting installers across the Sacramento metro. Most of what people believe about California tint law is half right, and the half that is wrong is the half that gets tickets. This page states the rules in plain terms, explains the one number everyone misreads, and tells you which films comply.
CALL (916) 713-7307 Free Quote →Front Side Windows: 70% Is a Combined Number
California requires the front side windows, the driver’s and front passenger’s, to let roughly 70% of visible light through. The part people miss is that the 70% applies to the window as a whole: the factory glass and any film on it, measured together.
Factory glass is not clear. It already blocks some light, typically landing in the low-to-mid 70s on a meter before any film is added. Put a film rated “70%” on top of that and the combined result drops into the 50s, which is illegal. To stay at 70% combined, the film itself has to be very light, roughly 88% or higher.
This is why the question to ask an installer is not “do you have 70% film” but “what will my front windows meter at once the film is on.” A good shop has a light meter and will show you the reading. Modern ceramic films exist in these very light shades and still reject most of the heat, which is the whole point of putting anything on the fronts.
Rear side windows and the back window
Behind the driver, California does not set a darkness limit. Rear side windows and the rear window can be as dark as you like, including the 5% “limo” shade. One condition applies: if the rear window is tinted, the vehicle has to have outside mirrors on both sides so you can see behind you without the rear glass. Nearly every modern car has them. If yours does not, keep the back window clear.
The windshield
Film is allowed along the top edge of the windshield, the strip that sits above the line the manufacturer marks on the glass. Film across the rest of the windshield is restricted. Sources disagree on the exact measurement of the strip, so this page does not quote one; the installer will cut the strip to the marked line on your glass. If you are considering a clear heat-rejecting film across the full windshield, ask the installer specifically whether it is legal on your car before you buy it.
Reflectivity and color
Film cannot be more reflective than ordinary window glass, which rules out mirror-finish films on any window. Red, amber and blue tints are not allowed. Neutral charcoal, black and bronze shades are the norm and are fine.
The medical exemption
California has an exemption that allows darker front-window tint for certain medical conditions involving sensitivity to light. It requires documentation from a licensed medical professional, and the paperwork has to be in the car. If you think it applies to you, ask your doctor first, then tell the installer. This page does not go into the details because they depend on the condition and the documentation.
What a Tint Ticket Involves
Illegal tint is usually written as a correctable violation, the “fix-it ticket.” You remove or replace the offending film, have a law-enforcement officer sign off that it is corrected, pay a small administrative fee to the court, and the citation is dismissed. Leave it uncorrected and it becomes a regular fine. Fine amounts vary by county and change, so no figure is quoted here.
What draws the stop is almost always the front side windows. Dark rears on a car with light fronts rarely attract attention; dark fronts do. Used cars are the most common source of surprise tickets, because the previous owner’s tint comes with the car. Removing the front film and replacing it with a legal shade is a one-visit fix.
California Tint Rules at a Glance
| Window | Rule |
|---|---|
| Front side windows | About 70% light through, glass + film combined |
| Rear side windows | Any darkness |
| Rear window | Any darkness, with mirrors on both sides |
| Windshield | Top strip only, to the manufacturer’s line |
| Reflectivity | No more reflective than plain glass |
| Colors | No red, amber or blue |
| Medical exemption | Exists; needs documentation in the car |
Plain-language summary, not legal advice. Rules are stated generally on purpose; check the current vehicle code or ask the installer for specifics on your vehicle.
How to Tint Legally and Still Beat the Heat
- Fronts: a film rated about 88% or lighter-looking, in ceramic. Legal when metered with the glass, and ceramic in that shade still blocks most of the infrared heat. This is the standard setup across the Sacramento area now. Car tinting options →
- Rears: whatever you want. 35% is the common choice; 20% and 5% for privacy and kids in the back. Standard, carbon or ceramic.
- Windshield: the top strip. Cut to the line on your glass. Useful against low morning and evening sun on east–west commutes.
- Tesla and EV glass roofs: any darkness. The roof is not a side window, and tinting it is where EV owners get the most heat benefit. Tesla & EV tinting →
- Homes and offices: no vehicle rules apply. Residential and commercial film have no legal darkness limit; only an HOA or landlord may have a say.
- Old illegal tint: take it off properly. Rear defroster lines die under a razor blade. Tint removal →
California Tint Law FAQs
Is 35% tint legal in California?
On rear side windows and the back window, yes. On the front side windows, no: 35% film on factory glass meters far below the roughly 70% combined requirement.
Is 5% limo tint legal in California?
Behind the driver, yes, as long as the car has mirrors on both sides. Never on the fronts or windshield.
Does factory-tinted privacy glass on an SUV count?
Factory privacy glass on rear windows is legal as delivered. Adding film on top of it is also fine, since there is no rear darkness limit. The front doors on those vehicles are usually clear from the factory and follow the front-window rule.
Can an out-of-state car with darker tint drive in California?
Enforcement in practice varies, but the rules apply to vehicles on California roads. If you are moving here and registering the car, plan on bringing the front windows into compliance.
Will a shop install illegal front tint if I ask?
Reputable installers will not, and some will not install any film on the fronts without metering the result. If a shop offers to put 20% on your front doors without a medical exemption, that tells you something about the shop.
Get a Legal Tint Quote
CALL (916) 713-7307Quotes for legal tint across the Sacramento metro, including Elk Grove, Citrus Heights, Natomas and Rancho Cordova. Sacramento Window Tint Pros connects customers with independent, experienced local window tint installers — quotes are free with no obligation.