What Window Tint Is Legal in California? Limits for Each Window

Window tint in California is legal when front side windows let at least 70% of visible light through the glass and film together. Back windows can be any darkness, with outside mirrors on both sides if the rear window is tinted. Windshield tint is limited to a non-reflective top strip, not the full windshield.

For Fresno drivers, the number to ask about is the finished window’s light transmission, not the percentage printed on the film box. California Vehicle Code Section 26708 governs these limits. Check its current requirements before ordering film, especially if you need a medical exemption.

What is legal on each window in California

California applies the same window tint limits to sedans and other passenger vehicle types, including pickups. Buying an SUV does not give you a darker front-window allowance.

Window	Legal limit	The condition that matters
Front side windows (driver and passenger)	At least 70% of light through glass and film combined	Aftermarket film alone must have a visible light transmission of at least 88%
Windshield	Non-reflective strip only, across the top 4 inches or above the manufacturer's AS-1 line	Check the permitted strip boundary before installation
Back side windows	Any darkness	Color and reflectivity restrictions still apply
Rear window	Any darkness	Outside mirrors on both the left and right sides are required

A darkness percentage does not settle every legal requirement. Film color, reflectivity and the paperwork you keep in the vehicle also matter.

A 20% film is not legal on the front side windows

A 20% film lets through only 20% of visible light on its own, and the factory glass takes away more after that. That puts it well below the 70% combined requirement for front side windows. Aftermarket film for those windows must also have a film-only rating of at least 88%.

Think of the glass and film as two filters stacked together. Each one takes its share of the light, so the losses add up. Even a film with the required film-only rating can leave the finished window below the legal limit if the factory glass already blocks too much light.

The box number is not the number an officer's meter reads

Visible light transmission, or VLT, describes how much visible light passes through a material. A lower percentage means a darker window. An officer’s handheld meter reads the installed glass and film together, not the rating on the packaging.

Do not buy front-window film by the percentage a friend mentioned. Ask what your finished window will measure. Before installation, ask how the installer will check your factory glass and show you the combined reading.

Back side windows and rear glass can be any darkness

California places no darkness limit on back side windows or rear glass. If the rear window is tinted, though, the vehicle must have outside mirrors on both sides.

Check the mirrors before ordering rear film, particularly on an older vehicle with only one outside mirror. Rear-window permission does not extend to the front doors, and it does not remove the restrictions on color or reflective finishes.

The windshield cannot be tinted all the way down

The standard windshield allowance is a non-reflective strip across the top 4 inches, or above the manufacturer’s AS-1 line. It is not permission to cover the full windshield with a light-looking film.

Look for the AS-1 marking on your glass and have the installer explain the permitted boundary before work starts. Treat the windshield strip and front door glass as separate jobs with separate rules.

Darkness is not the only rule that matters

California prohibits red, amber and blue tint. It also prohibits tint that is more reflective than a standard untreated window. Those restrictions apply even where there is no darkness limit.

A mirror-like finish can therefore be a problem on rear glass even though dark rear film is allowed. Ask about reflectivity as well as VLT before choosing a film.

Why front-window darkness matters in Valley fog

Tule fog and wet roads reduce contrast in the Central San Joaquin Valley. Dark front side windows reduce the light reaching your eyes further, making pedestrians and the road edge harder to pick out at night.

Fresno’s summer heat and Highway 99 glare make tint a practical choice, but daytime comfort should not decide your nighttime visibility. If most of your driving happens after dark, choose lighter front film rather than treating the legal minimum as a target. Tell the installer when you drive, not just how dark you want the car to look.

What to confirm before the film goes on

Start with the factory glass. An installer needs to account for what is already on the vehicle before recommending front-window film. Ask these questions before agreeing to the installation:

1. How will you check the combined VLT, and will you show me the meter reading on my front windows?
2. Where will the windshield strip end under the applicable rule?
3. Does my vehicle have the outside mirrors required for tinted rear glass?
4. Does this film meet California’s color and reflectivity restrictions?
5. What manufacturer documentation should I keep in the vehicle?
6. How will this choice affect visibility during my nighttime driving?

California’s documentation requirements include the film manufacturer’s name and address. Ask for the applicable certificate or sticker and keep it in the vehicle. A product name or verbal assurance does not replace a measured reading or required paperwork.

At Cali Phat Customz in Fresno, owner Charlie Velasquez personally tints vehicles and brings over 30 years of window tinting experience. Our automotive tinting page explains the service, with personal attention to your vehicle and film choice.

What a tint ticket costs and what to do about it

Legal summaries list a $25 first-offense fine with an order to correct the tint, and roughly $197 to $200 for a subsequent infraction. These are not a current court fee schedule. Confirm the amount and correction requirements with the court named on your citation; a Vehicle Code 26708 violation does not add DMV points.

If you receive a ticket, follow the instructions on that ticket rather than assuming removal alone closes the case:

1. Check the correction and submission deadlines.
2. Have the noncompliant film removed or adjusted.
3. Keep proof of the correction and obtain any required verification.
4. Submit the paperwork to the court or office named on the citation.

Frequently asked questions

Is 20% tint legal in California for front windows?

No. Front side windows must transmit at least 70% of visible light through the glass and film together. A 20% film falls below that limit before the factory glass is even considered.

Is 5% limo tint legal in California?

A 5% film is allowed on back side windows and rear glass under California’s darkness rules, but tinted rear glass requires outside mirrors on both sides. It is not legal on front side windows. Windshield film has a separate top-strip restriction, and all film must meet the color and reflectivity rules.

Does factory glass count toward the tint percentage in California?

Yes. The front-window requirement applies to the glass and film combined. Factory glass already blocks some light, so ask for a reading of the finished window rather than relying on the film’s rating.

How much is a tint ticket in California?

Legal summaries list $25 for a first offense requiring correction and about $197 to $200 for a subsequent infraction. Confirm current charges and deadlines with the court handling your ticket. A Vehicle Code 26708 violation does not add DMV points.

Can I get a medical exemption for darker tint in California?

California allows a documented medical exemption, but you need paperwork from a licensed physician, surgeon, dermatologist or optometrist. Confirm the current requirements with official sources before ordering darker film. To discuss film for your vehicle, call Cali Phat Customz at (559) 270-5449 or use our contact form to request an estimate.