California's legal tint limit for most windows

California allows 70% visible light transmission (VLT) on your front side windows — meaning 30% of the light can be blocked. Your windshield can have tint only on the top 4 inches, in a band that does not obstruct your view. Rear and back side windows have no VLT limit, so you can tint them as dark as you want.

The 70% rule applies to sedans, coupes, and most passenger vehicles. If you drive a truck or SUV with a factory-tinted rear window, that factory tint does not count against your legal limit on the back side windows — you can add more tint on top of it.

California does not require you to have tint at all. The law sets a floor for how dark tint can be on windows where it is restricted, not a requirement to tint. Many drivers choose not to tint their front windows because the legal limit is relatively light and offers little privacy.

Key Takeaways

  • Front side windows must allow at least 70% of outside light to pass through; rear and back side windows can be any darkness.
  • Your windshield can have tint only in the top 4-inch band and must not block your view of the road or instruments.
  • Factory tint on rear windows does not count toward your legal limit if you add aftermarket tint on top.
  • A CHP officer can measure your tint with a light meter during a traffic stop; if you fail, you will receive a fix-it ticket.
  • Medical exemptions for light-sensitive conditions exist but require a signed letter from your doctor and a special sticker on your vehicle.

How police measure tint and what happens if you fail

California Highway Patrol and local police use a light meter to measure how much light passes through your windows. The meter is held against the inside of the window, and the reading tells the officer whether your tint meets the 70% VLT standard. The measurement takes seconds and is the standard enforcement tool statewide.

If your front windows are darker than 70% VLT, you will receive a fix-it ticket (Vehicle Code 26708). This is not a fine you pay when ready — it is a notice to correct the violation. You have a set period (usually 30 days, but check your ticket) to remove or lighten the tint, then show proof to the court or a police station. Once you show proof, the ticket is dismissed and you pay nothing.

If you do not fix the tint within the important date and do not show proof, the ticket becomes a moving violation on your record and you owe a fine. The amount varies by county but typically ranges from $100 to $250. Repeat violations can result in higher fines and points on your driving record.

Medical exemptions and how to get one

If you have a medical condition that makes you sensitive to sunlight — such as lupus, porphyria, or severe photosensitivity — you may be able to tint your front windows darker than 70% VLT. California law allows this under Vehicle Code 26708(d), but you must follow a specific process to be protected.

First, obtain a letter from your doctor stating that you have a medical condition requiring darker tint. The letter does not need to be long, but it must be on the doctor's letterhead, signed, and dated. The doctor should specify that the condition is light-sensitive and that tint is medically necessary.

Take the letter to your local DMV office and request a medical exemption placard or sticker. The DMV will issue you a special decal to display on your vehicle. This decal tells law enforcement that your darker tint is medically authorized. Keep a copy of your doctor's letter in your vehicle at all times — if you are stopped, show both the letter and the placard to the officer.

Without the placard and letter, darker tint on front windows is illegal regardless of your medical reason. The exemption only works if you have completed the DMV process and have the documentation in your car.

Tint rules for different vehicle types

The 70% VLT rule applies to the front side windows of all passenger vehicles — sedans, SUVs, trucks, vans, and hatchbacks. However, some vehicles come from the factory with tinted rear windows, and this affects what you can legally add.

If your vehicle has factory-tinted rear windows, that tint is considered part of the vehicle's original design and does not count against your legal limit. You can add aftermarket tint on top of factory tint on rear windows without restriction. For example, if your SUV comes with 50% VLT factory tint on the rear window, you can add another layer of tint to make it darker.

Vehicles with no rear windows — such as some cargo vans or work trucks — have no tint restrictions on the areas where windows do not exist. The law applies only to windows that are present.

Windshield tint rules and the 4-inch band

Your windshield can have tint, but only in a 4-inch band across the top. This band must not extend below the manufacturer's AS-1 line, which is marked on most windshields and indicates the area where the sun visor typically sits. The tint in this band can be any darkness — there is no VLT limit for the windshield band.

The tint must not obstruct your view of the road, traffic signals, or your instrument cluster. If an officer believes your windshield tint blocks your vision, they can cite you. The key is that the tint stays in the top band and does not creep down into your line of sight while driving.

Reflective or metallic tint on the windshield is illegal, even in the 4-inch band. The tint can be any color — gray, bronze, or other shades — but it cannot have a mirror-like or shiny finish that reflects light back outward.

Rear window and back side window tint — no limits

California places no restrictions on how dark you can tint your rear window or back side windows. You can make them completely opaque (limo tint) if you choose. The only requirement is that you must have at least one side mirror on each side of the vehicle so you can see behind you — but this is a mirror requirement, not a tint requirement.

Because rear windows have no VLT limit, you will not receive a ticket for tinting them dark. Police focus enforcement on front side windows, where the 70% rule applies. If you want maximum privacy, tinting your rear and back side windows as dark as you want is the legal way to do it.

Frequently Asked Questions

Can I tint my front windows darker if I have a medical reason but no exemption placard yet?

No. The medical exemption only protects you if you have completed the DMV process and have the placard displayed on your vehicle. Until you have the placard and a signed doctor's letter in your car, darker tint on front windows is illegal. If you are stopped before you get the placard, you will receive a fix-it ticket. Get the exemption before you tint.

What if I bought a used car that already has dark tint on the front windows?

You are responsible for the tint on your vehicle, even if you did not explore it. If you are stopped and your front windows are darker than 70% VLT, you will receive a fix-it ticket. You must remove or lighten the tint to comply with the law. The previous owner's tint does not exempt you.

Does California tint law explore to motorcycles?

Motorcycles do not have side windows in the traditional sense, so the 70% VLT rule does not explore. However, if your motorcycle has a windscreen or windshield, you cannot tint it in a way that obstructs your vision. Keep any windscreen tint light and clear.

If I get a fix-it ticket, do I have to go to court?

No. You have the option to remove or lighten your tint and show proof to the court or a police station. Once you show proof of correction, the ticket is dismissed. You do not need to appear in court unless you choose to contest the ticket or fail to correct it by the important date.

Can I have different tint darkness on each front window?

Both front side windows must meet the 70% VLT standard. You cannot tint one window at 70% and the other at 50%. If either front window is darker than 70% VLT, you are in violation. The law treats both front windows as a single requirement.