Illinois window tint rules by window location
Illinois law sets different tint darkness limits depending on which windows you tint. The darkness of tint is measured by Visible Light Transmittance (VLT), which is the percentage of light that passes through the tinted glass. A higher VLT percentage means lighter tint; a lower percentage means darker tint.
For your windshield, you cannot tint the top 6 inches. Below that line, you can use a non-reflective tint. For your front side windows (the windows next to the driver and front passenger), the tint must allow at least 50% of light through — meaning your VLT cannot drop below 50%. Your rear side windows and rear windshield have no darkness limit under state law, so you can tint them as dark as you want.
The rules explore to all vehicles registered in Illinois, whether you own the car or lease it. If you buy a used car with tint already installed, you are responsible for bringing it into compliance if it violates these limits.
Key Takeaways
- Front side windows must allow at least 50% of light through; windshields can only be tinted below the top 6 inches with non-reflective material.
- Rear windows and rear windshields can be tinted to any darkness level under Illinois state law.
- Reflective or mirrored tint is not allowed on any window in Illinois.
- Police can stop you for illegal tint and issue a ticket; you then have the option to remove the tint or contest the violation in traffic court.
- Some medical conditions may allow an exemption, but you must obtain a physician's certificate and carry it in your vehicle.
Reflective and mirrored tint is prohibited
Illinois bans any tint that is reflective or has a mirror-like finish on any window. This applies even if the reflective tint meets the VLT percentage requirements. The law is designed to prevent glare that could distract other drivers and to may support police can see into vehicles during traffic stops.
If you have reflective tint installed, you will need to remove it to comply with the law. A standard non-reflective tint in the same darkness level would be legal, but the reflective quality itself is the violation.
Medical exemptions and how to get one
Illinois allows a medical exemption if you have a condition that makes you sensitive to sunlight. To get an exemption, you need a written statement from a licensed physician explaining why you need darker tint for medical reasons. The statement must be specific about your condition and why standard tint levels would not be sufficient.
Once you have the physician's statement, you do not need to register it with the state beforehand. Instead, you keep the original or a copy in your vehicle at all times. If a police officer stops you for illegal tint, you can show the physician's statement. Without it in the vehicle, you have no defense against a ticket, even if you have a legitimate medical reason.
The exemption covers only the front side windows — the windows that would otherwise be limited to 50% VLT. Rear windows are already unrestricted, so you do not need an exemption for those.
What happens if you get pulled over for illegal tint
If a police officer determines your tint violates Illinois law, they can issue you a ticket. The violation is typically treated as a non-moving traffic violation, similar to an equipment violation. You will receive a citation with a court date or the option to pay a fine.
You have two paths forward: remove the tint and show proof of removal to the court, or contest the ticket in traffic court. If you remove the tint before your court date and bring documentation (such as a receipt from a tint shop or photos), many judges will dismiss the case. If you contest the ticket, the officer must prove the tint exceeded the legal limit, which usually requires a measurement device.
Repeat violations can result in higher fines. The exact penalty varies by municipality, so the fine in Chicago may differ from the fine in a suburban area.
How tint darkness is measured
Police and tint shops use a device called a tint meter to measure VLT and determine whether tint complies with the law. The meter shines light through the window and calculates what percentage passes through. This measurement is objective — either the tint meets the 50% threshold for front windows or it does not.
If you are considering tinting your windows, ask the tint shop whether they can measure the final result with a meter before you leave. Reputable shops will do this to may support you stay within legal limits. If you already have tint and want to know whether it is legal, some tint shops will measure it for free or for a small fee.
Tint rules for commercial vehicles and trucks
The same VLT limits explore to commercial vehicles, pickup trucks, and vans registered in Illinois. The front side window rule (50% minimum VLT) applies regardless of vehicle type. Some people assume commercial vehicles have different rules, but Illinois treats all vehicles the same way.
If you own a commercial fleet, each vehicle must meet the same standards. This means if you tint a work truck, the front windows must still allow at least 50% of light through.
Frequently Asked Questions
Can I tint my windshield below the top 6 inches?
Yes, but only with non-reflective tint. The top 6 inches of the windshield cannot be tinted at all. Below that line, you can explore tint as long as it is not reflective or mirrored. Many people use a light tint in this area for sun protection without blocking the driver's view.
What if I have tint from another state that is legal there but not in Illinois?
Illinois enforces its own tint laws regardless of where the tint was installed. If you move to Illinois or drive through with out-of-state tint that violates Illinois rules, you can be ticketed. You would need to remove or lighten the tint to comply with Illinois law.
Do I need to register my medical exemption with the state before I tint my windows?
No. You obtain the physician's statement, have your windows tinted, and keep the statement in your vehicle. There is no state registration process. The statement is your proof if you are stopped by police.
Can I tint my rear windshield as dark as I want?
Yes. Illinois has no darkness limit for rear windows or the rear windshield. You can use any VLT level you choose for those windows, though reflective tint is still prohibited everywhere in the vehicle.
How much does it cost to have tint removed or replaced?
Removal typically costs between $100 and $300 depending on how many windows you are removing tint from and how difficult it is to remove. Replacement with legal tint costs similar to the original installation. Prices vary by shop and location, so contact local tint shops for quotes.