If you're planning to tint your vehicle in Bloomington or Normal, Illinois, it's important to understand the state's window-tint requirements before choosing a film.
Illinois does not treat every vehicle window the same way. The rules include specific requirements for the front windshield and the windows immediately beside the driver, and some requirements depend on how the vehicle's rear windows are treated.
This guide explains the current rules in practical terms.
Important: This article is for general informational purposes, not legal advice. Illinois laws and enforcement practices can change. For a specific legal question, verify the current requirements with the appropriate Illinois authorities.
Is Window Tint Legal in Illinois?
Yes. Window tinting is permitted in Illinois, but the law places restrictions on where and how tint can be applied.
The Illinois Vehicle Code addresses window treatment and tinted film under Section 12-503.
The most important point is that you shouldn't assume a tint percentage that works on one window can automatically be used on every window of your vehicle.
What Does Illinois Law Say About the Front Windshield?
The front windshield is heavily restricted.
Illinois law prohibits tinted film and other window applications on the front windshield, with an exception for a nonreflective tinted film along the uppermost portion of the windshield that does not extend more than 6 inches down from the top.
The Illinois Secretary of State's 2026 Rules of the Road similarly states that tinted windows are not allowed on the front windshield and that a 6-inch strip is allowed along the top.
So if you're thinking about installing a dark film across the entire windshield, don't.
What About the Front Side Windows?
This is where Illinois' rules become more specific. The windows immediately adjacent to the driver are subject to light-transmission requirements.
Under the current statute, one exception permits nonreflective tinted film allowing at least 50% light transmittance, with a 5% variance, when the windows behind the driver's seat are not treated in a way that allows less than 30% light transmittance.
Another provision permits nonreflective tint allowing at least 35% light transmittance, with a 5% variance, under a different condition involving the rear windows.
There is also a provision addressing vehicles with nonreflective smoked or tinted glass originally installed by the manufacturer on windows behind the driver's seat. In that situation, the statute specifies at least 50% light transmittance for the windows immediately adjacent to the driver, with a 5% measurement variance.
Why Does This Matter?
This is why simply telling a Bloomington driver:
"Illinois allows 35% tint."
is incomplete.
The legality of a particular installation can depend on the vehicle and the existing treatment of its other windows. The actual glass and film combination matters.
What About the Rear Windows?
Illinois law treats rear-window conditions as part of the rules governing the windows immediately beside the driver.
The statute specifically refers to how much light the windows behind the driver's seat allow through when establishing which front-side-window treatment is permitted.
This means the rear windows should be considered when determining an appropriate tint configuration for the vehicle.
A professional installer should take the vehicle's existing factory glass into account rather than treating every vehicle as if it starts with identical windows.
Can You Get Medical Tint Exemptions?
Illinois provides an exemption process for certain medical conditions.
The Illinois Secretary of State explains that qualifying individuals can apply for a tinted-window license plate based on a certified statement or letter from a licensed physician. The certification must be carried in the vehicle, and the state provides specific requirements for the certification and plate.
The Illinois Vehicle Code also contains provisions addressing qualifying medical conditions and window treatment.
If you believe you may qualify for a medical exemption, check the current Illinois Secretary of State requirements rather than relying on an installer or an old internet article.
What Happens If Your Tint Doesn't Comply?
Illinois law prohibits driving with window treatment that violates the applicable requirements, and it also places restrictions on installing or repairing prohibited material.
This is one reason it's worth discussing your intended tint configuration with a knowledgeable installer before installation.
Don't assume that because a film is available for purchase, it is automatically appropriate for every window of your vehicle.
Does the Tint Percentage Tell the Whole Story?
No.
"35% tint," "50% tint," and similar numbers refer to visible light transmission, but the final amount of light passing through the glass can depend on the combination of the vehicle's original glass and the film applied to it.
That's why a professional installation should consider the actual vehicle rather than only the film's advertised percentage.
How Should Bloomington-Normal Drivers Choose Their Tint?
Start with three questions:
1. What Does Your Vehicle Already Have?
Determine whether the vehicle has factory-tinted or smoked glass, particularly behind the driver's seat.
2. What Are You Trying to Achieve?
Are you looking for:
- Privacy?
- Appearance?
- Heat rejection?
- Glare reduction?
- UV protection?
- A combination of these?
Your answer affects the type and shade of film that makes sense.
3. Is the Configuration Appropriate for Illinois?
Before installation, make sure the intended film and shade are appropriate for the vehicle and current Illinois requirements.
If you're unsure, ask the installer to explain how the film interacts with the existing glass.
Choosing Between Carbon and Ceramic
Once you've determined what level of tint is appropriate, you'll still need to decide what type of film you want. That's where carbon vs. ceramic becomes relevant.
If you're comparing those options, read our guide to ceramic vs. carbon window tint. It explains the differences in performance, heat rejection, appearance, and value.
You can also start with our broader car window tinting guide for Bloomington, IL.
Window Tinting in Bloomington-Normal
For Bloomington and Normal drivers, the best window tint installation isn't simply the darkest tint available.
It's the combination of:
The right film + the right shade + proper installation + an appropriate configuration for the vehicle.
A professional installer can help you understand those choices before the film goes on the glass. Get a Window Tint Quote and discuss the right option for your vehicle.
Sources
- Illinois General Assembly — Illinois Vehicle Code, 625 ILCS 5/12-503.
- Illinois Secretary of State — 2026 Rules of the Road.
- Illinois Secretary of State — Tinted Windows information and certification requirements.
