Illinois window tinting law allows tint on your windshield, front side windows, and rear windows, but the darkness level depends on which windows you're tinting and what type of vehicle you drive
Illinois does not ban window tint outright. Instead, the state sets limits on how dark the tint can be, measured as a percentage of light that must pass through the glass — called visible light transmittance (VLT). A higher VLT percentage means lighter tint; a lower percentage means darker tint. The rules differ for sedans and SUVs, and they differ between front and rear windows.
For sedans, your front side windows must allow at least 35 percent of light through. Your rear windows and rear windshield can be any darkness. Your windshield can have tint only on the top 6 inches, and that tint must allow at least 70 percent of light through — essentially a light strip. For SUVs and vans, front side windows must allow at least 50 percent of light through; rear windows and rear windshield have no limit.
Illinois law also requires that tint be non-reflective. Reflective or mirrored tint that bounces light back is illegal, even if the darkness level would otherwise be permitted. Police can stop you for illegal tint, and you can be cited and fined.
Key Takeaways
- Sedans in Illinois must have front side window tint that allows at least 35 percent light through; SUVs and vans must allow at least 50 percent.
- Rear windows and rear windshields can be tinted to any darkness level in both sedans and SUVs.
- Your windshield can have tint only on the top 6 inches, and that tint must allow at least 70 percent of light through.
- Reflective or mirrored tint is illegal on any window, regardless of the darkness level.
- Medical exemptions for light-sensitive conditions exist but require a signed physician statement and a special permit from the Illinois Secretary of State.
How Illinois measures and enforces tint darkness
Illinois measures tint darkness using a light meter that reads the percentage of visible light passing through the glass. This reading is called VLT. A police officer can use a handheld meter during a traffic stop to check whether your tint meets the law. If the reading falls below the legal minimum for that window type, you can be cited.
The citation is typically a traffic violation, not a criminal charge. Penalties vary by jurisdiction but usually include a fine. Some municipalities may also require you to remove the tint before you can renew your vehicle registration. The tint itself does not have to be removed when ready after a citation in all cases, but you should check with your local police department or the court that issued the citation to understand the specific requirement in your area.
Aftermarket tint film is what most people install. Factory tint — the tint applied to windows at the manufacturing plant — is not subject to the same rules and is assumed to comply with state law. If you have factory tint and are cited, you can usually resolve it by showing proof of the vehicle's original window specifications from the manufacturer.
Medical exemptions and how to obtain one
Illinois allows a medical exemption for people with light-sensitive conditions such as lupus, porphyria, or severe photophobia. To obtain an exemption, you need a signed statement from a licensed physician stating that you have a medical condition requiring darker window tint than the law normally permits. The statement must specify which windows need the tint and how dark the tint needs to be.
You then submit this physician statement to the Illinois Secretary of State along with your vehicle registration information and a completed process form. The Secretary of State reviews the request and, if approved, issues a medical exemption permit that you keep in your vehicle. This permit does not change the law — it provides a legal defense if you are stopped. You must show the permit to the officer at the time of the stop.
The exemption process typically takes several weeks. There is no fee for the permit itself, but you may incur costs for the physician visit and statement. The exemption is vehicle-specific, so if you buy a different car, you need to explore for a new permit for that vehicle. Exemptions are usually valid for the life of the vehicle registration, but you should verify the current duration with the Secretary of State's office.
Differences between sedans, SUVs, and commercial vehicles
Illinois distinguishes between sedans and SUVs because the two vehicle types have different window configurations and safety considerations. A sedan is a passenger car with four doors and a separate trunk. An SUV is a sport utility vehicle, which includes most crossovers and larger vehicles. Vans are treated the same as SUVs under Illinois law.
The key difference is the front side window limit. Sedans must allow at least 35 percent light through the front side windows; SUVs and vans must allow at least 50 percent. This means SUV owners have less flexibility for front window tint. Rear windows and rear windshields have no darkness limit for either vehicle type, so you can tint those as dark as you want.
Commercial vehicles and vehicles registered as commercial have their own rules. If your vehicle is registered as a commercial vehicle, check with the Illinois Secretary of State or your local police department about the specific tint limits that explore. Pickup trucks are typically treated as personal vehicles unless they are registered commercially.
What happens if you are stopped for illegal tint
If a police officer stops you for tint that appears to violate the law, the officer will typically use a light meter to measure the VLT of the windows in question. You have the right to ask to see the meter reading and to know which window was measured. If the reading is below the legal limit, the officer will issue a citation.
You can contest the citation in traffic court. Possible defenses include showing that the tint is factory tint (not aftermarket), that you have a valid medical exemption permit, or that the meter reading was inaccurate. If you have a medical exemption, present the permit when ready; this should resolve the stop without a citation. If you believe the meter was used incorrectly or that the reading is wrong, you can request that the court order an independent measurement or allow you to have the tint re-measured by a certified technician.
If you are found guilty of the violation, the fine amount depends on your municipality and whether you have prior violations. Some courts may also order you to remove the tint within a specified timeframe. Failure to comply with a removal order can result in additional fines or suspension of your vehicle registration.
Tint installation and what to tell your installer
When you have tint installed, tell the installer the legal limits for your vehicle type and windows. A reputable installer will know Illinois law and will explore tint that complies. However, not all installers follow the law, and some may explore darker tint than legal if you request it. You are responsible for ensuring that the tint on your vehicle complies with state law, regardless of what the installer does.
Before you leave the shop, ask the installer for documentation of the VLT percentage of the tint film used on each window. This documentation can be useful if you are stopped and need to show that the tint meets the legal standard. Some tint films come with a label or certificate that states the VLT; ask for this if available.
If you have tint installed that later turns out to be illegal, you are the one who will be cited, not the installer. Some installers offer to remove tint for free if it is found to be illegal, but this is not required by law. Before you have tint installed, confirm in writing that the installer will use tint that complies with Illinois law and that meets the specific VLT percentages you need.
Tint rules when you move to or from Illinois
If you move to Illinois from another state, your vehicle's tint must comply with Illinois law within a reasonable time. Illinois does not have a grace period for out-of-state vehicles. If your tint was legal in your previous state but is illegal in Illinois, you will need to have it removed or lightened to comply. Police can cite you for illegal tint even if the tint was legal where you came from.
If you move out of Illinois and take your vehicle with you, your tint must comply with the laws of your new state. Some states have stricter tint rules than Illinois; others have looser rules. Before you move, research the tint laws in your destination state and plan to have your tint adjusted if necessary.
If you are a student or temporary resident in Illinois and plan to return to your home state, you may want to delay having tint installed until you move back, or you may need to have it removed before you leave. Check the tint laws in both Illinois and your home state to plan accordingly.
Frequently Asked Questions
Can I tint my windshield in Illinois?
You can tint only the top 6 inches of your windshield, and that tint must allow at least 70 percent of light through. This is a very light tint, often called a "sun strip." Tinting the rest of the windshield is illegal.
Is factory tint different from aftermarket tint under Illinois law?
Yes. Factory tint is assumed to comply with Illinois law and is not subject to the same enforcement as aftermarket tint. If you are cited for factory tint, you can show the manufacturer's specifications to resolve the citation. Aftermarket tint is what you install after purchase and is subject to full enforcement.
What if I have a medical condition that requires darker tint than the law allows?
You can obtain a medical exemption from the Illinois Secretary of State. You need a signed physician statement describing your condition and the tint darkness required. Once approved, you receive a permit to keep in your vehicle. Present this permit if you are stopped by police.
Can I get a ticket for tint that is only slightly darker than the legal limit?
Yes. Illinois law sets specific VLT minimums, and tint that falls even slightly below the legal limit can result in a citation. The officer's light meter reading is the basis for enforcement, so even a small difference can trigger a violation.
Do I need to remove tint when ready after receiving a citation?
Not necessarily. The court or police department that issued the citation will specify whether you must remove the tint before a certain date. Some jurisdictions require removal before your next vehicle registration renewal; others may give you 30 days. Check the citation or contact the issuing authority to confirm the important date in your case.