Please read this full page on any inquires about the Illinois Window Tinting Law.

Illinois Window Tint Law

Illinois Window Tint Law Enacted: 2009

HOW DARK CAN WINDOW TINT BE IN ILLINOIS?Darkness of tint is measured by Visible Light Transmission percentage (VLT%). In Illinois, this percentage refers to percentage of visible light allowed in through the combination of film and the window.
WindshieldNon-reflective tint is allowed on the top 6 inches of the windshield.
Front Door WindowsMust allow more than 35% of light in.
Back Door WindowsMust allow more than 35%, 20%, or 5% of light in.
Rear WindowMust allow more than 35%, 20%, or 5% of light in.
HOW REFLECTIVE CAN THE TINT BE IN ILLINOIS?Similar to sunglass lenses, some tinting film contain metallic elements that help in reflecting incoming light and reducing the glare and heat generated by visible light.
Front Side WindowsMust be non-reflective, state law is not specific about what this means.
Back Side WindowsMust be non-reflective, state law is not specific about what this means.
OTHER ILLINOIS RULES AND REGULATIONS
Restricted ColorsNo colors of tint are explicitly banned.
Side MirrorsDual side mirrors are required if back window is tinted.
Certificate RequirementsManufacturers of film do NOT need to certify the film they sell in the state.
Sticker RequirementsNo sticker to identify legal tinting is required.
Medical ExemptionState allows medical exemptions for special tint. For more details about the specific terms of the exemption, consult your state law.