Illinois Tint Law Checker.
Rear First, Then Front.
Two picks, the rear windows and then the front, and an answer from 625 ILCS 5/12-503.
In Illinois, the rear windows decide what the front side windows may carry. If nothing behind the driver is darker than 35 percent, the front side windows may carry nonreflective film of 35 percent or lighter. If the rear film is at least 30 but under 35 percent, or the rear glass is factory tinted, the front must be 50 percent or lighter. With aftermarket rear film darker than 30 percent, the front gets no film. The rear windows have no limit, with a side mirror on each side, and the windshield takes nonreflective film on the top 6 inches only. Cars properly registered in another state are exempt, and the medical exemption lifts the front and windshield rules.
Is your tint legal in Illinois?
Legal. With the rear at 35% or lighter, the front side windows may be 35% or lighter.
625 ILCS 5/12-503(a-5), verified 2026-10-08. Windshield: nonreflective film along the top only, no more than 6 inches down from the top of the windshield (where the as-1 line usually falls). Out-of-state registered cars are exempt.
Pick the rear first, because in Illinois the rear decides the front, then pick the front shade. The answer applies subsection (a-5) of the statute, and the note under it carries the date we last checked the text. The full rules, with the windshield, the medical exemption and the fines, are on the Illinois window tint law page, and the tint shades page simulates every shade we stock on one sedan photo. If the film already on your car is not legal, tint removal takes it off, and all-around removal runs $80 to $150.