Wisconsin window tint law
In Wisconsin, a passenger car's front side windows must let in at least 50% of light; rear side windows: at least 35% of light in; rear window: at least 35% of light in. Source: Wis. Admin. Code Trans 305.32 (and Trans 305.34(6) for windshields), checked November 2026.
| Front side windows | 50% Glass plus film must let through at least 50% of visible light; non-reflective film only. |
|---|---|
| Rear side windows | 35% Glass plus film at least 35%; non-reflective. |
| Rear window | 35% Glass plus film at least 35%; non-reflective. Dual outside mirrors required if below 60%. |
| Windshield | Film only above the AS-1 mark and outside the critical area; if the windshield has no such mark, no film at all. |
| Tolerance | 3% |
| Medical exemption | Front side windows may go to 35% on a physician's or Christian Science practitioner's written recommendation, carried in the vehicle. |
The Wisconsin front-side limit on a car
Levels we picture that meet the front-side limit: 70% (light)50% (medium-light)
Source
Wis. Admin. Code Trans 305.32 (and Trans 305.34(6) for windshields)
“provided that the combination of the glazing and tinting film permits passage through the windows of at least 50% of the visible light striking the windows.”
Checked November 2026 (read from an archived copy of the official page). A summary of the passenger-car rules, not legal advice: laws change, so check the source or ask a local tint shop before you buy.
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