Montana window tint law
In Montana, a passenger car's front side windows must let in at least 24% of light; rear side windows: at least 14% of light in; rear window: at least 14% of light in. Source: Montana Code Annotated 2025 §61-9-405, checked November 2026.
| Front side windows | 24% At least 24% light transmission; reflectance no more than 35%. |
|---|---|
| Rear side windows | 14% At least 14% light transmission; reflectance no more than 35%. |
| Rear window | 14% At least 14% light transmission; reflectance no more than 35%. |
| Windshield | Clear below the AS-1 line; above it, no red, yellow or amber. |
| SUVs, vans, trucks | Rear window and side windows behind the front seat of multipurpose vehicles, vans and buses are exempt. |
| Medical exemption | Waiver from the highway patrol or local police on a physician's affidavit (MCA 61-9-428). |
The Montana front-side limit on a car
Levels we picture that meet the front-side limit: 70% (light)50% (medium-light)35% (medium)
Source
Montana Code Annotated 2025 §61-9-405
“the front side windows have sunscreening or other transparent material that has a luminous reflectance of more than 35% or has light transmission of less than 24%”
Checked November 2026. 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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