Window Tint
MCA 61-9-405 — front side windows at least 24% light transmission, rear windows 14%, and reflectance no more than 35%
- Front side windows may not have material with a luminous reflectance of more than 35% or a light transmission of less than 24%.
- The rear window and side windows behind the front seat may not have material with a reflectance over 35% or a transmission under 14%, except on a multipurpose vehicle, van or bus.
Who handles this in Montana: State Bar of Montana, Licensed Lawyer Montana; and legal aid programs and the state offices, listed in the Montana directory.
The rules do not reach a multipurpose vehicle with factory tint, a hearse, an ambulance, a government vehicle, or a vehicle with a valid certificate of waiver.
Owning or driving a vehicle in violation, or applying the material that causes one, is a misdemeanor.
The highway patrol or a local agency may grant a written waiver of the front side window standard for safety, security, or a medical reason backed by an affidavit of a physician, physician assistant or advanced practice registered nurse.
Sources for this section (3)
- MCA 61-9-405 — Windshields required, exception -- unobstructed and equipped with wipers -- window tinting and sunscreening -- restrictions -- exemptions -- definitions
- MCA 61-9-429 — Window tinting and sunscreening -- penalty
- MCA 61-9-428 — Window tinting and sunscreening -- waiver -- conditions
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Montana attorney.