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Montana State Regulations

Window Tint Darkness

Tint darkness for sedans:

  • Windshield: Non-reflective tint is allowed above the manufacturer’s AS-1 line.
  • Front Side windows: Must allow more than 24% of light in.
  • Back Side windows: Must allow more than 14% of light in.
  • Rear Window: Must allow more than 14% of light in.

Tint darkness for SUV and vans:

  • Windshield: Non-reflective tint is allowed above the manufacturer’s AS-1 line.
  • Front Side windows: Must allow more than 24% of light in.
  • Back Side windows: Any darkness can be used.
  • Rear Window: Any darkness can be used.

Window Reflection

  • Front Side windows: Must not be more than 35% reflective.
  • Back Side windows: Must not be more than 35% reflective.

 

Source: https://law.justia.com/codes/montana/2019/title-61/chapter-9/part-4/section-61-9-405/