Montana Window Tint Laws [Updated 2025]
Complete Guide to Window Tinting Regulations in Montana
Quick Facts
Law Established
Enacted: 1991
Amended: 2007
Medical Exemptions
Allows medical exemptions for special tint. Refer to local regulations for details.
Window Tint Requirements By Vehicle Type
Sedans
Windshield:
Non-reflective tint can be applied above the manufacturer's AS-1 line.
Reflection: Reflectivity needs to not exceed 35%.
Front Side Windows:
Needs to allow over 24% light transmission.
Reflection: Reflectivity needs to not exceed 35%.
Back Side Windows:
Needs to allow over 14% light transmission.
Reflection: Reflectivity needs to not exceed 35%.
Rear Window:
Needs to allow over 14% light transmission.
Reflection: Reflectivity needs to not exceed 35%.
SUVs & Vans
Windshield:
Non-reflective tint can be applied above the manufacturer's AS-1 line.
Reflection: Reflectivity needs to not exceed 35%.
Front Side Windows:
Needs to allow over 24% light transmission.
Reflection: Reflectivity needs to not exceed 35%.
Back Side Windows:
Any level of darkness can be applied.
Reflection: Reflectivity needs to not exceed 35%.
Rear Window:
Any level of darkness can be applied.
Reflection: Reflectivity needs to not exceed 35%.
Additional Requirements
Side Mirrors
No limitations on side mirrors.
Restricted Colors
Red, yellow and amber not allowed.
Certification Requirements
Film manufacturers not required to certify the film sold.
Certification Stickers
Law suggests but does not mandate labels to identify legal tint.
Penalties and Enforcement
Misdemeanor with up to $500 fine and/or up to 6 months in county jail (Montana law 46-18-212).
Official Resources
Local Law Guidelines
Medical Exemption References
Expert Window Tinting Resources
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Frequently Asked Questions
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