Yes, 50% window tint is legal in Montana, but only for certain vehicle windows.
Montana’s vehicle equipment laws permit non-reflective window tinting at 24% light transmittance or higher on front side windows, rear side windows, and the rear window. A 50% tint meets this threshold, making it compliant for these areas. However, the windshield must remain unobstructed, with no tint allowed above the AS-1 line. The Montana Department of Justice (DOJ) enforces these standards, aligning with 2023 legislative updates that clarified reflectivity and medical exemption requirements. Vehicles failing inspections face fines, and local law enforcement may issue citations based on visual assessments.
Key Regulations for 50% Window Tint in Montana
- Front Side Windows: Must allow at least 24% light transmittance; 50% tint complies.
- Rear Side & Back Windows: No minimum transmittance requirement, but reflectivity must not exceed 35%.
- Windshield: Prohibited from any tinting except for the top AS-1 strip (typically 5 inches).
Local jurisdictions, such as Missoula County, have adopted stricter enforcement protocols, including mandatory sticker verification for medical exemptions. The 2026 compliance framework introduces digital inspection logs for tinted vehicles, requiring owners to provide manufacturer certification upon request. Non-compliant tints may trigger re-inspection fees or mandatory removal. Always verify tint specifications with a certified installer to avoid discrepancies during traffic stops or vehicle registration renewals.