Montana Window Tint Laws
Big Sky sun at altitude, with some of the most generous limits in the country: 24% front, 14% rear. Montana drivers can run genuinely dark film without a second thought.
Reviewed July 2026 · Passenger cars (sedans)
Legal tint limits in Montana
| Glass | Rule for passenger cars |
|---|---|
| Windshield | Non-reflective tint above the AS-1 line. |
| Front side windows | 24% VLT or lighter |
| Back side windows | 14% VLT or lighter |
| Rear window | 14% VLT or lighter |
| Reflectivity | No more than 35% reflective. |
| Medical exemption | Conditional — verify with the DMV |
What VLT means (and how police check it)
VLT — Visible Light Transmission — is the percentage of outside light that makes it through your glass. The number printed in the law is a floor: film may be that bright or brighter. Because factory glass already blocks a little light, an officer's meter reads the combineddarkness of glass plus film. A film sold as "24%" on top of factory glass can meter a few points darker — which is why professional installers measure the final result, not the box label.
Quality matters as much as darkness. Dyed films fade purple and bubble; ceramic films like ULTRASHIELD SHADOW reject heat and up to 99% of UV at any legal darkness, with no signal interference — so you get the comfort without gambling on the number.
Montana tint FAQ
What is the darkest legal tint in Montana?+
Can I tint my windshield in Montana?+
Does Montana allow medical exemptions for darker tint?+
Is ceramic tint legal in Montana?+
Are mirrored or reflective films legal in Montana?+
Get it installed right in Montana
ULTRASHIELD certified installers measure the finished VLT, use nano-ceramic SHADOW film, and register your warranty with CARFAX.
Own a shop in Montana? There's no certified ULTRASHIELD installer here yet — be the first. Apply to join the network →
This page summarizes Montana statute as published and was last reviewed July 2026. It is not legal advice. Laws change and local enforcement varies — confirm current rules with the Montana DMV before tinting.
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