Montana window tint laws
Among the more permissive states for front-side tint — 46 of 51 jurisdictions require more light through the front windows.
The legal limits
Will your film pass in Montana?
A trooper's meter reads the film and the glass. Factory glass runs about 78% VLT, so net VLT = film × glass — which is why "35% film" can fail a 35% state. Common shades over factory glass:
| Film | Meters at | Front side | Back side | Rear |
|---|---|---|---|---|
| 70% | 54.6% VLT | Pass | Pass | Pass |
| 50% | 39.0% VLT | Pass | Pass | Pass |
| 35% | 27.3% VLT | Pass | Pass | Pass |
| 20% | 15.6% VLT | Fail | Pass | Pass |
| 5% | 3.9% VLT | Fail | Fail | Fail |
Different glass or an odd shade? Run the exact numbers in the tint-law tool — it also emails you if Montana's law changes.
Across the state line
Shops near a border tint cars registered in both states. Montana front side: 24% VLT min — the neighbors:
Montana tint law FAQs
What is the darkest legal tint in Montana?
Front side windows must let through at least 24% of light, back side 14%, and the rear window 14%. Anything darker fails a meter check.
Is 20% tint legal in Montana?
A 20% film over factory glass meters about 15.6% VLT. That fails Montana's 24% front-side rule and it is legal on the back-side and rear windows.
Does Montana allow medical exemptions for darker tint?
Yes — Montana allows darker film with a qualifying medical exemption. Keep the exemption paperwork in the vehicle.
Is reflective or mirrored tint legal in Montana?
Montana permits some reflectivity within state limits — check the current administrative code for the exact percentage before installing mirrored film.
What is the windshield tint rule in Montana?
Montana allows windshield tint only at the top of the glass: Top AS1 line. Full-windshield film (outside a medical exemption) fails inspection.
Reviewed against state DOT/DPS regulations as of 2025. States amend tint law — verify with the Montana authority before installing. This is reference material, not legal advice.
Run a tint shop in Montana?
Wraptor quotes tint, wrap, and PPF jobs with the legal limits built in — plus scheduling, deposits, and a CRM that remembers every VIN.