Idaho Window Tint Laws
Idaho's quirk is the back side windows: 20% there, but 35% on the rear glass. High-desert sun in Boise and long alpine drives make a quality ceramic film worth the spend.
Reviewed July 2026 · Passenger cars (sedans)
Legal tint limits in Idaho
| Glass | Rule for passenger cars |
|---|---|
| Windshield | Non-reflective tint above the AS-1 line. |
| Front side windows | 35% VLT or lighter |
| Back side windows | 20% VLT or lighter |
| Rear window | 35% VLT or lighter |
| Medical exemption | Available with qualifying documentation |
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 "35%" 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.
Idaho tint FAQ
What is the darkest legal tint in Idaho?+
Can I tint my windshield in Idaho?+
Does Idaho allow medical exemptions for darker tint?+
Is ceramic tint legal in Idaho?+
ULTRASHIELD installers in Idaho
Certified shops that install to your state's exact legal limit and register your warranty with CARFAX.
This page summarizes Idaho 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 Idaho DMV before tinting.
Local answers for Idaho drivers
Other states