Missouri regulates the windows beside the driver separately from the rear glass. Its current rule is not the older all-side-windows version sometimes found online.
Read the official sources ↓Rules by window
| Window | Requirement |
|---|---|
| Windshield | Aftermarket screening is generally prohibited except on the upper area normally tinted by the glass manufacturer. Section 307.173(1)–(2). |
| Front side | At least 35% light transmission and no more than 35% luminous reflectance, each with statutory ±3% tolerance; includes front sidewing vents. |
| Rear side | No tint limit under the current section 307.173, as confirmed by the Highway Patrol brochure. |
| Rear window | No tint limit under the current section 307.173, as confirmed by the Highway Patrol brochure. |
Use the current version
The Revisor identifies the current section as effective August 28, 2010. Older historical versions regulate side and rear glass differently. The current front-window test expressly includes the safety glass with the screening material.
Medical permits
Darker front-side tint requires a qualifying serious medical condition, a physician prescription and a Department of Public Safety permit. The Highway Patrol requests a prescription issued within the preceding year specifying the needed percentage. Carry the permit and prescription copy; the permit process also supplies a windshield sticker and rear decal. A prescription alone does not complete the permit process.
Inspection is not a compliance guarantee
The Highway Patrol says ordinary safety inspections do not check side/rear tint, although windshield material is inspected. Passing an inspection therefore does not establish that front-side tint is lawful.
Before you rely on this guide
This is general information, not legal advice, a vehicle inspection, or permission to install a particular film. Exceptions and enforcement procedures can depend on your circumstances.
- No tint-specific color prohibition or dual-mirror condition was established in these sources. Other visibility/equipment laws still apply.
The research date shows when the sources were checked. It is not the date the law took effect, and it does not mean this page is monitored continuously. This research preview still awaits human editorial review; we do not claim attorney review.
Official sources
- Missouri Revised Statutes 307.173, current version ↗
Current version effective August 28, 2010: front windows, glass-plus-film measurement, reflectance, windshield, permits and historical-plate exception.
- Missouri Highway Patrol: Window Tinting, SHP-510 ↗
September 2025 brochure confirms unrestricted rear glass, permit procedure and inspection scope.