Window tint looks great, blocks heat, and protects your interior — but go too dark on the wrong windows and you risk a ticket. If you are searching Missouri window tint laws before tinting your car here in the St. Louis area, this guide breaks down exactly what is legal in 2026, window by window.

At Dalo Motoring, we install window tint every day across Chesterfield, West County, and South County, and one of the first questions drivers ask is "how dark can I go?" Here is the straight answer.

Missouri Tint Limits at a Glance

Tint darkness is measured as VLT — Visible Light Transmission, the percentage of light the film lets through. A lower number means a darker tint. Missouri applies the same limits to sedans and SUVs/vans:

Front Side Windows: The 35% Rule

This is the one that gets drivers pulled over. Your two front windows — the ones next to the driver and front passenger — must let more than 35% of light through. That is dark enough to cut glare and heat and give a clean look, but light enough to keep you legal. Going darker than 35% on the front doors is the most common tint violation in Missouri.

Windshield, Back & Rear Windows

On the windshield you can only add a non-reflective strip along the top, above the AS-1 line (usually the top four to five inches). The back side windows and the rear window, however, have no darkness limit — you can go as dark as you like, which is why so many SUVs and trucks run a limo-dark look in back with a legal 35% up front. Keep in mind: if you tint the rear window, Missouri requires dual side mirrors so you still have clear rear visibility.

Reflectivity & Tint Colors

Beyond darkness, Missouri limits how reflective (mirrored) your tint can be: front and back side windows may not exceed 35% reflectivity. On color, you are in the clear — Missouri does not currently ban any tint colors, though most drivers stick with classic neutral shades. A quality ceramic film gives you strong heat rejection without needing to go mirror-like or extra dark.

Medical Exemptions

Missouri allows medical exemptions that permit darker tint for drivers with qualifying conditions such as light sensitivity, lupus, or certain eye disorders, with documentation from a licensed healthcare provider. If you think you qualify, bring your paperwork and we will help you tint within your exemption.

What If Your Tint Is Illegal?

Illegal tint in Missouri is typically a fine of up to $75 per infraction, and you may be required to remove or replace the non-compliant film. The bigger cost is redoing the work: tinting once, legally, is far cheaper than paying a fine and paying again to strip and re-tint. That is exactly why it pays to have it installed correctly the first time.

Frequently Asked Questions