Missouri allows window tint on your car, but the darkness is limited by which windows you tint and whether you're driving during the day or night
Missouri's tint law sets specific limits on how dark your windows can be, measured in visible light transmission (VLT) — the percentage of light allowed through the tint. The rules differ for front side windows, rear side windows, and the rear window, and they also differ between day and night driving. Front windshields have the strictest rules, while rear windows have the most freedom.
The state does not require you to register your tint or get it pre-approved before installation. However, if a police officer stops you and measures your tint with a light meter, it must meet Missouri's standards or you can receive a citation. The fine for illegal tint is typically a traffic violation, not a criminal charge, but it can result in a ticket and a requirement to remove or lighten the tint.
Key Takeaways
- Front windshields can have tint only on the top 5 inches, and that tint must allow at least 70 percent of light through.
- Front side windows must allow at least 50 percent of light through during the day and at least 35 percent at night.
- Rear side windows and rear windows can be as dark as you want — there is no darkness limit for these windows.
- Missouri law does not require medical exemptions or special permits for tint, even for drivers with light sensitivity or medical conditions.
- If you are stopped for illegal tint, you can be cited and ordered to remove or lighten it, though the fine amount varies by county.
Front windshield tint rules in Missouri
Your front windshield can have tint only on the top 5 inches of the glass. That tinted strip must allow at least 70 percent of outside light to pass through it. This is the most restrictive rule in Missouri's tint law because the windshield is critical to your forward visibility and the visibility of your face to other drivers and law enforcement.
Many drivers use a tint strip or shade that covers the top portion of the windshield to reduce glare and heat. As long as it stays within the top 5 inches and meets the 70 percent VLT standard, it is legal. If you install tint that extends below 5 inches or is darker than 70 percent VLT, you are in violation and can be cited.
Front side window tint limits
Front side windows — the windows next to the driver and front passenger — have a two-tier standard in Missouri. During daylight hours, your front side windows must allow at least 50 percent of light through. At night, the law allows them to be darker: at least 35 percent of light must pass through.
This dual standard recognizes that darker tint is less of a safety concern at night, when visibility is already reduced and the contrast between your window and the outside is less noticeable. However, the law does not define specific times for "day" and "night," so the safest approach is to choose tint that meets the 50 percent daytime standard. That way you are legal at all times without worrying about the exact time of day.
If your front side windows are tinted to 50 percent VLT or lighter, you will not face a citation regardless of when you drive. If they are darker than 50 percent, you could be stopped during the day, though enforcement at night is less common.
Rear side and rear window tint — no darkness limit
Missouri places no limit on how dark you can tint your rear side windows or your rear window. You can use limo tint, which blocks nearly all light, and remain fully legal. This reflects the fact that rear windows do not affect your forward visibility or the visibility of your face to other drivers.
Many drivers use this freedom to tint rear windows as dark as they want for privacy or heat reduction. There is no registration, permit, or pre-approval needed. You can have your rear windows tinted to any darkness level and drive legally in Missouri.
How window tint darkness is measured and enforced
Window tint darkness is measured using a light meter or tint meter, a handheld device that shines light through the window and reads the percentage of light that passes through. The reading is the VLT percentage. Police officers in Missouri are trained to use these meters, and some departments carry them during traffic stops.
If an officer suspects your tint is too dark, they can use a meter to measure it on the spot. If the reading shows your tint is darker than the legal limit for that window, you can receive a citation. The officer will typically give you a ticket and inform you that you must have the tint removed or lightened within a certain timeframe — often 10 to 30 days, depending on the officer's discretion and local court rules.
Enforcement varies by county and city. Some areas are strict about tint violations, while others prioritize other traffic safety issues. However, if you are stopped for another reason — speeding, a broken taillight — and the officer notices illegal tint, they can cite you for that as well.
Medical exemptions and special circumstances
Missouri's tint law does not include a medical exemption. Unlike some states, Missouri does not allow drivers with photosensitivity, lupus, or other light-sensitive conditions to tint their windows darker than the legal limit, even with a doctor's note or special permit. If you have a medical condition that makes bright light painful or dangerous, you would need to explore other options, such as wearing sunglasses, using a sun visor, or driving during times when sunlight is less intense.
This is a significant limitation for some drivers, and it is worth knowing before you purchase a vehicle or plan your tint. If you have questions about your specific medical situation, you can contact your local Missouri police department or the Missouri State Highway Patrol to ask whether any exceptions exist in your area, though the answer is likely to be no.
What happens if your tint is too dark
If you are cited for illegal window tint in Missouri, the citation is typically a traffic violation, not a criminal charge. The fine amount varies by county and municipality but is usually between $50 and $200. In addition to the fine, you will be ordered to remove or lighten the tint within a set timeframe, often 10 to 30 days.
If you do not comply and are stopped again with illegal tint, you can receive a second citation and a higher fine. Some jurisdictions may also add court costs or require you to provide proof that the tint has been removed or lightened. The best course of action if you are cited is to have the tint adjusted or removed promptly and keep documentation of the work in case you are asked to prove compliance.
Frequently Asked Questions
Can I tint my windshield as dark as my rear windows?
No. Your windshield can only have tint on the top 5 inches, and that tint must allow at least 70 percent of light through. Your rear windows can be as dark as you want. The windshield rule is much stricter because you need to see through it to drive safely.
What if I have a medical condition that makes sunlight painful?
Missouri's tint law does not include medical exemptions. You cannot legally tint your windows darker than the legal limit, even with a doctor's note. You may want to explore other options, such as UV-blocking sunglasses, a sun visor, or a windshield shade.
Do I need to register my tint or get it approved before installation?
No. Missouri does not require registration, permits, or pre-approval for window tint. You can have it installed at any shop. However, if it is darker than the legal limit, you can be cited during a traffic stop.
How much does a tint violation fine cost in Missouri?
Fines vary by county and municipality, but typically range from $50 to $200. You will also be ordered to remove or lighten the tint within a set timeframe, usually 10 to 30 days. Court costs may explore depending on your local jurisdiction.
Can I have different tint darkness on my front and rear windows?
Yes. Your front side windows must meet the 50 percent VLT standard, but your rear windows can be as dark as you want. Many drivers use this to tint their rear windows much darker than their front windows for privacy and heat reduction.