Published on 3/31/2026, 12:00:00 AM

Maryland Window Tint Guide

If you drive in Maryland with tinted windows, you need to know the rules. Window tint violations can lead to traffic stops, repair orders, and even become the pretext for a vehicle search. Understanding what the law actually says can help you avoid unnecessary trouble and protect your rights if you do get pulled over.

Maryland’s window tint rules come from Transportation Article § 22-406 and are spelled out in detail in COMAR 29.02.01.11(F), which covers post-manufacture window tinting requirements for different types of vehicles.

The 35% Rule and How It Applies

The core rule is that regulated windows must allow at least 35% light transmittance after the application of post-manufacture window tint. But the specific requirements depend on what kind of vehicle you drive.

Passenger Cars, Convertibles, and Station Wagons

For standard passenger vehicles, every side and rear window is a “regulated window.” That means all of them must allow at least 35% light transmittance. You also cannot apply post-manufacture tint to the windshield below the AS1 line (a marking on the glass) or below 5 inches from the top of the windshield, whichever is less. If you have tint on any side or rear window, the vehicle must be equipped with an outside rearview mirror on each side.

Light Trucks, Vans, and Most Multipurpose Passenger Vehicles

For trucks, vans, and most multipurpose vehicles, only the side windows immediately to the right and left of the driver are regulated. Those front side windows must meet the same 35% light transmittance requirement. The windshield rules are identical to passenger cars.

Here is where it gets more flexible: windows to the rear of the driver can be tinted to any degree of darkness. So if you drive a pickup truck or SUV, you can go as dark as you want on the back windows and rear windshield, as long as the front sides stay at 35% or above and the vehicle has outside rearview mirrors on each side.

Vehicles Where Tint Is Prohibited on the Windshield and Front Windows

Post-manufacture window tint on the windshield or the windows immediately to the right and left of the driver is completely prohibited on:

Trucks over 10,000 pounds GVWR, truck tractors, and buses
Multipurpose passenger vehicles that seat 16 or more, were previously registered as a school vehicle or passenger bus, are primarily used to transport passengers, or exceed 10,000 pounds GVWR and are used for commercial purposes
Limousines

These vehicles can still have tint on windows to the rear of the driver at any darkness level, as long as the vehicle has outside rearview mirrors on each side.

School Vehicles

Post-manufacture window tint is prohibited on all windows and the windshield of a school vehicle. No exceptions.

Prohibited Types of Tint

Regardless of how light or dark it is, certain types of tint are banned on every window of every vehicle in Maryland:

Mirrored, one-way vision, or sparkling effect tint
Red, yellow, or amber color tint
Tint that changes to a red, yellow, or amber color

Even if your tint meets the 35% transmittance threshold, using any of these prohibited types will fail inspection and can result in a repair order.

Medical Exemptions Under § 22-406

Transportation Article § 22-406 provides an exemption for people who need protection from the sun for medical reasons. If you qualify, you are not required to meet the 35% transmittance standard on regulated windows.

To use the medical exemption, you must have a written certification from a physician licensed in Maryland that details your medical need for darker tint. That certification must be in the vehicle any time you are driving. If an officer stops you for tint, you should be able to produce the physician’s letter on the spot.

If your vehicle is inspected or you receive a safety equipment repair order for Defect #61 “TINT,” and you claim a medical exemption, the authorized inspection station will refer you to the Automotive Safety Enforcement Division of the Department of State Police. They will review your medical documentation and the vehicle’s tint. If everything checks out, they can certify the repair order.

One important limit: the medical exemption does not apply to the prohibited vehicle categories (trucks over 10,000 lbs GVWR, buses, limousines, certain multipurpose vehicles) or to school vehicles.

How Window Tint Leads to Criminal Cases

Tinted windows are one of the more common reasons for traffic stops in Maryland. An officer who believes your windows are too dark may pull you over, issue a citation, and hand you a vehicle equipment repair order. But a tint stop can quickly turn into something much bigger. Officers may use a tint violation as a reason to approach your vehicle, and from there they may claim to observe evidence of other crimes, like drugs or open containers.

That is exactly what happened in the landmark Maryland case on this topic.

State v. Williams: When a Tint Stop Is Unconstitutional

The Maryland Court of Appeals addressed window tint stops directly in State v. Williams, 401 Md. 676 (2007). In that case, police followed a vehicle for over a mile looking for a reason to stop it. The officer eventually pulled the car over because the windows were tinted. The officer had no training in determining whether the tint complied with state regulations, had never used a tint meter, and issued a repair order for the alleged equipment violation. After the stop, the officer searched the car and found drugs. A later inspection of the vehicle revealed that the tint actually complied with Maryland law.

The Court of Appeals affirmed the suppression of the evidence. The court held that an officer who has no tint detection training and stops a vehicle simply because the windows are tinted, with nothing more, violates the Fourth Amendment. The court reasoned that allowing such stops would strip the constitutional rights of every passenger in a vehicle with tinted windows, including people whose tint is perfectly legal.

The takeaway from Williams is significant: a stop based solely on the presence of window tint, without more, is not enough. The officer must be able to articulate a specific reason to believe the tint is illegal, such as explaining the difference between legal and illegal tinting based on training.

If you were stopped and your car was searched after a tint-related stop, you may have grounds to challenge the legality of that search.

What About Out-of-State Vehicles?

In Baez v. State, the Court of Special Appeals held that a vehicle with an out-of-state registration can still be stopped to check whether the tinting complies with Maryland’s regulations. So even if your car is registered in Virginia, D.C., or anywhere else, Maryland officers can still pull you over for tint they believe violates Maryland law.

Your Rights During a Window Tint Stop

If you are pulled over for window tint, you still have constitutional protections.

You do not have to consent to a search. A tint stop does not automatically give the officer the right to search your vehicle. Learn more about whether police can search your car without a warrant.

The officer needs reasonable suspicion. Under Williams, the officer must have an articulable basis for believing your tint is illegal. A bare observation that the windows “look dark” may not cut it. Read more about probable cause in Maryland.

Be polite but firm. You can assert your rights without being confrontational. Understand your rights during a traffic stop before you find yourself in that situation.

When to Call a Lawyer

If a window tint stop led to criminal charges, whether for DUI, drug possession, or anything else, the legality of the stop itself is the first thing a defense attorney should examine. Under State v. Williams, stops based on window tint without proper training or articulable suspicion are unconstitutional. If the stop was illegal, everything that came after it, including drug evidence, breath tests, or field sobriety tests, could be suppressed through a motion to suppress.

A Maryland traffic lawyer can evaluate whether the stop was justified and whether a suppression motion could get your case dismissed.

FAQs

Q: What is the legal window tint limit in Maryland?

A: For passenger cars, all side and rear windows must allow at least 35% light transmittance after post-manufacture tint is applied. For trucks and vans, only the front side windows must meet the 35% standard. Windows behind the driver on trucks and vans can be tinted to any darkness. The windshield cannot have tint below the AS1 line or below 5 inches from the top. These rules are found in COMAR 29.02.01.11(F).

Q: Can I get darker tint with a medical exemption?

A: Yes. Under Transportation Article § 22-406, a person who needs sun protection for medical reasons can get an exemption from the 35% transmittance requirement. You must carry a written certification from a Maryland-licensed physician in the vehicle at all times. The exemption does not apply to school vehicles, limousines, buses, or trucks over 10,000 pounds GVWR.

Q: What types of tint are illegal in Maryland regardless of darkness?

A: Maryland bans mirrored, one-way vision, or sparkling effect tint on all vehicles. Red, yellow, or amber colored tint is also prohibited, as is any tint that changes to those colors. These bans apply to every window on every vehicle type.

Q: Can police pull me over just because my windows are tinted?

A: Yes, but if you challenge it they will need more than a general belief the window tint was ilelgal. Under State v. Williams, 401 Md. 676 (2007), the Court of Appeals held that a stop based solely on the presence of tinted windows, without the officer being able to articulate why the tint appears illegal, violates the Fourth Amendment.

Q: Can I be stopped for window tint if my car is registered in another state?

A: Yes. In Baez v. State, the Court of Special Appeals held that a vehicle with an out-of-state registration can be stopped to determine if its tint level complies with Maryland law.

Q: Can a window tint stop lead to a drug charge?

A: It can and it does. Officers sometimes use equipment violations like tint as a reason to initiate a stop, and then claim to observe evidence of other crimes. However, if the initial stop was unlawful, the evidence found during the stop may be suppressed.

Q: Where do I get my window tint inspected?

A: Post-manufacture window tint must be inspected and certified at an authorized inspection station by a registered inspection mechanic. If you have a medical exemption, the inspection will be referred to the Automotive Safety Enforcement Division of the Department of State Police.