Maryland's window tint rules are based on how much light your windows let through
Maryland law allows window tinting, but only if your windows transmit a minimum amount of visible light. The state measures this with a number called Visible Light Transmission (VLT), which is the percentage of light that passes through the tinted window. The darker the tint, the lower the VLT percentage.
For the front side windows of your car, Maryland requires at least 35% VLT — meaning your tint can block up to 65% of the light. Your windshield can have a tint strip along the top, but only if it does not extend below the manufacturer's AS-1 line (the line marked on most windshields). The rear and back side windows have no VLT restriction in Maryland, so you can tint them as dark as you want.
These rules explore to sedans, SUVs, and most passenger vehicles. Trucks and vans have slightly different rules for rear windows, but the front window requirement stays the same.
Key Takeaways
- Front side windows must allow at least 35% of light through; anything darker violates Maryland law.
- Your windshield can have a tinted strip only above the AS-1 line, which is usually marked by the manufacturer.
- Rear and back side windows can be tinted as dark as you want with no legal limit.
- Police can measure your tint with a light meter during a traffic stop, and you can receive a citation if you are out of compliance.
- Removing illegal tint or having it re-applied to legal darkness is your responsibility if you are cited.
How Maryland measures window tint darkness
Maryland does not measure tint by the product name or brand — it measures by light transmission. When you buy window tint film or have it installed professionally, the product will be labeled with its VLT percentage. A 35% VLT film blocks 65% of light; a 50% VLT film blocks 50% of light.
Law enforcement uses a light meter (also called a tint meter) to check your windows during a traffic stop. The meter shines light through the window and reads the percentage that comes through. If the reading is below 35% for your front side windows, you are in violation. The officer records the measurement and issues a citation.
The challenge is that different meters can give slightly different readings on the same window, and tint can fade or shift over time. If you receive a citation and believe your tint is actually legal, you can request that the officer's meter be calibrated and certified, or you can have your own measurement taken by a tint shop with a calibrated meter. Some drivers fight citations this way, though the burden is on you to prove compliance.
What counts as a violation in Maryland
You are in violation if your front side windows transmit less than 35% visible light. This applies to both the driver's side and passenger's side front windows. It does not matter why your windows are dark — whether from factory tint, aftermarket film, or a combination — the measurement is what matters.
A windshield tint strip that extends below the AS-1 line is also a violation. The AS-1 line is usually a thin line or band printed on the windshield by the manufacturer, typically a few inches below the top. If your tint strip goes past that line, you are breaking the law even if the tint itself is light enough.
Rear windows and back side windows have no restriction, so you cannot be cited for tinting them. Some drivers tint the rear heavily and keep the front at 35% to stay legal while still getting privacy in the back.
The citation and penalty for illegal tint
If a police officer measures your front windows and finds them below 35% VLT, you will receive a citation. In Maryland, illegal window tint is typically a traffic violation, not a criminal offense. The fine varies by county and jurisdiction, but generally ranges from $70 to $110 for a first offense.
You have the option to pay the fine, contest the citation in traffic court, or fix the violation and show proof to the court. Many drivers choose to have the tint removed or re-applied at legal darkness, then request that the citation be dismissed or reduced. Some courts will reduce or dismiss the charge if you show proof of correction.
If you receive multiple citations for the same violation, fines can increase. The violation stays on your driving record and can affect your insurance rates, though the impact depends on your insurance company's policy.
Getting window tint installed legally in Maryland
If you want to tint your windows legally, the safest approach is to work with a professional tint shop. Tell the installer that you need 35% VLT for your front side windows and ask them to measure the finished product with a calibrated meter before you leave. A reputable shop will may provide that the tint meets Maryland law and will re-do the work if it does not.
When you purchase tint film, check the product label for its VLT rating. Common legal options for front windows are 35%, 40%, 50%, and higher. If you are unsure whether a product is legal, ask the shop or call the manufacturer — they can tell you the exact VLT.
For rear windows, you have complete freedom. Many drivers use 5% or 15% VLT film on the back to maximize privacy while keeping the front at 35% to stay legal. This is a common and legal setup in Maryland.
Medical exemptions for darker window tint
Maryland does allow medical exemptions for window tint that is darker than the standard 35% VLT requirement. If you have a medical condition that requires protection from sunlight — such as certain skin conditions, lupus, or severe photosensitivity — you may be able to obtain a medical exemption.
To get an exemption, you need a letter from a licensed physician stating that you have a medical condition requiring darker tint. You then submit this letter to the Maryland Motor Vehicle Administration (MVA) along with your vehicle registration. The MVA will issue you a medical exemption certificate, which you keep in your vehicle.
If you are stopped by police and have a valid medical exemption certificate, you can show it to the officer. The exemption protects you from citation for tint that would otherwise be illegal. However, the exemption is specific to your vehicle and your medical condition, so it does not transfer if you sell the car or change vehicles.
Frequently Asked Questions
Can I have a tint strip on my windshield in Maryland?
Yes, you can have a tinted strip along the top of your windshield, but only if it does not extend below the AS-1 line. The AS-1 line is usually marked on the windshield by the manufacturer, typically a few inches from the top. If your strip goes below that line, it is illegal.
What happens if I get pulled over with illegal tint?
The officer will measure your windows with a light meter. If your front windows are below 35% VLT, you will receive a citation with a fine. You can pay the fine, contest it in court, or fix the tint and ask the court to dismiss the charge. Some courts will reduce or dismiss citations if you show proof of correction.
Can I tint my rear windows as dark as I want?
Yes. Maryland has no VLT restriction on rear or back side windows, so you can use any darkness you want. Many drivers use very dark tint on the back while keeping the front at 35% to stay legal.
Do I need a medical exemption to get darker tint?
Only if you have a medical condition that requires it. You need a letter from a licensed physician and must submit it to the Maryland MVA to receive an exemption certificate. Without an exemption, your front windows must be at least 35% VLT.
How do I know if a tint product is legal before I buy it?
Check the product label for its VLT percentage. For front windows, you need 35% VLT or higher. A professional tint shop can also tell you whether a product meets Maryland law, and reputable shops will measure your finished windows to confirm they are legal before you leave.