Michigan window tint law allows tint on the windshield and the two front side windows only along the top 4 inches of the glass. The rear side windows and the back glass can take film of any darkness, as long as the film is not reflective. The rule comes from MCL 257.709 in the Michigan Vehicle Code, and it is stricter on the front glass than many drivers expect.
Window tint is one of the services at our shop in Shelby Township. Drivers looking into tint usually want to know how dark they can go, whether a car they just bought is legal, and what a medical letter actually covers. This guide walks through each window, the reflectivity rule, the medical exemption, what happens at a traffic stop, and how to care for new film. It is general information, written in plain words, so drivers can plan a tint job that stays legal.
What Michigan Window Tint Law Says
The section of law that covers tint is MCL 257.709. It sits in the part of the Michigan Vehicle Code that covers things that block a driver’s view. The full text is on the state legislature’s site, and anyone can read it here: MCL 257.709, Michigan Vehicle Code.
The law does not work the way most tint charts online suggest. Many charts list a light percentage for each window. Michigan’s statute is built around where film can go, not a light number for the front glass. On the front of the car, film is limited to a strip along the top. On the back of the car, darkness is open, and the main limit is reflectivity.
A driver who follows a percentage chart from another state may pick a light front film and still be outside Michigan law. The issue on the front side glass is placement, not darkness.
Michigan Tint Rules by Window
Each window has its own rule. The table at the end of this section sums them up.
Windshield
Tint film on the windshield is allowed only along the top edge. The film can come down no lower than the AS-1 line or 4 inches from the top, whichever is closer to the top. The AS-1 line is a small marking printed near the top edge of most windshields, and it is sometimes called the shade band line. Whichever mark sits higher is where the film stops. The strip stays at the very top, above the driver’s line of sight.
Front Side Windows
The driver and front passenger windows follow the same rule as the windshield. Only a strip along the top 4 inches can be tinted. No other tint is allowed on these two windows. This part of Shelby Township window tint law surprises many drivers. A light film across the whole front side window is still film across the whole window, and the statute does not allow it without a medical exemption.
Rear Side Windows
The rear side windows can take nonreflective film of any darkness. There is no light percentage limit in the statute for these windows. A driver can choose a light film for heat and glare or a very dark film for privacy. The limit is reflectivity, covered below.
Rear Window
The back glass follows the same rule as the rear side windows. Any darkness of nonreflective film is allowed. There is one more piece tied to the rear window: Michigan expects working side mirrors on both sides when the rear window is tinted.
| Window | What Michigan allows | Notes |
|---|---|---|
| Windshield | Film only along the top edge, down to the AS-1 line or 4 inches from the top, whichever is closer to the top | No film across the driver’s view |
| Driver and front passenger windows | Only a strip along the top 4 inches | No other tint unless a medical exemption applies |
| Rear side windows | Nonreflective film of any darkness | Film may not have total solar reflectance of 35% or more |
| Rear window | Nonreflective film of any darkness | Working side mirrors on both sides expected |
Reflective Film and the Mirror Look
When considering window tinting in Shelby Township, MI, it is important to understand that darkness is open on the rear glass, but shine is not. Michigan does not allow film with a total solar reflectance of 35% or more. In plain terms, that rules out the mirror, silver, and gold looks that bounce light back like a mirror. Those films make it hard for other drivers to see into the car and can throw glare at people on the road.
Reflectance is a rating that comes with the film, not something to judge by eye. That is one reason the film choice matters as much as the shade. Any shop should be able to confirm that the rear film is nonreflective before it goes on.
Side Mirrors and Rear Tint
The mirror rule is easy to miss because it is not about film. With a tinted rear window, the driver relies on the outside mirrors to see behind the car, so Michigan expects working side mirrors on both sides. A cracked mirror glass or a missing mirror should be fixed before rear tint goes on.
The Medical Exemption and How It Works
Michigan makes room for drivers who need more shade for health reasons. The medical exemption is for a person who is light-sensitive or photosensitive. Some health conditions and some medicines make bright light hard to handle, and the front glass rules can make driving uncomfortable for those people.
The statute sets four conditions:
- The person must be light-sensitive or photosensitive.
- The owner or driver must carry a letter signed by a physician or an optometrist.
- The letter must state that the tint is a medical necessity.
- The tint still cannot block the driver’s view of the road.
The exemption does not mean any film anywhere. The driver still has to see the road clearly at dusk, at night, and in a Michigan snowstorm.
The letter should stay in the car. If an officer asks about the front glass, the driver can show the letter right then. We suggest keeping it with the registration and proof of insurance, so it is always in the same place. A letter left at home does not help during a traffic stop.
For drivers who plan to use the exemption, the first step is a conversation with their doctor or optometrist. Once the letter is in hand, the tint plan can be built around it, while keeping the view of the road clear.
What Happens at a Traffic Stop
A tint violation can lead to a ticket in Michigan. Dark film across the front side glass is easy to see from outside the car, and without a medical letter, it is outside the rules.
A car that follows the window rules above, with nonreflective rear film and working side mirrors, meets the tint rules in MCL 257.709. A car with a medical exemption should have the signed letter in the glove box, ready to show.
Out-of-State Cars and Used Cars with Dark Front Tint
Two situations catch many Michigan drivers off guard.
Moving to Michigan with a Tinted Car
Tint rules differ from state to state. Some states allow film on the front side windows. A car that was legal back home may not meet Michigan’s front glass rule once it is driven here. Drivers who move to Shelby Township, Rochester Hills, or anywhere else in the state should check the front glass against the Michigan rule. If the front side windows have film across the full glass, the car does not match Michigan’s front glass limits.
Buying a Used Car That Already Has Dark Front Tint
This one catches a lot of buyers. A used car shows up with dark film on every window, and the new owner assumes it must be fine because someone else drove it that way. The law follows the car on the road, not the person who installed the film. Our advice is to have film removed from the front side windows that goes beyond the top 4-inch strip, unless a medical exemption applies to the new driver.
Film removal is something to ask about when calling a tint shop. Old film can be stubborn, and removing it with care protects the glass and the defroster lines on the back window. After removal, the front side windows can get a legal top strip, and the rear glass can be tinted to whatever darkness the new owner wants, as long as the film is nonreflective.
Why Film Quality Matters
Low-grade film can fade, turn purple, bubble, or peel over time. It can also throw a hazy look that makes the glass harder to see through. None of that helps a driver on a dark road in January.
Our window tinting in Shelby Township service features Geoshield film. When comparing films, ask about clarity, how the color holds up over time, and how the film looks on the glass. The install matters too. Clean edges, no dust under the film, and a careful fit around the top of each window make the difference between tint that looks factory and tint that looks like an add-on.
A good install also respects the law from the start. On the front glass, that means a straight, even strip that stops at the right line. On the rear glass, it means nonreflective film and a fit that leaves the defroster lines working.
Heat, Glare and UV Comfort
Window film does more than add privacy. It blocks some of the sun’s heat, which helps keep the cabin cooler on summer days along M-59 and Hall Road. It cuts glare from the sun and from snow on bright winter mornings. Good film also blocks UV rays, which helps protect the people inside and slows fading and cracking on seats, trim, and the dash.
Rear tint gives most of this benefit to passengers in the back seat. The legal windshield strip helps with low sun on the drive home. Comfort varies by film and by car, so it is worth asking how a given film performs on a specific vehicle.
What to Ask a Tint Shop Before Booking
A few questions help any driver plan a legal tint job:
- Which windows will get film, and where will the film stop on the windshield and front side windows?
- Is the rear film nonreflective?
- What film brand will be used, and how does it hold up over time?
- Can the shop remove old film if the car already has tint?
- What aftercare steps should the owner follow, and for how long?
- How does the shop handle a medical exemption letter?
Clear answers to these questions are a good sign. Reviewers mention clear explanations and honest advice with no upsell pressure at K&D Auto Spa – Detailing.
Caring for New Window Tint
New film needs a little time to settle onto the glass. During that time, a few simple habits protect the result:
- Keep the windows rolled up until the installer says it is safe to lower them. Rolling them down too soon can lift the bottom edge of the film.
- Small water pockets or a slight haze in the first days are normal as the film dries. They usually clear on their own.
- Clean tinted glass with an ammonia-free glass cleaner and a soft cloth. Ammonia can break down film over time.
- Skip scrapers, razor blades, and rough sponges on the inside of tinted glass.
- Be gentle around the rear defroster lines when cleaning the back window.
Ask the installer for written aftercare steps, including how long to wait before lowering the windows. Following them keeps the film clear and tight to the glass through Michigan winters and summers.
A Note on This Guide
This article is general information about Michigan window tint law, based on the text of MCL 257.709. It is not legal advice. Laws can change, and specific situations, such as a medical exemption, may need a conversation with a doctor or an attorney. For the exact wording, read the statute linked above.
Plan a Legal Tint Job in Shelby Township
Michigan window tint law is strict on the front glass and open on the back, and the right plan covers both. We tint cars for drivers from Shelby Township, Rochester Hills, Macomb, Utica, and nearby towns. To see what our tint service includes, visit our website. When the car is ready, book an appointment and bring any questions about each window. Questions about old film or a medical letter can go through our contact page.
FAQ
Is window tint legal in Michigan?
Yes, with limits. Michigan window tint law allows nonreflective film of any darkness on the rear side windows and the rear window. The windshield and the front side windows can only have a tinted strip along the top 4 inches. Film with total solar reflectance of 35% or more is not allowed on any window.
How dark can windows be tinted in Michigan?
The rear side windows and back glass can be as dark as the owner wants, as long as the film is nonreflective. The front side windows have no light percentage allowance in the statute. They can only have a strip along the top 4 inches, unless the driver has a signed medical exemption letter.
How does the Michigan medical tint exemption work?
The exemption is for a person who is light sensitive or photosensitive. The owner or driver must carry a letter signed by a physician or optometrist stating that the tint is a medical necessity. The tint still cannot block the view of the road, and the letter should stay in the car at all times.
Can a driver get a ticket for window tint in Michigan?
Yes. A tint violation can lead to a ticket. Dark film across the front side windows is easy to see from outside the car, and without a medical letter, it falls outside the rule. A car that follows the window rules, or carries a valid medical letter, meets the tint rules in MCL 257.709.
What should a buyer do about a used car with dark front tint?
Plan to have the film removed from the front side windows if it goes beyond the top 4-inch strip, unless a medical exemption applies. The law follows the car on the road, not the prior owner. After removal, the front glass can get a legal top strip, and the rear glass can stay dark.
Is mirror or reflective tint legal in Michigan?
No. Michigan does not allow film with a total solar reflectance of 35% or more. That rules out the mirror, silver, and gold looks. Rear windows can be very dark, but the film has to be nonreflective. Reflectance is a film rating, so it is worth asking the shop which film will be used.