Legal tint darkness varies by state and by which windows you tint
There is no single legal tint percentage across the United States. Each state sets its own rules about how dark your window tint can be, measured as Visible Light Transmission (VLT) — the percentage of light that passes through the tinted glass. A lower VLT number means darker tint. Most states allow darker tint on rear windows than on front windows, and some states don't regulate tint on rear windows at all.
The front windshield is regulated most strictly in every state. Most states prohibit any tint on the windshield except a small band at the top, usually between 4 and 6 inches. Side windows and rear windows have looser rules, and the rear window often has no legal limit at all.
You need to know your state's specific rules before you tint your car, because police can ticket you for illegal tint, and some states require you to remove it before you can pass inspection or renew your registration.
Key Takeaways
- Front windshields are restricted in all states, usually allowing only a small tinted band at the top, typically 4 to 6 inches.
- Front side windows have the strictest limits on darkness, ranging from 50% VLT in some states to 70% VLT in others.
- Rear windows and back windshields are often unregulated or have much looser limits than front windows in most states.
- Medical exemptions for UV sensitivity exist in many states but require a doctor's note and often a special permit.
- Penalties for illegal tint range from warnings to fines of $100 to $500 depending on the state and whether you have prior violations.
How tint darkness is measured and what the numbers mean
Tint darkness is measured as Visible Light Transmission (VLT), expressed as a percentage. A 70% VLT tint lets 70% of light through and blocks 30%. A 35% VLT tint lets only 35% of light through and blocks 65%. The lower the percentage, the darker the tint.
Most states measure tint using a device called a spectrophotometer, which shines light through the glass and measures how much passes through. Some states allow you to measure tint yourself with a handheld meter before installation, while others only measure it during a traffic stop or inspection. A few states don't use VLT measurements at all and instead use vague language like "no tint darker than factory-installed tint" — in those cases, you have to compare your tint to the original glass or ask a dealer.
The difference between legal and illegal tint can be just 5 to 10 percentage points, so if you are close to your state's limit, ask the tint shop to measure the finished product before you leave.
Front windshield tint rules in all states
Every state restricts windshield tint the same way: you can tint only a small band at the top, and the rest must remain clear. The band width varies by state, ranging from 4 inches to 6 inches measured from the top of the windshield. Some states measure the band as a percentage of the windshield height instead of a fixed number of inches.
The tint applied to that top band can be any darkness in most states, but a few states specify that even the top band must allow a minimum percentage of light through — usually 70% VLT or higher. Check your state's specific rule before you tint, because windshield violations are common and straightforward for police to spot.
Aftermarket windshield tint is illegal in all states. You cannot tint the entire windshield, even lightly. The only exception is factory-installed tint that came with the car when you bought it, which is always legal.
Front and side window tint limits by state
Front side windows (the windows next to the driver and front passenger) have the strictest limits on darkness. Most states require front side windows to allow between 50% and 70% of light through, meaning you can block 30% to 50% of light. A few states are stricter and require 75% to 80% VLT on front windows.
The following table shows common front window limits. Your state may fall into one of these categories, but you should verify your state's exact rule before tinting, because rules change and some states have different rules for sedans versus trucks or SUVs.
| Front Window VLT Requirement | Typical States |
|---|---|
| 50% VLT (darkest allowed) | California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming |
| 60% VLT | Alaska, Arizona, Idaho, Ohio (some counties) |
| 70% VLT or higher | Some states for certain vehicle types |
If your state is not listed or you are unsure, contact your state's Department of Motor Vehicles or highway patrol to confirm the exact rule for your vehicle type.
Rear window and back windshield tint rules
Rear windows and back windshields are regulated much more loosely than front windows. Many states have no legal limit on rear window tint darkness — you can tint them as dark as you want. Other states allow rear windows to be darker than front windows but still set a limit, typically between 20% and 50% VLT.
A few states treat the back windshield differently from rear side windows. For example, a state might allow unlimited tint on the back windshield but require 50% VLT on rear side windows. Always check whether your state distinguishes between these two.
Even if your state allows dark rear tint, some police officers may still stop you if they believe the tint blocks your view of the road or makes it impossible for them to see inside the vehicle during a traffic stop. Tint so dark that it appears opaque from the outside can draw attention even where it is technically legal.
Medical exemptions and special permits for tint
Many states allow darker tint than normal if you have a medical condition that requires protection from sunlight, such as severe UV sensitivity, lupus, or photosensitivity. To use a medical exemption, you typically need a letter from a licensed physician stating that you have a condition requiring UV protection and that tinted windows are medically necessary.
The process varies by state. Some states issue a special permit that you keep in your car and show to police if stopped. Other states straightforward require you to carry the doctor's letter. A few states allow medical exemptions only on rear windows, not front windows. Some states charge a small fee for the permit, usually $10 to $25.
Medical exemptions do not override the windshield rule — you still cannot tint your entire windshield even with a medical exemption. They typically allow you to tint front windows darker than the state normally allows, and sometimes allow unlimited rear window tint.
Penalties for illegal window tint
Penalties for illegal tint vary widely by state and by how dark your tint is. A minor violation — tint that is only slightly darker than the legal limit — might result in a warning or a fine of $25 to $100. A serious violation — tint that is significantly darker than allowed — can result in a fine of $100 to $500 or more.
Some states allow police to ticket you for tint during any traffic stop, while others require that tint be the reason for the stop. A few states do not allow police to stop you for tint alone but can ticket you if they stop you for another reason and notice illegal tint.
In many states, if you receive a ticket for illegal tint, you can remove the tint and show proof of removal to the court to have the ticket dismissed or reduced. Some states require you to remove tint before you can pass vehicle inspection or renew your registration. Check your state's rules about whether you can contest the ticket by removing the tint after the fact.
Frequently Asked Questions
Can I tint my windows darker if I have a medical reason?
Many states allow medical exemptions for conditions like UV sensitivity or lupus, but you need a doctor's letter stating the medical necessity. The exemption usually allows front windows to be darker than normal, and sometimes allows unlimited rear window tint. You may need to carry the letter in your car or obtain a special permit. Contact your state's DMV to learn the process.
What happens if I get pulled over with illegal tint?
You can receive a ticket and a fine, which varies by state from $25 to $500 depending on how dark the tint is. In many states, you can remove the tint and show proof of removal to the court to have the ticket dismissed or reduced. Some states require you to remove tint before you can renew your registration or pass inspection.
Can I have different tint darkness on different windows?
Yes. Most states allow you to tint front windows to one darkness level, rear windows to a darker level, and the back windshield to an even darker level or unlimited darkness. The front windshield can only have a small tinted band at the top in all states. Check your state's specific rules for each window location.
Do I need to tell my insurance company about window tint?
Most insurance companies do not require you to report legal window tint. If your tint is illegal, some companies may deny a claim if they believe the tint contributed to an accident, such as by blocking your view. It is safest to keep your tint within your state's legal limits.
Where can I find my state's exact tint laws?
Contact your state's Department of Motor Vehicles or highway patrol website. Many states post their tint rules online. You can also ask a professional tint shop in your state — they should know the local rules and can often show you samples of legal tint darkness for your state.