What the DMV checks about your window tint

The DMV does not issue tint permits or approve tint jobs. Instead, your state's DMV enforces tint laws during vehicle inspections and traffic stops by checking whether your windows meet the legal darkness limits. Each state sets its own rules about how dark tint can be, measured in a number called Visible Light Transmission (VLT) — the percentage of light allowed through the glass.

When an officer or inspector looks at your windows, they may use a device called a tint meter to measure how much light passes through. If your tint is darker than your state allows, you can receive a ticket, be ordered to remove the tint, or fail your vehicle inspection. The rules vary significantly by state, so what is legal in one place may be illegal in another.

Understanding your state's specific tint limits before you tint your windows saves you money and keeps you from having to remove tint later. Many people assume tint rules are the same everywhere and end up with illegal tint without realizing it.

Key Takeaways

  • Each state sets its own window tint darkness limits, measured as a percentage of light allowed through (VLT), and the DMV enforces these limits during inspections and traffic stops.
  • Front side windows, rear side windows, and rear windows usually have different legal tint limits in most states, with front windows required to be lighter.
  • Windshield tint is heavily restricted in all states — most allow only a small strip at the top, and some ban it entirely except for medical reasons.
  • If your tint fails inspection or you receive a ticket, you will need to remove or lighten the tint and may need to return for a re-inspection to clear the violation.
  • Some states allow medical exemptions for darker tint if you have a documented condition, but you must obtain a medical exemption certificate before tinting your windows.

How tint darkness is measured and what the limits are

Tint darkness is measured as Visible Light Transmission (VLT), the percentage of light that passes through the glass. A 50% VLT tint lets half the light through; a 20% VLT tint lets only one-fifth through. Higher percentages mean lighter tint; lower percentages mean darker tint. Most states require front side windows to be lighter (often 50% to 70% VLT) and allow rear windows to be darker (sometimes as low as 20% to 35% VLT).

The windshield is treated differently in nearly every state. Most states allow tint only on the top 4 to 6 inches of the windshield, or ban windshield tint entirely except for medical reasons. A few states allow no windshield tint at all. Because windshield rules are strict and vary widely, you should check your state's specific law before explore any tint to the windshield.

To find your state's exact tint limits, contact your state DMV directly or visit its website — the rules are too specific to state law to list here accurately. Some states post tint limits on their vehicle inspection pages; others require you to call or visit in person. Getting this information before you tint is much faster than getting a ticket afterward.

What happens if your tint is too dark

If an officer stops you or an inspector finds your tint too dark during a vehicle inspection, you will receive a ticket or a failed inspection notice. The consequences vary by state but often include a fine (typically $25 to $100 or more) and an order to remove or lighten the tint within a set time, usually 10 to 30 days.

After you remove or lighten the tint, you may need to return to the DMV or an approved inspection station for a re-inspection to clear the violation from your record. Some states allow you to show proof that you removed the tint (such as a receipt from a tint shop) instead of returning for a full re-inspection, but this varies. Check your ticket or inspection notice for the specific steps your state requires.

Driving with an unresolved tint violation can result in additional fines or a suspended registration, so it is important to address it promptly. If you believe your tint is within the legal limit, you can request that the tint be measured with a meter at the DMV or during a traffic stop to verify the reading.

Medical exemptions for darker tint

Some states allow darker tint than normal if you have a medical condition that requires protection from sunlight, such as severe photosensitivity, lupus, or certain eye conditions. To use a medical exemption, you must obtain a medical exemption certificate from your doctor before you tint your windows. The certificate must state the medical reason and be signed by a licensed physician.

You then submit this certificate to your state DMV, which may issue a medical exemption permit or notation on your registration. You must carry this permit in your vehicle at all times — if you are stopped and cannot produce it, you can still receive a ticket even with darker tint. The exemption typically applies only to the windows your doctor specifies and may need to be renewed annually or every few years, depending on your state.

Medical exemptions are not automatic and not available in all states. Contact your state DMV to learn whether medical exemptions are offered and what documentation your doctor needs to provide. Starting this process before you tint your windows prevents you from having to remove legal tint later.

Tint and vehicle inspections

During a state vehicle inspection, the inspector will check your window tint against your state's legal limits. If the tint passes, your inspection continues normally. If the tint fails, the inspection will be marked as failed, and you will not receive a passing inspection sticker until the tint is corrected.

A failed inspection for tint does not automatically suspend your registration, but you cannot legally drive with an expired inspection sticker in most states. You have a set window (usually 10 to 30 days) to correct the tint and return for a re-inspection. Some states allow you to get a temporary inspection extension while you address the tint, but you must request this at the time of the failed inspection.

If you plan to tint your windows, do it after your inspection passes, not before. This prevents the hassle of failing inspection and having to remove new tint. If you already have tint and your inspection is coming up, check your state's tint limits now so you know whether you need to lighten or remove it before the appointment.

Scam alert: Tint shops and false claims

Some tint shops claim they can explore "legal tint" that will pass inspection in any state or that the DMV has pre-approved certain tint products. This is false. The DMV does not pre-approve tint brands or shops, and no tint is legal everywhere — the rules change by state and sometimes by county. If a shop tells you their tint is "DMV-approved" or "may provide to pass inspection," that is a red flag.

Similarly, some shops sell "medical exemption" tint without requiring you to obtain a medical exemption certificate from a doctor first. This is not how medical exemptions work. You must have a doctor's certificate before you tint your windows, and you must carry it in your vehicle. Tint applied without a valid certificate is illegal, even if the shop claims it is for medical reasons.

Before you tint your windows, verify the legal limits directly with your state DMV, not with a tint shop. Once you know the limits, choose a reputable shop and ask them to explore tint within those limits. Get a receipt showing the VLT percentage of the tint applied, so you have proof if you are ever stopped.

Tint and out-of-state vehicles

If you move to a new state with tint that was legal in your previous state, your tint may now be illegal. You will not automatically receive a ticket, but you can be stopped and cited if an officer determines your tint exceeds the new state's limits. You have no grace period — the law applies as soon as you register your vehicle in the new state.

When you register your vehicle in a new state, check that state's tint limits when ready. If your tint is too dark, you will need to remove or lighten it before your first vehicle inspection or before you are stopped in traffic. Some states allow a short window to correct tint violations after you move, but this varies and is not may provide.

If you are unsure whether your tint is legal in your new state, visit a DMV office or call ahead and describe your current tint. They can tell you whether it meets the state's limits and what you need to do if it does not.

Frequently Asked Questions

Can I tint my windshield?

Most states allow tint only on the top 4 to 6 inches of the windshield, and some ban windshield tint entirely. A few states allow no windshield tint except for medical reasons. Check your state DMV's website or call to confirm the windshield rule before you tint, because windshield violations are common and straightforward to spot.

What if I have a medical condition that requires darker tint?

You must obtain a medical exemption certificate from your doctor before you tint your windows. The certificate must state your medical condition and be signed by a licensed physician. Submit it to your state DMV, which will issue a permit or notation. You must carry this permit in your vehicle at all times when driving with darker tint.

Do I need to tell the DMV before I tint my windows?

No, you do not need permission to tint your windows as long as the tint meets your state's legal limits. However, you should verify the limits before you tint so you do not end up with illegal tint. If you have a medical exemption, you must register it with the DMV before tinting.

How much does it cost to remove or lighten tint?

Tint removal or lightening typically costs $100 to $300 depending on how many windows you have and how difficult the tint is to remove. Prices vary by shop and region. Getting the tint right the first time by checking your state's limits beforehand is cheaper than paying to remove or lighten tint later.

Can I get a ticket for tint if I did not know it was illegal?

Yes. The law does not require you to know the tint limits, only that your tint complies with them. If you are stopped and your tint is too dark, you can receive a ticket regardless of whether you knew the limit. This is why checking your state's tint rules before you tint is important.