Can You Have 5% Tint on Back Windows? Legal Limits by State

Can you have 5% tint on back windows? It depends on your state. 5% tint (also called "limo tint") is legal on rear side and back windows in some states, but illegal in others. Federal law does not regulate window tint darkness—each state sets its own visible light transmission (VLT) limits under motor vehicle codes. Always check your local DMV or state police website before applying tint.

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Governing Agencies & Legal Authority

Window tint laws fall under state motor vehicle codes, enforced by:

• State Departments of Motor Vehicles (DMVs) – Issue registration and compliance guidelines.
• State Police or Highway Patrol – Conduct roadside tint inspections and issue citations.
• Federal Motor Carrier Safety Administration (FMCSA) – Regulates commercial vehicles under 49 CFR Part 393.60, but does not set VLT limits for passenger cars.

Key Legal Definitions

• Visible Light Transmission (VLT): The percentage of light that passes through the window. 5% VLT means only 5% of light gets through—the darkest legal tint in some states.
• AS-1 Line: A marking on windshields indicating the top limit for tint application (usually 4–6 inches from the top).
• Reflectivity: Some states ban mirrored or metallic tints due to glare hazards.

State-Specific Tint Laws: A Comparative Table

Below is a snapshot of rear window tint laws in key states. Always verify with your state DMV for updates.

Note: Some states (e.g., New Hampshire, Vermont) ban all aftermarket tint on any window except for medical exemptions.

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1. Check Your State’s VLT Limit

• Visit your state DMV website or the International Window Film Association (IWFA) state law database: www.iwfa.com/laws.
• Use a tint meter (available at auto shops) to measure existing VLT if unsure.

2. Determine Eligibility for Exemptions

• Medical Exemptions: Required for states with strict limits (e.g., California, New York).
• Process: Obtain a signed physician’s note stating a medical condition (e.g., lupus, melanoma) that requires darker tint.
• Submission: File the note with your state DMV and carry a certificate in your vehicle.
• Example: In Texas, submit Form VTR-271 to the DMV for approval.

• Commercial Vehicles: Some states (e.g., Texas, Florida) allow darker tint on multi-purpose vehicles (MPVs) or limousines with proper documentation.

3. Purchase Compliant Tint Film

• Certified Film: Ensure the tint is labeled with VLT percentage and complies with state reflectivity rules.
• AS-1 Compliance: For windshields, never tint below the AS-1 line unless medically exempt.

4. Professional Installation (Recommended)

• DIY Risks: Bubbles, peeling, or improper VLT can lead to failed inspections or tickets.
• Certified Installers: Use shops that provide a compliance certificate for your records.

5. Pass State Inspection (If Required)

• Inspection Stations: Some states (e.g., Texas, Georgia) require annual safety inspections that include tint checks.
• Tint Meter Test: Officers use a photometer to measure VLT during traffic stops or inspections.

6. Carry Proof of Compliance

• Medical Exemption Certificate: Keep a copy in your glove box.
• Installer Receipt: Shows VLT percentage and compliance date.

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Compliance Mistakes to Avoid

1. Assuming "No Limit" Means No Rules: Even in Michigan (where darkness is unrestricted), reflective or red/amber tints are banned.
2. Ignoring Windshield Rules: Most states allow only 70% VLT on windshields, with a 4–6 inch top strip (AS-1 line).
3. Using Non-Certified Film: Cheap tints may not meet state reflectivity standards (e.g., California bans mirrored tints).
4. Failing to Update Registration: Some states (e.g., New Jersey) require tint modifications to be noted on your vehicle registration.

Exceptions & Special Cases

• Classic Cars: Some states (e.g., California) exempt pre-1978 vehicles from tint laws.
• Law Enforcement Vehicles: Police cars often use 5% tint under special permits.
• Rental Cars: Companies may apply legal tint but cannot exceed state limits.

Penalties for Illegal Tint

Pro Tip: In Texas, officers can issue a $1,000 fine for obstructing their view during a traffic stop, even if your tint is technically legal.

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Can I get pulled over just for having 5% tint?

Yes. Police can stop you solely for tint violations in most states. If your tint is darker than the legal limit, you risk a fix-it ticket or fine. In California, officers use tint meters during stops to verify compliance.

What happens if I fail a tint inspection?

You’ll receive a fix-it ticket (e.g., California’s "Notice to Correct Violation") with a deadline (usually 30 days) to remove or replace the tint. Failure to comply can result in additional fines or a court summons.

How long does a medical exemption for tint last?

Most states do not set expiration dates for medical exemptions, but some (e.g., Texas) require annual renewal. Always check with your state DMV for specific rules.

Can I tint my front windshield to 5% if I have a medical exemption?

No. Even with a medical exemption, most states limit windshield tint to 70% VLT (or a top strip only). 5% tint on a windshield is illegal nationwide due to safety risks.

Do factory-tinted windows count toward the legal limit?

Yes. Factory tint is included in VLT measurements. For example, if your rear windows have 20% factory tint and you add 5% aftermarket tint, the total VLT drops to ~1%, which is illegal in most states.

What’s the darkest legal tint for back windows in my state?

Use the IWFA’s state law database (www.iwfa.com/laws) or call your local DMV. For example:

• Texas: 25% VLT
• Florida: 15% VLT
• Michigan: No limit (but no red/amber tints)

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Action Plan for Legal Tint Compliance

• ✅Step 1: Check your state’s VLT limit using the IWFA database.
• ✅Step 2: If needed, apply for a medical exemption (physician’s note + DMV form).
• ✅Step 3: Purchase certified tint film with the correct VLT percentage.
• ✅Step 4: Have the tint professionally installed and request a compliance certificate.
• ✅Step 5: Pass state inspection (if required) and keep proof of compliance in your vehicle.
• ✅Step 6: If stopped by police, present your medical exemption or installer receipt if questioned.

Official State Resources & Contact Numbers

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Disclaimer: This article is for informational and educational purposes only. It does not constitute formal legal advice and does not establish an attorney-client relationship. Always consult your state DMV or a licensed attorney for specific legal questions.