Is 20% Tint Legal in Washington? VLT Laws Explained

Is 20% Tint Legal in Washington? VLT Laws Explained

Window tinting can improve your vehicle's appearance and comfort, but Washington State has specific laws that govern how dark your tints can be. Installing illegal window tint in Washington can result in traffic citations, failed vehicle inspections, and fines—plus you'll be required to remove the tint anyway. Understanding the state's VLT (Visible Light Transmission) requirements before you tint is the best way to avoid these issues.

Washington Window Tint Laws at a Glance

What Is VLT and Why It Matters

VLT stands for Visible Light Transmission. It's a measurement of how much light passes through your window tint, expressed as a percentage. A higher VLT percentage means more light gets through—so 70% VLT is much lighter than 20% VLT. Washington's laws specify minimum VLT percentages to ensure drivers maintain adequate visibility, which is essential for safe driving and law enforcement visibility.

When you get your windows tinted, the installer measures the combined light transmission of your factory windows plus the tint film. A 50% front side window tint means that window will transmit 50% of incoming light. The measurement is done from outside the vehicle, and it's what law enforcement officers check during traffic stops or vehicle inspections.

Front Windshield Rules in Washington

Washington allows tinting on your front windshield, but only above the manufacturer's AS-1 line (the line marking the top of the area swept by your windshield wipers). Tint applied above this line must have a VLT of 70% or higher, and it cannot be reflective or mirrored in appearance.

Below the AS-1 line, the windshield cannot be tinted at all. This requirement ensures that you maintain a clear view of the road ahead, especially for spotting pedestrians, cyclists, and oncoming traffic.

Front and Side Window Requirements

Your front side windows (driver and front passenger windows) are subject to different rules than your windshield. In Washington, front side windows must allow at least 50% of light to pass through. This is significantly darker than the 70% windshield requirement, giving you more privacy in those areas while still maintaining adequate visibility for safe driving.

To answer the primary question: No, 20% tint is not legal on your front side windows in Washington. You would need to use 50% tint or lighter on those windows. However, 20% tint is perfectly legal on your rear side windows and rear window, so you can achieve a darkened appearance in the back while complying with front window regulations.

Rear Window Tinting Rules

Washington's rear window laws are much more permissive. Both your rear side windows and rear window can be tinted as dark as you want—even 20% or darker. The only requirement is that your vehicle must have dual side mirrors if your rear window is tinted. This exemption exists because the dual mirrors provide adequate visibility for the driver without relying on the rear window.

If your vehicle comes equipped with dual mirrors from the factory, you're already compliant. Most modern vehicles have this feature, so rear window tinting is rarely a compliance issue in Washington.

Restricted Tint Colors

Washington does not restrict specific tint colors like red or amber. You can use any color film you prefer, as long as it meets the VLT requirements listed above. However, reflective or mirrored tint is prohibited on the front windshield (above the AS-1 line). For side and rear windows, reflective tint is allowed as long as the VLT percentage meets the legal standard.

Medical Exemptions for Window Tint

Washington State does allow medical exemptions for window tinting that exceeds legal darkness limits. If you have a medical condition that requires protection from sunlight—such as certain skin conditions, photosensitivity disorders, or lupus—you may qualify for an exemption.

To obtain a medical exemption, you must have a licensed physician fill out a Medical Exemption Request Form and submit it to the Washington Department of Licensing. Your doctor must certify that you have a medical condition requiring tint darker than legal limits. Once approved, you'll receive a medical exemption certification to carry in your vehicle. Keep in mind that medical exemptions typically allow darker tint, but they don't override all safety requirements—your windshield still cannot be tinted below the AS-1 line.

Penalties for Illegal Window Tint in Washington

If a law enforcement officer stops you for illegal window tint, you'll typically receive a traffic citation. The penalty is usually a fine of around $124 for the first offense. This is technically a "fix-it ticket," which means you can have the tint legally corrected and show proof of correction to reduce or dismiss the fine.

During vehicle inspections (required annually or biannually depending on your vehicle's age), inspectors will check your window tint compliance. If your tint is too dark, your vehicle will fail inspection. You'll need to remove or lighten the tint and pass re-inspection before you can register your vehicle.

Find a Tint Shop That Knows Washington Law

The easiest way to ensure your window tint is legal is to have it installed by a professional who knows Washington's specific regulations. TintingSource.com connects you with certified window tinting shops throughout Washington that understand state VLT laws and can recommend tint options that keep you compliant and looking great.

Visit TintingSource.com to find a reputable tint installer in your area and get started with a legal, professional tinting job today.