If you’re considering darker window tint for your vehicle, you’ve probably asked the big question:

Is 20% tint legal in Washington State?

The short answer is no — 20% window tint is not legal for most passenger vehicles in Washington.

But there’s more to the story.

In this detailed guide, we’ll break down Washington’s current tint laws, explain how Visible Light Transmission (VLT) works, outline exceptions for certain vehicles, and help you understand how to stay compliant while still achieving the sleek look you want.

If you’re planning to tint your car in Washington, this guide will help you avoid fines, failed inspections, and unnecessary headaches.

What Does 20% Window Tint Mean?

Before diving into legality, let’s clarify what “20% tint” actually means.

Window tint is measured by Visible Light Transmission (VLT) — the percentage of visible light allowed to pass through the window.

Higher VLT = Lighter tint
Lower VLT = Darker tint

So:

70% VLT = Very light
35% VLT = Medium shade
24% VLT = Dark (legal limit in WA)
20% VLT = Darker than legal limit
5% VLT = Limo tint (very dark)

With 20% tint, only 20% of visible light passes through the glass — meaning it blocks 80% of incoming light. It creates a bold, aggressive appearance, but it crosses the legal line for many drivers in Washington.

Washington State Tint Laws (2026 Update)

Under current regulations in Washington, the law requires:

🚗 Passenger Cars (Sedans)

Front side windows: Must allow more than 24% of light in
Back side windows: Must allow more than 24% of light in
Rear window: Must allow more than 24% of light in
Windshield: Non-reflective tint allowed on top 6 inches only

That means the darkest legal tint for most passenger cars is 24% VLT.

Since 20% is darker than 24%, it is not compliant.

What About SUVs, Vans, and Trucks?

Larger vehicles have slightly different rules.

For SUVs, vans, and trucks:

Front side windows: Must still allow more than 24% VLT
Rear side and rear windows: May be darker than 24%

This means 20% tint may be allowed on rear windows for SUVs and trucks — but not on the front side windows.

So if you’re driving a sedan, 20% is illegal all around. If you drive a truck or SUV, you may have some flexibility in the back only.

Visual Comparison: 20% vs Legal Tint

Here’s how tint percentages compare visually:

35% VLT – Clean, subtle factory look
24% VLT – Bold, dark but legal
20% VLT – Slightly darker, noticeably less light
5% VLT – Extremely dark limo tint

To the eye, 20% may not look dramatically darker than 24%, but legally that 4% difference matters.

Why Is 20% Tint Illegal in Washington?

Tint laws exist primarily for safety reasons.

🚔 Visibility for Law Enforcement

Officers must be able to see inside vehicles during traffic stops for safety.

🌙 Nighttime Driving Safety

Darker tint reduces visibility at night — especially in rain-heavy regions like Washington.

👁 Pedestrian & Driver Awareness

Visibility between drivers improves road safety at intersections.

The 24% threshold balances privacy and safety — which is why going darker can result in citations.

What Happens If You Install 20% Tint?

If law enforcement determines your tint is darker than allowed in Washington, you may face:

Traffic stop
Tint meter measurement
Fix-it ticket
Fines
Mandatory removal
Possible inspection requirements

While some drivers risk it hoping not to get stopped, enforcement varies by region and officer discretion. The safest approach is staying within legal limits.

Does Factory Tint Affect Legality?

Yes — and this is where many drivers make mistakes.

Most vehicles already have slight factory tint built into the glass (often around 70–80% VLT). When you add aftermarket film, the combined VLT becomes darker.

For example:

Factory glass at 75% VLT
Add 35% film
Final result could measure below legal limits

Professional installers use digital tint meters to calculate final VLT and ensure compliance.

Can You Get a Medical Exemption?

Washington does allow medical exemptions for drivers with qualifying conditions such as:

Lupus
Severe photosensitivity
Certain skin disorders

If approved, you may be allowed darker tint than standard regulations permit. However:

Documentation must be carried in the vehicle
Approval must follow state guidelines

Always confirm eligibility before installing darker-than-legal tint.

Is 24% Tint Dark Enough?

Many drivers worry that legal tint won’t provide enough privacy. The good news?

24% VLT is still quite dark.

It offers:

Significant glare reduction
Strong UV protection
Noticeable privacy
A sleek, custom appearance

When installed professionally — especially with ceramic film — 24% tint delivers excellent performance while remaining compliant.

The Benefits of Legal Window Tint in Washington

Even without going as dark as 20%, legal tint provides powerful advantages:

☀️ UV Protection

Blocks up to 99% of harmful UV rays, protecting your skin and interior.

🌡 Heat Reduction

Ceramic films significantly reduce infrared heat — ideal for summer months.

🌧 Glare Control

Helpful during Washington’s rainy and low-sun conditions.

🔒 Added Privacy

Prevents outsiders from easily viewing valuables inside your vehicle.

💺 Interior Preservation

Reduces fading, cracking, and wear on dashboards and seats.

Why Professional Installation Matters?

Attempting DIY tint or choosing an inexperienced installer increases the risk of:

Going below legal VLT limits
Bubbling and peeling
Purple discoloration
Uneven application

Professional shops measure VLT before and after installation to guarantee compliance with Washington regulations.

Final Verdict: Is 20% Tint Legal in Washington?

No — 20% tint is not legal for most passenger vehicles in Washington State.

Sedans: 20% is illegal on all side and rear windows
SUVs/Trucks: 20% may be allowed on rear windows only
Front windows must remain above 24% VLT

If you want to stay safe, avoid tickets, and maintain full compliance, 24% VLT is the darkest legal option for most drivers.

Stay Legal. Stay Stylish.

At AutoCraft Customz, we specialize in professional, law-compliant window tint installation tailored to Washington drivers. Our team ensures accurate VLT measurement, premium film performance, and flawless results.

If you’re considering window tint and want to make the right legal choice, contact AutoCraft Customz today.

Drive protected. Drive cool. Drive compliant.

Is 20% Tint Legal in Washington State? – World Law Digest