Washington's Car Window Tinting Rules Explained

How dark can your car windows be in the Evergreen State?

Published on Feb. 7, 2026

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Washington state has specific laws regulating how much window tinting is allowed on cars. Side windows must have a tint of 24% light transmission or clearer, while windshields cannot have any tinting below the AS1 line (or 6 inches from the top if no AS1 line is present). There are some exceptions for certain vehicles like emergency cars, but in general drivers need to keep their window tint within legal limits.

Why it matters

Window tint can be used for privacy, style, or to help with light-sensitivity issues, but going too dark can create safety concerns for law enforcement and emergency responders. Understanding the state's tinting rules helps drivers avoid costly fines and ensures visibility for public safety.

The details

Washington's window tinting laws, outlined in RCW 46.37.430, state that side windows must have a tint rated at 24% light transmission or clearer. Windshields also cannot have any tinting below the AS1 line, or 6 inches from the top if no AS1 line is present. There are some exceptions, like for emergency vehicles, hearses, and other specific cases detailed in RCW 46.37.430.5B.

  • The Washington state laws regarding window tinting have been in place since the 1980s.

The players

Yakima Police Department

The police department in Yakima, Washington, which provided guidance on the state's window tinting rules.

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What they’re saying

“Side windows must have window tint rated at 24% light transmission or clearer. Windshields cannot have ANY tinting below the AS1 line (if no AS1 line, cannot extend below 6' of top of windshield.)”

— Yakima Police Department (Yakima Police Department)

What’s next

Drivers in Washington should check their current window tint levels and make any necessary adjustments to comply with state laws. Auto shops can also provide guidance on legal tinting options.

The takeaway

While darker window tints may look stylish, Washington state has clear rules in place to ensure visibility and public safety. Drivers need to be mindful of the legal limits, which allow for some tinting but prohibit going too dark, especially on the windshield and front side windows.