Are License Plate Covers Illegal in Washington State?

License plate covers are legal in Washington state only if they leave the plate fully readable. Under RCW 46.16A.200, any cover, frame, or material that conceals, obstructs, or distorts a plate violates state law, and the base fine is $93 before court assessments.¹ A temporary warning-only period for cover violations expired on January 1, 2025, so officers now issue citations instead of written warnings.²

The Readability Standard

RCW 46.16A.200 requires every license plate to be kept clean, uncovered, and able to be “plainly seen and read at all times.” That standard applies to the state name, every letter and number, and the month and year registration tabs.¹ The statute makes it unlawful to use any cover or material that conceals, obstructs, distorts, changes, alters, or makes a plate illegible.

Washington does not distinguish between “mostly readable” and “totally hidden.” If a cover reduces legibility at all, it fails the test. Officers do not need to prove the plate was unreadable, just that the cover made it harder to plainly see and read.

Covers That Fail the Test

A few common types of covers routinely run into trouble:

Tinted, smoked, or colored covers. Any shading that darkens the plate makes characters harder to read, especially at night or on camera.
Reflective or glare-producing covers. These defeat automated cameras used for toll collection and red-light enforcement by bouncing light back at the lens.
Scratched, foggy, or UV-damaged clear covers. A cover that was transparent when new can yellow or haze over time. Once it reduces legibility, it violates the law regardless of the original intent.

What About Plate Frames

Frames sit around the edge of the plate rather than over its face, and Washington treats them differently. Frames are allowed, but only if they do not obscure the registration tabs or any identifying letters or numbers, and the plate can still be plainly seen and read at all times.¹

Dealership frames are the most common offenders. A thick bottom rail that covers a digit, or a top bar that hides the word “Washington,” turns a legal frame into an illegal one. Alumni and sports-team frames that run wide enough to overlap the registration tabs in the corners have the same problem. Before you install a frame, hold it against the plate and confirm nothing is blocked, tabs included.

The Fine

An illegible or obscured license plate is a traffic infraction. The base fine on the state’s judicial penalty schedule for a violation of RCW 46.16A.200 is $93.³ Statutory assessments and court fees are added on top, so the total you pay will be higher than $93, with the exact amount depending on the court handling the ticket.

Before January 1, 2025, officers could issue only a written warning for license plate cover violations. That grace period has ended, and citations now carry the full financial penalty.²

Why Enforcement Got Stricter

Washington uses automated license plate recognition cameras for toll collection on routes like SR 520, the I-405 express toll lanes, and the Tacoma Narrows Bridge. These systems photograph plates and match them to registered owners for billing. A tinted or reflective cover that a human officer might squint past can completely defeat a camera, causing missed toll charges that eventually convert to penalties or collections against the registered owner.

The same technology is used for red-light cameras and law enforcement databases that scan plates in real time. The legislature’s decision to end the warning period and impose fines starting in 2025 was tied to the growing reliance on camera-based enforcement.²

Plate Lamp Brightness

Federal safety standards require every vehicle’s license plate lamp to illuminate the entire plate surface to a minimum of 8 lux, with limits on how unevenly the light falls across the plate.⁴ A plate cover that scatters or absorbs light from the plate lamp can push illumination below that threshold, meaning the vehicle itself may no longer meet federal equipment standards. If you have a cover that dims the plate at night, removing it solves the state legibility problem and the federal lighting problem at once.

1
Washington State Legislature. Washington Code Title 46 Chapter 46.16A Section 46.16A.200
2
Washington State Legislature. Washington Code Title 46 Chapter 46.16A Section 46.16A.550
3
Washington Courts. Monetary Penalty Schedule for Infractions – IRLJ 6.2
4
eCFR. 49 CFR Section 571.108 Standard No. 108 Lamps, Reflective Devices, and Associated Equipment