Window Tint Medical Exemption in Washington
Washington allows darker film with a physician's written verification. Here is exactly what the law says.
The short answer
Washington allows a greater degree of light reduction — on all windows and the top six inches of the windshield — for a driver or passenger who has written verification from a licensed physician that they must be protected from sun exposure for physical or medical reasons.
This is subsection (5)(d) of RCW 46.37.430. It is short, and it is worth reading in full because the wording matters.
What the statute actually requires
- Written verification from a licensed physician. The statute says written verification, not a state-issued permit or a form from a licensing office.
- The verification covers a person, not a car. The wording is a vehicle "operated by or carrying as a passenger" a person who has the verification. So it can apply to a vehicle the person is driven in, not only one they drive.
- The reason must be protection from sun exposure for physical or medical reasons.
What it permits that the normal rules do not
"A greater degree of light reduction is permitted on all windows and the top six inches of windshields." That is broader than the standard allowance in two ways: it reaches the front side windows, which are otherwise capped at 24%, and it explicitly includes the top six inches of the windshield.
The statute does not state a specific darker number for medical exemptions. It says "a greater degree of light reduction" without setting a floor. We are not going to invent a figure that is not in the law.
Conditions this commonly comes up for
Photosensitivity is a feature of a number of conditions and of some medications. Lupus, porphyria, solar urticaria, xeroderma pigmentosum and photosensitivity caused by certain drugs are the ones that come up most often in this context. Whether any particular condition qualifies is a decision for a physician, not for a tint installer, and we will not advise on it.
What to do if this applies to you
- Talk to your physician and ask for written verification that you need protection from sun exposure.
- Keep it in the vehicle. If you are stopped, the verification is the thing that makes the film lawful.
- Tell us when you book, so we fit the film to what you actually need rather than to the standard limit.
We are a tint installer, not a legal or medical adviser. If you need certainty about your own situation, the statute text is public and linked above, and your physician is the right person for the medical half.
Questions we get
Do I need a permit from the state?
The statute requires written verification from a licensed physician. It does not describe a state-issued permit for this.
Does it cover the front windows?
Yes. Subsection (5)(d) says all windows, plus the top six inches of the windshield — which is broader than the normal rule.
How dark can I go with a medical exemption?
The statute says ‘a greater degree of light reduction’ and does not name a number. We will not make one up.
Does it apply if I am the passenger, not the driver?
The wording covers a vehicle operated by or carrying as a passenger a person with the verification.
Can you fit medical-exemption film?
Yes. Bring the verification and tell us when you book.