If you live with lupus, chronic migraines, or another condition that makes sunlight painful or even dangerous, Washington’s standard window tint limits can feel like they’re working against you. The state requires most vehicle windows to allow at least 24% visible light transmission (VLT), which still lets in significant UV exposure during your daily commute.
The good news: Washington state law specifically allows drivers and passengers with documented medical needs to install window tint darker than the legal limit on their vehicles. And unlike many other states, the process here is surprisingly straightforward: no state application, no special permit, no fees.
Here’s everything you need to know about getting a medical exemption for window tint in Washington, from qualifying conditions to what to keep in your glovebox.
What Washington Law Actually Says About Medical Tint Exemptions
Washington’s window-tinting rules are governed by RCW 46.37.430, the state statute governing safety glazing and sunscreening materials. Within that statute, there’s a specific provision that permits a darker tint for medical reasons:
A greater degree of light reduction is permitted on all windows and the top six inches of windshields of a vehicle operated by or carrying as a passenger a person who possesses a written verification from a licensed physician that the operator or passenger must be protected from exposure to sunlight for physical or medical reasons.
In plain English: if a licensed physician documents that you need protection from sunlight, you’re legally permitted to go darker than the standard 24% VLT limit on every window of your vehicle, including the front side windows and the top portion of the windshield.
A few critical details that make Washington’s exemption process different from other states:
- No state application or permit required: You don’t need to file paperwork with the Department of Licensing or any other state agency. The physician’s written verification is your exemption.
- No expiration date specified in the statute: Washington’s law doesn’t mandate renewal periods for the medical documentation, though keeping your letter current (updated within the last few years) is a practical safeguard during traffic stops.
- Covers passengers, not just drivers: If you regularly transport someone with a qualifying condition, the exemption still applies to your vehicle.
Which Medical Conditions Qualify?
Washington’s statute doesn’t list specific diagnoses; it broadly covers any condition in which a physician determines that the patient “must be protected from exposure to sunlight for physical or medical reasons.” That said, the conditions most commonly cited in medical tint exemptions nationwide include:
| Condition | Why Darker Tint Helps |
|---|---|
| Lupus (SLE) | UV exposure triggers flare-ups, including skin lesions, rashes, fatigue, and joint inflammation |
| Melanoma/skin cancer history | Ongoing UV avoidance is critical for reducing recurrence risk |
| Albinism | Absence of melanin creates extreme vulnerability to UV damage in both skin and eyes |
| Xeroderma pigmentosum (XP) | A rare genetic disorder that skin cannot repair UV-induced DNA damage, dramatically increasing cancer risk |
| Photosensitivity/photodermatitis | Abnormal skin reactions to sunlight, including redness, blistering, and pain |
| Chronic migraines with photophobia | Bright light and glare can trigger or intensify migraine episodes |
| Porphyria | Sun exposure causes severe burning, swelling, and skin damage |
| Solar urticaria | Sunlight triggers hives and allergic skin reactions within minutes of exposure |
| Drug-induced photosensitivity | Certain medications (including some antibiotics, diuretics, and chemotherapy drugs) dramatically increase sun sensitivity |
| Post-surgical light sensitivity | Recovery from LASIK, cataract surgery, or other eye procedures may require temporary UV protection |
This list isn’t exhaustive. If your physician believes your condition warrants additional sun protection while driving, they have the authority to write the verification letter even if your diagnosis isn’t on a “standard” list. Dermatologists, ophthalmologists, optometrists, and primary care physicians can all provide the required documentation.
How to Get a Window Tint Prescription: Step by Step
The process in Washington is simpler than most people expect. Here’s how it works:
- Talk to your doctor: Schedule an appointment with your physician, ideally, the specialist who manages your condition (a dermatologist for skin conditions, a neurologist for migraines, etc.). Explain that you’d like written verification for a medical window tint exemption under RCW 46.37.430.
- Get the verification letter: Your physician needs to provide a signed letter on their official letterhead that includes their name, medical license number, contact information, a statement confirming that your medical condition requires protection from sunlight, and, ideally, a recommendation for the level of tint darkness needed. There is no state-issued form to fill out; a well-drafted letter from your doctor is all Washington requires.
- Choose a qualified tint installer: This is where the film you select matters as much as the darkness level. Not all window films offer the same UV protection. For a medical exemption installation, you want a film that blocks 99%+ of UV radiation at every VLT level, which is exactly what premium ceramic films like XPEL PRIME XR and PRIME XR PLUS deliver. XPEL’s nano-ceramic films have earned the Skin Cancer Foundation’s Seal of Recommendation and provide SPF 1,000-equivalent protection regardless of the shade you choose. As an XPEL-authorized installer, MC Tint ensures your medical exemption tint is installed with compliant materials, proper certification stickers, and the precision that keeps your protection seamless.
- Keep the letter in your vehicle: Washington law requires that the written verification be carried in the vehicle at all times and presented to law enforcement upon request. The Washington State Patrol confirms this documentation must be available during any traffic stop. Store the original in your glovebox and keep a backup copy at home or in your phone.
Ready to get your medical exemption tint installed? Get a free quote →
How Much Is a Window Tint Ticket in Washington, and Can You Get One Dismissed?
Even with a medical exemption, it’s worth understanding what happens if you’re stopped. Window tint violations in Washington are classified as traffic infractions under RCW 46.37.430. Here’s what the penalty landscape looks like:
| Scenario | Typical Outcome |
|---|---|
| First offense, no medical exemption | Fine of approximately $124–$136; possible fix-it ticket requiring tint removal |
| Repeat offenses | Fines can accumulate with each citation; potential registration renewal issues |
| With a valid medical exemption letter | Present the letter at the stop most officers will clear the issue on-scene |
| Ticketed despite having an exemption | The letter serves as grounds for dismissal if you take the ticket to court |
If you do receive a window tint ticket and you hold a valid medical exemption, the documentation from your physician is generally sufficient to have the citation dismissed. Bring the original letter to your court date. Some jurisdictions also allow you to present proof of correction (removing illegal tint or showing valid medical documentation) to resolve fix-it tickets without a court appearance.
The key takeaway: a properly documented medical exemption protects you legally. But the letter has to be in the vehicle; a verbal explanation alone won’t prevent a citation.
What to Look for in a Medical Exemption Tint Installation
Not every tint job is created equal, and for a medical-exemption installation, the stakes are higher than cosmetic ones. Here’s what matters:
- UV rejection performance is non-negotiable: The whole point of a medical exemption is sun protection, so the film needs to deliver on that. Cheap dyed films darken the glass but may block far less UV radiation than you’d expect. Premium ceramic films like XPEL PRIME XR PLUS block over 99% of harmful UVA and UVB rays, from a near-clear 70% VLT to a 5% limo tint. That means your medical protection doesn’t depend on how dark you go.
- Certification stickers are required by law: Washington requires professional installers to place a compliance sticker between the film and the glass on the driver’s side window, identifying the manufacturer and installer. This sticker is your first line of defense during a traffic stop, showing the officer that the tint was professionally installed with certified materials.
- Choose an installer who understands exemption work: A shop experienced with medical tint knows how to match the VLT level to your physician’s recommendation, ensure every window is covered consistently, and advise you on what to carry in the vehicle. At MC Tint, we work with exceptional clients across Central Washington, from Ellensburg and Yakima to Cle Elum and Wenatchee, and every installation is backed by our 100% money-back guarantee.
Frequently Asked Questions
Can MC Tint issue the medical exemption for me?
No, and be cautious of any tint shop that claims they can. The exemption must be issued by a licensed physician. MC Tint handles the compliant installation after you’ve obtained your doctor’s letter. If you have questions about what your doctor’s letter should include, contact us, and we’re happy to walk you through it.
Does the exemption cover my windshield?
Washington’s statute permits additional tint on “all windows and the top six inches of windshields.” So yes, the medical exemption extends to the windshield visor strip area. A full windshield tint below the top 6 inches falls within the legal gray area. Discuss specific recommendations with your physician and installer.
Do I need to renew the letter?
The statute doesn’t specify an expiration, but a letter that’s several years old may raise questions during a traffic stop. Updating your documentation every 2–3 years or whenever you change physicians is a practical best practice.
What if I move to Washington from another state?
Other states’ medical exemption documents may not satisfy Washington’s requirements. It’s best to obtain a new verification letter from a Washington-licensed physician to ensure full compliance with RCW 46.37.430.
I don’t have a medical condition, can I still get a darker tint?
Without a medical exemption, Washington’s limits apply: a 24% VLT minimum on sedans (all windows) and no VLT restriction on the rear windows of SUVs, trucks, and vans. For a full breakdown, check out our FAQ page.
Protect Your Health, Stay Legal, Get It Done Right
If you qualify for a medical window tint exemption in Washington, you don’t have to choose between your health and staying on the right side of the law. The process is straightforward: get your physician’s letter, choose a quality installer with the right film, and keep your documentation in the vehicle.
MC Tint is Central Washington’s XPEL-authorized installer, serving Ellensburg, Yakima, Cle Elum, Wenatchee, and the surrounding areas. We install XPEL PRIME ceramic films that deliver 99%+ UV rejection at any shade, exactly the kind of protection your doctor is prescribing. Every job comes with our 100% money-back guarantee and a lifetime warranty from XPEL.
Ready to get started? Get a free quote or call us to discuss your medical exemption tint installation.
