How to Get a Window Tint Exemption in California

A California tint exemption requires a signed medical statement from a licensed physician, submission to the DMV, and compliance with state laws. Exemptions allow darker-than-legal tints for verified medical conditions like light sensitivity or skin disorders. Follow the DMV's process to avoid fines.

Eligibility Requirements

  • Medical necessity: Must have a diagnosed condition (e.g., lupus, melanoma, porphyria, or severe photosensitivity).
  • Physician's statement: A licensed doctor must confirm the need for tint exemption in writing.
  • Vehicle ownership: Only applies to vehicles registered in your name or for which you're the primary operator.
  • Compliance: Exempt tints must still allow at least 70% light transmission on the windshield (side/rear windows may vary).

Step-by-Step Application Process

  1. Get a medical evaluation: Visit a physician to document your condition and request a signed tint exemption letter.
  2. Complete DMV forms: Fill out the REG 256 (Statement of Facts) and attach the physician's letter.
  3. Submit in person or by mail:
    • Bring forms, physician's letter, and vehicle registration to a DMV office.
    • Mail to: DMV, Attn: Special Processing Unit (include a check for fees if applicable).
  4. Receive approval: The DMV will issue an exemption certificate (keep it in your vehicle at all times).
  5. Install compliant tint: Ensure the tint meets the exemption's light transmission rules.

Physician's Letter Requirements

The letter must include:

  • Physician's name, license number, and contact info.
  • Your full name and diagnosed condition.
  • Statement: 'This patient requires window tint exemption due to [condition].'
  • Signature and date (must be within 90 days of submission).

Tint Exemption Rules by Window Location

Window Location Standard Legal Tint (No Exemption) Exemption Allowance Notes
Windshield 70%+ light transmission 70%+ (no darker) Exemption does not allow windshield tints below 70%.
Front Side Windows 70%+ light transmission Any darkness (with exemption) Must have exemption certificate in vehicle.
Rear Side Windows Any darkness Any darkness No exemption needed for rear windows (unless commercial vehicle).
Rear Window Any darkness Any darkness Must have dual side mirrors if tinted.

Common Mistakes to Avoid

  • Using an old letter: Physician's statement must be <90 days old when submitted.
  • Skipping DMV submission: Verbal approval or a doctor's note alone isn't enough-official DMV exemption is required.
  • Non-compliant tint: Even with an exemption, windshield tint below 70% is illegal.
  • Missing the certificate: Always carry the exemption document in your vehicle to avoid fines.
  • DIY tint installation: Poor-quality tint can fail inspections; use a professional installer.

Renewal and Reapplication

  • No expiration: Once approved, the exemption stays valid unless revoked.
  • Vehicle changes: Reapply if you switch vehicles (exemption is vehicle-specific).
  • Condition updates: If your medical condition changes, notify the DMV.

What If You're Pulled Over?

  • Show the exemption certificate and physician's letter to the officer.
  • Ensure tint levels match the exemption (police may use a tint meter).
  • If disputed, request a DMV inspection to verify compliance.