California window tint laws
In California, front side windows must allow 70% of light through, back side windows no specified minimum, and the rear window no specified minimum. Non-reflective tint allowed on the top 4 inches
| Window | California rule |
|---|---|
| Windshield | Non-reflective tint allowed on the top 4 inches |
| Front side windows | 70% VLT minimum |
| Back side windows | No limit specified |
| Rear window | No limit specified |
| Reflectivity | Front and back side windows must not be more reflective than a standard window |
| Banned colors | red, amber, blue |
| Medical exemption | Yes |
| Statute | Cal. Veh. Code § 26708; medical exemption under AB 1303 (2017) |
What installers in California will tell you
Back side and rear windows may be any darkness for sedans, SUVs, and vans alike. A DMV medical exemption can allow 20-35% VLT on front side windows (case-by-case minimum darkness) plus clear UV-filtering film on the windshield; dual side mirrors are required if the rear window is tinted, and installers must certify film and keep a certificate on file.
Frequently asked questions
What is the darkest legal tint on front windows in California?
Front side windows must let at least 70% of light through in California. Film plus factory glass count together.
Can I use 5% tint in California?
California does not set a numeric limit for rear windows, so 5% is generally allowed behind the driver. Front side windows are still limited.
Does California allow a medical exemption for darker tint?
Yes. California allows darker tint with a qualifying medical condition; you typically need a physician's statement kept in the vehicle.
Can I tint the windshield in California?
Non-reflective tint allowed on the top 4 inches
Sources
Reference only, not legal advice. Statutes change; confirm with the California statute above before you install.