Tint Guide

What Is the Darkest Legal Tint in California?

Here's exactly how dark you can go on each window in California — and how a medical exemption lets you go even darker.

The Short Answer: There Is No “Dark” Legal Tint in California

California's 70% VLT front window limit is the strictest in the United States. Factory glass typically transmits 70-75% VLT, meaning any aftermarket tint on front side windows will almost certainly violate CVC §26708. Back side windows and the rear window can be any darkness on all vehicle types.

A medical exemption under CVC §26708(b)(3) is the only legal way to have meaningful tint on front windows in California.

Darkest Legal Tint by Window in California

Front Windshield

Non-reflective tint on top 4 inches only

No aftermarket tint below the AS-1 line. This applies to all vehicle types, even with a medical exemption.

Front Side Windows (Driver & Passenger)

70% VLT (strictest in the US)

At 70% VLT, factory glass barely qualifies. Any aftermarket film — even “clear” UV-blocking film — will likely push you below the legal limit. A medical exemption is the only way to have visible tint on front windows.

Back Side Windows

Any darkness (all vehicle types)

Unlike many states, California allows any darkness on rear side windows for all vehicles — sedans, SUVs, trucks, and vans.

Rear Window

Any darkness (dual mirrors required if tinted)

Any darkness permitted on the rear window. If tinted, the vehicle must have dual outside mirrors.

California vs. Neighboring States

California's front limit is dramatically stricter than every bordering state:

State	Front Side VLT
California	70% (virtually no tint)
Arizona	33%
Nevada	35%
Oregon	35%

Drivers crossing from Arizona or Nevada into California are immediately in violation if they have any visible aftermarket tint on front windows.

What Do Different VLT Levels Look Like?

70%

CA front limit (factory glass)

50%

Light tint (ILLEGAL on CA front)

35%

Legal in AZ/NV/OR (ILLEGAL in CA)

20%

Dark tint (needs CA exemption)

Limo tint (needs CA exemption)

Lower VLT = darker tint. California's 70% front limit is highlighted in red — it matches untinted factory glass.

Why California Drivers Need Tint Despite the 70% Law

A JAMA Dermatology studyfound significant left-side skin cancer asymmetry in drivers due to UVA radiation penetrating car windows. California's extreme UV exposure and long commutes make this especially dangerous:

Palm Springs / Inland Empire: UV index 11-12+, 300+ sunny days

Los Angeles: UV index 9-11, 284 sunny days, average commute 30+ minutes

Sacramento / Central Valley: UV index 10-11, 269 sunny days

San Diego: UV index 9-10, 266 sunny days

Ceramic tintis strongly recommended for California — it blocks 99% of UV radiation while maintaining better visibility than dyed films. Combined with a medical exemption, it provides maximum protection.

The Only Way to Go Darker: Medical Exemption

Under CVC §26708(b)(3), individuals with qualifying medical conditions can obtain a physician-certified exemption allowing darker tint on front side windows. This is the only legal path to meaningful front window tint in California.

California's large population means high prevalence of qualifying conditions: melanoma (CA #1 in total skin cancer cases), lupus (elevated in Asian-American communities), multiple sclerosis (highest total MS count by state), LASIK recovery (major markets in LA, SD, Bay Area), and many others.

What Happens If Your Front Tint Is Too Dark?

California tint violation penalties

First offense: ~$25 base fine / $197+ with penalty assessments (correctable citation)
Repeat offenses: $197+ per ticket, mandatory tint removal
CHP actively enforces on I-405, I-5, I-10, US-101, and all major freeways

A single California tint ticket costs nearly as much as the exemption itself ($225). The exemption prevents all future citations and can dismiss existing fix-it tickets.

California's 70% Law Means You Need an Exemption

A medical exemption under CVC §26708(b)(3) is the only way to legally have meaningful tint on front windows. Apply online in minutes.