Every tint shop owner gets the same question 10 times a day: "How dark can I legally tint my windows?" The answer depends on your state, your vehicle type, and how strict your county enforces. Here's the operator-friendly reference.
How to read tint law specs Three numbers + one position: - **Front side VLT %** — the legal minimum Visible Light Transmission for front side windows - **Rear side VLT %** — for rear side windows - **Back glass VLT %** — for the rear window - **Windshield strip** — the position of the highest legal windshield film (usually the AS-1 line, about 5-6 inches below the top)
Lower VLT % = darker tint. A 35% VLT film lets 35% of visible light through. A 20% VLT film lets only 20% through.
The headline categories
Strictest states (front side ≥ 50% VLT) - New Jersey: NO aftermarket tint on front sides - Vermont: NO aftermarket tint on front sides - California, New York, Pennsylvania, Hawaii: 70% - New Hampshire, Iowa, Michigan: 70%
Moderate states (front side 30-49% VLT) - Texas: 25% - Florida: 28% - Arizona: 33% - Georgia: 32%
Permissive states (front side < 25%, or any darkness with caveats) - Most western states allow lower VLT% on front sides - "Any darkness" on rear sides + back glass is common across permissive states
Multi-purpose vehicle exceptions Many states allow darker tint on rear sides + back glass of "multi-purpose vehicles" (SUVs, trucks, vans) than on sedans. This is hugely important at the quote-builder stage — your software should know the vehicle category before quoting.
Medical exemptions Most states allow medical exemptions that override the standard VLT minimums. The process varies: - Some states require a physician's letter - Some require a state-issued waiver certificate - The shop should keep a copy of the exemption with the customer record
Enforcement reality The legal limit and the enforced limit aren't always the same. From operator reports across our customer base: - **Strict enforcement**: New Jersey, California (LA/SF metros), New York (NYC metro), Florida (Miami-Dade, Broward), Texas (Harris, Dallas counties) - **Moderate enforcement**: most state DOTs run periodic checkpoints, especially during inspection-renewal periods - **Light enforcement**: rural counties + most of the Mountain West rarely stop drivers for tint alone
Where this lives in SalesThumb Each state has its own page on our site with current VLT specs + enforcement notes: - [Texas](https://www.salesthumb.com/regions/texas) - [California](https://www.salesthumb.com/regions/california) - [Florida](https://www.salesthumb.com/regions/florida) - [All 50 states](https://www.salesthumb.com/regions)
Our quote builder warns operators if they're quoting a darkness below the state's legal minimum so the front desk never accidentally puts the shop in violation.