What Is The Darkest You Can Tint Your Back Windows?

What Is The Darkest You Can Tint Your Back Windows?

The darkest you can legally tint your back windows varies significantly depending on the laws of the specific state or country you are in. In the United States, for example, each state has its regulations regarding window tinting, including specific rules for the darkness of tints allowed on rear windows. The darkness of window tints is measured by the percentage of Visible Light Transmission (VLT%)—the amount of visible light that can pass through the window. A lower VLT% means a darker tint.

Examples of State Regulations in the U.S.

  • California – Allows a minimum VLT of 70% for the front side windows, with no specified limit for rear side and back windows, meaning you can use a darker tint on these.
  • Texas – Permits a minimum VLT of 25% for all vehicle windows except the windshield, which has a different standard.
  • Florida – Allows a minimum VLT of 15% for rear side windows and 6% for the back window.

General Guidelines

  • Rear Side Windows and Back Window – Many states offer more leniency for the tinting of rear side windows and the back window, allowing darker tints compared to front side windows. It’s not uncommon for states to allow 20% to 5% VLT (very dark tints) on these windows.
  • Reflectivity and Color Restrictions – Besides VLT%, some states have restrictions on the reflectivity of the tint and prohibited colors, which can also affect how dark the tint appears.
  • Medical Exemptions – Certain states grant exemptions for drivers or passengers with medical conditions that require protection from direct sunlight. These exemptions might allow for darker tints than typically permitted.

Importance of Compliance

  • Legal Consequences – Non-compliance with state tinting laws can result in fines, being required to remove the tint, and even impoundment of your vehicle in extreme cases.
  • Safety Considerations – Extremely dark tints can reduce the driver’s visibility, especially in low-light conditions, potentially increasing the risk of accidents.


The darkest legal tint for your back windows depends on local laws, which can vary widely. Before tinting your vehicle’s windows, it’s crucial to check the specific regulations in your jurisdiction to ensure compliance. Professional window tinting services or your state’s Department of Motor Vehicles (DMV) can provide up-to-date information on legal tint limits.