South Dakota Window Tint Laws: Complete Legal Guide

Window tint is a popular upgrade for vehicles across South Dakota, offering privacy, UV protection, and a sleek appearance. However, the state has specific regulations about how dark your tint can be, and violating these laws can result in fines and failed vehicle inspections. Understanding South Dakota's window tint rules before you tint your vehicle will save you time, money, and headaches down the road.

Quick Reference Table

Understanding VLT (Visible Light Transmission)

VLT stands for Visible Light Transmission, and it's a measure of how much light passes through your window tint. If a tint film has a VLT of 70%, that means 70% of the sun's visible light passes through the tint, while 30% is blocked. The lower the VLT percentage, the darker the tint—so a 20% tint is much darker than a 70% tint.

South Dakota uses VLT percentages to set legal limits for different windows. These limits exist to ensure drivers maintain adequate visibility for safe driving and so law enforcement can see into vehicles when needed. When shopping for tint or visiting a tint shop, always ask about the VLT rating of the film you're considering, and make sure it complies with your state's regulations.

Front Windshield Rules

South Dakota allows tinting on the front windshield, but with important restrictions. You can apply non-reflective tint to your front windshield as long as it allows at least 70% of light to pass through. This tint can only be applied above the manufacturer's AS-1 line—the line marked on the windshield by the vehicle manufacturer that typically runs across the upper portion where the sun shade would sit.

The reason for this rule is visibility and safety. The area below the AS-1 line is critical for the driver's forward vision, so South Dakota keeps that area completely clear of tint. Make sure your installer understands this line clearly, as improper windshield tinting is one of the most common violations officers catch during traffic stops.

Side Window Rules

For your front side windows (driver and passenger windows), South Dakota requires a minimum VLT of 70%, meaning the tint must allow at least 70% of light to pass through. This is a fairly permissive standard compared to many states, but it's still important to stay within the limit. Many drivers opt for lighter tints on front windows for this reason, choosing darker tints for the rear instead.

The good news is that South Dakota places no restrictions on your rear side windows. Once you move behind the front doors, you can tint as dark as you want. This gives drivers flexibility to get that completely blacked-out look they prefer while keeping the front windows legal.

Rear Window Rules

South Dakota imposes no restrictions on your rear window (back glass). You can apply any darkness of tint to your rear window without breaking the law. Many drivers take advantage of this by applying very dark tint—sometimes nearly opaque—to their rear windows for maximum privacy and heat rejection in the back seats or cargo area.

If your vehicle has dual mirrors (side mirrors on both sides of the vehicle), you still have no restrictions on rear window tinting. The dual mirror rule in some states allows darker rear window tint as a safety exception, but South Dakota doesn't have this restriction in the first place, so the question doesn't apply here.

Restricted Colors

South Dakota does not restrict specific colors of window tint. You can use any color of tint film—amber, red, blue, or any other shade—as long as the VLT percentage complies with state law. However, some tint colors may reflect light in ways that could potentially distract other drivers, so use judgment when choosing highly reflective or unusual colors.

The focus in South Dakota is on VLT and visibility, not on banning certain colors outright. This gives you freedom in how you style your vehicle while staying within the legal boundaries.

Medical Exemptions

South Dakota does not currently offer a formal medical exemption process for darker window tint. If you have a medical condition that requires additional UV or sun protection, your best option is to stay within the legal VLT limits (70% for front side windows and windshield) and consult with a dermatologist about alternative sun protection methods, such as sunscreen or UV-blocking clothing.

If you believe your situation warrants an exemption, you can contact the South Dakota Department of Public Safety to inquire about any special processes, but be aware that formal exemptions are not standard in this state. Always verify current regulations, as exemption policies can change.

Penalties for Illegal Tint

If you're caught with illegal window tint in South Dakota, you'll face a traffic violation. The typical fine for illegal tint ranges from $50 to $200, depending on the officer's discretion and whether you have prior violations. In many cases, law enforcement will issue a "fix-it ticket," which gives you a set amount of time (usually 10 to 30 days) to remove or correct the illegal tint and bring your vehicle back for inspection.

If you fail to correct the tint or don't show proof of compliance, the ticket can escalate to a misdemeanor in some cases. Additionally, vehicles with illegal tint will fail state inspection and safety checks, which means you won't be able to register your vehicle until the tint is corrected.

Find a South Dakota Tint Shop That Knows the Laws

The easiest way to ensure your window tint is legal is to have it installed by a professional who understands South Dakota's specific regulations. A certified tint installer will measure VLT accurately, apply tint correctly above the AS-1 line on your windshield, and help you avoid costly violations.

Visit TintingSource.com to find reputable, law-abiding window tint shops in your area of South Dakota. Our directory connects you with installers who specialize in compliant tinting and can answer any questions about what's legal in your state.