New Mexico Window Tint Laws (2026): Legal VLT Limits
New Mexico Window Tint Laws (2026): Legal VLT Limits
New Mexico allows front side windows as dark as 20% VLT, making it one of the most permissive tinting states in the country. Back side and rear windows on sedans must also meet 20% VLT, while multipurpose vehicles (SUVs, vans, and RVs) may have any darkness on windows behind the driver.
What is the legal tint limit in New Mexico?
New Mexico sets a 20% VLT minimum for front side windows on all vehicles, which is among the loosest standards in the nation. VLT stands for Visible Light Transmission: a higher percentage means lighter tint (more light passes through), while a lower percentage means darker tint (less light passes through). At 20% VLT, a window blocks 80% of incoming light, producing a very dark appearance.
For sedans and passenger cars, the back side windows and rear window must also meet the 20% VLT minimum. Multipurpose vehicles, including SUVs, vans, buses, and RVs, face no VLT restriction on any windows behind the front driver and passenger positions. This sedan-versus-multipurpose distinction is written directly into NMSA 66-3-846.1(F).
| Window | Sedan / Passenger Car | Multipurpose Vehicle (SUV, Van, RV) |
|---|---|---|
| Front side windows | 20% VLT minimum | 20% VLT minimum |
| Back side windows | 20% VLT minimum | No restriction |
| Rear window | 20% VLT minimum | No restriction |
| Windshield | Strip above AS-1 line or top 5 inches only | Strip above AS-1 line or top 5 inches only |
Because 20% is already very dark, most popular tint shades (such as 35%, 50%, or limo 5%) are legal on New Mexico front side windows. Even limo-level 5% tint, while darker than the 20% minimum, is permitted on back side and rear windows of multipurpose vehicles with no restriction at all.
Windshield tint rules in New Mexico
The windshield carries the strictest rules. Non-reflective tint film is allowed only on the portion of the windshield above the AS-1 line (a marking on the glass itself) or on the top 5 inches, whichever applies to your vehicle. Below that line, the windshield must remain clear of aftermarket film.
Color restrictions apply specifically to the windshield strip: red, yellow, and amber tint colors are prohibited. The law also bars reflective or mirrored materials on the windshield, consistent with the statewide ban on mirrored films. All other windows must use non-reflective film as well.
Medical exemptions
New Mexico authorizes a medical exemption under NMSA 66-3-846.1. If a physician licensed in New Mexico or a New Mexico optometrist certifies that you have a medical condition requiring reduced light exposure, you may apply for an exemption that permits darker tint on windows that would otherwise fail the standard limits.
To use a medical exemption, you must carry the physician or optometrist affidavit in your vehicle at all times. The affidavit must specifically identify the condition and the windows covered. Officers may ask to see the documentation during a traffic stop. The exemption is issued under state law and applies on New Mexico roads.
How tint is measured and certified
Law enforcement in New Mexico uses a VLT meter (tintometer) to measure the percentage of light passing through a window. The instrument is placed against the glass and provides a reading that officers compare to the 20% threshold.
The state requires a compliance sticker that identifies the tint film installed. A reputable installer will affix this sticker, typically on the inside edge of the tinted window, after the job is complete. The sticker allows an officer to confirm that the film meets manufacturer specifications without retesting. No measurement tolerance (plus-or-minus range) is specified in the New Mexico statute, so readings at or above 20% are considered compliant.
Penalties for illegal tint in New Mexico
A violation of NMSA 66-3-846.1 is a penalty-assessment misdemeanor. The standard penalty is approximately $50. Although it is classified as a misdemeanor under New Mexico law, it is a civil penalty-assessment offense, meaning it is typically paid as a fine rather than resulting in a criminal court appearance.
Officers may issue a notice to correct the violation. Removing or replacing illegal tint before any follow-up inspection can resolve the matter without additional consequences, but the initial citation still carries the fine.
If you want to tint your windows in New Mexico
Because New Mexico's 20% minimum is so permissive, almost any commercially available shade is legal on your front side windows. Still, following a few practical steps protects you from any compliance issues.
First, decide on a VLT percentage at or above 20% for front side windows. For sedans, apply the same 20% floor to back side and rear windows. If you drive an SUV, van, or RV, windows behind the driver have no VLT minimum at all.
Second, choose a licensed window tint installer. Ask them to provide the compliance sticker that identifies the film used and confirm it is non-reflective. Avoid mirrored or metallic finishes on any window, and do not apply red, yellow, or amber tint anywhere near the windshield strip.
Third, if you need a medical exemption, obtain a signed affidavit from your New Mexico physician or optometrist before the tint is installed, and keep that document in your vehicle. An officer who sees a window darker than 20% will ask for documentation on the spot.
Finally, check for any local ordinances or rental/leased-vehicle restrictions that may impose tighter standards than the state minimum. If you are unsure whether your film is in spec, any reputable tint shop can test the installed glass with a VLT meter before you leave the lot.
This article is general legal information, not legal advice. Window tint limits vary by state and change, and enforcement depends on local practice and your specific vehicle. For a definitive answer, check your state DMV or consult a local attorney.
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Sources
- New Mexico Legislature, NMSA 1978, Section 66-3-846.1 (Motor Vehicle Window Tinting): https://nmonesource.com/nmos/nmsa/en/item/4391/index.do
Related
For a full national overview of tint rules and how New Mexico compares to other states, see the Window Tint Laws by State hub.
For rules on what you can and cannot mount on your windshield in New Mexico, see New Mexico Windshield Mounting Restrictions.