Utah tint rules at a glance
- Front side windows
- 35%
- Minimum VLT, film and glass together
- Back side windows
- Any
- Any darkness allowed
- Rear window
- Any
- Any darkness allowed
- Windshield
- Must keep at least 70% VLT; non-transparent material only in a strip above the AS-1 line or top 4 inches (whichever is lower) and a 3x4-inch lower-left corner.
- Reflectivity
- Any film or glass with a metallic or mirrored appearance is prohibited on every window.
- Medical exemption
- No
- Sticker or certificate
- Not required
- Two outside mirrors
- Required when the rear window is tinted
- Penalty
- Infraction (Utah Code 41-6a-1635(9)).
VLT is the share of light the glass lets through, film and glass together. Source: Utah Code § 41-6a-1635, checked Nov 5, 2026. Laws change; confirm with the statute before tinting.
Utah regulates window tint through Utah Code § 41-6a-1635. Below: the minimum visible light transmission (VLT) for each window, the windshield rule, what counts as too reflective, who can get a medical exemption, and how an officer checks a car at the roadside.
Legal tint limits in Utah
- Front side windows: at least 35% VLT.
- Back side windows: any darkness.
- Rear window: any darkness.
VLT is measured through film and glass together. Factory glass already blocks some light, usually landing between 70% and 80% VLT before any film, so a roll sold as "35%" on a window that started at 75% ends up darker than 35% once installed. Officers meter the finished window, not the box the film came in.
Windshield
Must keep at least 70% VLT; non-transparent material only in a strip above the AS-1 line or top 4 inches (whichever is lower) and a 3x4-inch lower-left corner.
Federal standard FMVSS 205 sets the baseline for the glass itself: the windshield and front side windows of a new car must transmit at least 70% of visible light. State law decides what film may be added afterwards, which is why the windshield rule is usually a strip above the AS-1 line rather than a percentage.
Reflective and colored film
Any film or glass with a metallic or mirrored appearance is prohibited on every window. No film colors are singled out.
Medical exemptions
Utah does not provide a medical exemption from its tint limits.
Stickers, mirrors and enforcement
No sticker or certificate is required for legal tint. If the rear window is tinted, the car must have outside mirrors on both sides. Infraction (Utah Code 41-6a-1635(9)).
In practice
HB 112 (2025), effective May 7, 2025, lowered the front side window floor from 43% to 35% and wrote in a 5% variance when an officer meters the glass, so readings down to about 30% are not cited. Rear side and rear windows may be any darkness, but any tinted window triggers a requirement for both left and right outside mirrors. The statute bars officers from asking the Motor Vehicle or Driver License divisions to suspend a registration or license over a transmittance violation. Older charts still show 43%.
Sources
Checked Nov 5, 2026. Laws change; confirm with the statute before tinting.
Common questions about tint in Utah
Is 35% tint legal on front windows in Utah?
Yes. 35% is the darkest Utah allows on front side windows: the glass and film together must let at least 35% of visible light through. Anything darker fails a meter check.
Can I tint my windshield in Utah?
Must keep at least 70% VLT; non-transparent material only in a strip above the AS-1 line or top 4 inches (whichever is lower) and a 3x4-inch lower-left corner. Film below that line is not permitted for ordinary drivers.
Does Utah allow darker tint for medical reasons?
No. Utah's statute does not provide a medical exemption from its tint limits.
What happens if my tint is too dark in Utah?
Infraction (Utah Code 41-6a-1635(9)).
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