Massachusetts window tint law
In Massachusetts, a passenger car's front side windows must let in at least 35% of light; rear side windows: at least 35% of light in; rear window: at least 35% of light in. Source: Massachusetts General Laws ch. 90 §9D, Massachusetts Legislature (Internet Archive copy, 2026-05-17), checked November 2026.
| Front side windows | 35% At least 35% visible light transmittance; reflectance no more than 35%. |
|---|---|
| Rear side windows | 35% At least 35% visible light transmittance. |
| Rear window | 35% At least 35%, and only if the car has two outside mirrors. |
| Windshield | Transparent material only on the top 6 inches. |
| SUVs, vans, trucks | No separate rule for SUVs or vans. |
| Medical exemption | Exemption through the Registry's medical advisory board, with a physician's attestation. |
The Massachusetts front-side limit on a car
Levels we picture that meet the front-side limit: 70% (light)50% (medium-light)35% (medium)
Source
Massachusetts General Laws ch. 90 §9D, Massachusetts Legislature (Internet Archive copy, 2026-05-17)
“a visible light transmittance of not less than thirty-five per cent on the side windows immediately adjacent to the right and left of the operator's seat”
Checked November 2026 (read from an archived copy of the official page). A summary of the passenger-car rules, not legal advice: laws change, so check the source or ask a local tint shop before you buy.
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