In Massachusetts, legal tint is measured by VLT — the percentage of light the filmed glass lets through. The numbers below are the darkest tint the law allows at each window position, labeled VLT MAX: install film darker than the listed VLT and the vehicle is out of compliance. Figures are compiled from official Massachusetts state sources; laws change, so confirm the current statute before you tint.
| Window | Darkest Legal (VLT MAX) | Reflectivity |
|---|---|---|
| Windshield | Transparent material on the uppermost 6 inches only, and it may not encroach upon the area of the driver's direct forward viewing area as defined in the Federal Motor Vehicle Safety Standards — § 9D exemption (5) | |
| Front side windows | 35% — the material's visible light transmittance must be not less than 35%, and its total visible light reflectance not more than 35% — § 9D exemption (4) | |
| Rear side windows | 35% — same transmittance and reflectance figures as the front side windows — § 9D exemption (4) | |
| Rear window | 35% — same figures — § 9D exemption (4), conditioned on the vehicle being equipped with two outside mirrors, one on each side, adjusted so the driver has a clear view of the highway behind the vehicle |
How to Read These Numbers
- Windshield: The windshield rule controls the strip at the top of the glass and how far film or a visor band may extend down. Most states allow a non-reflective strip above the manufacturer's AS-1 line.
- Front side windows: Front side windows — driver and front passenger — are the most tightly regulated and the ones checked first at a traffic stop or inspection.
- Rear side windows: Rear side windows are usually allowed darker than the fronts, and on SUVs, trucks and vans they are sometimes exempt from the passenger-car limit.
- Rear window: The rear window rule often interacts with side mirrors: darker rear glass typically requires dual outside mirrors.
Getting tinted in Massachusetts?
95 shops listed statewide — compare ratings and call for a quote.
Massachusetts Tint Law Questions
What is the darkest legal tint in Massachusetts?
For front side windows, Massachusetts allows tint down to 35% — the material's visible light transmittance must be not less than 35%, and its total visible light reflectance not more than 35% — § 9D exemption (4) — the VLT MAX. Rear windows may allow darker film; check the table above for each position.
What happens if my tint is darker than Massachusetts allows?
Over-dark tint can draw a citation and, in many states, a fix-it order requiring the film to be removed and the vehicle re-inspected. Laws also change — verify the current statute before tinting.