Ontario window tint laws: what drivers need to know
Reviewed September 2026. Tint rules can change. Read this against the current Highway Traffic Act and the Ministry of Transportation inspection standard before you book — and check both again next year.
Ontario does not print “35% VLT” in the Highway Traffic Act. Shops that quote one magic number are mixing two different documents. We spec film against both, because a ticket and a failed safety are not the same problem.
The Highway Traffic Act — roadside
Section 73 is the on-road rule. It never uses the word tint. It bans colour coating that obstructs the driver’s view of the highway (73(2)), and coating on the windshield or the windows directly left and right of the driver that substantially obscures the interior from outside (73(3)).
That language is qualitative. An officer does not have to pull out a meter. If they cannot see into the front cabin, or you cannot see out, you are in the statute. Rear side glass and the rear window are not named in 73(3). Darker film there is common. Night rain is still on you.
The inspection standard — 2017 and newer
The percentage lives in the Ministry of Transportation’s Passenger / Light-Duty Vehicle Inspection Standard, used for a Safety Standards Certificate under Regulation 611 — used-vehicle sale, out-of-province plating, that kind of inspection. It is not written as a roadside meter law.
For vehicles manufactured on or after January 1, 2017:
- No aftermarket tint on the windshield
- Windows directly left and right of the driver must allow at least 70% light transmittance (factory glass plus film, combined)
- A factory windshield shade band, if present, is limited — the standard rejects tinting that extends more than 75 mm from the top of the windshield or beyond the AS line
Pre-2017 vehicles are not held to that 70% inspection figure. They still have to satisfy section 73 on the road.
What we will and will not do
We will not put aftermarket film on a 2017-or-newer windshield. Front doors on those vehicles get film that still clears 70% with the glass, or we leave them alone. Rear glass is a conversation about night driving, not a loophole. If you need it for a safety, say so before we cut.
This is shop practice, not legal advice. The Act and the standard win every argument.