Ontario Window Tint Laws: Limits, Exemptions, and Fines

Ontario window tint laws effectively ban aftermarket film on the windshield, require at least 70 percent visible light transmission on the front side windows of vehicles built on or after January 1, 2017, and place no darkness limit on rear glass. Get it wrong and you face an $85 set fine per offence, a failed safety inspection, or both. The rules sit in Section 73 of the Highway Traffic Act, backed by a numerical threshold in the provincial inspection standard for newer vehicles.¹

Windshield: Almost No Tint Allowed

Aftermarket tint across the main viewing area of the windshield is off the table. The Highway Traffic Act prohibits any non-transparent material or colour coating that obstructs the driver’s view of the road, and any film dark enough to see on a windshield will cross that line.¹ Tinting the windshield is the fastest way to draw a ticket.

The one accepted exception is a narrow strip along the very top of the glass, limited to 75 millimetres (about 3 inches) from the upper edge. On most vehicles, the manufacturer marks an “AS-1” line showing where the treated area ends; the strip should not extend below that line, and it should still be translucent enough that you can see traffic signals and overhead signs through it.

Front Side Windows: The 70 Percent Rule

The windows immediately to the driver’s left and right are governed by two overlapping standards, and which one matters most depends on when your vehicle was built.

Vehicles Built on or After January 1, 2017

For any vehicle manufactured on or after that date, Ontario’s Passenger/Light-Duty Vehicle Inspection Standard requires a minimum 70 percent visible light transmission (VLT) on the windows directly to the left and right of the driver.² At least 70 percent of outside light must pass through the glass and any applied film combined.

That is a demanding threshold. Factory glass alone often transmits around 70 to 75 percent, so adding any noticeable aftermarket film to a post-2017 vehicle will likely push it below the limit. A 70 percent VLT film is nearly clear.

This number lives in the inspection standard rather than in the Highway Traffic Act itself, which matters in practice: your vehicle can fail a safety inspection for falling below 70 percent even if you have not been ticketed at the roadside.

Vehicles Built Before January 1, 2017

Older vehicles are not subject to the 70 percent VLT inspection requirement on front side windows.² The only test that applies is the Highway Traffic Act’s rule that coloured or reflective material must not “substantially obscure” the interior when viewed from outside.¹

That phrase is deliberately subjective. An officer who cannot see the driver’s silhouette through the front side glass will generally treat the tint as substantial enough to write a ticket. With no meter reading required, enforcement on pre-2017 vehicles comes down to an officer’s judgment call.

Rear and Back Windows: No Darkness Limit

Ontario’s tint rules loosen dramatically once you move behind the driver. The “substantially obscures” rule only applies to the windshield and the windows to the direct left or right of the driver’s seat, so rear side windows and the back window fall outside its scope.¹ No provincial VLT percentage applies to rear glass, which means very dark or even near-opaque film is legal on every window behind the front seats.

There is one catch. Section 74 of the Highway Traffic Act requires a clear view of the roadway behind you, but a vehicle is exempt from needing an unobstructed rear window if it has exterior side-view mirrors on both sides, securely mounted to give a reflected view of following traffic.¹ Most modern vehicles satisfy this from the factory. If one of those mirrors is missing or broken, a blacked-out rear window becomes a citation-worthy problem.

Reflective and Mirrored Films

The statute bans “coloured or reflective material” on the windshield and front side windows that substantially obscures the interior. Mirrored films fall squarely into that category. Even if a reflective film technically lets enough light through, reflectivity is treated as a separate disqualifying characteristic on front glass.¹

The statutory ban on reflective material is limited to the windshield and front side windows. Reflective film on rear windows is not expressly prohibited, but a metallic or mirror-finish rear tint that throws hazardous glare can still be addressed under general equipment and safety provisions. Non-reflective smoke or charcoal films are the safest choice on every window.

Medical Exemptions

Ontario allows medical exemptions for drivers who need darker tint for health reasons such as photosensitivity, lupus, or other conditions aggravated by UV exposure. To qualify, you need a written certificate from a licensed medical practitioner explaining the condition and why additional tint is medically necessary. Keep the certificate in the vehicle at all times so it can be presented during a traffic stop. Even with an exemption, the tint must still meet certain light-transmission minimums, so a medical note is not a blanket pass for fully blacked-out front windows.

Fines and Other Consequences

Police across Ontario enforce these rules through roadside stops, and officers typically carry portable tint meters that clip onto the glass and give an instant VLT reading. A reading below the threshold, or a visual assessment that the interior is substantially obscured, is enough to write a ticket on the spot.

The Ontario Courts set fine schedule, updated in January 2026, lists these amounts for Section 73 offences:

Window or windshield obstructed (Section 73(1)): $85
Window or windshield coated, view obstructed (Section 73(2)): $85
Colour coating obscuring interior (Section 73(3)): $85

Those are base set fine amounts.³ What you actually pay is somewhat higher once the victim fine surcharge and court costs are added. Officers may also issue a notice requiring you to remove the non-compliant film and, in some cases, order a safety inspection before the vehicle returns to the road. Ignoring a removal notice and picking up a second ticket for the same tint invites escalating consequences.

The ticket is not the only cost. Illegal tint can cause your vehicle to fail a safety inspection, which matters any time you sell the car, transfer ownership, or are directed to an inspection after a stop. A failed inspection means the vehicle cannot be driven on public roads until the film is corrected and the car passes a re-inspection.

1
Ontario.ca. Highway Traffic Act, R.S.O. 1990, c. H.8
2
Ontario.ca. Passenger / Light-Duty Vehicle Inspection Standard
3
Ontario Courts. Schedule 43 – Highway Traffic Act Set Fines