Are Windshield Decals Illegal?
Short answer: on the front windshield, yes — opaque stickers are restricted. But there are legal alternatives for every surface of your vehicle.
Ontario's Highway Traffic Act requires front glass to maintain at least 70% visible light transmittance. Clear vinyl, rear window graphics, and door decals are all fully legal — and often better for visibility anyway.
What Ontario Law Actually Says
Ontario Regulation 596 (Vehicle Equipment), Section 7, under the Highway Traffic Act requires that the front windshield and all windows in the front seating compartment maintain a minimum visible light transmittance of 70%. This is the same standard applied to aftermarket window tint.
In practice, an opaque printed vinyl decal — even a small one — reduces that section of glass to near-zero transmittance. A sticker that would be unremarkable on a door panel becomes a compliance issue when placed on the windshield. Officers and safety inspectors can issue a defect notice requiring removal before the vehicle can operate.
The good news: this restriction applies only to the front windshield and front side windows. Rear glass, rear side windows, doors, bumpers, and body panels are not subject to transmittance rules — giving you plenty of legal surface area for vehicle graphics.
Legal vs. Restricted: Vehicle Decal Options
Where you place your decal matters as much as what it says. Here is the legal breakdown for each vehicle surface in Ontario.
Opaque Front Windshield Decal
Any solid, opaque sticker applied to the front windshield is prohibited under Ontario HTA O. Reg. 596, s.7. Front glass must maintain at least 70% visible light transmittance — a typical printed vinyl decal fails this test.
Clear Vinyl Window Sticker
Transparent-background vinyl — only the printed design is visible. Minimal impact on light transmittance. Legal on front side windows and rear glass. Most popular choice for business logos and QR codes on vehicle glass.
Shop window stickers →Rear Window & Side Window Decals
Decals on rear glass and rear side windows face no 70% transmittance rule. A solid corner sticker or full rear-window graphic is legal provided the driver retains adequate rearview through mirrors. Perforated vinyl allows full-coverage at full legality.
Shop rear window decals →Front Side Window — Partial
A small decal in the lower corner of a front side window — well outside the driver's direct sightline — is unlikely to be cited. However, front side windows are subject to the same 70% transmittance standard as the windshield. Keep graphics small and to the corners.
Shop car decals →Legal Window & Vehicle Decals — Shop Now
All products below are legal for Canadian vehicle use. Printed in Ontario, ships across Canada and the United States.
Clear Window Decals | Custom See-Through Vinyl, 2 to 12 Inch
Truck Window Decals | Custom Vehicle Window Decals 8 to 30 In
Custom Car Decals Canada, Cut to Shape, 3 to 8 Inch
The Quick Rules — At a Glance
- ✓Front windshield: opaque decals are NOT permitted — 70% transmittance rule.
- ✓Rear window: decals and full-coverage perforated vinyl are legal.
- ✓Front side windows: small corner decals accepted; solid graphics are risk.
- ✓Clear vinyl stickers on glass: minimal light impact — legal on most surfaces.
- ✓Required regulatory stickers on windshield (safety, insurance) are lawful.
- ✓Best advertising placement: doors, rear window, bumpers — not the windshield.
Frequently Asked Questions
Frequently asked questions
Are windshield stickers illegal in Ontario?‹
Opaque, solid windshield stickers are restricted in Ontario. O. Reg. 596 under the Highway Traffic Act requires that the front windshield maintain at least 70% visible light transmittance — a printed vinyl decal typically drops below that threshold. Small regulatory stickers (safety certificates, insurance cards) affixed to designated corners are permitted because they are required by law and minimally intrude on the sightline.
Can I put a small sticker on my windshield in Canada?‹
Legally required stickers — such as provincial safety certificates, Drive Clean stickers, and insurance evidence markers — may be placed on the windshield in the locations your province specifies. Decorative or advertising stickers on the front windshield are generally prohibited because they reduce light transmittance. If you want a logo or QR code on your vehicle glass, place it on the rear window, rear side windows, or use clear vinyl on front side windows.
What is the legal transmittance rule for Ontario windshields?‹
Ontario Regulation 596 (Vehicle Equipment), s.7 requires that the front windshield and all windows in the front seating area maintain visible light transmittance of no less than 70%. This is the same standard that governs tinted windows. A solid printed decal — even a small one — can bring a section of glass below 70% and create a defect notice during a vehicle safety inspection or roadside check.
Where can I legally put decals on my car for advertising?‹
The safest surfaces for business advertising decals are the door panels, rear window, rear side windows, bumper, hood, and roof. Clear vinyl stickers on front side windows in the lower corners are generally accepted. The front windshield is the one surface to avoid for any promotional or decorative sticker in Ontario.
Are perforated vinyl windshield decals legal in Canada?‹
Perforated vinyl is not typically used on front windshields because provincial regulations target light transmittance, not vision through perforations specifically. The safest and most common application of perforated vinyl for vehicle graphics is the rear window — where the 70% transmittance rule does not apply, and the driver sees through the perforations from inside the cabin.