No. You can legally drive an Ontario winter on all-season tires. The province does make insurers reward you for switching.
No law in Ontario makes you put winter tires on your car. Quebec requires them from December 1 to March 15, which is where a lot of the confusion comes from. What Ontario does have is an insurance rule: since January 1, 2016, every auto insurer in the province has had to offer a discount to drivers who run winter tires.
There's no fine for running all-seasons in January, and no inspection checks for winter tires.
Legal and safe are separate questions.
Your tires do have to be in safe shape. Tread depth is part of Ontario's safety inspection, and a badly worn tire can fail it. Our guide to the signs you need new tires covers how to check yours.
The rule took effect on January 1, 2016. Every insurer in Ontario has to offer a discount to drivers who put winter tires on, usually up to about 5 percent. Each company sets its own amount and its own conditions, and most ask for two things:
Some insurers also want a receipt or a photo. Ask what the discount works out to in dollars. On a $2,000 premium, 5 percent is $100 a year, which is more than an on-rim swap costs.
Quebec requires tires with the three-peak mountain snowflake symbol from December 1 to March 15 on vehicles registered in Quebec. Fines run $200 to $300 plus costs. British Columbia requires winter-rated tires on many of its highways through the colder months.
Driving to Montreal for the holidays on Ontario plates? The Quebec rule is written for Quebec-registered vehicles. The ice on the 401 doesn't check plates, though.
Ontario only allows studded tires on vehicles registered in Northern Ontario, in districts like Sudbury and Thunder Bay, plus out-of-province visitors staying less than a month. A car registered in Brantford can't legally run them.
All-season rubber hardens as the temperature falls, and the usual rule of thumb in Canada is 7°C. Winter tires use a softer compound that keeps gripping well below that.
The Tire and Rubber Association of Canada, citing research from the Traffic Injury Research Foundation, says stopping distances on winter tires can be up to 30 percent shorter than on all-seasons just below freezing. It also says a winter tire at -30°C grips ice and snow better than an all-season does at 4°C.
Around Brantford, daytime highs settle below 7°C sometime between late October and mid-November. That's your window, law or no law. The winter tire timing guide covers reading the forecast, and our tire type comparison covers all-weathers if you'd rather skip the changeover.
Call your insurer this week and ask two things: whether your tires qualify for the discount, and what it's worth in dollars. Then book your changeover for late October.
Last updated: September 2026
No. Ontario has no law requiring winter tires on passenger vehicles. Your tires do have to be in safe condition, and tread depth is part of the provincial safety inspection.
Yes. Since January 1, 2016, every Ontario insurer has had to offer one. It's usually up to about 5 percent, and most insurers want all four tires marked with the three-peak mountain snowflake symbol.
Quebec requires them on vehicles registered there from December 1 to March 15. British Columbia requires winter-rated tires on many highways during the colder months. Ontario has no requirement.
No. Ontario allows studded tires only on vehicles registered in Northern Ontario, plus out-of-province visitors staying less than a month.
Book your changeover before the first snow and pick the day yourself.
Book now