Winter Tire Laws in Canada by Province (2026–27)

The rules at a glance

"Required" means a provincial law that can lead to a fine. In every other province, the decision is yours, but police can still charge a driver whose vehicle is unsafe for the conditions, and insurers look at tires after a collision.

Key dates for winter 2026–2027

Quebec: the only province-wide mandate

From December 1 to March 15, every tire on a Quebec-registered car, SUV, light truck or taxi must carry the three-peak mountain and snowflake pictogram (studded tires used within their own rules also count). Tires marked only "M+S" do not qualify. Rental companies in Quebec must fit winter tires whatever province the car is registered in, while private vehicles registered outside Quebec are not covered. The fine is $200 to $300. Full details, exemptions and the 7-day dealer window are on our Quebec winter tire page.

British Columbia: signed highways, October 1 to April 30

BC does not require winter tires everywhere. The rule applies on highways marked with regulatory signs, which covers most of the province outside parts of the Lower Mainland and southeastern Vancouver Island. Passenger vehicles need at least M+S or mountain-snowflake tires with 3.5 mm of tread; commercial vehicles must also carry chains. A driver without proper tires can be turned back and fined $121. On some routes away from mountain passes the requirement ends March 31. See our BC winter tire page for the details.

Ontario: optional, but insurers must give a discount

Ontario has no winter tire law. Instead, the Financial Services Regulatory Authority of Ontario (FSRA) says all auto insurance companies must offer a discount to drivers who install winter tires. The size of the discount and the dates your tires must be on are set by each insurer, so ask yours before you book the swap and keep the invoice.

Studded tires are a different matter. The province allows them on vehicles registered in Northern Ontario. Drivers from Southern Ontario may not use them, although visitors from other provinces may drive through on studs. The Ministry of Transportation describes winter tires as those carrying the three-peak mountain snowflake symbol.

Manitoba: financing through MPI

Manitoba Public Insurance runs a Winter Tire Program that lets individual customers finance winter tires through participating retailers: up to $2,000 per vehicle, repaid over one to four years by monthly withdrawal, at an interest rate MPI sets relative to prime (prime + 2% at the time of writing, subject to change). The vehicle must be a passenger car or light truck registered in your name, with no outstanding MPI payments.

One change matters this year: from October 1, 2026, eligible tires must carry the mountain-snowflake symbol and be marketed only for winter. All-weather and all-season tires no longer qualify for the financing, even if they carry the symbol.

The MPI Driver's Handbook says studded tires are illegal between April 30 and October 1.

Atlantic Canada: studded tire seasons

None of the four Atlantic provinces requires winter tires, but each limits when studs may be used:

• New Brunswick: October 15 to May 1. The province recommends four snow tires rather than two.
• Nova Scotia: October 15 to May 31, under the Studded Tires Regulations made under the Motor Vehicle Act. Fire department vehicles may use them at any time.
• Prince Edward Island: October 1 to May 31. The province advises four matching winter tires from November to April.
• Newfoundland and Labrador: November 1 to April 30 under the Highway Traffic Act. For 2026–27, the province confirmed studs are allowed as of Sunday, November 1, 2026. The spring end date is often extended by announcement: to May 15 in 2025 and 2026, and to May 31 in 2022. Wait for the official notice before leaving studs on past April 30.

Prairies and the North

Alberta does not make winter tires mandatory, and Alberta Transportation says neither the province nor municipalities have legislation specifically prohibiting studded tires or chains. It recommends four winter or all-weather tires. If you drive into BC, the BC rules apply to you on signed highways from October 1.

Saskatchewan has no winter tire requirement. We could not find an official statement from SGI or the province on studded tire dates, so we do not list one here.

In Yukon and the Northwest Territories, the governments recommend winter-rated tires with the mountain-snowflake symbol but do not require them. We found no official rule on studs for the territories or for Nunavut.

Which tires count as winter tires

Transport Canada tells drivers to look for the peaked mountain with snowflake symbol on the sidewall. Tires with it have passed a standard snow traction test. "M+S" (mud and snow) is a manufacturer marking with no snow test behind it: it meets BC's minimum on signed highways but not Quebec's rule or MPI's financing criteria.

• Winter tires carry the symbol and use soft rubber built for cold; they meet every province's definition.
• All-weather tires often carry the symbol too, so they satisfy Quebec and BC, but they no longer qualify for MPI financing.
• All-season tires usually carry only M+S, which is legal in BC but not in Quebec.

Transport Canada consulted in 2024–2025 on tightening the federal winter tire definition so the symbol cannot appear on tires that fail the snow test. Fit all four tires as a matched set: mixing winter and non-winter tires makes the car handle unevenly.

Common mistakes

• Assuming "M+S" is a winter tire everywhere. Quebec requires the mountain-snowflake symbol.
• Driving from Alberta or Ontario into BC in October without checking: BC's rule applies to visitors on signed routes.
• Forgetting to tell your insurer. In Ontario the discount is not automatic; you usually have to ask.
• Keeping studs on too long. Each province has an end date, and the law applies even on a warm, dry day.
• Waiting for the first snowfall. Tire shops book up weeks ahead; many drivers switch when temperatures stay below about 7 °C.