Winter Tires and Car Insurance in Ontario: The Discount, the Rules and Winter Claims

In Ontario, every auto insurer is required to offer a discount to drivers who install winter tires, and it typically lands around 2% to 5% off your premium. The discount applies for having a full set of winter tires fitted during the winter season, it is not automatic, and you have to tell your insurer or broker to apply it. Below I explain the rule, exactly how to claim the discount, and how winter driving affects your claims so a small saving does not turn into a big loss.

The winter tire discount is mandatory in Ontario

Since 2016, Ontario regulation has required auto insurers to provide a discount to policyholders who use winter tires. That makes Ontario one of the provinces where the saving is a right, not a favour. The exact percentage varies by insurer — commonly in the low single digits — but across a multi-vehicle household it adds up, and it stacks with other discounts you already qualify for. I always check that it is applied when I set up or review an auto policy.

How much is the discount worth?

Most insurers offer somewhere around 5%, though some are lower. On its own that may sound minor, but it is a recurring saving every year you run winter tires, and it is one of the few discounts that also makes you objectively safer on the road. When I compare 12+ insurers for a client, I factor the winter-tire discount into the real, applied price rather than the sticker quote — a company with a slightly higher base rate but a strong winter-tire discount can end up cheaper for you. See more ways to stack savings in my guide on how to lower your car insurance in Ontario.

What actually qualifies

• A full set of four — insurers want winter tires on all four wheels, not two.
• True winter tires — tires marked with the mountain/snowflake symbol, not merely all-season or all-weather tires, unless the insurer specifies otherwise.
• Seasonal installation — generally fitted for the winter months; some insurers ask for installation and removal dates.
• Proof on request — keep your purchase or installation receipt in case the insurer asks for verification.

How to claim the winter tire discount

The discount is not applied automatically, which is why so many drivers miss it. The steps are simple: tell your broker or insurer that you run a full set of winter tires, confirm the dates they are installed, and keep your receipt. If you are a client of mine, this is part of the annual review — I make sure the discount is on your policy and that you are not leaving it on the table. If you are shopping, it is one of the first things to confirm; my guide on comparing car insurance quotes walks through what to verify on each quote.

Winter tires are about safety first

The discount exists because winter tires genuinely reduce risk. Below about seven degrees Celsius, the rubber in all-season tires hardens and loses grip, while winter-tire compounds stay pliable and bite into snow and ice. Shorter stopping distances and better control mean fewer collisions — and fewer collisions mean fewer claims, a cleaner record, and a lower premium over time. In that sense the real saving from winter tires is far larger than the discount itself.

Winter driving tips that protect your record

• Slow down and increase following distance — most winter collisions come from carrying summer speeds onto winter roads.
• Clear all snow and ice — off the roof, lights, mirrors and every window before you drive.
• Keep an emergency kit — blanket, scraper, booster cables, a charged phone and a small shovel.
• Avoid cruise control on slick roads — you want full control over acceleration and braking.
• Watch for black ice — on bridges, ramps and shaded stretches that freeze first.

All-season and all-weather tires are not the same thing

This trips up a lot of drivers. All-season tires, despite the name, are not winter tires and generally do not qualify for the discount. All-weather tires are a middle category: those carrying the mountain/snowflake symbol are rated for winter use and may qualify, but you should confirm with your insurer rather than assume. If you are buying new tires specifically to earn the discount and improve safety, look for the three-peak mountain/snowflake marking, buy a full set of four, and keep the receipt. When in doubt, ask me before you buy so you are not disappointed at renewal.

Winter is peak season for claims

Ontario winters produce a surge in auto claims — fender-benders on icy ramps, cars sliding at intersections, and weather damage from storms and falling ice. That matters for two reasons. First, it reinforces why insurers reward winter tires: they want fewer of these claims. Second, it means your coverage choices are tested most in the months ahead, so this is the worst time to be under-insured or to discover a coverage gap. A quick pre-winter review is cheap insurance against an expensive surprise.

How winter claims work

If you are in a collision, your winter tires do not change how a claim is handled, but your choices at the scene do. A single-vehicle slide into a curb or another car is typically a collision claim and may be considered at-fault, which can affect your premium. Comprehensive coverage handles non-collision winter events such as damage from falling ice or a storm. Knowing which coverage applies, and whether a claim is worth filing against your deductible, matters most in winter when minor incidents are common. My step-by-step post on what to do after a car accident in Ontario covers exactly what to document at the scene.

Review your auto policy before the first snow

Fall is the ideal time to review your coverage: confirm the winter-tire discount is applied, check that you carry the collision and comprehensive coverage you want for winter risks, and compare the market if your renewal rose. As an independent broker I compare 12+ of Canada's top-rated insurers, apply every discount you qualify for, and keep your protection matched to how you actually drive. If budget is your priority, start with cheap car insurance in Ontario, and see city pricing on my Toronto auto insurance page.

I am Suneet Sharma, an independent broker licensed as a R.I.B. (Ontario), based in downtown Toronto. I make sure the winter-tire discount and every other saving is applied to your policy, explain your winter coverage in plain language, and stay your single point of contact at renewal and at claim time. Learn more about my personal auto insurance service any time.