Legal Alcohol Limit in Ontario for Driving

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Last updated on March 16, 2026

4 minute read

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Impaired Driving Laws in Ontario at a Glance

  • Ontario’s legal blood alcohol limit is 0.08%, but penalties can start at lower levels. If your BAC is between 0.05 and 0.079, you could still get your licence suspended and be fined.
  • Young, new, and commercial drivers must follow a zero-tolerance rule. If you are under 21 or have a G1, G2, M1, or M2 licence, you cannot have any alcohol in your system.
  • If you drive while impaired, you can face serious penalties right away. These include losing your licence, having your vehicle impounded, paying fines, and being required to take education or treatment programs.
  • A DUI conviction can stay on your criminal record forever unless you are granted a record suspension, also known as a pardon.
  • After a DUI, your insurance rates can go up a lot. You might pay up to four times more for car insurance and be considered a high-risk driver.
Impaired Driving What Consequences Do Drivers Face

Impaired Driving in Ontario: An Overview

According to the Ontario Ministry of Transportation, impaired driving means “operating a vehicle while your ability to do so has been compromised by the consumption of alcohol, drugs, or a combination of the two”. Impaired driving laws don’t just cover driving cars, and trucks, but also off-road vehicles, boats, and snowmobiles.

Ontario records some of the lowest numbers of cases of impaired driving in the country, alongside Quebec and Manitoba. However, alcohol-impaired driving remains one of the leading causes of road-related fatalities.

As such, Ontario implements strict impaired driving laws. Those who are caught driving while exceeding the maximum blood alcohol level in Ontario can face:

  • Suspension of one’s license
  • Fines and reinstatement fees
  • Impoundment of one’s vehicle
  • Enrollment into education programs or treatment facilities

The harshness of the penalty is dependent on the driver’s age and license time, as well as the number of substances found in their system. If you are caught or convicted more than once, you can face harsher penalties or even have your license suspended.

What Is the Legal Blood Alcohol Limit in Ontario?

The legal blood alcohol limit for fully licensed drivers in Ontario is 0.08% or 80 mg of alcohol for every 100 ml of blood. Any higher and you can face criminal charges, license suspension, and fines.

However, take note that drivers caught with a blood alcohol concentration (BAC) between 0.05% to 0.08% (called the “warn range”) may also face consequences.

Those whose BAC falls in the warning range (0.05–0.079) may face a 7-day licence suspension for a first occurrence, 14 days for a second, and 30 days for a third occurrence, along with escalating penalties.

What Is the Ontario BAC Limit for Young and New Drivers?

The BAC limit for young and new drivers in Ontario is anything above zero. Ontario has a zero-tolerance policy for drivers aged 21 or under, as well as drivers of any age who hold a G1, G2, M1, or M2 license. In short, young and novice drivers cannot drive with any alcohol in their systems.

If you’re wondering why the rules are so strict for young drivers, consider this: Statistics Canada found that drivers between the ages of 20 and 24 years old recorded the highest rates of impaired driving at 480 incidents for every 100,000 drivers.

What Is the Ontario BAC Limit for Commercial Drivers?

The BAC limit for commercial drivers in Ontario is also anything above zero. This means that anyone operating a commercial vehicle with licence classes such as A, B, C, D, E, or F or Commercial Vehicle Operator’s Registration (CVOR) cannot have any trace of alcohol (or drugs) in the system when operating a commercial vehicle.

Commercial vehicle drivers caught with any drugs or alcohol in their systems could face a three-day immediate roadside license suspension and up to $450 in fines. They will also likely be sent to an education or treatment program. Drivers whose licenses are suspended will also have to shell out money to have them reinstated.

How Many Beers Can You Drink and Drive in Ontario?

The number of beers you can drink without going over the legal limit in Ontario depends on several factors, including how far apart you drink those beers, how much time passes between your last drink and the moment you get in your car, your weight, metabolism, and even your gender.

In general, smaller people have a slower rate of metabolism or the rate at which alcohol is removed from the blood. Women also tend to metabolize alcohol slower than men.

For example, if a 100-pound man and a 100-pound woman consume two beers in an hour, the former could show a BAC of 0.09% while the latter could show a BAC of 0.10%.

What Are the Penalties for Impaired Driving in Ontario?

Here is a list of the penalties that drivers who are caught drinking and driving in Ontario could face:

Offence TypeFirst OffenceSecond OffenceThird Offence
Warn range
(BAC 0.05–0.079) or
failed sobriety test
7-day immediate
licence suspension;
$250 penalty;
8-hour
education course
14-day immediate
licence suspension;
$350 penalty;
16-hour
education course
30-day immediate
licence suspension;
$450 penalty;
16-hour treatment
program;
Ignition interlock
condition for 6 months
BAC ≥0.08 or refusing
alcohol/drug test
Immediate roadside
90-day licence
suspension;
7-day vehicle
impoundment;
$550 penalty;
8-hour education
course
Immediate roadside
90-day licence
suspension;
7-day vehicle
impoundment;
$550 penalty;
16-hour treatment
program
Immediate roadside
90-day licence
suspension;
7-day vehicle
impoundment;
$550 penalty;
16-hour treatment
program;
Ignition interlock
condition for 6 months
Drivers under 21 or
with G1, G2, M1, M2
licence (zero
tolerance)
7-day immediate
roadside
suspension;
$60–$1000 fine if
convicted;
$250 penalty;
8-hour education
course
14-day immediate
roadside
suspension;
$60–$1000 fine if
convicted;
$350 penalty;
16-hour treatment
program
30-day immediate
roadside
suspension;
$60–$1000 fine if
convicted;
$450 penalty;
16-hour treatment
program;
Ignition interlock
condition for 6 months
Commercial vehicle
drivers (zero
tolerance)
3-day immediate
roadside
suspension;
$250 penalty;
8-hour education
course
3-day immediate
roadside
suspension;
$350 penalty;
16-hour treatment
program
3-day immediate
roadside
suspension;
$450 penalty;
16-hour treatment
program;
Ignition interlock
condition for 6 months

How Long Does Impaired Driving Stay on Your Record?

A conviction for impaired driving remains on your criminal record unless you apply for and receive a record suspension (pardon).

Does Impaired Driving Affect Insurance?

Impaired driving can impact your current policy and your ability to get auto insurance in the future. When you’re hit with an impaired driving charge, your insurance provider could either cancel your policy or raise your premium rate significantly.

This is because people who drive under the influence are likely to be repeat offenders. As alcohol and drugs can seriously affect your reaction time and judgment, it raises your risk for careless driving, leading to accidents and injuries to yourself and others.

To learn more about what to do in case of an accident, read our blog on how to report a car accident in Ontario.

When applying for insurance coverage with an impaired driving charge or conviction on your record, you’re likely to be classified as a high-risk driver by insurance providers. This means they’ll charge you much more for insurance than regular drivers. In fact, drivers with impaired driving charges can pay up to four times more on auto insurance premiums than drivers with clean records.

Can You Lower Your Insurance Rates Again After a DUI?

DUI offenders can work towards lowering their premiums even with an impaired driving conviction. Some things they can do to make the transition include:

  • Driving safely and maintaining a clean driving record
  • Paying all their fines on time
  • Completing all the recommended treatment and education programs
  • Completing a course on defensive driving
  • Finding insurers that are more forgiving towards DUI cases
  • Comparing quotes across different providers

Key Advice from MyChoice

  • Avoid driving after consuming any alcohol, especially if you are a young, novice, or commercial driver, since Ontario applies strict zero-tolerance rules.
  • Remember that even if your BAC is in the ‘warn range’ (0.05 to 0.079), you can still lose your license and face penalties that could impact your driving record and insurance.
  • If you plan to drink, arrange a safe way to get home ahead of time. Use a rideshare, taxi, or a designated driver to avoid serious legal and financial trouble.

With over a decade in Canada’s insurance sector, Aren is a leading voice in the industry, providing thought leadership on auto insurance, underwriting innovation, and how technology is reshaping insurance.

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