Understanding Impaired Driving Laws in Ontario: What You Need to Know

Impaired driving is one of the most serious criminal and traffic law concerns in Ontario. The law targets anyone operating a motor vehicle while their ability to drive is compromised by alcohol or drugs — whether those drugs are illegal, prescription, or even over-the-counter medications. Because the consequences of impaired driving can be life-altering, it’s vital for all motorists to understand Ontario’s impaired driving laws, how enforcement works, and the penalties they may face if charged.

When Can You Be Charged for Impaired Driving in Ontario?

In Ontario, you can be charged with impaired driving in several circumstances:

• Operating a vehicle while your ability to drive safely is impaired by alcohol, drugs, or a combination.
• Having prohibited levels of alcohol or drugs in your blood.
• Refusing to comply with a lawful demand for a breath test, oral fluid test, or standardized field sobriety test.

The law doesn’t just apply to cars and trucks — it also applies to motorcycles, boats, snowmobiles, and other types of off-road vehicles, like ATVs.

Legal Limits and Thresholds

Ontario’s impaired driving laws combine federal criminal law under the Criminal Code of Canada and provincial administrative penalties under Ontario’s Highway Traffic Act.

When it comes to limits for alcohol:

• Fully licensed drivers: Impaired driving can be charged at a Blood Alcohol Concentration (BAC) of 0.08% or higher — the federally prohibited level. This would be about 4-5 drinks for an average adult man, and 3-4 drinks for an average adult female, consumed roughly over a two-hour period.

Administrative penalties may also apply at lower levels if police detect alcohol or the driver fails a roadside sobriety test.

The following are zero-tolerance groups who must maintain a 0.00% BAC, as any measurable alcohol intake can lead to penalties:

• Novice drivers (G1, G2, M1, M2)
• Drivers under 21
• Commercial vehicle operators

Police Enforcement and Testing

Law enforcement officers have broad powers to detect impaired driving. Through Mandatory Alcohol Screening (MAS), police can demand a roadside breath test from any driver without needing suspicion of drinking first.

Roadside sobriety and drug screening tests can be administered during a traffic stop. Refusal to provide a breath or oral fluid sample can result in charges equivalent to failing a test.

Immediate Administrative Consequences

Before any criminal conviction, Ontario law allows for immediate roadside sanctions if a driver tests in the warn range (0.05–0.079 BAC), fails or refuses a roadside sobriety or drug test, or tests over 0.08% BAC on a roadside screening device.

These sanctions can include:

• Immediate licence suspension: Typically 7–14-days for warning range offences; 90-days for failing/refusing tests or exceeding 0.08% BAC.
• Vehicle impoundment: Often seven days for more serious test failures.
• Monetary penalties: Administrative fines (e.g., generally $550 for failing/refusing).
• Mandatory education or treatment programs.

Criminal Impaired Driving Charges

An impaired driving charge under the Criminal Code is a serious offence with long-lasting consequences. For first offences (BAC ≥ 0.08 or Refusal), the minimum fine is $1,000 (higher fines can apply for elevated BAC levels). There may also be a licence suspension for at least 1 year upon conviction. In addition to these penalties, a criminal charge may result in:

• Ignition interlock device: Mandatory installation for at least one year after licence reinstatement. (This prevents a vehicle from starting unless a breath sample shows the driver is sober.)
• Criminal record: Conviction results in a permanent criminal record, which affects travel, employment, and more.
• Second offence within 10 years: Minimum 30-day jail term; multiple years of interlock and suspension.
• Third offence within 10 years: Jail minimums increase; licence suspensions can be significantly longer — up to a lifetime suspension in some cases, with limited reinstatement criteria.

If impaired driving results in bodily harm or death, the penalties escalate dramatically, potentially including years in prison or life sentences, depending on the severity and circumstances.

New Changes to Impaired Driving Laws

As of January 1, 2026, Ontario has implemented significant changes to its impaired driving laws. These updates aim to improve road safety by instilling harsher penalties for young drivers and lengthening the timeframe for tracking past offences.

The new legislation increases the length of immediate roadside licence suspensions for drivers under 21 or those with a novice licence (G1, G2, M1, M2) caught with any amount of alcohol or drugs in their system.

Offence Number	Previous Suspension	New Suspension (Effective Jan 1, 2026)
First Offence	3 Days	7 Days
Second Offence	7 Days	14 Days

These penalties apply if a driver:

• Violates the zero-tolerance condition.
• Registers a “warn range” blood alcohol concentration (BAC) between 0.05 and 0.079.
• Fails a roadside Standardized Field Sobriety Test.

The look-back period has also been extended. A “look back period” is the window of time that authorities use to determine if a driver is a repeat offender. Starting in 2026, this window has doubled from 5 to 10 years. This means that any alcohol or drug-related driving incident—including administrative penalties, previous suspensions, or mandatory ignition interlock requirements—will remain on your record for a full decade. If you commit an offence today, an earlier incident from nine years ago will now be taken into account, potentially leading to much harsher “repeat offender” penalties.

Practical Tips to Avoid Charges

The best way to avoid the legal, financial, and personal consequences of impaired driving is simple:

• Plan a safe ride home before consuming alcohol or drugs.
• Use a designated driver, public transit, taxi, or ride-sharing service.
• Stay overnight where you are drinking if possible.

Even small amounts of alcohol or drugs can affect your driving — and a single mistake could have ramifications that last for years.

The Effects of Impaired Driving on SABS Claims in Ontario

Impaired driving has a specific, limited impact on Statutory Accident Benefits Schedule (SABS) claims in Ontario. SABS provides no-fault accident benefits (medical/rehabilitation, income replacement, etc.) to anyone injured in a car accident, regardless of fault. However, there are statutory exclusions under section 31 of O. Reg. 34/10 for certain benefits if you are convicted in connection with the accident.

1. If You Were the Impaired Driver (or Occupant in a Vehicle Connected to the Offence) and Are Convicted

A conviction is required for the exclusion to apply permanently (a charge alone does not deny benefits outright—it only holds certain payments in trust until the criminal case is resolved). “Criminal offence” under SABS explicitly includes:

• Operating a vehicle while impaired by alcohol, drugs, or a combination.
• Operating with alcohol/drug concentration exceeding legal limits.
• Failing to comply with a demand for a breath sample, bodily substance, coordination tests, or evaluation (e.g., under Criminal Code sections 320.15 or the former s. 254).

Affected benefits (denied entirely under s. 31(1)(d)–(f) if convicted):

• Income replacement benefits (IRBs).
• Non-earner benefits.
• Benefits under ss. 21–23: lost educational expenses, visitor expenses, and housekeeping/home maintenance expenses.

Benefits that are still available:

• Medical and rehabilitation benefits.
• Attendant care benefits.
• Other standard SABS coverages (e.g., funeral benefits, death benefits in applicable cases).

These core medical/rehab/attendant care benefits are not excluded even if you are convicted of impaired driving.

If you are only charged (not yet convicted), the insurer must hold the income/non-earner/housekeeping-type benefits in trust until the criminal matter is finalized. If you are convicted (or plead to an included offence), the held amounts are returned to the insurer. If acquitted, you receive them.

2. If You Were Injured by an Impaired Driver

Your own SABS claim is unaffected. SABS is no-fault, so you can still receive full eligible benefits (medical/rehab, income replacement, etc.) from the appropriate insurer under the priority rules, regardless of the other driver’s impairment. The at-fault impaired driver’s conviction does not reduce or exclude your SABS entitlements.

You may also have a separate tort claim (lawsuit) against the at-fault impaired driver for pain and suffering, excess economic losses and future care costs. Impairment on their part can strengthen your tort case (higher likelihood of full liability finding), but your SABS claim itself remains independent.

Other Practical Effects on Your Overall Situation

• Tort claim reduction (if you were also impaired): If you sue someone else and you were convicted of impaired driving, a court may reduce your tort damages for contributory negligence.
• Your auto insurance premiums and future coverage: A conviction will dramatically increase your rates (often 100%+ or more) and may force you into high-risk/Facility Association coverage. Collision/comprehensive coverage on your own vehicle is often excluded for damage caused while impaired.
• Plea considerations: If charged, consult both criminal and injury lawyers before pleading. Pleading to a lesser offence may preserve SABS income-related benefits.

Injured by an Impaired Driver in Ontario? Get Legal Help Now

Ontario’s impaired driving laws are among the strictest in Canada, with steep administrative sanctions and severe criminal penalties designed to protect public safety. You should never get behind the wheel if you are under the influence.

If you have unfortunately been involved in a motor vehicle accident due to the actions of an impaired driver, once you are able to, it is important to contact a Toronto car accident lawyer to understand your legal options.

To schedule a free consultation with our personal injury lawyers at Preszler Injury Lawyers, call 1-888-608-2111 or contact us online now.

We’re here to help.