- You are legally required to comply with a properly demanded roadside breath test in Ontario — there is no free-standing right to refuse.
- Refusing a valid breath demand is itself a criminal offence — failure or refusal to comply — carrying penalties as serious as an actual impaired driving conviction.
- A roadside screening result in the “warn range” (0.05–0.079 BAC) triggers an escalating administrative suspension, now starting at 7 days for a first occurrence as of January 1, 2026.
- A third warn-range occurrence within 5 years brings a 30-day suspension, a 16-hour treatment program, a 6-month ignition interlock requirement, and a $450 administrative penalty.
- Refusing does not avoid the criminal consequences — it simply substitutes one serious charge for another, generally without the tactical benefit some drivers assume it offers.
- A lawyer may still be able to challenge whether the demand itself was lawful — a different question from whether refusing is a good idea in the moment.
The Short Answer
No — not without serious consequence. Once police have a lawful basis to demand a roadside breath sample, you are legally required to provide one. Refusing is itself a criminal offence in Canada, prosecuted with penalties comparable to an actual impaired driving conviction, meaning refusal rarely, if ever, helps a driver avoid the consequences they are trying to escape.
Your Legal Obligation at the Roadside
Under the Criminal Code, a police officer who has reasonable grounds to suspect alcohol or drugs in a driver's body can demand a roadside breath sample using an approved screening device. Once that lawful demand is made, compliance is mandatory.
Refusing Is Itself a Criminal Offence
Refusing to comply with a valid breath demand is prosecuted as its own distinct criminal offence — failure or refusal to comply — and Canadian law treats it as at least as serious as being convicted of impaired driving itself. This includes a mandatory minimum fine, a criminal record, and a licence suspension.
See our dedicated page on failure to provide a breath sample for the specific penalty structure.
Why Some Drivers Think Refusing Helps
The (mistaken) reasoning usually goes: without a breath sample, there is no scientific evidence of blood alcohol concentration, so the Crown has a weaker case. In reality, Parliament closed this loophole decades ago by making refusal its own offence with matching penalties — meaning a driver who refuses does not avoid prosecution, they simply face prosecution for a different charge with comparable consequences.
The “Warn Range” and 2026 Changes
A roadside result showing a blood alcohol concentration between 0.05% and 0.079% — the “warn range” — sits below the criminal “over 80” threshold of 0.08%, but still triggers an escalating set of administrative penalties, separate from a criminal charge.
| Occurrence (Within 5 Years) | Consequences |
|---|---|
| 1st | 7-day administrative licence suspension (as of Jan. 1, 2026) + mandatory remedial education |
| 2nd | Longer suspension, higher fines, mandatory education/treatment, possible ignition interlock |
| 3rd | 30-day suspension, 16-hour treatment program, 6-month ignition interlock, $450 administrative penalty |
The first-occurrence warn range suspension increased from 3 days to 7 days effective January 1, 2026, alongside new mandatory remedial education requirements for first-time administrative alcohol or drug-related violations.
Refusal vs. Failing the Test
| Scenario | Consequence |
|---|---|
| Warn range result (0.05–0.079) | Administrative suspension, escalating by occurrence, no criminal charge |
| "Fail" result (0.08+) or subsequent conviction | Criminal charge, mandatory minimum fine, criminal record, licence suspension |
| Refusing to provide a sample | Criminal charge — treated as seriously as a conviction for impaired driving |
When a Demand Might Not Be Valid
In some cases, a breath demand may later be successfully challenged in court — for example, if the officer lacked a lawful basis to make the demand in the first place, or if proper procedure was not followed. This is a legal argument raised after the fact, with a lawyer's help — not a reason to refuse compliance at the roadside itself.
What to Actually Do at a Roadside Stop
- Comply with a lawful demand for a roadside breath sample
- Remain calm and polite, without volunteering unnecessary information
- Note the details of the stop as best you can for later reference
- Contact a lawyer promptly if charges result, to assess whether the stop or demand itself can be challenged
Common Myths
Myth: “Refusing means they have no evidence against me.”
False. Refusal is its own criminal offence, prosecuted with penalties comparable to a conviction for impaired driving.
Myth: “I have an absolute right to refuse any police request.”
False in this specific context — once police have a lawful basis for a breath demand, compliance is a legal obligation, not optional.
Myth: “A warn range result is basically nothing to worry about.”
Not accurate — even a first warn range result now carries a 7-day suspension and mandatory education, with penalties escalating quickly on repeat occurrences.
Facing a refusal charge, an impaired driving charge, or a warn range suspension? Call our Toronto team at 416-274-2222 for a free, confidential consultation.
Frequently Asked Questions
Not without consequence. Once a police officer has a lawful basis to demand a roadside breath sample, you are legally required to comply. Refusing is itself a criminal offence under the Criminal Code — failure or refusal to comply with a demand — and is treated at least as seriously as failing the test.
You can be charged criminally with failure or refusal to comply with a demand, which carries penalties comparable to an actual impaired driving conviction — including a mandatory minimum fine, a criminal record, and a licence suspension.
No. Refusal is prosecuted as its own criminal offence with penalties in line with a conviction for impaired driving itself. Refusing generally trades one serious criminal charge for another, rather than avoiding one entirely.
The warn range refers to a blood alcohol concentration between 0.05% and 0.079% — above the warn threshold but below the criminal "over 80" limit of 0.08%. A warn range result triggers an administrative licence suspension and other escalating penalties, without resulting in a criminal charge on its own.
As of January 1, 2026, a first warn-range occurrence results in a 7-day administrative licence suspension (increased from the previous 3-day suspension), along with mandatory remedial education requirements that must be completed by a Ministry of Transportation deadline.
Penalties escalate significantly. A second occurrence within 5 years brings a longer suspension, higher fines, and mandatory education or treatment requirements, with an ignition interlock requirement possible. A third occurrence brings a 30-day suspension, a 16-hour treatment program, a 6-month ignition interlock requirement, and a $450 administrative monetary penalty.
Practically speaking, almost never — the criminal consequences of refusal generally match or exceed those of a failed test, without the tactical advantage some people assume. The better path, if you believe the demand itself was unlawful, is to comply and challenge the legality of the stop or demand afterward with a lawyer's help.
For an initial roadside screening demand, the right to counsel is generally limited given the investigative, time-sensitive nature of roadside screening. However, once you are formally arrested and taken for a more formal breath test at the station, your right to counsel applies and should be respected.
Yes, in some circumstances. If the officer did not have a lawful basis to make the demand in the first place, this can potentially be challenged later in court — a separate question from whether refusing in the moment was a good idea.
Generally, yes — a conviction for refusal is treated similarly to an impaired driving conviction for insurance purposes, since both reflect a serious driving-related criminal record.
Comply with the lawful demand. Remain calm, be polite, and avoid volunteering unnecessary information. If you believe the stop or demand was improper, or if charges result, speak with a lawyer as soon as possible — that is the appropriate place to challenge the situation, not by refusing at the roadside.