Refusing to provide a breath sample is its own criminal offence in Canada, and on a first conviction it carries a higher minimum fine than blowing over the legal limit. Section 320.15(1) of the Criminal Code makes it an offence to fail or refuse to comply with a breath demand, knowing the demand was made, without a reasonable excuse. The minimum fine is $2,000, against $1,000 for most over-80 convictions — the law is built that way on purpose, so that saying no is never the cheaper option.

You hear the siren. The officer approaches and says: “I’m demanding you provide a sample of your breath into an approved screening device.” In that moment, you have a choice: blow or refuse. Many people think refusing is the safer move. Under Canadian law, that assumption is often wrong.

If you’ve been stopped by police in the GTA and asked for a roadside breath sample, what you do next matters. Refusing a breathalyzer in Ontario is a separate criminal offence — one with penalties that can exceed those for “over 80”. Your licence is already suspended: a failure or refusal triggers an immediate 90-day administrative suspension and a seven-day vehicle impoundment before any finding of guilt. Below, the Toronto criminal defence lawyers at Daniel Brown Law explain what the charge is, how it is proven, where the real defences are, and what a conviction costs. For a confidential consultation, call Daniel Brown Law at (416) 297-7200.

The charge
Criminal Code s. 320.15(1)Failure or refusal to comply with a demand
Minimum fine
$2,000First offence, s. 320.19(4) — the highest minimum of any drinking and driving charge
Driving prohibition
1 to 3 yearsMandatory on a first conviction, s. 320.24(2), plus Ontario’s own suspension
Maximum
10 years14 years if the refusal follows an accident causing bodily harm; life if a death

What does the Crown have to prove on a refuse breath sample charge?

Read section 320.15(1) slowly and the whole case is in it: “Everyone commits an offence who, knowing that a demand has been made, fails or refuses to comply, without reasonable excuse, with a demand made under section 320.27 or 320.28.” Four things, and the Crown has to prove all of them beyond a reasonable doubt.

1. A lawful demandA peace officer made a demand under section 320.27 (roadside screening) or section 320.28 (breath or blood at the station). If the officer was not entitled to make that demand, there was nothing you were obliged to obey.Was the officer allowed to ask?
2. You knew it had been madeThe section opens with the words “knowing that a demand has been made”. A demand that was never communicated to you, or that you could not understand, is not one you knew about.Was the demand actually conveyed?
3. You failed or refusedAn outright refusal is one route. A “failure” is the other — and a failure has to be intentional. Someone who genuinely cannot produce a suitable sample has not failed to comply within the meaning of the section.Was the failure deliberate?
4. No reasonable excuseThe words “without reasonable excuse” are part of the offence. Where an excuse is raised with an air of reality, it has to be answered before there can be a conviction.Is there an excuse the law recognises?

Notice what is not on that list: your blood alcohol concentration, your driving pattern, how many drinks you had, or whether you were impaired at all. When you refuse a breath demand, the Crown doesn’t have to prove you were drunk. The charge is about disobeying a lawful order from a peace officer. The trial won’t focus on your sobriety, your driving pattern, or how many drinks you had. The central question is whether a valid demand was made and whether you failed to comply. Your level of intoxication is secondary.

Key considerations

Saying no is usually the worse option

For a first-time offender, the minimum fine for refusing a breath demand is higher than the minimum fine for blowing over the legal limit — unless your BAC is exceptionally high. This is not a drafting oversight. The law is designed this way deliberately, to remove any financial incentive to refuse. Refusal also triggers automatic licence suspensions and other consequences similar to impaired-driving offences.

A refusal cannot be undone

Once you clearly refuse — “I’m not blowing” — the offence is complete. Changing your mind minutes later almost never undoes it. Whether a refusal was unequivocal is a factual question for the trial judge, but a clear verbal refusal consistently counts.

Your roadside words are the evidence

For impaired driving charges, what you say before being advised of your rights is often difficult for the Crown to use. Refusal cases are different. The words “I refuse” are the act that completes the offence. They are typically admissible to prove the charge. Section 320.31(9) also makes a statement admissible to justify the demand itself, including one you were compelled to make under a provincial law.

Refusing does not make an impaired charge go away

A refusal means there is no reading, so over 80 and refusal are alternatives to each other. Impaired driving can still be prosecuted on the officer’s observations alone — and under section 320.31(10) the Crown may put the refusal itself before the court in an impaired driving trial, where the judge may draw an inference against you from it.

What happens at the roadside, and what the officer is allowed to ask

There are two different breath demands in the Criminal Code, they are made at different points, and they are governed by different rules. Almost every refusal case turns on which one was made and whether the officer was entitled to make it.

The demand What the officer needs first How quickly you must comply
Roadside screening on suspicions. 320.27(1)(b) Reasonable grounds to suspect that you have alcohol or a drug in your body and that you operated a conveyance within the preceding three hours ImmediatelyInto an approved screening device, and you must accompany the officer for that purpose
Mandatory alcohol screenings. 320.27(2) No suspicion at all. The officer only has to have an approved screening device in their possession and to be acting in the lawful exercise of a power — an ordinary traffic stop is enough ImmediatelyThis is the provision that surprises people most: since December 2018 no grounds are needed to ask a driver to blow
Physical coordination testss. 320.27(1)(a) The same reasonable suspicion. Refusing the tests is a refusal under s. 320.15(1) just as refusing to blow is ImmediatelyThe tests are prescribed by regulation
Breath or blood at the stations. 320.28(1) Reasonable grounds to believe that you operated while impaired to any degree, or that you were over 80. A higher standard than suspicion, and a real one As soon as practicableInto an approved instrument operated by a qualified technician — or blood, where your physical condition makes breath impracticable
Drug evaluation or bloods. 320.28(2) Reasonable grounds to believe impairment by a drug, or by a combination of alcohol and a drug As soon as practicableAn evaluation by a trained evaluating officer, and/or a blood sample

Two points that are widely misunderstood. First, mandatory alcohol screening under section 320.27(2) needs no suspicion of any kind — an officer with an approved screening device at hand, stopping you lawfully for any reason, can require you to blow. Second, the roadside demand says “immediately”, while the station demand says “as soon as practicable”. That difference is not stylistic. In R. v. Breault (2023) the Supreme Court of Canada held that the validity of a screening demand requires the officer to have immediate access to an approved screening device: a person cannot be criminally liable for refusing to comply with a demand it was not actually possible to comply with. Where the device had to be radioed for, the demand itself may be invalid.

Defences to a refuse breath sample charge

Because the charge is about lawful compulsion rather than intoxication, the defences attack different things: the demand, the failure, or the excuse. What follows is grouped by what each one actually answers. An officer’s mistake can be your best defence.

A retro technical-manual illustration of a two-column glass tube apparatus in a stand, one graduated scale marked in burnt orange

Attacking the demand

There were no grounds for the demand

Attacks: element 1, a lawful demand

In defending an allegation of failing or refusing to provide a breath sample, a lawyer must first assess whether the police officer made a lawful demand for the breath sample. If the police officer did not have a good enough reason to request the breath sample, the accused person would be entitled to refuse to provide a sample of his or her breath to the officer. Whether the officer had a good enough reason is a fact-specific analysis; each case is different, and a lawyer needs to look at all the facts surrounding the demand before concluding whether the officer was entitled to request the sample.

The screening device was not at hand

Attacks: element 1, a lawful demand

A roadside demand requires you to provide the sample immediately. Where the officer did not have an approved screening device with them and had to send for one, the Supreme Court of Canada has held that the demand is not valid, because you cannot be convicted of refusing a demand with which compliance was never actually possible.

The wrong demand, or the wrong standard

Attacks: element 1, a lawful demand

A station demand under section 320.28 requires reasonable grounds to believe you were impaired or over 80 — not the lower suspicion standard that supports a roadside screening test. Grounds that would have justified an approved screening device demand do not necessarily justify a demand for breath tests on the approved instrument.

Timing and other procedural defects

Attacks: element 1, a lawful demand

If any of the preconditions were not met — no objective grounds, improper timing, the three-hour window in section 320.27(1), or other procedural defects — the demand may be invalid, and the charge can fail. These defects can often be raised directly at trial without a separate Charter application.

Attacking the failure itself

The failure was unintentional

Attacks: element 3, a deliberate failure

A person may unintentionally fail to provide a breath sample for a number of reasons. If a person unintentionally failed to provide a sample, they are not guilty of the offence, because the charge requires a refusal or an intention to fail to provide the sample. Where the Crown alleges a failure rather than an outright refusal, that distinction is often the whole case.

The machine was not working properly

Attacks: element 3, a deliberate failure

The machine receiving the sample of the driver’s breath may not have been operating properly, or there may have been an obstruction in the mouthpiece receiving the sample that made providing a suitable sample impossible. If the suspected person is taken to a machine that is not able to give an accurate reading, there is no reason for administering the test at all — and if the police insist, that is itself a reasonable excuse for refusing.

You did not understand the instructions

Attacks: elements 2 and 3, knowledge and intention

An unintentional failure may arise from a lack of comprehension of the instructions given by the police officer. That may be because of the level of intoxication of the person being asked to provide the sample, or because of a language barrier between the officer and the accused. If the person did not understand the instructions given to them about providing a sample, they cannot be found guilty of the offence.

A medical inability, not a refusal

Attacks: element 3, a deliberate failure

A medical condition may prevent a person from providing a suitable sample to the police officer — asthma or emphysema, for example, or an injury to the chest or face. Failing to provide a breath sample is only an offence if you meant to fail. This is also the defence most often claimed and least often proved: see what a reasonable excuse actually requires, below.

Charter applications and the rest of the file

Arbitrary detention and unlawful stops

Attacks: the whole investigation

Mandatory alcohol screening is only available where the officer is acting in the lawful exercise of a power. A stop that was not lawful, a detention that went beyond what the law allows, or a roadside investigation that continued long past the point of a screening test can all found a Charter application.

The right to counsel at the station

Attacks: the station demand

There is no right to speak to a lawyer before a roadside screening test. There is one on arrest, before the breath tests at the station. Being denied the right to consult with counsel in private before providing those samples has been held to be a reasonable excuse, and a breach of section 10(b) can also support an application to exclude evidence.

Evidence integrity

Attacks: proof of what happened

Officer notes, in-car and booking-hall video, the screening device record, the radio log and the timing of each step are all disclosable. What the officer says they said, and what you are said to have said back, can be tested against them. Disclosure gaps and officer memory are a live issue in most refusal trials.

Negotiation and resolution

Attacks: the outcome, not the elements

Not every case is won at trial. Where the facts allow, a resolution can mean a withdrawal, a plea to a different or lesser charge such as careless driving under Ontario’s Highway Traffic Act, or reduced penalties. The material that supports that has to be put in front of the Crown early.

Timing runs through all of it. How long before the screening test, whether the device was there, how long before you reached a lawyer, how long before the breath tests. Read more about impaired driving and over 80 charges, or about what happens when police allege you were in care and control of a vehicle without driving it.

What counts as a “reasonable excuse”?

If an accused person intentionally refused or failed to provide a breath sample, they will be found guilty unless they can establish a reasonable excuse for failing or refusing the demand. Determining whether an excuse is reasonable is always fact specific: what is held reasonable in one case may not be in another. A genuine reasonable excuse is a defence — but courts set the bar high, and the burden is on you to prove it on a balance of probabilities.

Excuses that have been accepted

Medical grounds

Accepted where it is proved

This would involve either a danger to the health of the accused from the performance of the test, or the accused’s required attendance for medical treatment during the time period when the police officer wishes to have the test performed. A real excuse involves an actual, documented inability to provide a sample at that moment — for example, a serious medical condition, backed by medical evidence. Simply claiming a medical issue is not enough.

Mental grounds

Accepted, but rarely

This would cover the situation in which the accused was so drunk or affected by drugs that he was unable to understand the nature of the demand or the effect of his refusal. Note how narrow that is: it is not a defence that you were drunk, it is a defence that you were incapable of understanding what was being asked of you.

Denial of the right to counsel

Accepted at the station

Denial of the right to consult with counsel in private prior to providing the breath sample. This applies to the evidentiary tests after arrest — not to the roadside screening demand, where there is no right to call a lawyer first.

Unreasonable inconvenience

Accepted in the right circumstances

This would cover the situation where the suspected person had to be taken a very long distance for the performance of the test, or where it is unlikely that the test could be validly performed within the time limitations prescribed by law.

No grounds for the demand

Strictly, an answer to the demand

Unless the police officer has grounds for the demand, there is no requirement for the suspected person to take the test. For a roadside screening demand on suspicion that means reasonable grounds to suspect alcohol or a drug in your body; for the tests at the station it means reasonable grounds to believe you were impaired or over 80. Under mandatory alcohol screening, no grounds are needed at all.

The breathalyzer was not working

Accepted where the machine cannot give a reading

If the suspected person is taken to a machine for the test and that machine is not able to give an accurate reading of the amount of alcohol in the blood of the accused, there would exist no reason for administering the test, and if the police should insist, the suspected person would have a reasonable excuse for refusing.

Excuses that typically fail

“I was too drunk to comply”

Fails

Being intoxicated is not an excuse for refusing a demand made because you appeared to be intoxicated. The narrow exception is where the level of intoxication was such that you could not understand the demand at all, which is a much harder thing to establish than it sounds.

“I thought I could speak to a lawyer first”

Fails at the roadside

Generally there is no right to call a lawyer before a roadside screening test. The right to counsel typically arises upon arrest or detention for further testing, not for the initial approved screening device demand. A mistaken belief that you were entitled to call first is not a reasonable excuse.

“My lawyer told me not to blow”

Fails

Advice to refuse does not make a refusal lawful, and it does not become a reasonable excuse because it came from a lawyer. No properly advised person is told to refuse a breath demand.

“I changed my mind afterwards”

Fails

Once a refusal is unequivocal, the offence is complete. Changing your mind moments later rarely changes the result. Whether the refusal was unequivocal in the first place is still a question for the trial judge.

What is the penalty for refusing a breath sample in Canada?

Parliament sets the minimums, and a judge cannot go below them. On a first offence the minimum fine depends on the charge and the reading — and a refusal carries the highest minimum fine of all.

Charge or reading on a first offence Minimum fine
Refusing to provide a breath samples. 320.19(4) $2,000
80 to 119 mg of alcohol in 100 mL of bloods. 320.19(1) $1,000
120 to 159 mgs. 320.19(3)(a) $1,500
160 mg or mores. 320.19(3)(b) $2,000

For a first-time offender, the minimum fine for refusing a breath demand is higher than the minimum fine for blowing over the legal limit — unless your BAC is exceptionally high. That is deliberate: the refusal minimum was set at the top of the over-80 range so that refusing is never the cheaper choice.

Maximums, repeat offences and the driving prohibition

Conviction Minimum punishment Maximum, and the driving prohibition
First refusalss. 320.15(1), 320.19(1) and (4) A fine of $2,000 10 yearsOn indictment. On summary conviction, a $5,000 fine or two years less a day, or both. Mandatory prohibition of 1 to 3 years
Second refusal or drinking and driving offences. 320.19(1)(a)(ii) 30 days imprisonment 10 yearsMandatory prohibition of 2 to 10 years
Third or subsequents. 320.19(1)(a)(iii) 120 days imprisonment 10 yearsMandatory prohibition of 3 years or more
Refusal after an accident causing bodily harmss. 320.15(2), 320.2 A fine of $1,000 on a first offence 14 yearsOn indictment. A prohibition of up to 10 years is discretionary, not mandatory
Refusal after an accident causing deathss. 320.15(3), 320.21 A fine of $1,000 on a first offence LifeIndictment only. A prohibition of any length the court considers appropriate

Three things that follow from the table. First, a finding of guilt for refusing a breath sample automatically results in a permanent criminal record for a first-time offender, because a discharge under section 730 is not available where the offence carries a minimum punishment. Second, the driving prohibition under section 320.24 is on top of anything Ontario does to your licence, and it runs for the full custodial term as well. Third, the 2026 safety valve in section 718.4 — which requires a court to go below a minimum where it would amount to cruel and unusual punishment for that offender — applies to minimum terms of imprisonment, so it does not reach the $2,000 minimum fine on a first refusal.

There is one route around the minimum. Under section 320.23, with the consent of the prosecutor and the offender, a court may delay sentencing to allow the offender to attend a treatment programme approved by the province, and if the programme is completed successfully the court is not required to impose the minimum punishment or to make a prohibition order. It still cannot grant a discharge. Whether that route is open depends on the province having an approved programme and on the Crown agreeing, so it is a question to raise with a lawyer rather than to assume.

Section 320.22 also lists factors a sentencing court must treat as aggravating on these offences: bodily harm or death to more than one person, street racing, a passenger under 16, being paid to drive, operating a large motor vehicle, and not being permitted to drive at all.

What happens to your licence, and what a conviction costs

Two separate systems are running at once. Ontario suspends your licence at the roadside under the Highway Traffic Act, long before a court decides anything. The Criminal Code deals with the charge. Both have to be managed.

A retro technical-manual illustration of a mechanical stopwatch opened to show its gears, with a burnt-orange sweep hand

Immediate penalties under the Highway Traffic Act

A 90-day licence suspension

From the moment you are asked for your licence

Where an officer is satisfied that you failed or refused a demand under section 320.27 or 320.28, section 48.3 of the Highway Traffic Act requires them to ask you to surrender your licence, and it is suspended for 90 days from the time the request is made — whether or not you hand it over. You have no right to be heard before that happens, and it is not affected by what later happens to the charge.

A seven-day vehicle impoundment

At your cost and risk

Section 48.4 requires the officer to detain the vehicle you were driving and have it impounded for seven days, at the cost and risk of its owner. Early release is available only where the vehicle turns out to have been stolen.

A $550 administrative penalty and an education course

Before any court date

Ontario levies a $550 administrative monetary penalty on a first failure or refusal, and requires an eight-hour education course. A second or third within the relevant period brings a 16-hour treatment programme instead, and on a third an ignition interlock condition for six months.

A $281 reinstatement fee

Every time your licence is suspended

Ontario charges a licence reinstatement fee each time a licence is suspended. It is currently $281, payable online or at a ServiceOntario centre. Earlier versions of this page gave $275; the fee has since gone up.

On a criminal conviction

A permanent criminal record

With no discharge available

A finding of guilt for refusing a breath sample will automatically result in a permanent criminal record for a first-time offender, because the minimum fine rules out a discharge. The conviction is stored in and accessible through the national CPIC database. For individuals without criminal histories, the effect on their livelihood, freedom and future opportunities can be tremendous.

Your licence, for at least a year

Two prohibitions, not one

A conviction carries a mandatory federal driving prohibition of one to three years on a first offence. Ontario adds its own suspension of at least one year, a mandatory education or treatment programme, an ignition interlock device for at least a year, and after the interlock comes off a minimum six-month “P” condition requiring no alcohol and no drugs in your system when you drive. A second conviction within ten years means three years and interlock for three; a third means a lifetime suspension, reducible after ten years, with interlock for six and a mandatory medical evaluation; a fourth is a lifetime suspension with no possibility of reduction.

Mandatory programs

Back on Track, or its equivalent

Ontario requires convicted drivers to complete its remedial measures programme — Back on Track, administered by the Centre for Addiction and Mental Health — or mandatory alcohol counselling, before a licence is reinstated. The programme is at your expense and has to be completed on the ministry’s timetable, not yours.

Insurance

Significantly higher premiums

A drinking and driving conviction usually means insuring through the Facility Association, which covers high-risk drivers at high premiums, and a significant increase in car insurance costs for years. Fines, probation and possible imprisonment are the court’s part of it; the insurance bill is often the larger number.

Travel, immigration and work

Long after the fine is paid

A criminal record can mean being denied entry into the United States or other countries, and problems with immigration, permanent residence and citizenship applications. It can cost you your job, make you ineligible for certain professions, jobs and opportunities, and follow you through every background check. Non-citizens should read our page on the immigration consequences of a criminal charge.

Publicity and stigma

The part nobody warns you about

There is a real risk of the conviction being reported publicly in the media, and of living with the social stigma of a criminal record. Drinking and driving charges also often arrive alongside others, such as dangerous driving or failing to stop or remain at the scene of an accident, each with consequences of its own.

Needless to say, the consequences of being found guilty of failing or refusing to provide a breath sample are significant and long lasting. If you are facing a charge of refusing to provide a breath sample or any other drinking and driving related offence, you should immediately speak with a criminal lawyer to review your case and all available options before making a determination about defending your case or pleading guilty.

How Daniel Brown Law defends refusal charges

Most of these cases turn on details a driver never sees: whether the officer was allowed to demand a sample at all, whether the device was there, how long each step took, and what you were told before you were asked to blow.

A nationally recognized defence firm

What it means for you

Daniel Brown Law is a leading Canadian criminal defence firm, ranked among Canada’s top criminal law boutiques by Canadian Lawyer, listed for criminal defence by The Globe and Mail and by Best Law Firms, and voted Best Law Firm and Best Legal Services by Toronto Star readers. You are retaining a firm with that record behind it rather than a single lawyer, and your case is staffed by whoever on our team is best placed to handle it.

Demand validity audit

What it means for you

We analyse the grounds, the timing, whether an approved screening device was actually in the officer’s possession, and compliance with every statutory precondition in sections 320.27 and 320.28. That is where refusal cases are won, and it is work that has to be done from the disclosure, not from memory.

Evidence integrity review

What it means for you

Officer notes, in-car and booking video, radio logs, the screening device record and disclosure gaps. We know what to ask for and when the answer “that is everything” should not be accepted.

Medical and physical capability

What it means for you

Where appropriate, we obtain expert support for genuine reasonable excuse arguments — respiratory function, an injury, a condition that made a suitable sample impossible on the night. An unsupported assertion of a medical problem will not survive cross-examination; a properly prepared one can end the case.

Charter litigation when warranted

What it means for you

Unlawful detention, delay, or rights violations that may exclude evidence. Charter applications on a refusal charge are argued within the trial itself, which means the whole case has to be prepared as one.

Trial and appeal experience

What it means for you

We run these cases at trial, and we handle criminal appeals, including applications to suspend a driving prohibition while an appeal is heard. We appear in courthouses across Ontario and are available 24 hours a day.

Recognized by the profession and the public

Daniel Brown Law is ranked among Canada’s top criminal law boutiques by Canadian Lawyer, listed by The Globe and Mail and Best Law Firms for criminal defence, and voted Best Legal Services by Toronto Star readers. Five of its lawyers are recognized by Best Lawyers in Canada for criminal defence.

The Globe and Mail Best Law Firms 2026, Criminal Law

Best Law Firms: Criminal Law

The Globe and Mail, 2026

Canadian Lawyer Top Criminal Law Boutique 2026-27

Top Criminal Law Boutique

Canadian Lawyer, 2026–27

Best Law Firms Canada, Criminal Defence Tier 1, 2026

Criminal Defence, Tier 1

Best Law Firms Canada, 2026

Best Lawyers in Canada 2027, Daniel Brown Law

Best Lawyers in Canada

Criminal Defence, 2027

Toronto Star Readers' Choice winner seal

Toronto Star Readers’ Choice

Best Law Firm and Best Legal Services, repeat winner

Chambers Canada 2027, Ranked in Canada, Daniel Brown Law

Crime, Nationwide

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The firm and its lawyers have been repeatedly recognized for excellence in criminal defence:

What happens after you are charged with refusing a breath sample

Get legal advice immediately. The earlier a lawyer sees the disclosure, the more of these steps are still open to you.

Court sketch of a witness in the witness box being handed a document by counsel while the judge looks on
  1. Your licence is gone the same night

    The 90-day suspension and the seven-day impoundment happen at the roadside, before any court date and regardless of what eventually happens to the charge. You will normally be released from the station with a date to attend court.

  2. First appearance and the start of disclosure

    Your first appearance begins the disclosure process rather than completing it. An initial package usually arrives first — the officer’s notes, the synopsis, the screening device record — and further material such as in-car video, radio logs, device maintenance records and the booking hall footage often has to be requested, sometimes more than once. Early strategy and disclosure requests significantly affect outcomes.

  3. Auditing the demand

    We go through the investigation from the first moment of the stop: what grounds the officer had, whether a device was actually in their possession, exactly what words the demand was made in, what you said and when, whether you were told about your right to a lawyer and whether you were given a real chance to use it.

  4. Resolution or trial

    Some cases are resolved without a trial — by withdrawal, a plea to a lesser or different charge, or reduced penalties. Others go to trial, where an invalid demand can be argued directly and any Charter application to exclude evidence is argued as part of the trial itself.

  5. Appeal, if needed

    A conviction or a sentence can be appealed, and a driving prohibition can sometimes be suspended while the appeal is heard.

Where we defend refusal charges

Our lawyers regularly appear in courtrooms across the Greater Toronto Area and the rest of Ontario — serving Toronto, Peel, York, Durham, and across the province from our office in downtown Toronto.

Frequently asked questions about refusing a breath sample in Ontario

The answers from our original articles, corrected to the law as it stands, grouped by topic.

The charge

Is refusing a breathalyzer a criminal offence in Canada?

Yes. Refusing a breathalyzer in Ontario is a separate criminal offence — one with penalties that can exceed those for “over 80”. In Canada, it is a criminal offence to intentionally fail or refuse to comply with a demand to provide a police officer with a breath sample for the purpose of assessing the concentration of alcohol in the body of the driver of a motor vehicle. The offence is section 320.15(1) of the Criminal Code, and it carries the same maximum penalties as impaired driving and over 80.

Can you refuse a breathalyzer in Ontario?

You can physically decline, but doing so is itself a crime. A police officer who reasonably suspects you have alcohol in your body can demand a breath sample into an approved screening device, and since December 2018 an officer who simply has an approved screening device with them can demand one during any lawful stop, with no suspicion at all. Refusing that demand triggers a separate criminal charge with its own rules, penalties, and defences — plus an immediate 90-day licence suspension and a seven-day vehicle impoundment.

Is refusing a breath sample better than blowing over?

Usually no. Minimum fines for refusal are often higher, and the collateral consequences are just as serious. The minimum fine on a first refusal is $2,000; for over 80 it is $1,000 unless the reading is 120 mg or higher. The driving prohibition, the criminal record, the Ontario suspension, the ignition interlock requirement and the insurance consequences are the same either way.

Am I charged with being impaired, or with something else?

With disobedience. When you refuse a breath demand, the Crown doesn’t have to prove you were drunk. The charge is about disobeying a lawful order from a peace officer. The trial won’t focus on your sobriety, your driving pattern, or how many drinks you had. The central question is whether a valid demand was made and whether you failed to comply. Your level of intoxication is secondary.

A person charged with refusing a breath sample in Toronto, Ontario may also be charged with impaired driving at the same time, because impaired driving can be proved on the officer’s observations without any reading at all.

Does the Crown have to prove I intended to refuse?

Courts debated for years what mental state the Crown needed to establish, and Parliament settled part of it by writing the words “knowing that a demand has been made” into the section itself. So the Crown must prove you knew a demand had been made. Where the allegation is an outright refusal, that plus the refusal is the offence. Where the allegation is a failure — you tried to blow and no suitable sample was produced — the failure has to be intentional. A person who unintentionally fails to provide a sample is not guilty, because the charge requires a refusal or an intention to fail to provide the sample.

At the roadside

Do I have the right to call a lawyer before a roadside ASD test?

Generally no. The right to counsel typically arises upon arrest or detention for further testing — not for the initial approved screening device demand at roadside. That is because the roadside demand requires you to blow immediately. The position is different once you are arrested and taken to the station for breath tests on an approved instrument: there you must be informed of your right to counsel and given a real opportunity to use it, and being denied a private consultation with a lawyer before providing those samples has been held to be a reasonable excuse.

Can police demand a breath sample for no reason at all?

For a roadside screening test, effectively yes. Section 320.27(2) allows mandatory alcohol screening: where a peace officer has an approved screening device in their possession and is acting in the lawful exercise of a power — an ordinary traffic stop will do — they may require the driver of a motor vehicle to provide a sample immediately. No suspicion of alcohol is required. The suspicion-based demand in section 320.27(1) still exists alongside it, and the demand for breath tests at the station under section 320.28 needs the much higher standard of reasonable grounds to believe.

What if the officer did not have a screening device with them?

That can be fatal to the charge. A roadside demand requires you to provide the sample immediately, and in R. v. Breault the Supreme Court of Canada held that the validity of the demand requires the officer to have immediate access to an approved screening device — a person cannot be criminally liable for refusing to comply with a demand it was not actually possible to comply with. Where the officer had to radio for a device, the timing of everything that followed matters.

Is refusing the physical coordination tests also an offence?

Yes. Section 320.27(1)(a) lets an officer with a reasonable suspicion demand that you immediately perform the physical coordination tests prescribed by regulation, and accompany them for that purpose. Failing or refusing that demand is an offence under section 320.15(1) in exactly the same way as refusing to blow. The same is true of refusing a drug evaluation or a blood sample demanded under section 320.28.

Defences and excuses

Can medical issues be a “reasonable excuse”?

Sometimes, but the standard is strict and usually requires medical proof tied specifically to the testing moment. A medical condition that prevented the accused from providing a suitable sample — asthma or emphysema, for example — can mean there was no intentional failure at all. Medical grounds are also recognised as a reasonable excuse where performing the test would endanger the accused’s health, or where they were required to attend for medical treatment during the period when the officer wanted the test performed. Simply claiming a medical issue is not enough.

What other excuses have courts accepted?

Determining whether an excuse is reasonable is always fact specific. What may be seen as reasonable in one case may not be held to be reasonable in another. Examples that have been held reasonable in some cases include: medical grounds; mental grounds, where the accused was so drunk or affected by drugs that he was unable to understand the nature of the demand or the effect of his refusal; denial of the right to consult with counsel in private prior to providing the breath sample; unreasonable inconvenience, such as being taken a very long distance for the test or where the test could not be validly performed within the time limits prescribed by law; the absence of grounds for the demand; and a breathalyzer machine that is not able to give an accurate reading, where the police insist on the test anyway.

Which excuses usually fail?

Courts set the bar high, and the burden is on you to prove the excuse on a balance of probabilities. Excuses that typically fail are “I was too drunk to comply”, “I thought I could speak to a lawyer first at roadside” and “my lawyer told me not to blow”. A real excuse involves an actual, documented inability to provide a sample at that moment.

Can I change my mind after saying no?

Once a refusal is unequivocal, the offence is complete. Changing your mind moments later rarely changes the result. Whether a refusal was unequivocal is a factual question for the trial judge, but a clear verbal refusal consistently counts.

What if I could not understand what the officer was asking?

That is a real defence. An unintentional failure to provide a breath sample can arise from a lack of comprehension of the instructions given by the police officer — because of the level of intoxication of the person being asked, or because of a language barrier between the officer and the accused. If the person did not understand the instructions given to them about providing a sample, they cannot be found guilty of the offence.

Are there defences if the machine was at fault?

Yes. The machine receiving the sample of the driver’s breath may not have been operating properly, or there may have been an obstruction in the mouthpiece receiving the sample that made providing a suitable sample impossible. In either case the failure was not intentional. And if the person is taken to a machine that cannot give an accurate reading of the amount of alcohol in their blood, there is no reason for administering the test at all, so insisting on it gives the person a reasonable excuse for refusing.

Penalties and consequences

What are the immediate consequences of being charged?

A 90-day licence suspension, a seven-day vehicle impoundment, a $550 administrative penalty, an eight-hour education course and a $281 reinstatement fee — all before a court has decided anything. A conviction then brings a permanent criminal record, with potential impacts on employment and travel. Consult a criminal lawyer immediately.

What is the minimum penalty for refusing a breath sample?

A fine of not less than $2,000 on a first offence, under section 320.19(4). A second offence carries a minimum of 30 days imprisonment and a third or subsequent offence 120 days. Every conviction also carries a mandatory driving prohibition — one to three years on a first offence, two to ten on a second, three years or more after that — plus the whole of any custodial term.

Older material, including earlier versions of this page, gives the minimum fine as $1,000 and the suspension as 12 months. The minimum fine for a refusal has been $2,000 since the drinking and driving provisions were rewritten in 2018.

What is the maximum sentence?

Ten years in prison where the Crown proceeds by indictment; on summary conviction, a fine of up to $5,000 or two years less a day, or both. The maximums rise sharply where the refusal follows an accident: 14 years where the person knew, or was reckless as to whether, they were involved in an accident resulting in bodily harm, and life where the accident resulted in death.

Can I get a discharge instead of a conviction?

No. Section 730 of the Criminal Code does not allow an absolute or conditional discharge for an offence for which a minimum punishment is prescribed by law, and a refusal carries a minimum $2,000 fine. A finding of guilt for refusing a breath sample will therefore automatically result in a permanent criminal record for a first-time offender. The only route past the minimum is section 320.23, under which — with the consent of the prosecutor — a court may delay sentencing so the offender can attend a provincially approved treatment programme, and on successful completion need not impose the minimum punishment or the prohibition. Even then, it still cannot direct a discharge.

What are the consequences of being convicted for failing to provide a breath sample?

The consequences of a conviction for refusing a breath sample can include: job loss; fines, probation and possible imprisonment; loss of your driver’s licence; a significant increase in car insurance; problems with immigration, permanent residence and citizenship applications; being deemed ineligible for certain professions, jobs and opportunities; being denied entry into the United States or other countries; living with the social stigma of a criminal record; the risk of the conviction being reported publicly in the media; and a criminal record that will be stored and accessible in the national CPIC database.

For individuals without criminal histories, the effect of a refuse breath sample conviction on their livelihood, freedom and future opportunities in life can be tremendous.

What to do now

What should I do after being charged?

Get legal advice immediately. Early strategy and disclosure requests significantly affect outcomes. Given the consequences of a drinking and driving conviction, it is important to consult with a lawyer in order to identify possible defences to the allegations before making any determination about defending your case or pleading guilty. Call Daniel Brown Law at 416-297-7200.

Will I also be charged with impaired driving or over 80?

Possibly. Impaired driving can be laid alongside a refusal, because it can be proved from the officer’s observations without any breath reading. Over 80 cannot: a refusal means there is no reading to prove, so the two are alternatives to each other. You can read more information about impaired driving and other drinking and driving offences such as driving over 80, or about care and control where police say you were in charge of a vehicle without driving it.

Charged with refusing a breath sample? Talk to a Toronto criminal lawyer now

If you’ve been charged with refusing to provide a breath sample (Criminal Code s. 320.15(1)) anywhere in the GTA, timing matters. Speak with an experienced defence lawyer at Daniel Brown Law to understand your options and protect your record.

Daniel Brown Law has extensive experience defending all types of DUI charges, including refusing to provide a breath sample, impaired driving and driving over 80. Call (416) 297-7200 for a confidential consultation. Our office is in downtown Toronto and we serve Toronto, Peel, York, Durham, and clients across Ontario. We are available 24/7.