Impaired Driving and Over 80 Lawyers Toronto

Daniel Brown Law defends impaired driving, over 80 and refusing a breath sample charges in Toronto and across Ontario: three separate charges, any of which can come out of a single drinking and driving investigation. Each is proven in a different way, and the minimum fine differs, but all three carry a criminal record and a driving prohibition of at least one year on a first conviction. Most DUI cases in Toronto turn on how the breath evidence was obtained, not on whether you had a drink.
Being charged with “drinking and driving” or DUI (driving under the influence) — impaired driving, driving over 80 or refusing a breath sample — is a criminal matter in Canada governed by the Criminal Code. If you have been charged in Toronto or anywhere in Ontario, your case will move through the Ontario Court of Justice and your licence is already suspended — every drinking and driving charge carries an immediate 90-day administrative suspension, before any finding of guilt. The strongest defences usually live in the breath-demand timing, the approved screening device procedure, Charter breaches at roadside, and the reliability of the breath readings themselves. If you need an impaired driving, over 80 or DUI lawyer, contact Daniel Brown Law at (416) 297-7200 for a confidential consultation.
- The charges
- Criminal Code ss. 320.14–320.15
- Crown must prove
- Impairment or the readingOver 80 needs no proof of impairment
- First conviction
- $1,000 to $2,000 fineDepends on the charge and the reading, plus a 1-year prohibition and a record
- Maximum
- 10 years14 with bodily harm; life if a death
Impaired driving, over 80 and refusing a breath sample: three separate charges
Any of these charges can come out of a drinking and driving investigation, and more than one can be laid at once — impaired driving is often laid alongside either over 80 or a refusal. Over 80 and refusing are alternatives to each other, because a refusal means there is no breath reading to prove. Each is proven in a different way, so each has its own defences.
The Crown must prove your ability to drive was impaired by alcohol or a drug — driving pattern, co-ordination, speech, comprehension. No breath reading is required.
No proof of impairment at all. The Crown only has to prove your blood alcohol concentration exceeded 80mg of alcohol in 100mL of blood, normally through breath readings.
The Crown must prove a lawful demand, a failure to provide the sample, and that you meant to fail. A medical inability to blow is not a refusal.
What they share: a permanent criminal record, a mandatory driving prohibition of at least one year on a first conviction, the same maximum penalties and the same insurance consequences. What differs: the minimum fine — $1,000 for impaired driving, $1,000 to $2,000 for over 80 depending on the reading, and $2,000 for a refusal.
Each of these drinking and driving offences has its own defences. Read more about defending a refuse breath sample charge, or about what happens when police allege you were in care and control of a vehicle without driving it.
Where a Toronto DUI case breaks
Each step from the roadside stop to the breath room has its own legal requirements. Where one is not met, the evidence that follows can be excluded. That does not automatically end the prosecution — an impaired driving charge can still rest on the officer’s observations — but it removes the Crown’s strongest evidence and can leave an over 80 charge with nothing to prove.
Defences to impaired driving, over 80 and refusal charges
These are three different charges, and a defence to one is often no answer to another. What follows is grouped by the charge it actually attacks.

If you are charged with impaired driving
The driving had another explanation
The Crown has to prove your ability to drive was impaired by alcohol or a drug. Weaving, a late brake or a collision can be explained by inattention, a medical episode, an unfamiliar road, weather or a mechanical problem, none of which is a crime.
The observations do not prove impairment
An odour of alcohol, bloodshot eyes or slurred speech show consumption, not that your ability to drive was impaired. A police officer’s opinion on impairment carries no more weight than anyone else’s.
The driving did not happen as described
What the officer says they saw can be tested against their notes, their vantage point, the timing, other witnesses and any dashboard or surveillance video.
Impairment by something else
Fatigue, illness, injury or a prescribed medication taken as directed can produce the same signs the officer relied on.
If you are charged with over 80
A demand that was not authorized
Where the officer relied on a suspicion-based demand, that suspicion has to be real and articulated. Where the officer used mandatory alcohol screening instead, the stop must have been lawful and the device actually in their possession, and the sample must be taken immediately. If the demand was not authorized, the readings that followed it may be excluded.
The accuracy and reliability of the readings
An over 80 charge is only as good as the number. Any error in how the police maintained or operated the breath instrument can undermine the accuracy of the result.
Denial of your right to counsel
If you were not told of your right to a lawyer, or were not given a real chance to call one before providing samples at the station, your breath readings may be excluded.
Timing
The Criminal Code sets out when samples must be taken and how the results are used. Delay between the driving, the demand and the tests can matter a great deal.
If you are charged with refusing a breath sample
A medical inability, not a refusal
Asthma, an injury or another breathing condition can make it impossible to give a proper sample. Failing to provide a breath sample is only an offence if you meant to fail.
No lawful demand, or no intention to refuse
The demand itself must be lawful, and confusion, a language barrier or unclear instructions can mean there was never an intention to refuse at all.
Timing runs through all of it. How long before the screening test, how long before you reached a lawyer, how long before the breath tests. Read 5 surprising truths about impaired driving charges in Toronto, or more about defending a refusal charge.
Penalties for impaired driving and over 80 in Canada
Parliament sets the minimums for every drinking and driving offence. A judge cannot go below them.
| Conviction | Minimum penalty | Driving prohibition |
|---|---|---|
| First offences. 320.19(1); higher minimum fines by reading, and for a refusal | $1,000 fine | 1 to 3 years |
| Second offence | 30 days jail | 2 to 10 years |
| Third or more | 120 days jail | 3 years or more |
| Causing bodily harms. 320.14(2) | Up to 14 years | Up to 10 years |
| Causing deaths. 320.14(3) | Up to life | Any length |
Minimum fines by reading
On a first offence the minimum fine depends on the reading — and a refusal carries the highest minimum fine of all.
| Charge or reading on a first offence | Minimum fine |
|---|---|
| 80 to 119 mg of alcohol in 100mL of blood | $1,000 |
| 120 to 159 mg | $1,500 |
| 160 mg or more | $2,000 |
| Refusing to provide a breath samples. 320.19(4) | $2,000 |
Prosecuted by indictment, impaired driving and over 80 carry a maximum of 10 years; on summary conviction the maximum is a $5,000 fine or two years less a day. The minimums apply regardless of how the Crown elects. Every conviction means a permanent criminal record, and in Ontario a licence suspension of at least 12 months.
What a DUI conviction costs beyond the courtroom
The sentence is only part of it. These are the consequences clients tell us nobody warned them about.
Your insurance
In Ontario you will probably be required to insure with Facility Association, which insures high-risk drivers and charges high premiums. For each of the three years after a conviction it levies a 100 per cent surcharge, and up to 250 per cent for other convictions from the same incident, such as careless driving or failing to remain at the scene.
Your licence and your record
Your licence is suspended for 90 days as soon as you are charged, before any trial. On conviction a minimum fine means a permanent criminal record, and every drinking and driving offence carries a mandatory prohibition of at least one year, though an eligible driver in Ontario can be back on the road in as little as three months through the ignition interlock program.
Related charges
Drinking and driving charges often arrive with others, such as dangerous driving or failing to stop or remain at the scene of an accident.
Travel and work
A criminal record for a DUI can affect border crossings, professional licensing and employment long after the fine is paid.
Why clients bring impaired driving charges to Daniel Brown Law
Most of these cases turn on details a driver never sees. Was the officer allowed to demand a sample in the first place? How long did each step take? Was the breath machine maintained and operated properly? Did you get a real chance to speak to a lawyer before you blew?

Hundreds of these cases
Daniel Brown Law has defended hundreds of impaired driving, over 80 and refusal cases across the Greater Toronto Area, with a focus on Charter applications, breath-demand timing and breath-test reliability.
A nationally recognized defence firm
Daniel Brown Law is ranked among Canada's top criminal law boutiques by Canadian Lawyer, and recognized by The Globe and Mail, Best Law Firms and Toronto Star readers. The firm is regularly called on for commentary on criminal-law matters by The Toronto Star and other major Canadian news outlets.
We know how to challenge the accuracy and reliability of the breath instrument
Any error in how the police maintained or used the breath machine can undermine the accuracy of the readings. Maintenance logs, calibration records, the alcohol standard and the technician’s procedure are all disclosable, and knowing what to demand is often what makes the difference in an over 80 case.
Trial and appeal experience
We frequently defend impaired driving and over 80 cases at trial, and we handle criminal appeals, including applications to suspend a driving prohibition while an appeal is heard.
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.
Best Law Firms: Criminal Law
The Globe and Mail, 2026
Top Criminal Law Boutique
Canadian Lawyer, 2026–27
Criminal Defence, Tier 1
Best Law Firms Canada, 2026
Best Lawyers in Canada
Criminal Defence, 2027 — Daniel Brown, Hilary Dudding, Mark Halfyard, Lindsay Board and Colleen McKeown
Crime, Nationwide
Chambers Canada, 2027
Daniel Brown Law is also named among Toronto's Top Criminal Lawyers by Streets of Toronto and Post City Magazine, and its Best Law Firms 2026 recognition covers both criminal defence and appellate practice.
Our lawyers in the news
Our lawyers are regularly asked by the media to explain impaired driving law and the cases that test it.
Impaired driving cases
Commentary on impaired driving law
- Toronto Star, “Facing a huge COVID-19 backlog, prosecutors are quietly diverting more drug possession and impaired driving charges from criminal court”
- CityNews, “Criminal charges rare for bartenders in drunk driving cases, legal experts say”
- CBC News, “Canadians could now be charged with drunk driving — even if not drunk, lawyers warn”
- Toronto Star, “Lawyer doubts new impaired driving bill will get past constitutional scrutiny”
What happens after a drinking and driving charge
The earlier a lawyer sees the disclosure, the more of these steps are still open to you.
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Your licence is suspended immediately
Every drinking and driving charge in Ontario carries an immediate 90-day administrative licence suspension, before any finding of guilt and regardless of what happens to the charge. You will normally be released from the station with a court date.
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First appearance and the start of disclosure
Your first appearance begins the disclosure process rather than completing it. An initial package usually arrives first — officer notes, the breath technician’s certificate, the screening device record — and further material such as maintenance logs, calibration records and video often has to be requested, sometimes more than once.
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Scrutinizing the whole investigation
We go through the case from the first moment of the stop to the last breath test, looking for the mistakes police made along the way: the basis for each demand, the timing of every step, how the instrument was maintained and operated, what you were told about your right to a lawyer, and whether you were given a real chance to use it.
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Resolution or trial
Some cases are resolved without a trial — by withdrawal, a plea to a lesser or different charge, or reduced penalties such as a shorter driving prohibition. Others go to trial, where Charter applications to exclude the breath readings are argued as part of the trial itself.
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Appeal, if needed
A conviction or sentence can be appealed, and a driving prohibition can sometimes be suspended while the appeal is heard.
Questions about impaired driving and DUI charges
Full answers from our original article, grouped by topic.
The charges
What is drinking and driving?
Driving while impaired by alcohol, driving with more than 80 milligrams of alcohol in 100 millilitres of blood (Over 80) or refusing to provide a breath sample are all examples of drinking and driving offences in Canada.
What is the difference between impaired driving, over 80, and refusal to provide a breath sample?
Impaired driving, over 80 and refusing to provide a breath sample are proven in different ways. Each is explained below.
What does the Crown have to prove on an impaired driving charge?
In order to establish an impaired driving charge, the crown attorney must prove beyond a reasonable doubt that the driver's ability to operate a motor vehicle was impaired due to the consumption of drugs or alcohol. The court will examine the driver's co-ordination, comprehension and a poor driving pattern in assessing their level of impairment.
Evidence of impairment may be proven by a combination of driving observations and physical observations of the driver. Evidence of poor or erratic driving, weaving, crossing of the centre line or evidence of a motor vehicle collision may all be used to support an inference of impaired driving. Personal observations tending to reveal signs of impairment may also be relied upon, including: an odour of alcoholic beverage emanating from the driver's breath, bloodshot eyes, dilated pupils, unsteadiness, slurred speech and a lack of comprehension or response to police demands.
How do police prove impairment, and whose opinion counts?
Intoxication and impairment does not require the opinion of a medical expert. A police officer or other lay person is perfectly qualified to give their opinion on whether a person appears impaired by alcohol or drugs. Opinions of police officers about a person's level of impairment are not to be given more weight in court simply because they come from police officers.
What does an over 80 charge require the Crown to prove?
Unlike impaired driving, the offence of "over 80" does not require proof of impairment of any kind, only proof that the driver had a concentration of alcohol in their blood exceeding 80 milligrams of alcohol in one hundred millilitres of blood. This alcohol concentration reading is usually determined from an analysis of breath samples obtained by police and processed with a breathalyser machine capable of providing such results. These results can also be obtained by testing a sample of the driver's blood.
A person under investigation for being over 80 does not get to choose whether they will provide a breath sample or a blood sample. Only a police officer can choose whether to demand a blood sample. An officer can demand a blood sample only in two situations. The officer must believe either that the person may be physically unable to give a breath sample, or that getting one would be impractical in the circumstances. Put differently, a blood sample to determine the concentration of alcohol in a person's body is a process of last resort.
What is a refuse to blow or refuse breath sample charge?
The offence of refusing to provide a breath sample, either for the roadside screening device or an approved breathalyser machine at the police station is another drinking and driving offence. The consequences of a conviction on only this charge is essentially the same as a conviction for impaired driving or over 80, namely, a criminal conviction, driving prohibition, license suspension and the same insurance consequences. A person convicted of refusing to provide a breath sample may also be convicted of driving while impaired.
To convict someone of failing or refusing a breath sample, the prosecutor must prove three things beyond a reasonable doubt. First, the officer made a valid and lawful demand for the breath sample. Second, the defendant failed or refused to give the sample. Third, the defendant intended that failure. Most breath refusal cases will turn on whether the officer had a sufficient basis to make the breath demand and whether they intentionally failed to provide a breath sample. Quite often, a person may fail to provide a sample due to a medical reason such as an injury or a breathing disorder such as Asthma which may make it challenging to comply with the officer's demand for a breath sample. Read more about refusing to provide a breath sample and how you can defend this type of charge.
The investigation
What happens during a traffic stop for drinking and driving?
In Canada, provincial driving legislation such as the Highway Traffic Act in Ontario, enables police to stop and investigate drivers for drinking and driving offences. Police may also set up stop checkpoints to pull vehicles over for the purpose of checking for signs of drunk driving, known as R.I.D.E. (Reduce Impaired Driving Everywhere).
This power to investigate a driver of a motor vehicle regarding their sobriety does not require the officer to suspect a person has consumed alcohol or is impaired by alcohol or drugs when they commence their investigation. Anyone can be investigated for drinking and driving. While the law allows a person to be stopped in a drinking and driving investigation, the law does not always permit an officer to demand a roadside breath test without more.
In some cases, an officer can demand a roadside breath test only if the person under investigation is operating or "in care or control" of a motor vehicle and the officer reasonably suspects the person has alcohol in their body. The officer may have a reasonable suspicion the person has alcohol in their body if they admit to have recently consumed alcohol or if the person under investigation demonstrates visible signs of impairment. Even the odour of an alcoholic beverage emanating from the mouth of the driver may be enough to initiate a roadside breath test. In other cases, an officer who has an approved screening device with them can demand a roadside breath test from any driver they have lawfully stopped, with no suspicion required.
Once the officer reasonably suspects the driver to have alcohol in their system, they may require the driver to provide a sample of their breath into a special breath testing device for analysis. In some instances, the failure of police to establish they had grounds to suspect alcohol had been recently consumed may amount to a defence to an over 80 or refuse breath sample charge because the unlawful breath demand would invalidate the subsequent test results.
The roadside screening test results will either return a "pass", "warn" or "fail" result. The machine is calibrated to fail when a person has over 100 milligrams of alcohol in 100 millilitres of blood. Failing the roadside test is not evidence that can be used at a person's trial for an over 80 charge.
Evidence of a failed test is not proof of the level of alcohol in the person's blood. It is only used to justify a further demand for a sample of breath into an "approved instrument" capable of providing a proper reading of the person's blood alcohol level. Once a driver fails the roadside breath test, the officer will be permitted to arrest the driver for the offence of driving with over 80 mg of alcohol in their body. An arrest for over 80 charge may also be accompanied by an arrest for impaired driving if the driver exhibits clear signs of impairment by the manner they were driving the vehicle or physical observations of the driver under investigation. An arrest will require the driver to be brought to the police station for a further set of tests which may be used in evidence at their trial for a drinking and driving offence.
Can I speak to a lawyer before I give a breath sample?
Upon arrest, an individual is entitled to consult with a lawyer for the purpose of obtaining advice about their legal situation prior to providing a breath sample at the station. Everyone on arrest must also be advised of the availability of a 24-hour toll-free legal aid number for those who do not have a lawyer to call but wish to obtain legal advice. If the police fail to advise a person under arrest of these constitutional rights, or fail to provide the person under arrest an opportunity to contact counsel, the failure to do so may result in the exclusion of the defendant's alcohol level readings obtained at the police station. This exclusion of evidence would likely result in an acquittal at trial.
The right to consult with counsel is not an absolute right at the time of a roadside demand for a breath sample (as the accused is not under arrest at this time). Recent case law developments suggest that in some circumstances, a person required to provide a roadside breath sample may have a right to consult with counsel prior to providing a breath sample if the roadside breath testing machine is not readily available and there will be a delay in getting the machine to the person under investigation. In some instances, the failure to permit consultation with a lawyer prior to providing the roadside sample may result in the exclusion of the sample and any subsequent evidence.
Defences, penalties and consequences
Are there defences to drinking and driving charges?
There are a number of ways to defend against allegations of drinking and driving. The defences to these types of allegations vary, from challenging the accuracy of the machine receiving the breath sample, to challenging the officer's belief for demanding the sample in the first place. Other defences may be raised based on the denial of constitutional rights prior to the taking of breath samples or delay in the testing procedures.
To learn more about the practical realities of facing an impaired driving charge, read our articles on 5 surprising truths about impaired driving charges in Toronto and 7 surprising truths about refusing a breath sample. You may also want to learn about what happens when police allege you were in "care and control" of a vehicle while impaired.
What are the penalties for drinking and driving in Canada?
The Criminal Code provides a minimum fine of $1000 for a first offence in addition to a criminal conviction registered on your permanent record. Subsequent drunk driving convictions carry minimum jail penalties beginning with 30 days in jail for a second conviction. A third or subsequent drinking and driving offence will carry a minimum punishment of 120 days in jail.
A drinking and driving conviction will also require a mandatory driving prohibition preventing a prohibited driver from driving anywhere in Canada for a minimum of one year. In Ontario, an eligible driver can shorten the time off the road through the province’s ignition interlock program, explained in the questions below. In addition to the penalties mandated under the Criminal Code, a conviction for DUI will also drastically affect your motor vehicle insurance coverage and premiums. In Ontario, you will probably be required to insure with Facility Association, which insures high-risk drivers and exacts high premiums. For each of the three years following your conviction, Facility Association will levy a 100 per cent surcharge atop your premiums. It will impose more surcharges, up to a maximum of 250 per cent, for other convictions relating to the same incident, such as careless driving or failing to remain at the scene of an accident. Each insurance company has its own conviction surcharge schedule.
Can I get my licence back sooner after a first impaired driving conviction?
Often, yes. A first conviction for impaired driving, over 80 or refusing a breath sample brings a Criminal Code driving prohibition of at least one year and, in Ontario, a one-year licence suspension. Ontario’s Reduced Suspension with Ignition Interlock Conduct Review Program lets an eligible driver back on the road early, on condition that the vehicle they drive is fitted with an ignition interlock device: a breath tester wired to the ignition that has to be passed before the car will start and again at random while it is being driven.
A first offence falls into one of two streams. Stream A is for a driver who pleads guilty and is sentenced within 90 days of the offence date: the suspension can end after three months, followed by at least nine months with an interlock. Stream B covers every other first offender, including someone convicted after a trial: the suspension can end after six months, followed by at least 12 months with an interlock. Either way, the driver has to complete the Back on Track remedial program assessment and lease an approved interlock, and in Stream A the application has to be made within three months of sentencing.
The sentencing judge has the last word. The program is open only if the judge’s prohibition order under section 320.24(10) of the Criminal Code does not exclude the driver from it, and on a first offence the judge can also set a period that must pass before the driver may enter it. Whether to aim for Stream A is a decision to make before the plea, because the 90-day window closes quickly.
Who is not eligible for a reduced licence suspension?
The program covers alcohol-impaired driving only. A driver is not eligible where the offence involved impairment by a drug, or by a drug combined with alcohol; where the offence caused bodily harm or death; where the judge’s order excludes them; where their licence was already subject to an ignition interlock condition on the day of the offence; or where their licence was suspended for driving while prohibited within the five years before (ten years on a second offence).
A refusal to provide a breath sample is treated in the same way as impaired driving and over 80, so a first refusal conviction can qualify. An accident on its own does not disqualify a driver as long as no one was hurt, and a high breath reading is not a bar in itself, although both can bear on whether the judge is prepared to allow early entry to the program.
Is there a reduced suspension for a second impaired driving conviction?
Yes, in Stream D. A second conviction brings a Criminal Code prohibition of at least two years and, in Ontario, a three-year licence suspension. A driver who pleads guilty and is sentenced within 90 days of the offence date can return to driving after at least nine months, and then has to drive with an interlock for at least 18 months. The Criminal Code does not allow anyone into an interlock program on a second offence until at least three months after sentence, or longer if the judge orders it. A third conviction brings an indefinite suspension in Ontario.
What are the consequences for a drinking and driving conviction?
The maximum punishments for operation while impaired, driving with a blood-alcohol level over the legal limit and failure to comply with a demand to provide a breath or blood sample are identical, though the minimum fines on a first offence differ. These are hybrid offences, and whether they are prosecuted by indictment or summary conviction there is a minimum fine of $1,000 for a first offence, 30 days imprisonment for a second offence and 120 days imprisonment for each subsequent offence. On a first offence the minimum fine rises to $1,500 where the reading is 120 to 159mg and $2,000 at 160mg or more, and a refusal carries a $2,000 minimum fine. If the Crown prosecutes by indictment, the maximum term of imprisonment is 10 years; on summary conviction the maximum is a $5,000 fine or two years less a day. If bodily harm is caused, no matter which offence is charged, the maximum term is 14 years' imprisonment when the Crown proceeds by indictment. If death is caused, the offence is indictable and the maximum term is life imprisonment.
A minimum fine consequence for any drinking and driving offence means that a person convicted of any of these offences will have a permanent criminal record. All drinking and driving offences carry a mandatory license suspension of at least 12 months.
Charges we defend
Learn more about some of the charges we defend. We also defend charges not listed here.
- Arson
- Assault
- Attempted murder
- Bail hearings
- Bail pending appeal
- Break and enter
- Child luring
- Child pornography (CSAEM)
- Coercive control
- Criminal appeals
- Criminal harassment
- Criminal negligence
- Dangerous driving
- Distributing an intimate image
- Domestic assault
- Drug possession
- Drug trafficking
- Extortion
- Extradition
- Fail to appear at court
- Fail to comply with bail
- Failing to remain at the scene
- Firearm and weapon possession
- Firearms trafficking
- Forcible confinement
- Fraud
- Impaired driving
- Importing drugs
- Mischief
- Murder and manslaughter
- Obstruct police
- Peace bonds
- Pointing or using a firearm
- Public mischief
- Refusing a breath sample
- Robbery
- Sexual assault
- Sexual exploitation
- Theft and shoplifting
- Uttering threats
- Voyeurism
- Weapon for a dangerous purpose
- Young offenders
Charged with impaired driving or over 80?
For a confidential consultation, call Daniel Brown Law at (416) 297-7200 to discuss your case. We are available 24/7 and appear in courthouses across Ontario.






