This page explains what counts as a third offence, how the case is built, the penalties, the court process and the defence options that may apply.
What Counts as a Third DUI Offence?
Under the Criminal Code, a charge becomes a third offence when you are convicted after two earlier convictions for offences such as:
- Impaired driving by alcohol, or over 80
- Drug-impaired driving
- Refusing or failing to provide a breath or other sample
The law counts prior convictions regardless of which province they occurred in, because impaired driving laws fall under federal jurisdiction. For mandatory minimum purposes, priors generally count if they are within the last 10 years. Older convictions may not trigger the higher minimum, but a judge can still consider your whole record when deciding on a sentence.
The distinction between federal Criminal Code charges and Ontario Highway Traffic Act penalties is crucial:
- The Criminal Code creates the impaired driving offences and sets the mandatory minimum penalties.
- Ontario adds administrative penalties, including an immediate 90-day licence suspension and a 7-day vehicle impoundment, followed by a lifetime suspension on conviction.
These two penalty tracks operate at the same time, so you face consequences under both.
How a Third DUI Is Investigated and Proven
The police investigation is the same as for any impaired driving charge. It often starts at a RIDE check stop or a traffic stop by Toronto Police Service, a regional police service or the OPP on a 400-series highway. Under s. 320.27(2), an officer with an approved screening device may demand a roadside breath sample from any lawfully stopped driver. A fail or other reasonable grounds can lead to arrest and two breath samples on the Intoxilyzer 8000C at the station.
The Crown must first prove the new offence beyond a reasonable doubt, using officer notes, breath results, instrument records and video. Only after a finding of guilt does the Crown rely on your two prior convictions to seek the mandatory minimum for a repeat offender. Your history does not lower the burden of proof on the new charge.
Why a Third Charge Is Not a Foregone Conclusion
People facing a third charge often assume the result is decided before they reach court. It is not. The police must still have followed the law at every stage: a lawful stop, a valid roadside demand, reasonable grounds for the station demand, prompt access to a lawyer and properly recorded breath tests. The Crown must also prove each prior conviction properly before the higher minimum applies. A gap in any of these areas can change the outcome, and the only way to find one is to review the full disclosure, including the video and the instrument records, line by line.
Penalties for a Third DUI in Ontario
A third conviction triggers more serious criminal and licensing consequences than a first DUI or a second impaired driving conviction.
| Consequence | Third or subsequent offence |
|---|---|
| Mandatory minimum sentence | 120 days imprisonment |
| Maximum sentence, no injury | 2 years less a day (summary) or 10 years (indictment) |
| Criminal driving prohibition (s. 320.24) | At least 3 years, no maximum |
| Aggravating factor | BAC of 120 mg or more (s. 320.22) |
| Criminal record | Yes |
| Ontario licence suspension on conviction | Lifetime, may be reduced after 10 years if conditions are met |
| Back on Track remedial program | Must be completed before any reinstatement |
| Ignition interlock | Required as a licence condition after any reinstatement |
| Immediate provincial penalties | 90-day ADLS, 7-day impoundment, administrative monetary penalty |
Where the driving causes bodily harm, the maximum rises to 14 years by indictment, and where it causes death, the maximum is life imprisonment. Probation and a fine may also form part of the sentence at the judge's discretion. Ontario's page on impaired driving penalties sets out the provincial licence rules.
Other Costs of a Third Conviction
The court's sentence is only part of the financial impact. A third conviction can bring many other costs:
- Towing and storage charges for the impounded vehicle
- Licence reinstatement fees, if reinstatement becomes possible
- Fees for the Back on Track program and for installing and maintaining an ignition interlock device
- Much higher insurance premiums, or difficulty finding coverage at all
- Lost income during custody and the long period without a licence
A third conviction also brings the longest interlock term. Our guide explains how long the ignition interlock condition lasts and what it costs, and if reinstatement becomes possible after 10 years, the steps to reinstate your licence still apply in full.
A criminal record also affects employment, professional licences and travel. You can seek a record suspension only after a waiting period that begins once the full sentence is complete: 5 years for a summary conviction and 10 years for an indictable one. For permanent residents and foreign nationals, a conviction can lead to inadmissibility or removal, so immigration advice is important.
The Court Process From Charge to Sentencing
Like most DUI charges in the GTA, third-offence cases go to the Ontario Court of Justice. The main stages are:
- Bail or release. Depending on your record and circumstances, you may be released by police or brought before the court for a bail hearing.
- Disclosure. The Crown provides the police evidence and your criminal record. We review officer notes, video, Intoxilyzer 8000C records and maintenance logs, and the court records of each prior conviction.
- Crown and judicial pretrials. Your lawyer learns the Crown's position on sentence, raises problems with the evidence and narrows the issues for trial.
- Trial. The judge usually hears Charter applications and the evidence together.
- Sentencing. If there is a conviction or plea, the Crown proves the priors and both sides make submissions on sentence.
Under R. v. Jordan, 2016 SCC 27, cases in the Ontario Court of Justice should generally be completed within 18 months, and unreasonable delay not caused by the defence can lead to a stay.
Defence Strategies for a Third DUI Charge
Defending a third DUI charge requires a thorough investigation of every part of the stop, the arrest and the evidence collection. Possible approaches include:
- Charter challenges. Breaches of s. 8, s. 9 or s. 10(b), such as an unlawful stop or a delay in contacting a lawyer, can lead to evidence being excluded under s. 24(2).
- Challenging breath and blood test results. Instrument records, maintenance logs and the way samples were taken and recorded can all be examined.
- Questioning approved screening device results and the grounds for the station demand.
- Testing the impairment evidence. Officer observations can be challenged with video, witnesses and medical explanations.
- Reviewing the prior convictions. We check the dates, offences and proof of each prior, since the mandatory minimum depends on them.
- Delay. Where the case exceeds the Jordan ceiling, a stay may be sought.
- Plea negotiations. Where the evidence has weaknesses, the Crown may consider a resolution to a lesser charge or a different sentencing position.
The right strategy depends on the case and its circumstances. No lawyer can promise an outcome, but every third charge deserves a full review before you make any decision.
Preparing for Sentencing
If the evidence is strong, preparation for sentencing matters a great deal. Your lawyer can gather information about your employment, family responsibilities, health and any steps you have taken to address alcohol or drug use. Enrolling in counselling early, and understanding what the Back on Track program will require, shows the court you are taking the situation seriously.
What to Do Right Now After a Third DUI Charge
- Do not drive under any circumstances while suspended or prohibited. A new charge for driving while prohibited would add a separate criminal count.
- Comply with every release or bail condition.
- Collect records of your earlier convictions and any treatment or counselling you have completed.
- Avoid discussing the case with anyone except your lawyer, including on social media.
- Get legal advice immediately, before your first appearance if possible.
Our impaired driving defence guide goes into the defences courts consider in more depth. If Peel or York police laid your charge, our pages on Brampton DUI charges and impaired driving defence in Vaughan cover how cases move through those regions. Our Thornhill page has a section on what changes on a second or third charge, and the courthouse described on our Newmarket DUI lawyer page hears every York Region repeat case.
Our Toronto impaired driving defence team answers the phone 24/7 at 647-797-5256.