Second DUI in Ontario: Penalties & What to Do Next
Yes, a second DUI in Ontario carries a mandatory minimum 30-day jail sentence on conviction, on top of a longer licence suspension and a longer ignition interlock requirement. But how much of that actually applies to you depends on facts that are easy to get wrong from the outside: how long ago the first conviction was, whether the Crown proceeds by indictment or summary conviction, and whether you're still on release for the earlier charge when the second one is laid. This guide covers what changes with a second charge, a nuance most articles skip (whether an old DUI still counts as a "prior"), and what to do in the first 48 hours.
Key Takeaways
-
Searches for second DUI Ontario, 2nd DUI Ontario, or the penalty for a second DUI in Ontario usually come down to two questions: how much jail time, and whether an old prior still counts.
- A second impaired driving conviction carries a mandatory minimum 30-day jail term under the Criminal Code, regardless of whether the Crown proceeds by indictment or summary conviction.
- Ontario's own administrative licence suspension escalation (1 year to 3 years) is tied to a conviction happening within 10 years. The Criminal Code's mandatory minimum jail and driving-prohibition provisions do not state any such time limit.
- If you're charged with a second DUI while still on release for the first one, a stricter bail test (reverse onus) can apply.
- What counts as a "prior" isn't always obvious: it can include a conviction from another province, and possibly an older conviction under the former Criminal Code sections this area of law used before December 2018.
- The two charges are reviewed together but sentenced on their own facts; a stronger disclosure review matters more, not less, the second time.
What Counts as a "Second" DUI in Ontario?
A second offence DUI charge, or a second DUI charge under any of Ontario's common labels for it, generally means a new impaired driving, Over 80, drug-related, or refusal charge under the Criminal Code's Part VIII.1 conveyance offences, where you already have an earlier conviction for one of those same offences. These are hybrid offences: the Crown can choose to proceed by indictment or by summary conviction, and that choice doesn't change whether the mandatory minimums for a second offence apply, since section 320.19 sets the same escalated minimums either way. A prior conviction from another province, or an older conviction from before Part VIII.1 replaced the previous impaired driving sections in December 2018, can potentially still count; whether a specific older or out-of-province record counts as a "prior" for your case is worth confirming with a lawyer rather than assuming either way.
Does an Old DUI Still Count as a "Prior"?
This is the part most explanations get vague about, and it's worth separating two different systems that use different rules.
Ontario's own administrative penalties, the licence suspension and ignition interlock lengths the province applies through the Highway Traffic Act, are described on Ontario's own impaired driving page as applying to "a second conviction within 10 years" and "a third conviction within 10 years." That 10-year window is how Ontario decides whether to treat you as a first-time or repeat driver for suspension and interlock purposes.
The Criminal Code's own mandatory minimums are a separate system. Section 320.19 , which sets the 30-day minimum jail term for a second offence and 120 days for each one after that, does not state any time limit on how old the earlier conviction can be. Section 320.24 , which sets the minimum driving prohibition a court imposes on conviction, doesn't state one either. Neither provision says a prior conviction stops counting after a certain number of years. That means it's possible for Ontario's own administrative rules to treat you as a first-time driver for licence purposes while the Criminal Code's mandatory minimums for a "second offence" could still apply in court, depending on how the file is handled. This is a genuinely fact-specific question, and it's one to raise directly with a lawyer reviewing your record rather than assume either way based on how long ago the first charge was.
What Happens Immediately After a Second Charge
The roadside and station process for a second charge starts the same way it does for a first one: a breath, blood, or physical coordination demand, an immediate roadside licence suspension, and possible vehicle impoundment. Where a second charge is genuinely different is bail. If you're charged with a new indictable-track DUI matter while you're still on release, an undertaking or bail order, for the earlier charge, a stricter reverse-onus bail test can apply, meaning you may have to show why your release is justified rather than the Crown having to show why detention is necessary. Whether that applies to a specific file depends on the timing and how the Crown proceeds, and it's a question worth raising with counsel immediately rather than waiting.
The Penalties, in Brief
A second conviction carries a mandatory minimum 30-day jail term, a licence suspension Ontario currently sets at a minimum of 3 years where the prior conviction falls within that 10-year window, and a longer mandatory ignition interlock period. We've broken down the full penalty table, including third-offence and aggravating-factor figures, in our comprehensive guide to being arrested for DUI in Canada , so we won't repeat the whole table here. If you're weighing how likely jail actually is on the facts of your case, our article on jail time for a first-time DUI covers how courts approach that question, though a second charge starts from a different, mandatory-minimum baseline rather than a discretionary one.
Why a Second Charge Needs Its Own Disclosure Review
A prior conviction affects sentencing if you're convicted again; it doesn't affect whether the Crown can prove the second charge. That means the roadside stop, the demand, and the reading or sample in the new case still need the same close review as a first offence would get, arguably more, since the mandatory minimum removes a judge's ability to give you a lighter sentence even where the facts are borderline. A weak spot in how the second stop was handled, a Charter issue, a procedural gap, a disclosure inconsistency, can matter as much here as it would on a first charge, and reviewing it early gives a lawyer more room to work with.
What to Do in the First 24 to 48 Hours
Provide the breath sample if you're asked for one at the roadside or station; refusing generally creates a harder charge to defend than the impaired or Over 80 charge itself. Write down what you remember about the stop while it's fresh, including anything different from your first charge. Keep every document police give you, including any release conditions. Confirm exactly what those release conditions require, since a breach on top of a pending second DUI charge creates a separate problem. Speak with a Toronto DUI lawyer before your first court date, not after, given how quickly the bail and disclosure issues on a second charge can move.
Talk to a DUI Defence Lawyer
Because a second charge starts from a mandatory minimum rather than a judge's discretion, the review of the stop, the disclosure, and your bail status matters early, not after the fact. Contact us for a free, confidential review of a second DUI charge in Ontario.
Conclusion
A second DUI in Ontario carries a mandatory minimum jail term and a longer licence suspension, but which rules apply, and whether an older prior conviction still counts, depends on facts that are easy to misjudge without a lawyer looking at the actual record. If you're facing a second charge, getting the stop, the disclosure, and your bail status reviewed early is the practical next step.
FAQs
What is the mandatory minimum jail sentence for a second DUI in Ontario?
30 days, under section 320.19 of the Criminal Code, whether the Crown proceeds by indictment or summary conviction.
Does a DUI from 10+ years ago still count as a prior offence?
It can, for Criminal Code mandatory minimum purposes, since sections 320.19 and 320.24 don't state a time limit on how old a prior conviction can be. Ontario's own administrative licence suspension escalation is separately tied to a 10-year window. Confirm your specific situation with a lawyer.
Will I definitely go to jail for a second DUI?
The 30-day minimum applies on conviction, so unlike a first offence, a judge generally can't go below it. Whether you're convicted at all still depends on the evidence and the disclosure in your specific case.
Does an out-of-province DUI conviction count as a prior in Ontario?
It can. Whether a specific out-of-province or older conviction counts as a prior for your case is a fact-specific question worth confirming with a lawyer rather than assuming either way.
What happens if I'm charged with a second DUI while still on bail for the first?
A stricter, reverse-onus bail test can apply if the new charge is alleged to have happened while you were on release for the earlier one. This depends on timing and how the Crown proceeds, so raise it with a lawyer immediately.
How much longer is the licence suspension for a second DUI?
Ontario currently sets a minimum 3-year suspension for a second conviction within 10 years, compared with 1 year for a first conviction.
Do I need a different lawyer for a second DUI than I had for the first?
Not necessarily, but the case needs its own disclosure review regardless of who represented you before. A prior conviction affects sentencing, not whether the new charge can be proven.
Should I refuse the breath test since I already have one DUI?
No. Refusing generally creates a separate, harder-to-defend charge than providing the sample and challenging the case through disclosure and procedure.