Drug Possession Charges in Ontario

By Robb MacDonald · Updated 6 October 2026

Yes, simple drug possession is still a criminal offence in Ontario, under section 4(1) of the Controlled Drugs and Substances Act. Since 2022, police must consider a warning or referral before charging, and a prosecutor can proceed only if those alternatives are not appropriate. Most contested cases turn on whether the search was lawful.

What does the Crown have to prove in a possession case?

"Possession" is a legal term, defined in section 4(3) of the Criminal Code, and it is wider than having something in your pocket. It covers three situations.

Personal possession means having it on you, knowing what it is, with some measure of control over it. Both knowledge and control have to be proved.

Constructive possession means knowingly having it in another person's custody, or in any place, for your own use or benefit or someone else's. This is what a charge looks like when drugs are found in a glovebox, a shared apartment, or a bag in a car.

Joint possession applies where one of two or more people has it with the knowledge and consent of the rest. It is then deemed to be in the possession of all of them. Knowledge and consent are the live issues, and being in the same room is not enough.

That last distinction is where many cases are actually fought. Being in a vehicle where drugs are found is not, by itself, possession. The Crown has to prove you knew and that you had a measure of control, and where several people had access to the same space that is frequently difficult.

What are the penalties for drug possession in Canada?

The Act sets penalties by schedule rather than by name. For simple possession of a Schedule I substance, which includes cocaine, heroin, fentanyl and methamphetamine, the offence is hybrid: on indictment the maximum is seven years, and on summary conviction a first offence carries a fine of up to $1,000, up to six months in jail, or both. For Schedule II the indictable maximum is five years less a day, with the same summary range.

Cannabis is not prosecuted under this Act. Since 2018 it has been governed by the Cannabis Act, under which an adult may possess up to 30 grams of dried cannabis in public. Exceeding that limit, or possession by someone under 18, remains an offence, but it is a separate regime and the older cannabis possession jurisprudence no longer applies to it.

Do police have to give a warning instead of laying a charge?

This is the most important recent change in this area, and it is routinely overlooked. In 2022, Parliament added provisions to the Act that change how simple possession is supposed to be handled from the outset.

Section 10.1 sets out the principles: problematic substance use should be addressed primarily as a health and social issue, and interventions should protect the health, dignity and human rights of people who use drugs.

Section 10.2(1) is the operative rule. Instead of laying a charge under section 4(1), a peace officer shall consider whether it would be preferable to take no further action, to warn the person, or, with their consent, to refer them to a program or agency.

Section 10.3 limits the prosecutor. A prosecution may be started or continued only if the prosecutor considers that a warning, a referral or alternative measures would not be appropriate. Since July 2026, alternative measures are defined in the new Part XXII.2 of the Criminal Code, which replaced the old section 716 scheme.

Sections 10.4 to 10.6 require police to record any warning or referral, make that record inadmissible as proof of prior offending in later proceedings, and require records of possession convictions to be kept separate and apart.

These are not automatic outcomes and they do not create a right to diversion. But they do mean that whether the alternatives were properly considered is a legitimate question to raise, both with the officer's notes in hand and in discussions with the Crown. The wording of section 10.3 matters. It applies to continuing a prosecution, not only to starting one, so the question does not close once the charge has been laid.

Can drug charges be thrown out because of an illegal search?

Section 8 of the Charter protects against unreasonable search and seizure, and a warrantless search is presumptively unreasonable, which puts the burden on the Crown to justify it. In possession files the drugs were almost always found during a traffic stop, a pat-down, a search incident to arrest, or the execution of a warrant, and each of those has legal preconditions that can fail.

The questions that decide these cases are specific. Was the vehicle stop lawful, and did it remain a traffic stop or become an unauthorised investigation? Was there a lawful arrest before the search that was incident to it, given that a search incident to arrest cannot manufacture the grounds for the arrest? Was a protective pat-down for officer safety turned into an evidence-gathering search? Was the warrant supported by an information to obtain that survives scrutiny once the redactions are lifted?

Where a breach is established, the remedy is sought under section 24(2) of the Charter, and the analysis follows R. v. Grant, 2009 SCC 32, which weighs the seriousness of the state conduct, the impact on the accused's Charter-protected interests, and society's interest in a trial on the merits. Reported Canadian decisions, including Grant and the search jurisprudence that has developed since, are freely searchable on CanLII. In a simple possession prosecution, excluding the drugs ordinarily ends the case, because there is nothing else to prove the offence with.

Robb has run exactly this argument. In a case reported by the Toronto Star, two officers who pulled over his client said they smelled fresh-cut marijuana and searched the car. Justice Edward Belobaba of the Superior Court found they had invented the smell to justify the search, excluded the evidence, and dismissed the crack cocaine charges. Read about the case. Past results do not guarantee future outcomes.

When does possession become a trafficking charge?

The charge that changes everything is possession for the purpose of trafficking, under section 5(2) of the Act. The physical act is the same. What is added is the purpose, and the Crown proves it by inference from circumstances rather than by direct evidence.

The indicators relied on are familiar: quantity relative to what a user would hold, packaging into separate portions, scales, score sheets or debt lists, multiple phones, volumes of transactional messages, and cash in small denominations. None of these is conclusive on its own, and each is open to an innocent explanation that the disclosure may or may not exclude. The stakes are entirely different: trafficking in a Schedule I substance carries a maximum of life imprisonment, against seven years for simple possession of the same drug. Our page on drug offence defence covers trafficking and production charges in more detail.

Two practical points that catch people out

Your prosecutor is federal. Offences under the Act are prosecuted by the Public Prosecution Service of Canada, not by the provincial Crown who handles most criminal matters in Ontario. Different office, different policies, and different people to have a resolution discussion with.

A conviction can reach your immigration status. Drug convictions are among the most consequential for permanent residents and foreign nationals, and the exposure rises sharply where the charge is trafficking rather than possession. If you are not a Canadian citizen, say so at the first meeting, because it changes which outcomes are worth pursuing and immigration counsel should be involved early.

Get advice before deciding anything

Possession files are frequently resolvable without a conviction, whether through the statutory alternatives, a withdrawal once the search is examined, or a program where one fits. What they are not is a foregone conclusion, and pleading guilty at an early appearance to be finished with it forecloses every one of those routes before anyone has read the disclosure.

Robb MacDonald has practised criminal defence for more than twenty years, earned his J.D. at Queen's University in 2006, was called to the Ontario bar in 2007, and trained under Edward Greenspan QC. He is a two-time provincial advocacy champion (Arnup Cup, OTLA Cup) and is in court roughly five days a week. Every Ontario lawyer is regulated by the Law Society of Ontario.

If you have been charged, call (416) 315-1505 or email rm@lawintoronto.com. The office is at 130 Spadina Ave. #606, Toronto, ON M5V 2L4, and Robb is available day and night. You can also request a confidential consultation.