Drug possession laws in Canada are set federally by the Controlled Drugs and Substances Act (CDSA), and unauthorized possession of a listed substance is a criminal offence everywhere in the country. Penalties run from a $1,000 fine and six months in jail for a first summary conviction up to seven years in prison when the Crown proceeds by indictment on the most serious drugs.1Justice Laws Website. Controlled Drugs and Substances Act – Part I Offences and Punishment Cannabis sits outside this framework: adults can legally hold up to 30 grams in public under the separate Cannabis Act.2Government of Canada. Online Calculator: Limits for Public Possession of Cannabis
What Counts as Possession
Possession under the CDSA takes three forms, borrowed from the Criminal Code. Personal possession is the obvious one: the substance is on you, in your pocket or your bag. Constructive possession applies when you don’t have the drugs on your person but you know where they are and have some control over them. A stash in your bedroom closet or your car trunk can still be yours in law.
Joint possession covers two or more people who agree one of them will hold the substance for everyone’s benefit. The person not carrying can still be charged if they knew and had some control. In every form, the Crown must prove beyond a reasonable doubt that you knew the substance was there, knew it was a controlled substance, and had some measure of control. An honest but mistaken belief that what you had was legal can be a defence, because knowledge of the illegal nature is part of the offence.
Which Drugs Are Controlled, and in Which Schedule
The penalty you face turns on which Schedule of the CDSA lists the drug.
- Schedule I is the most heavily penalized tier and covers opioids (heroin, fentanyl, morphine, oxycodone), cocaine, methamphetamine, and their derivatives.3Justice Laws Website. Controlled Drugs and Substances Act – Schedule I
- Schedule II now contains synthetic cannabinoid receptor agonists, lab-made chemicals that mimic cannabis. Cannabis itself was moved out of this schedule in 2018.4Justice Laws Website. Controlled Drugs and Substances Act – Schedule II
- Schedule III holds psychedelics and stimulants: LSD, psilocybin, mescaline, DMT, and methylphenidate (Ritalin).5Justice Laws Website. Controlled Drugs and Substances Act – Schedule III
- Schedule IV includes barbiturates, anabolic steroids, and benzodiazepines. Simple possession of these is not prohibited under section 4(1). What is prohibited, under section 4(2), is obtaining or trying to obtain them from a practitioner without disclosing that you already got some from another source in the past 30 days.1Justice Laws Website. Controlled Drugs and Substances Act – Part I Offences and Punishment
That Schedule IV distinction catches people out. A valid prescription for a benzodiazepine is fine. Doctor-shopping to stockpile one triggers the section 4(2) offence even though holding the pills on its own wouldn’t.
Penalties for Possession Under the CDSA
For every section 4(1) possession charge, the Crown picks the route: summary conviction (less severe) or indictment (more severe). That choice drives most of the real-world variation in sentencing. The same person with the same drug can face six months or seven years depending on how the file is prosecuted.
Summary Conviction
The summary ceiling is identical across Schedules I, II, and III. A first offence carries a maximum $1,000 fine and up to six months in jail. A subsequent offence doubles the fine ceiling to $2,000 and raises the jail cap to one year.1Justice Laws Website. Controlled Drugs and Substances Act – Part I Offences and Punishment First-time simple possession cases involving small amounts and no sign of trafficking often resolve with fines, probation, or discharges rather than jail.
Indictment
The indictable maximums vary by schedule:
- Schedule I (cocaine, heroin, fentanyl, methamphetamine): up to 7 years
- Schedule II (synthetic cannabinoids): up to 5 years less a day
- Schedule III (LSD, psilocybin, mescaline): up to 3 years
All three come from section 4 of the CDSA.1Justice Laws Website. Controlled Drugs and Substances Act – Part I Offences and Punishment A section 4(2) double-doctoring charge for a Schedule IV substance prosecuted by indictment carries up to 18 months.
Cannabis Is a Separate Regime
Since October 2018, recreational cannabis has been legal for adults under the Cannabis Act, with a public possession limit of 30 grams of dried cannabis or its equivalent in other forms.2Government of Canada. Online Calculator: Limits for Public Possession of Cannabis Exceeding that public limit, or distributing more than it, remains a criminal offence. An adult prosecuted by indictment for distribution above the legal threshold faces up to 14 years. Summary penalties for most distribution offences reach $5,000 and six months.6Department of Justice Canada. Cannabis Act – Offences and Punishment Cannabis bought outside the legal retail system can also create problems, though enforcement tends to focus on large quantities rather than small personal-use amounts.
Avoiding a Criminal Record: Discharges
A finding of guilt does not have to become a conviction on your record. Under section 730 of the Criminal Code, a judge can grant an absolute or conditional discharge for any offence that carries no mandatory minimum and isn’t punishable by 14 years or life.7Justice Laws Website. Criminal Code RSC 1985, c C-46 – Section 730 Simple possession under the CDSA qualifies because it has no minimum sentence. If the judge finds a discharge is in your best interests and not contrary to the public interest, you are legally deemed not to have been convicted.
A conditional discharge comes with probation conditions; complete the probation and the discharge takes effect. An absolute discharge takes effect immediately. Either way, no conviction appears on your record, though police databases may retain information about the charge itself. For first-time offenders holding small amounts, this is a common outcome.
Drug Treatment Courts
Drug treatment courts (DTCs) operate in several Canadian cities as an alternative to standard prosecution for people whose offences are driven by addiction. Instead of moving straight to sentencing, participants enter a supervised treatment program with counselling and regular court appearances. Sections 10(4) and 10(5) of the CDSA allow a court to delay sentencing while an offender takes part in an approved program.8Public Prosecution Service of Canada. 6.1 Drug Treatment Courts
Eligibility generally requires evidence of a substance use disorder connected to the offence. People charged with large-scale trafficking, offences involving violence or weapons, or offences linked to organized crime are typically excluded. Successful completion can lead to charges being withdrawn or stayed. For participants who entered a guilty plea first, finishing the program can result in a reduced sentence, and the court is not required to impose any mandatory minimum that would otherwise apply.10Public Prosecution Service of Canada. 6.1 Drug Treatment Courts
Calling 911 During an Overdose
The Good Samaritan Drug Overdose Act added section 4.1 to the CDSA. If you call for emergency help during an overdose, you cannot be charged with simple possession under section 4(1) based on evidence that came to light because you made that call.9Government of Canada. Good Samaritan Drug Overdose Act The protection covers the caller, the person overdosing, and anyone else at the scene when help arrives.
It also shields you from being charged with breaches of bail, probation, conditional sentences, or parole conditions related to simple possession if the breach only surfaced because of the overdose call.11Government of Canada. About the Good Samaritan Drug Overdose Act It does not protect against trafficking or production charges, outstanding warrants, or other serious offences.
British Columbia’s Decriminalization Pilot Has Ended
In 2023, British Columbia launched a pilot under a federal section 56(1) exemption that decriminalized personal possession of up to 2.5 grams total of opioids, cocaine, methamphetamine, and MDMA for adults in the province. The exemption expired on January 31, 2026, and was not renewed.12Province of British Columbia. Decriminalizing People Who Use Drugs in B.C. Possession of those substances in B.C. is once again subject to the standard CDSA penalties set out above.
Travel to the United States After a Conviction
A Canadian drug conviction can create problems well after the sentence is served, and the most practical one is U.S. border admissibility. Under U.S. immigration law, any conviction for a controlled substance offence, including simple possession, makes a person inadmissible.13U.S. Department of State. 9 FAM 302.4 Ineligibility Based on Controlled Substance Violations That rule applies to cannabis convictions as well, despite legalization in many U.S. states. The U.S. does not recognize Canadian record suspensions (pardons), so a suspended conviction can still trigger a refusal.
U.S. Customs and Border Protection has access to Canadian police databases, and once a record is flagged during border screening, that information stays in U.S. systems. The main path forward for someone who has been refused is a U.S. Entry Waiver (Form I-192), which can take six to eighteen months to process. Even charges that were withdrawn or resolved by discharge can draw questions at the border, because U.S. officers evaluate admissibility on their own terms rather than deferring to how a Canadian court disposed of the matter. The discharge route helps a great deal inside Canada; it does not bind a border officer in another country.