If you’re under 18 and caught with drugs in South Australia, you could be facing serious consequences and can impact your education, future job prospects, and even result in court appearances.
This guide explains what happens if you’re found with illegal substances, what “possession” means, and how the law treats young people under the Young Offenders Act.
What Happens If You’re Caught With Drugs Under 18 in South Australia?
Under South Australian law, it doesn’t matter if the drugs were yours or you were just “holding them for a mate.” If the drugs are in your pocket, bag or even nearby and police believe you were in possession (meaning you had control or access to them), you can be charged.
Possession includes:
- Holding the drugs
- Having them in your bag, locker, or room
- Being near them with the ability to control them
Penalties for Drug Possession Under 18
Whether it’s marijuana, MDMA, cocaine, dexamphetamine or vapes, the penalties for being caught with drugs if you’re underage can be signifcant.
If you’re found with illegal drugs, outcomes under the Young Offenders Act may include:
- Informal Caution: A warning without formal charges
- Formal Caution: May involve community service or commitments
- Family Conference: A discussion with you, your family and authorities to agree on actions
- Youth Court Proceedings: For serious or repeat offences
Early legal advice is critical and can lead to reduced outcomes or avoid court entirely.
When Does Possession Become Trafficking? (“Deemed Supply”)
If you’re caught with larger quantities, police may presume you intended to sell or supply the drugs. This is called “deemed supply”, and you could face much more serious charges even without evidence of actual sale.
Thresholds for Deemed Supply in South Australia:
- Vapes: 2+ vapes, 60ml+ of liquid, or 4+ vape products
- Ecstasy (MDMA): 2 grams
- Cocaine: 2 grams
- Cannabis (leaf): 250 grams
If you meet or exceed these limits, penalties may include up to 10 years imprisonment and/or fines up to $50,000 for basic offences.
Aggravated offences (e.g. near schools, involving minors, repeat offences) can attract more signifcant penalties, including longer jail terms.
What Should You Do If You’re Charged or Cautioned?
- Don’t panic or argue with police
- Don’t admit anything without a lawyer present
- Get legal advice immediately
- Keep a copy of any caution or notice you receive
A criminal lawyer can often help reduce the charge, negotiate diversion programs, or keep the matter out of court.
Call Caldicott + Isaacs: Youth Criminal Defence Experts
If you or your child has been caught with drugs or charged with a drug offence, we can help. Whether it’s your first time or a repeat incident, our team of youth criminal defence lawyers in South Australia are here to help. Call now or book a confidential consultation.
FAQs: Teen Drug Offences in South Australia (2025)
Can you get charged for ‘weed’ (marijuana) under 18 in South Australia?
Yes. Even one joint can result in a possession charge.
What is deemed supply in South Australia?
If you’re caught with a specified amount of drugs (measured in weight), police can assume you intended to sell it, even without proof of selling.
Is being caught with vapes illegal under 18 in SA?
Yes, especially THC vapes. Having 2 or more can lead to a drug trafficking charge.
Will a drug charge show up on my record if I’m under 18?
Not always. Some offences may be cautioned or diverted. More serious charges may appear unless spent.
Can a first-time offence go to court?
Yes, but with legal advice, you may be eligible for diversion or a family conference instead.
What should I say if police question me?
You have the right to remain silent and should speak to a lawyer first.
Do I have to go to court for drug possession?
Not always. If the amount is small and you cooperate, police may offer diversion or a caution.
Can my school suspend me for being caught with drugs?
Yes. Schools may take their own disciplinary action, regardless of legal outcomes.
What are my legal rights under 18 in South Australia?
You have the right to legal advice and to be treated fairly under the Young Offenders Act.
Can I get a caution instead of being charged?
Yes, especially for first offences or small amounts. A lawyer can help negotiate this.
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