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Cannabis Laws in Western Australia 2026 — CIR Scheme, Penalties & Medicinal Access
A complete 2026 guide to cannabis laws in Western Australia — how the Cannabis Intervention Requirement works for small possession, WA penalties, cultivation rules, drug driving laws and how to access medicinal cannabis legally in Perth.
Western Australia’s approach to cannabis sits between the strict Queensland model and the more lenient South Australian framework. The state operates the Cannabis Intervention Requirement (CIR) — a structured non-criminal pathway for adults found with 10 grams or less of cannabis — while maintaining criminal penalties for possession above that threshold and for all cultivation and supply.
This guide covers the CIR scheme in full, WA’s possession and cultivation penalties, drug driving laws in the state, and how to access cannabis legally through the medicinal pathway in Perth and across WA.
Legal disclaimer: This article is for general information only and does not constitute legal advice. Verify current rules with Legal Aid WA or a criminal lawyer before acting.
Western Australia cannabis laws at a glance
| WA rule (2026) | |
|---|---|
| CIR eligibility | Possession of ≤10g, first or second offence |
| CIR outcome | Mandatory 4-hour cannabis education session — no criminal record |
| Third possession offence | Criminal charges regardless of quantity |
| Possession >10g | Criminal offence — charges apply |
| Maximum possession penalty | Fine up to $2,000 and/or 2 years imprisonment |
| Cultivation (any amount) | Criminal offence — serious penalties |
| Drug driving | Zero-tolerance — any detectable THC is an offence |
| Medicinal cannabis | Legal with valid TGA prescription |
The Cannabis Intervention Requirement (CIR)
The Cannabis Intervention Requirement is WA’s structured diversion pathway for minor cannabis possession. Introduced in 2011, the CIR scheme was designed to reduce the criminal justice burden of low-level cannabis offending while providing a health-focused intervention.
How the CIR works:
When a WA Police officer finds an adult in possession of 10 grams or less of cannabis, and it is that person’s first or second cannabis possession offence, the officer may issue a CIR notice instead of charging the person criminally.
Receiving a CIR notice means:
- No arrest
- No criminal charge is laid at that time
- No criminal record if the CIR is completed
- The person is required to attend a mandatory 4-hour cannabis education session delivered by the Cannabis Education and Information Service (CEIS)
The CEIS session is a structured group or individual education session covering the health effects of cannabis, legal consequences, and harm reduction information. It is not a treatment program — it is an education and intervention session.
Key CIR limits:
- Only 10 grams or less: Above 10g, the CIR does not apply regardless of the person’s history
- Maximum two CIRs per lifetime: A third possession offence results in criminal charges regardless of the amount found — even if it is only 1 gram
- Failure to attend the CEIS session: If a CIR notice is issued but the person does not attend the required education session, WA Police refer the matter for criminal prosecution for the original possession offence
Comparison with other state schemes:
The WA CIR threshold of 10g is notably lower than SA’s 100g expiation threshold and the NT’s 50g SCON threshold. This means WA’s non-criminal pathway applies to a narrower range of possession situations than in more lenient states.
Possession penalties in WA
Possession of cannabis beyond the CIR scheme — i.e., more than 10g, or a third offence — is a criminal offence under the Misuse of Drugs Act 1981.
| Situation | Classification | Maximum penalty |
|---|---|---|
| ≤10g, first or second offence | CIR applies | No criminal charge |
| ≤10g, third or subsequent offence | Criminal charge | Fine up to $2,000 and/or 2 years imprisonment |
| 10g–100g | Possession for personal use | Fine up to $2,000 and/or 2 years imprisonment |
| 100g+ | Presumed intent to supply | More serious supply charges |
| Supply/trafficking | Drug offence | Serious imprisonment penalties |
WA’s possession penalty for the personal range (up to $2,000 fine or 2 years) is consistent with NSW. The CIR scheme means that in practice, first and second minor possession offences typically result in a diversion session — not a conviction.
Cultivation penalties in WA
Cultivation of cannabis plants is a criminal offence in WA under the Misuse of Drugs Act 1981, regardless of the number of plants or the intended use.
Unlike in the ACT (where 2 plants per person is legal) or SA (where 1 non-hydroponic plant attracts only a fine), WA provides no leniency for personal home cultivation. Even a single plant grown for personal use can result in criminal charges.
Penalties for cultivation in WA depend on the scale:
- Small-scale personal cultivation: Typically treated as a possession-level offence — fines and possible imprisonment under the Act
- Commercial-scale cultivation: Serious drug supply offences carrying many years imprisonment
- Hydroponic setups: Viewed as commercial-intent operations regardless of scale, attracting enhanced penalties
Drug driving laws in Western Australia
WA enforces zero-tolerance roadside drug testing for THC under the Road Traffic Administration Act 2008. Driving with any detectable level of THC in oral fluid or blood is a criminal offence — the driver does not need to be impaired.
How WA roadside drug testing works:
WA Police conduct random and targeted roadside drug testing operations across the state. The oral fluid test can be requested at any traffic stop. Testing is particularly prevalent in the Perth metropolitan area and on major regional highways.
WA RDT process:
- Officer requests oral fluid sample
- Initial test: 5–10 minutes
- Positive result → second sample taken for laboratory analysis
- Laboratory result confirms presence of THC → criminal charge of drug driving
Penalties for drug driving in WA (first offence):
- Fine: up to $2,500 (court-determined)
- Licence suspension: minimum 3 months
- Criminal conviction recorded
- Possible requirement for further assessment before licence reinstatement
WA has a specific provision for drug driving combined with excessive blood alcohol — the two charges can be brought simultaneously, with significantly escalated consequences.
Regional WA and drug driving:
Regional Western Australia has high rates of roadside drug testing relative to population. Long highway drives between regional towns (particularly in the Pilbara, Kimberley and Goldfields) are active RDT areas. The combination of long driving distances and a culture of cannabis use in some regional communities creates a particular legal risk that many WA residents underestimate.
Medicinal cannabis patients in WA:
No exemption exists for medicinal cannabis patients in WA drug driving law. A valid TGA prescription for THC-containing cannabis does not protect you from a drug driving charge if THC is present in your oral fluid. The WA Department of Health and TGA have both noted this as a policy concern for patients who require medicinal cannabis and also need to drive.
Practical guidance: Do not drive within 12 hours of any THC-containing medicinal cannabis dose. Discuss driving safety with your prescriber if your dose or product changes.
Medicinal cannabis in Western Australia
Despite WA’s strict recreational cannabis enforcement, the state has become a significant part of Australia’s medicinal cannabis industry. Several licensed cannabis cultivation and manufacturing facilities operate in WA, and Perth’s GP and specialist network has strong medicinal cannabis prescribing expertise.
Accessing medicinal cannabis in Perth and WA:
Medicinal cannabis is available throughout WA through the TGA’s SAS-B pathway — no additional WA state approval is required. Any registered Australian GP can prescribe.
- Book a telehealth or in-person consultation with a medicinal cannabis-aware GP
- Prescription issued under SAS-B
- Medication dispensed and delivered — same-day delivery available in Perth and surrounding suburbs
WA patients access the same range of products available nationally — CBD oils, balanced THC:CBD products, flower, pre-rolls, edibles and more. Browse products available in WA.
Frequently asked questions — cannabis laws in Western Australia
Is cannabis legal in WA? Medicinal cannabis is legal in WA with a valid TGA prescription. Recreational cannabis is not legal — possession of any amount is either a CIR diversion (for ≤10g, first or second offence) or a criminal offence.
What is the Cannabis Intervention Requirement (CIR) in WA? The CIR is WA’s structured diversion scheme for minor cannabis possession. Adults found with 10g or less for a first or second offence receive a CIR notice requiring attendance at a 4-hour cannabis education session. Completing the session results in no criminal record. A third offence — regardless of quantity — results in criminal charges.
How much cannabis can you have in WA without criminal charges? 10 grams or less, on a first or second offence only, qualifies for the CIR diversion scheme. From a third offence, any amount results in criminal charges. Above 10g at any time results in criminal charges.
Can I grow cannabis at home in WA? No. Cultivation of any number of cannabis plants is a criminal offence in WA. There is no personal home cultivation exemption comparable to the ACT.
Can I drive after using medicinal cannabis in WA? No — not if your product contains THC. WA’s zero-tolerance drug driving law applies to all drivers including medicinal cannabis patients. THC in oral fluid is an offence regardless of prescription status.
Where can I get medicinal cannabis in Perth? Through the medicinal cannabis prescription pathway. The Cannabis Shop delivers to Perth and regional WA — a telehealth consultation is sufficient to start the process and typically costs $50–$150.