Self-defence item and weapons rules — the legality of self-defence spray, stun guns and knives
A factual guide, drawn from official sources, on whether you may possess or carry self-defence spray, stun guns or knives in Australia, covering state-by-state weapons rules and the "legal at home ≠ legal in Australia" misconception.
Why do you need to know Australia's weapons and self-defence item rules?
In Australia, the rules on possessing and carrying weapons and self-defence items are set by each state and territory's own laws, not federal law. So the same item may be treated differently depending on where you live. This guide does not cover response methods such as "how to defend yourself"; it only conveys the fact of whether merely possessing a given item is legal. In particular, items such as pepper spray, stun guns and certain knives — which civilians commonly possess in other countries — can in Australia make you liable to criminal prosecution simply for possessing them, so the misconception that "it's legal at home, so it must be fine in Australia" becomes a serious risk.
How do "possession rules" differ from "police investigation and victim support"?
This guide focuses on the prior fact of whether it is legal to possess or carry a weapon or self-defence item. Your rights if you are found in possession and become subject to a police investigation (the right to silence, interpreting, a solicitor) are covered in the your rights during police questioning guide, and support and compensation when you are exposed to violence or harm from crime are covered separately in the domestic and family violence support and support for victims of crime guides. We do not repeat that content here and only link to it where relevant.
How to check your state's weapons rules
The most accurate way to check the rules is to look at the official weapons page of the police in the state or territory where you live. The governing laws and terminology differ slightly from state to state — for example, NSW relies on the Weapons Prohibition Act 1998, VIC on the Control of Weapons Act 1990, and QLD on the Weapons Act 1990. You should rely on the official list rather than internet blogs or overseas information, and because the law is amended, always check the latest page.
How are "prohibited weapons" and "controlled weapons" distinguished?
State police pages usually provide lists that distinguish between prohibited weapons and controlled weapons. Prohibited weapons are in principle banned from possession, while controlled weapons may be carried only where there is a lawful excuse. Along with the lists, always check what is accepted as a "lawful excuse" — in Australia, "self-defence" is generally not included.
- First identify the state or territory you currently live or stay in. The rules are set by each state and territory's own laws, not federally.
- On the official website of that state police (state police), find the "weapons" or "prohibited weapons" page.
Permits and eligibility to possess
Some states issue a prohibited weapons permit for a limited range of legitimate purposes only. However, the accepted purposes are narrow — occupational, collecting, specific industries and the like — and "self-defence" is generally not a permit ground. The types of permit, requirements and fees differ by state and are amended, so you must check the details on your state police's official guidance.
- Permits are issued only for a limited range of legitimate purposes such as occupation, collecting or specific industries, and "self-defence" is in most cases not an accepted ground.
- The types of permit, requirements, fees and assessment process differ by state and are frequently amended. Always check the latest details on your state police's official guidance.
Understanding the legality of each item
Below is a summary of commonly misunderstood items, focused on the facts of legality. None of this is an encouragement to "carry it like this", and because the rules differ by state, do not assume a particular item is "legal" — always check your state police's list.
Because civilians can buy it in many countries, it's easy to assume "it's fine in Australia too", but in most Australian states it is classified as a prohibited or controlled weapon and merely possessing it can make you liable to penalties. The rules genuinely differ from state to state, so always check your state police's list, and if unclear, do not carry or possess it.
Electrical weapons such as stun guns and tasers (conducted electrical weapons) are a classic example of items treated as a prohibited weapon for the general public in every state. Possessing, buying or importing them without a specific permit is generally illegal, and buying online is no exception.
Certain knives such as a flick knife or butterfly knife are prohibited weapons in themselves. Even an ordinary pocket knife is unlawful if carried in a public place without a lawful excuse, and "self-defence" is generally not accepted as a lawful excuse.
Step-by-step practical tips
This is the order to follow to check the legality safely. As a rule, if you are not certain at any step, hold off on carrying or possessing the item.
- First pinpoint the state or territory you currently live or stay in.
- Find and check the prohibited and controlled weapons list on that state police's official website.
- Check whether self-defence is included in "lawful excuse" (generally it is not).
Common misconceptions and mistakes
The following are common misconceptions that actually lead to criminal risk.
- "It's legal at home, so it's fine in Australia" — weapons rules differ from country to country. Do not judge by comparison between countries.
- "I can just explain it's for self-defence" — in Australia, self-defence purposes are generally not accepted as a lawful excuse.
- "I bought it online, so it's legal" — the possession and import rules apply regardless of how you bought it.
Useful official links
- NSW Police — Firearms & Weapons(opens in a new window)
NSW Police firearms and weapons information — details on prohibited weapons under the Weapons Prohibition Act 1998
- Victoria Police — Weapons(opens in a new window)
Victoria (VIC) Police weapons and firearms information — rules under the Control of Weapons Act 1990
- Queensland Police — Weapons Licensing(opens in a new window)
Queensland (QLD) Police weapons licensing — permit and prohibition information under the Weapons Act 1990