A wide range of conduct is illegal in Australia, from drink driving and carrying a knife without a lawful excuse to tax evasion, illegal recording of conversations, and bringing undeclared food through the airport. Federal Parliament sets the rules for customs, immigration, taxation, telecommunications, and cybercrime. The states and territories handle most everyday criminal offenses, traffic law, and public order. Where the two conflict, federal law wins. One practical consequence: something treated lightly in one state can carry a real penalty in another, so moving across borders is not a reset.
Drugs and Alcohol
Possessing, using, or supplying illicit drugs is illegal everywhere in Australia. Importation and exportation are federal matters; possession, use, and supply are prosecuted by each state and territory. Penalties turn on the substance, the quantity, and whether a person is caught using or supplying. A small amount of cannabis for personal use may lead to a caution or diversion in some jurisdictions. Trafficking commercial quantities of methamphetamine or heroin can lead to life imprisonment.
The drinking age is 18 nationwide. Buying alcohol for someone under 18, or selling it to a minor, is a criminal offense. The rules for minors drinking on private property are more nuanced: in most states and territories a person under 18 can lawfully consume alcohol in a private home if their parent or guardian supplies it under responsible supervision. Supplying alcohol to someone else’s child without that child’s parent or guardian approving is illegal everywhere.1Australian Government Department of Health. Alcohol Laws in Australia
Drink driving is one of the most commonly prosecuted offenses in the country. The blood alcohol concentration limit is 0.05% for most fully licensed drivers. Learner, provisional, and probationary drivers must stay at 0.00%, as must truck drivers, bus drivers, and driving instructors.2Alcohol and Drug Foundation. Blood Alcohol Concentration A first mid-range offense can result in fines of several thousand dollars, license disqualification for up to 12 months, and up to six months’ imprisonment. Repeat offenders face vehicle impoundment, fines above $10,000, and longer prison terms.3Queensland Government. Being Charged With Drink Driving High-range offenders in many jurisdictions must install an alcohol ignition interlock before getting their license back.
Driving and Traffic Rules
Traffic law is primarily a state and territory matter, though the core rules are consistent. Australians drive on the left. Speeding attracts demerit points and fines that escalate with the breach: a few kilometres over the limit may cost one or two points, while 30 km/h or more over can mean six points, heavy fines, and immediate license suspension. Accumulating enough demerit points within the relevant period triggers automatic suspension.
Seatbelts are mandatory for all occupants, and children must be in age-appropriate restraints. Using a mobile phone while driving is illegal unless the device sits in a hands-free cradle or is operated entirely by voice. Holding a phone, resting it on your lap, or touching it at a red light all count. Fines commonly run from $500 to $1,250 with three to four demerit points.4Queensland Government. Driving and Mobile Phones5Government of Western Australia. Mobile Phones and Distractions Learner and P1 drivers are often banned from any phone use whatsoever. Driving without a valid license for the vehicle type is a criminal offense that can lead to fines, vehicle impoundment, or imprisonment.
E-Scooters and Personal Mobility Devices
Rules for electric scooters and e-bikes differ significantly between jurisdictions. Most states require riders to be at least 16, wear an approved bicycle helmet, and stay below 25 km/h on roads and bike paths, with a lower cap of 10–15 km/h on footpaths where riding is permitted. The Northern Territory allows only hire e-scooters in public and bans private ones. Riding an unregistered e-scooter that exceeds the speed or power limits for its class can see it treated as an unregistered motor vehicle, with the corresponding fines.
Weapons and Firearms
Australia’s firearm laws are among the strictest in the world, shaped by the National Firearms Agreement introduced after the Port Arthur massacre in 1996. Every firearm owner needs a license, and every license requires a “genuine reason” for possession. Accepted reasons include sport or target shooting, farming, and certain occupational needs. Self-defense is explicitly not a genuine reason.6Australian Government Department of Home Affairs. National Firearms Agreement 2017 Semi-automatic weapons and handguns sit in the most heavily restricted categories and are generally available only to people who can demonstrate a specific need, such as primary producers, professional shooters, or members of approved shooting clubs.
Carrying a knife in public without a lawful excuse is illegal across Australia, and courts read “lawful excuse” narrowly. Having a knife for work, such as a chef walking home from a shift, qualifies. Carrying one “just in case” does not. Tasers, brass knuckles, and certain martial arts weapons are either banned outright or require special permits. Penalties include fines, confiscation, and imprisonment.
Theft, Fraud, and Property Damage
Theft is prosecuted under state and territory criminal codes, and penalties scale with the value stolen and the circumstances. Basic stealing offenses typically carry maximum penalties of five to seven years. Stealing from an employer, stealing a firearm, or stealing property above a certain value threshold pushes the maximum higher, often to 10 or 15 years. Tasmania applies a general maximum of 21 years for indictable stealing offenses.
Federal fraud under the Criminal Code Act 1995 can carry up to five years’ imprisonment, rising to six for aggravated offenses. State-level fraud offenses carry comparable penalties. Vandalism, graffiti, smashing windows, and keying cars are criminal offenses carrying fines, restitution orders, or imprisonment depending on the damage. Trespass on private or government land is also an offense, though generally a lower-level matter unless combined with other criminal conduct.
Assault, Domestic Violence, and Sexual Offenses
Assault laws cover everything from a push in a bar to serious violence causing permanent injury. Common assault might result in a fine or community service, while assault causing grievous bodily harm can carry a decade or more in prison. Threatening someone with violence, even without physical contact, is itself an offense in every jurisdiction.
Every state and territory has protection orders, called apprehended violence orders in New South Wales, domestic violence orders in Queensland, and similar names elsewhere. These orders can prohibit contact, require a person to stay away from certain locations, and restrict communication. Breaching one is a criminal offense that often results in imprisonment.7Family Violence Law. What Happens if Someone Breaks a Domestic Violence Order
The age of consent is 16 in most states and territories, and 17 in South Australia and Tasmania. Sexual activity with a person below the age of consent is a serious criminal offense regardless of the circumstances. Non-consensual sharing of intimate images, sometimes called “revenge porn,” is criminalized at both federal and state levels and is treated by the Commonwealth as a priority enforcement area.8Australian Government Attorney-General’s Department. Criminalisation of the Non-Consensual Sharing of Intimate Images
Public Behavior and Recording Conversations
Every jurisdiction prohibits disorderly conduct, offensive behavior, and public nuisance. The category covers aggressive behavior in public, unreasonable noise, and intimidation of bystanders. Public urination and littering carry on-the-spot fines. Public nudity or indecent exposure is illegal outside designated areas such as official nudist beaches. Harassment and stalking, including repeated unwanted contact or following someone, can result in criminal charges, restraining orders, or both.
Recording Private Conversations
Recording someone’s private conversation without their knowledge is a criminal offense in most of Australia, but the consent rules split by jurisdiction. In New South Wales, all parties to a conversation generally must consent. Victoria and Queensland operate under one-party consent rules, so you can record a conversation you are part of without telling the other person.9Australasian Legal Information Institute. Victoria Surveillance Devices Act 1999 – Section 11 Penalties for illegal recording include fines and up to two years’ imprisonment. Even in one-party consent states, recording a conversation you are not part of is illegal, and publishing a recording beyond protecting your legitimate interests can bring additional liability.
Cybercrime and Online Harm
Federal law governs most cybercrime. Gaining unauthorized access to a computer system carries up to two years’ imprisonment. Deliberately impairing electronic communications, such as launching a denial-of-service attack or hacking into a network, can bring up to 10 years. Using a telecommunications service to menace, harass, or cause offense carries a maximum of three years.10Commonwealth Director of Public Prosecutions. Cybercrime
The Online Safety Act 2021 gives the eSafety Commissioner broad powers against cyberbullying, adult cyber abuse, and image-based abuse. The Commissioner can order platforms, hosting services, or individual users to remove harmful content, typically within 24 hours. Non-compliance can lead to formal warnings, infringement notices, enforceable undertakings, injunctions, or civil penalty proceedings in the Federal Court.11Australasian Legal Information Institute. Internet and Online Safety
Online Gambling
Licensed sports betting and lottery services online are legal. Online casino games such as roulette, blackjack, and poker machines are illegal to offer to Australian residents. Live in-play sports betting online is also prohibited, though in-play bets can be placed by phone. Offshore gambling sites not licensed in Australia are illegal for operators to offer to Australians. Individual bettors are rarely prosecuted for using offshore sites, but money held with unlicensed services has no legal protection if something goes wrong.
Wildlife and the Environment
At the federal level, the Environment Protection and Biodiversity Conservation Act covers matters of national environmental significance, including actions that threaten listed species, World Heritage properties, and wetlands. Taking actions that significantly damage protected matters without approval can bring up to seven years’ imprisonment and substantial fines.12Australian Government Department of Climate Change, Energy, the Environment and Water. Actions Without an Approval Under the EPBC Act
State and territory laws add further protection. In the Northern Territory, all wildlife is protected and interfering with protected species can bring up to five years’ imprisonment.13Northern Territory Government. Wildlife Offences The ACT sets penalties of up to one year for killing a native animal, rising to two years for species with special protection status.14Australasian Legal Information Institute. Australian Capital Territory Nature Conservation Act 2014 – Section 130 Illegal fishing, hunting protected species, exceeding catch limits, and using prohibited methods all carry fines and potential equipment confiscation. Polluting waterways, dumping waste in natural areas, and removing timber or minerals from protected land without a permit are separate offenses, and causing environmental contamination can trigger clean-up orders at the offender’s expense.
Biosecurity at the Border
Every person entering Australia must complete an Incoming Passenger Card and truthfully declare any food, plant material, animal products, soil on footwear, and wildlife products. The definition of “wildlife products” is broader than many travelers expect, covering wood, seeds, coral, ivory, traditional medicines containing animal parts, leather goods, and dried flowers.15Smartraveller. Australia’s Biosecurity and Border Controls
Failing to declare items, even innocently, can bring on-the-spot infringement notices. Serious or deliberate breaches of the Biosecurity Act 2015 carry criminal penalties of up to five years’ imprisonment or 1,000 penalty units, or both.16Food and Agriculture Organization of the United Nations. Biosecurity Act 2015 Non-citizens who deliberately breach biosecurity requirements risk immediate visa cancellation. Undeclared items are seized and destroyed at the traveler’s expense. If you are unsure whether something needs to be declared, the official advice is to declare it anyway, or dispose of it in the amnesty bins before the inspection gates.15Smartraveller. Australia’s Biosecurity and Border Controls
Work and Tax
Paying wages in cash is not automatically illegal, but paying “cash in hand” to avoid tax, superannuation contributions, or minimum wage requirements is. Employers must withhold tax under the PAYG system, pay the correct award rate, provide payslips, and keep proper records regardless of how wages are physically paid. An employee’s request to be paid off the books does not shift responsibility away from the employer.
Since January 2025, deliberate underpayment of wages or entitlements is a criminal offense under amendments to the Fair Work Act. Employers who intentionally fail to pay wages, superannuation, or entitlements by their due date face criminal prosecution, with potential fines and imprisonment. Small businesses that comply with a voluntary wage compliance code are shielded from criminal referral, and employers who voluntarily disclose underpayments can enter cooperation agreements to avoid prosecution.17Fair Work Ombudsman. Criminalising Wage Underpayments and Other Issues
Tax evasion is a federal criminal offense. Making false or misleading statements to the Australian Taxation Office, failing to lodge returns, and hiding income can lead to administrative fines in less serious matters and criminal prosecution for deliberate fraud. International students carry a separate risk: working more than the allowed 48 hours per fortnight during study periods can lead to visa cancellation, regardless of whether the work itself is otherwise lawful.
Added Consequences for Visa Holders
Non-citizens face a layer of consequences Australians do not. Under section 501 of the Migration Act 1958, the Minister can cancel a visa if a person fails the “character test.” A person automatically fails that test if they have a substantial criminal record, which includes any sentence of 12 months or more in prison. The Minister must cancel the visa of anyone serving a full-time prison sentence who fails the character test on substantial criminal record grounds.18Australasian Legal Information Institute. Migration Act 1958 – Section 501
The character test also reaches people the Minister reasonably suspects have been involved in criminal organizations, people smuggling, human trafficking, or conduct indicating they are not of good character. Even relatively minor offenses, combined with other factors, can trigger visa cancellation and deportation. For anyone in Australia on a temporary or permanent visa, the immigration consequences of a conviction often matter more than the sentence itself.