Drink driving laws in Australia are among the strictest in the world. Even a small amount of alcohol can impair your judgment and lead to a criminal charge. Many drivers are unsure about the legal blood alcohol limit, how many standard drinks they can safely have, or how long they must wait before getting behind the wheel.
This guide explains the essential facts regarding drink driving laws in Australia, including BAC limits, penalties, and common legal misconceptions.
What is drink driving?#
Drink driving (also called driving under the influence of alcohol) occurs when a person drives a vehicle while having alcohol in their system above the legal limit.
Across Australia, drink driving is taken seriously because alcohol impairs:
- Reaction time
- Judgment
- Coordination
- Decision-making ability
Even small amounts of alcohol can significantly increase crash risk.
What is the legal drink driving limit in Australia?#
The legal limit for a fully licensed driver in Australia is a blood alcohol concentration (BAC) of 0.05. This means you must have less than 0.05 grams of alcohol in every 100 millilitres of blood.
Zero BAC restrictions#
A zero BAC applies to certain drivers regardless of experience, including:
- Learner drivers (L plates)
- Probationary drivers (P1 and P2 plates, depending on state laws)
- Drivers of heavy vehicles
- Bus, taxi, and rideshare drivers while working
- Driving instructors supervising learners
How many standard drinks can you have and drive?#
There is no exact number of drinks that guarantees you will stay under 0.05 BAC. This is one of the most common and dangerous misconceptions in Australian road safety.
Your BAC depends on:
- Body weight and gender. Smaller people may reach higher BAC levels faster.
- Metabolism and liver function. Everyone processes alcohol differently.
- Food intake. Eating may slow absorption but does not reduce BAC.
- Time and drinking speed. Rapid consumption increases BAC significantly.
As a general rule, even one or two standard drinks can place many drivers close to or over the legal limit.
How long after drinking can you drive safely?#
The body processes alcohol at a fixed rate of approximately one standard drink per hour. Nothing can speed up this process, including:
- Coffee
- Cold showers
- Water
- Exercise
- Sleep
If you consume several drinks, you may still be over the legal limit many hours later or even the following morning. The only way to be certain you are at zero BAC is to allow enough time for full elimination of alcohol from your system.
Is drink driving a criminal offence?#
Yes. In Australia, drink driving is a criminal offence. If you are caught over the limit, you will usually be required to attend court.
A conviction may result in:
- A permanent criminal record
- Immediate licence disqualification
- Significant fines
- Alcohol interlock orders
- Imprisonment for serious or repeat offences
Drink driving penalties in Australia#
Penalties vary between states and territories, but generally depend on your BAC level.
Low range (0.05 to 0.069 BAC)#
- Fine
- Licence suspension or cancellation
- Behaviour change program (in some states)
Mid range (0.07 to 0.149 BAC)#
- Higher fines
- Longer disqualification periods
- Mandatory alcohol interlock programs
- Possible criminal conviction
High range (0.15 BAC and above)#
- Long-term licence loss
- Substantial fines
- Mandatory interlock requirements
- Possible imprisonment
Alcohol interlock programs#
Most Australian jurisdictions require serious drink driving offenders to install an alcohol interlock device.
This device:
- Is fitted to your vehicle’s ignition
- Requires a breath test before the car starts
- Prevents the vehicle from starting if alcohol is detected
- Must be used for a set period after relicensing
These programs are costly and strictly enforced.
Can you challenge a drink driving charge?#
Yes, in some cases drink driving charges can be challenged. Common legal defences include:
- Testing errors. Faulty or improperly calibrated breath analysis equipment.
- Procedural issues. Police failing to follow required legal procedures.
- Timing issues. Disputes about when the test was conducted.
- Post-driving consumption. Alcohol consumed after driving but before testing.
How drink driving affects your life#
A drink driving conviction can have long-term consequences beyond fines and licence loss, including:
- Employment restrictions (especially driving-related roles)
- Increased insurance premiums
- Travel restrictions to certain countries
- Professional licensing issues in regulated industries
How Russo Lawyers & Associates can help#
Drink driving charges can have serious consequences for your licence, employment, and future. Legal representation can significantly impact the outcome of your case.
Russo Lawyers & Associates can assist by:
- Representing you in court
- Working to reduce penalties and disqualification periods
- Assessing eligibility for diversion programs (where available)
- Challenging weak or flawed prosecution evidence
- Assisting with licence restoration applications
If you have been charged with drink driving, seek legal advice as early as possible to protect your rights and your future.
Frequently asked questions
The general legal limit for fully licensed drivers in Australia is 0.05 blood alcohol concentration (BAC). This means you must have less than 0.05 grams of alcohol per 100 millilitres of blood when driving. Learner and probationary drivers are required to maintain a zero BAC.
There is no fixed number of drinks that guarantees you will stay under the legal limit. Your BAC depends on factors such as body weight, gender, metabolism, food intake, and how quickly you drink. Even one or two standard drinks may be enough to place some drivers close to or over 0.05.
Yes. Drink driving is a criminal offence in all Australian states and territories. If you are caught over the legal limit, you will generally be required to attend court and may receive a criminal record, fines, licence disqualification, and in serious cases, imprisonment.
The body processes alcohol at a rate of approximately one standard drink per hour, but this varies between individuals. There is no way to speed up alcohol elimination using coffee, sleep, exercise, or cold showers. The only safe option is to wait until all alcohol has left your system.
A zero BAC limit applies to certain drivers, including learner drivers, probationary drivers, and some professional drivers such as bus, taxi, rideshare, and heavy vehicle operators. This means they must not have any detectable alcohol in their system while driving.
Yes. Licence disqualification is a mandatory penalty for most drink driving offences in Australia. The length of suspension depends on your BAC level, prior offences, and the laws in your specific state or territory.
In most cases, yes. Drink driving is a criminal offence, which means you will usually be required to attend the Magistrates’ Court or equivalent local court in your state or territory. Some minor offences may be dealt with by infringement notices depending on jurisdiction.
High-range drink driving (typically 0.15 BAC or above) is treated as a serious offence. Penalties can include lengthy licence disqualification, substantial fines, mandatory alcohol interlock programs, and in some cases, imprisonment.
Yes. A drink driving conviction can result in a criminal record, particularly if a conviction is recorded by the court. This may impact employment, insurance, and travel to certain countries.
