Perth Drink Driving: WA PCA Penalties and Disqualification Periods
Perth drink driving penalties explained: WA fines, demerits, licence disqualification periods and interlock rules for every BAC range and offence.
Perth drink driving is one of the fastest ways to lose your licence in Western Australia, and plenty of people find that out the hard way. One more beer at a mate’s barbecue, a drive home that feels fine, and suddenly you’re blowing into a breathalyser on Canning Highway with your weekend plans falling apart.
The frustrating part is that most drivers have only a vague idea of what the rules actually are. People talk about a “PCA charge” because that’s the term used in NSW, but WA works a bit differently. Here the law sets out a sliding scale of WA drink driving penalties based on your blood alcohol concentration (BAC), your licence type and whether you’ve been caught before. A reading of 0.06 and a reading of 0.16 lead to very different outcomes.
This guide walks through the whole picture in plain English. You’ll see the infringement amounts for a first low-range offence, the court penalties for each BAC band, how long a licence disqualification lasts, when you get an immediate roadside disqualification, and when the alcohol interlock scheme kicks in. We also cover zero-limit drivers, refusing a breath test, drink and drug driving, and what to do if you’ve just been charged.
All the figures come from the WA Government’s current penalty tables. Laws change, though, and every case has its own facts. Treat this as general information rather than legal advice, and speak to a lawyer about your own situation.
Perth Drink Driving Laws: How BAC and PCA Work in WA
In WA, the offence depends on how much alcohol is in your blood when you drive. That measure is your blood alcohol concentration, recorded as grams of alcohol per 100 ml of blood. A reading of 0.05 means 0.05 grams per 100 ml.
Is “PCA” the right term in Western Australia?
Not quite. PCA (prescribed concentration of alcohol) is the formal name for drink driving charges in NSW, where offences are split into low, mid and high range. Many people searching for WA PCA penalties are really looking for the WA equivalent.
WA’s Road Traffic Act 1974 uses its own labels instead:
- Excess 0.05: driving with a BAC of 0.05 or more but under 0.08.
- Excess 0.08: driving with a BAC of 0.08 or more but under 0.15.
- Driving under the influence (DUI): driving with a BAC of 0.15 or more, or being so affected by alcohol that you can’t properly control the vehicle.
The practical idea is the same as a PCA charge. Police don’t need to show you were driving badly. If the breath or blood test says you were over your limit, the offence is made out.
What are the legal BAC limits for Perth drivers?
Most fully licensed drivers in Perth must stay under 0.05. Some drivers have a zero BAC limit, meaning any alcohol at all is an offence. That group includes:
- Learner and provisional (novice) drivers.
- People driving on an extraordinary licence.
- Drivers who were recently disqualified.
- Drivers of heavy vehicles over 22.5 tonnes GCM, vehicles carrying dangerous goods, buses carrying passengers, taxis and small charter vehicles while working.
Where do Perth drink driving laws apply?
Further than most people think. According to the WA Road Safety Commission’s drink and drug driving page, the rules cover any motor vehicle, including e-scooters and other eRideables, motorised mobility scooters, motorbikes, quad bikes and tractors. They also apply on paths, tracks, car parks and any place the public can access, not just public roads.
So riding a hired e-scooter home from Northbridge after a few drinks can lead to the same Perth drink driving charge as driving a car.
Why your BAC can surprise you
Your reading depends on how much you drank, over what period, your body size, whether you ate, and your liver health. As a rough guide, a standard drink holds 10 grams of alcohol. A full-strength beer can is about 1.5 standard drinks, and a 100 ml glass of wine is about one. Two people drinking the same amount can blow very different readings, which is why guessing is risky.
Perth Drink Driving Penalties by BAC Range
WA uses a more detailed scale than the simple low, mid and high bands you see in other states. There are seven court bands for full licence holders, and the penalty climbs with each one. Repeat offending pushes it up even further. The figures below come from the WA Road Safety Commission’s current tables for drivers holding a full licence.
First offence between 0.05 and 0.08: the infringement option
If it’s your first offence and your reading is 0.05 or more but under 0.08, police can give you an infringement notice instead of sending you to court. Paying it ends the matter.
| BAC reading | Infringement fine | Demerit points |
|---|---|---|
| 0.05 to under 0.06 | $1,000 | 3 |
| 0.06 to under 0.07 | $1,000 | 4 |
| 0.07 to under 0.08 | $1,000 | 5 |
You can choose to contest the infringement in court instead. If you do, a magistrate can fine you up to $1,250 and has discretion to disqualify you. A second or later offence in this range can’t be dealt with by infringement at all. You’ll go to court.
Excess 0.05 court penalties (0.05 to under 0.08)
| BAC band | First offence | Second offence | Subsequent offence |
|---|---|---|---|
| 0.05 to under 0.07 | Up to $1,250, disqualification at the court’s discretion | $1,250 to $2,000 and at least 6 months | $1,250 to $2,000 and at least 8 months |
| 0.07 to under 0.08 | Up to $1,250, disqualification at the court’s discretion | $1,500 to $2,000 and at least 8 months | $1,500 to $2,000 and at least 10 months |
Excess 0.08 court penalties (0.08 to under 0.15)
Once you hit 0.08, there’s no infringement option. Every case goes to the Magistrates Court and a minimum disqualification period applies even on a first offence.
| BAC band | First offence | Second offence | Subsequent offence |
|---|---|---|---|
| 0.08 to under 0.09 | $750 to $2,250 and at least 6 months | $1,600 to $2,250 and at least 8 months | $1,600 to $2,250 and at least 10 months |
| 0.09 to under 0.11 | $850 to $2,250 and at least 7 months | $1,700 to $2,250 and at least 10 months | $1,700 to $2,250 and at least 13 months |
| 0.11 to under 0.13 | $1,000 to $2,250 and at least 8 months | $1,800 to $3,000 and at least 14 months | $1,800 to $3,000 and at least 17 months |
| 0.13 to under 0.15 | $1,150 to $2,250 and at least 9 months | $2,400 to $3,750 and at least 18 months | $2,400 to $4,500 and at least 30 months |
High range: BAC of 0.15 or more
This is the most serious band, charged as driving under the influence. It carries the heaviest Perth drink driving fines and the possibility of jail.
| Offence | Fine | Minimum disqualification |
|---|---|---|
| First offence, no relevant priors | $1,700 to $3,750 | 10 months |
| First DUI offence, prior drink driving conviction at 0.08 or over | $2,400 to $3,750 | 18 months |
| First DUI offence, prior polydrug conviction at 0.08 or over | $2,700 to $3,750 | 27 months |
| Second offence | $3,150 to $5,250, or up to 9 months’ imprisonment | 30 months |
| Third or subsequent offence | $3,150 to $7,500, or up to 18 months’ imprisonment | Disqualification for life |
A few things stand out here:
- A lifetime licence disqualification is a real outcome for a third high-range offence.
- Jail is available as an alternative to a fine from the second high-range offence onwards.
- A conviction at 0.15 or above also triggers the mandatory alcohol interlock requirement, covered below.
What counts as a “second” or “subsequent” offence?
Whether an offence counts as a repeat depends on your prior convictions and when they happened, and the rules on which earlier offences count are technical. Don’t assume an old conviction has dropped off. Ask a lawyer to check your record against the current law before you plead.
Licence Disqualification After a Perth Drink Driving Charge
For most people, losing the licence hurts more than the fine. It affects work, school runs and almost everything else in a city as spread out as Perth. Here’s how the licence disqualification side works.
Immediate roadside disqualification at 0.08 and above
If you blow 0.08 or more, or refuse a breath, blood or urine test, police can hand you an immediate disqualification notice on the spot. This has been the law in WA since 1 August 2012.
What that notice means for you:
- You’re disqualified from holding or getting a licence for two months, starting straight away, unless the notice is revoked.
- You can’t apply for an extraordinary licence while the notice is in force.
- If you drive during those two months, police will impound your vehicle and you’ll face a further charge.
- If you’re later convicted, the court usually reduces your final disqualification by the time you’ve already served under the notice.
- If you’re acquitted, the notice is revoked.
Many people are caught out because the roadside notice starts before their court date. Plan for at least two months without driving from the night you’re stopped.
How court disqualification periods work
The minimum periods in the tables above are exactly that: minimums. A magistrate can go higher based on your reading, your driving history and what happened on the night. A crash, passengers in the car or erratic driving will usually push the penalty up.
For a fully licensed driver, a disqualification works as a suspension. For a novice driver, any disqualification cancels the licence, which means sitting the licensing process again once it ends.
Can you get an extraordinary licence in WA?
An extraordinary licence lets you drive for specific purposes, such as work or medical appointments, while disqualified. According to the Department of Transport’s extraordinary licence guide, you can apply for one after any court-imposed disqualification, and the application is lodged with the courts.
The catches are important:
- You can’t apply while serving a roadside disqualification notice or a demerit point suspension. You have to wait out the two months first.
- Waiting periods apply, and you’ll usually need evidence that you’ve changed your behaviour.
- Extraordinary licence holders are on a zero BAC limit.
- Breaking the conditions on time, purpose or location can get your car impounded.
If you depend on driving for income, raise this with your lawyer early. A well-prepared application can make a real difference.
The WA alcohol interlock scheme
An alcohol interlock is a breath-testing device fitted to your vehicle. The car won’t start if you blow over the set limit. WA’s scheme is mandatory and user-pays, so you cover the installation and running costs.
An interlock is required if you:
- Are convicted of driving with a BAC of 0.15 or more.
- Commit a second drink driving offence of any kind within five years.
- Fail to comply with a police request for a breath sample.
- Are convicted of dangerous driving causing death or bodily harm while so affected by alcohol you couldn’t control the vehicle.
The interlock requirement comes on top of the disqualification. You serve the disqualification first, then drive with the device fitted for a set period once you’re back on the road.
Related Perth Drink Driving Offences You Should Know
The standard BAC tables don’t cover every situation. These related offences catch a lot of Perth drivers.
Zero BAC drivers: learners, P-platers and professional drivers
If you’re on a zero limit, the penalties start at a much lower reading:
| Reading | Infringement | Court penalty | Licence consequence |
|---|---|---|---|
| Over 0 but under 0.02 | $400 and 3 demerit points | $400 to $750 | Demerit points |
| 0.02 to under 0.05 | Not available | $400 to $750 | At least 3 months’ disqualification |
For P-platers, a disqualification cancels the licence entirely. Combined with the reduced demerit allowance on a provisional licence, a single night out can set a young driver back many months. Readings of 0.05 or more are dealt with under the general BAC tables.
Refusing a breath or blood test
Refusing to give a sample is never the clever move it might seem in the moment. WA treats a refusal as seriously as the worst result:
- Police can issue an immediate two-month disqualification notice.
- Refusing a sample puts you in the mandatory alcohol interlock group.
- Drivers who refuse drug and alcohol testing face the highest penalty for the relevant impaired driving offence.
In other words, refusing can leave you worse off than blowing a high reading.
Drink and drug driving combined
Driving with an illegal BAC and an illicit drug (cannabis, ecstasy, meth or cocaine) in your system is a separate offence with steeper penalties. Even a first offence at 0.05 to under 0.07 with a drug present carries a fine of up to $1,900 and at least three months off the road. At 0.15 or above with a drug present, a third offence can mean fines of up to $11,250, 18 months’ imprisonment as an alternative, and disqualification for life.
Drug driving on its own
Testing positive for a specified drug in an oral fluid test is a first offence fine of up to $1,250 plus 3 demerit points. A second offence brings a $1,250 to $2,000 fine and at least six months’ disqualification. Police also issue a 24-hour driving ban on the spot after a positive roadside drug test or a refusal. The more serious charge of drug-impaired driving carries the same penalties as high-range drink driving.
What to Do After a Perth Drink Driving Charge
Getting charged is stressful, but the steps you take in the following weeks can affect the result. Here’s a practical sequence.
1. Read every document police gave you
Check whether you received an infringement notice, a court summons, an immediate disqualification notice, or a combination. Note your BAC reading, the court date and the start date of any roadside disqualification. Keep everything together.
2. Stop driving if you’ve been disqualified
This sounds obvious, but driving while disqualified is one of the most common ways a manageable drink driving matter turns into a serious one. It means impoundment, a new charge and a much harder hearing in front of the magistrate.
3. Get legal advice early
A lawyer can check whether the testing procedure was followed, whether your prior record counts the way police say it does, and whether you have grounds to challenge anything. If money is tight, Legal Aid WA’s traffic offence information is a good starting point, and the duty lawyer at the Perth Magistrates Court can help on the day.
4. Decide on your plea
Most Perth drink driving cases end with a guilty plea, because breath analysis evidence is hard to dispute. An early plea of guilty is generally taken into account when sentencing. If you have a genuine defence, such as a problem with the testing process, your lawyer will tell you.
5. Prepare for sentencing
If you plead guilty, what you bring to court matters. Helpful material usually includes:
- Character references from employers, community members or people who know you well.
- Proof of completing a drink driving education or counselling program.
- Evidence of how a licence loss affects your job or family.
- A short, honest explanation of what happened and what you’ve changed since.
The magistrate can’t go below the legal minimums, but good preparation can keep the outcome toward the lower end of the range.
6. Plan for life without a licence
Perth’s public transport works well along the train lines and in the inner suburbs, and less so in outer areas. Sort out lifts, rideshare, cycling routes or a temporary change in work hours before your disqualification starts, not after.
Simple ways to avoid a charge in the first place
The Road Safety Commission’s message is simple: if you plan to drink, plan not to drive. In practice:
- Leave the car at home or organise a designated driver.
- Book a rideshare or use Transperth trains and buses.
- Stay over at a mate’s place.
- Be careful the morning after. You can still be over the limit well into the next day.
Conclusion
Perth drink driving penalties follow a clear pattern: the higher your BAC and the more often you’ve offended, the harder WA comes down on you. A first reading between 0.05 and 0.08 can be settled with a $1,000 infringement and demerit points, but anything from 0.08 upwards means court, a minimum licence disqualification and usually an immediate two-month roadside ban.
High-range readings of 0.15 or more add a mandatory alcohol interlock, possible jail for repeat offenders, and even a lifetime disqualification for a third offence, while zero-limit drivers, test refusals and drink and drug combinations carry their own tough rules. If you’ve been charged, stop driving if you’re disqualified, get legal advice early, and prepare properly for court; if you haven’t, the cheapest fix is still the simplest one, which is to plan your way home before the first drink.
