Driving Under the Influence (DUI)

Home Drink Driving & Traffic Driving Under the Influence (DUI)

Drive Under Influence (DUI)

What is Drive Under Influence (DUI)?

You may be charged with this offence, commonly known as DUI, if you have been accused of driving under the influence of either alcohol or drugs. In the case of drugs, it doesn’t matter whether the drug is prohibited or prescription, DUI Drink Driving Under the Influence Lawyerswhat is important is whether it has impaired your ability to drive.

This is not a frequent charge, mainly because the police need to be able to establish that you were noticeably affected by alcohol or drugs, which can be difficult to do.

Circumstances where you may be charged with DUI include:

  • It is too late to lay a drink driving charge because more than two hours has elapsed, and a breath analysis is prohibited by law.

  • You cannot be charged with drink driving because you were injured in a car accident.

  • There is no evidence of alcohol use, but you appear to be under the influence of a drug, for example through slurred speech or blurry eyes.

What are the penalties for Drive Under Influence (DUI)?

The potential penalties for DUI include:

First major offence within 5 years

Maximum fine

$2,200

Minimum disqualification

6 months

Automatic disqualification (in the absence of a specific court order)

12 months

Maximum prison sentence

9 months

Second major offence within 5 years

Maximum fine

$3,300

Minimum disqualification

12 months

Automatic disqualification (in the absence of a specific court order)

3 years

Maximum prison sentence

12 months

Second major offence within 5 years (driving under the influence of alcohol)

Maximum fine

$3,300

Minimum disqualification under Interlock

9 months

Maximum disqualification under Interlock

12 months

Interlock period

2 years

Maximum prison sentence

12 months


If you are convicted of driving under the influence of alcohol for the second time in five years, you will be ordered to participate in the Interlock program. In rare circumstances, the court will grant an exemption for the Interlock program. In this case, the disqualification periods increase.

How severe is the charge against you?

DUI is considered a serious traffic offence because of the significant potential to hurt other road users or members of the public. This is reflected in the severity of the potential penalties, including prison.

A key factor taken into account by the courts is the extent that you appeared to be affected by the drug or alcohol.

However in certain circumstances, it remains open to you to argue that you should not have a conviction recorded against you, on the basis of an application under section 10. We can give you advice on your likely prospects of success with such an application.

Pharmacological report

If you are charged with the offence of DUI, obtaining a pharmacological report can form a valuable part of your defence.

This report will provide a scientific assessment of whether the amount of a drug in your system would have affected your driving ability.

For example, you may be charged with DUI if you or the vehicle smells of marijuana, and you appeared to police to be affected by it. However, a pharmacological report may reveal that the quantity of marijuana in your system at the time you were driving was so minimal that it could not reasonably have affected your driving ability. This will provide you with a defence to the charge of DUI.

Traffic Offender Intervention Program

If you are found guilty, you may be able to receive a more lenient penalty by undertaking the Traffic Offender Intervention Program.

More information about Traffic Offender Intervention Program

Interlock program

If you have been convicted of driving under the influence of alcohol for the second time in five years, the Interlock program is mandatory. After a period of licence disqualification, an Interlock device will be fitted to your car, preventing it from starting unless you provide a zero alcohol breath sample.

More information about the Interlock program

What happens next with a Drive Under Influence (DUI)?

Nyman Gibson Miralis can provide you with advice on likely penalties, available defences, and what you can do to put yourself in the best possible position to fight the charge against you. This may include obtaining pharmacological reports and any other factors which may be relevant in your individual circumstances.

Do not take risks with your future or your licence. If you have been charged with DUI contact one of our Accredited Specialists or criminal defence lawyers for advice now at either our Sydney or our Parramatta offices – your first conference is free and we attend all courts in NSW. Call 1800 NOT GUILTY or send our contact form on this page, and arrange a free conference with a solicitor today. Contact our specialists right now! 24-hour advice 7 days a week.
Any information provided, either in our
contact form or via phone, will be treated
strictly privately and in confidence.