
In New Zealand, the legal alcohol limit for drivers is dependent on age. For drivers under 20 years of age, there is a zero-tolerance policy, meaning that any blood alcohol concentration (BAC) level results in a drink-driving charge. For drivers 20 years and older, the legal alcohol limit is a breath alcohol limit of 250 micrograms (mcg) of alcohol per litre of breath and a blood alcohol limit of 50mg of alcohol per 100ml of blood. These limits were established by an amendment to the Land Transport Act 1998 and took effect on 1 December 2014. Exceeding these limits can result in various penalties, including fines, demerit points, disqualification from driving, or imprisonment.
| Characteristics | Values |
|---|---|
| Legal alcohol limit for drivers under 20 | Zero blood alcohol concentration (BAC) |
| Legal alcohol limit for drivers 20 and over | 250 micrograms of alcohol per litre of breath and 50mg of alcohol per 100ml of blood |
| Fine for being over the breath-alcohol limit | Dollar amount of the fine is the same as the breath-alcohol level |
| Fine for being over the blood-alcohol limit | Dollar value of the fine is five times the amount by which the blood-alcohol level exceeds the limit |
| Penalty for drivers under 20 with a blood alcohol level between 0 and 30mg | $200 on-the-spot infringement notice and demerit points |
| Penalty for drivers under 20 with a blood alcohol level between 30 and 80mg | Imprisonment up to 3 months or a fine up to $2,250, automatic disqualification for at least 3 months, and demerit points |
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What You'll Learn

Zero alcohol limit for under 20s
In New Zealand, there is a zero-tolerance policy for alcohol in drivers under the age of 20. This means that if you are under 20 and drive after consuming any alcohol, you are breaking the law and can be charged with drink-driving. This law came into effect on 7 August 2011 under the Land Transport (Road Safety and Other Matters) Amendment Act. The legal drink-drive limit is based on a person's blood alcohol concentration (BAC) and is measured through breath testing or blood testing.
The zero alcohol limit for under 20s is an important road safety measure. Research indicates that driving ability is impaired even after consuming small amounts of alcohol. Alcohol can slow reaction times and affect the senses, increasing the risk of causing death or serious injury to oneself and others. Therefore, the safest option is to refrain from driving after consuming any alcohol.
The penalties for driving under the influence of alcohol are strict in New Zealand. If you are under 20 and have an alcohol level of less than 150 micrograms per litre of breath or less than 30 milligrams per 100 millilitres of blood, you will face fines and receive 50 demerit points. If your alcohol level is higher, the consequences are more severe. You could be disqualified from driving, receive 50 demerit points, and be subject to fines or imprisonment.
It is important to note that the police in New Zealand have the authority to stop and test drivers for alcohol and drugs at any time. If you refuse to take a breath test or blood test, your license can be suspended immediately. Additionally, the penalties for repeat offences related to drink-driving are substantially higher.
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Adult alcohol limits
In New Zealand, the legal alcohol limit for adults depends on the amount of alcohol present in the blood or breath and varies according to age. The Land Transport Act 1998 outlines the legal alcohol limits for drivers.
For adults aged 20 and above, the legal alcohol limit is a breath alcohol level of 250 micrograms (mcg) of alcohol per litre of breath and a blood alcohol limit of 50 milligrams of alcohol per 100 millilitres of blood. If an adult exceeds these limits, they may be fined or imprisoned and given demerit points. The specific penalties depend on the number of previous offences and how far over the limit the driver is. For instance, a first-time offender with a breath alcohol level of 500 mcg will be fined $500, while a breath alcohol level of 600 mcg will result in a $600 fine, and so forth.
Before the amendment to the Land Transport Act in 2014, the adult alcohol limit was higher, at 400 mcg of alcohol per litre of breath and 80 milligrams of alcohol per 100 millilitres of blood.
For drivers under 20 years of age, there is a zero alcohol limit, meaning any detectable amount of alcohol in the breath or blood is illegal. If caught, young drivers face similar penalties to adults, including fines, demerit points, and potential imprisonment.
It is important to note that even small amounts of alcohol can affect driving ability, and the safest option is to refrain from driving after consuming any alcohol.
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Testing for alcohol limit
In New Zealand, the legal alcohol limit for drivers under 20 years of age is a blood alcohol concentration (BAC) of zero. For drivers 20 years old and above, the legal alcohol limit is a breath alcohol limit of 250 micrograms (mcg) of alcohol per litre of breath and a blood alcohol limit of 50 milligrams of alcohol per 100 millilitres of blood.
Breath Testing
Breath testing is a common method used to measure the alcohol content in a person's breath. It calculates the number of micrograms of alcohol per litre of breath. A breathalyser is a device used by law enforcement to check an individual's breath for alcohol content. This method provides quick results and is often used by police officers during traffic stops or when there is a suspicion of alcohol impairment.
Blood Testing
Blood testing is a more invasive method that involves taking a blood sample from an individual. It measures the number of milligrams of alcohol per 100 millilitres of blood. Blood tests are typically performed by medical professionals or approved persons, such as phlebotomists, who are trained in drawing blood. The blood sample is then sent to a laboratory for analysis, where a medical laboratory scientist prepares the samples and performs the tests using specialised equipment. Blood tests can provide more accurate readings of BAC compared to breath tests.
Field Sobriety Tests
In addition to breath and blood tests, field sobriety tests can be conducted to assess an individual's coordination, balance, and mental acuity. These tests may include an eye assessment, a walk-and-turn test, and a one-leg stand assessment. While these tests do not directly measure BAC, they help evaluate an individual's ability to safely operate a vehicle.
It is important to note that the timing of a BAC test can impact the accuracy of the results. Blood alcohol tests are typically accurate within six to twelve hours after consuming an alcoholic beverage. Additionally, BAC levels can vary over time, peaking approximately 30 to 90 minutes after drinking.
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Penalties for driving offences
In New Zealand, the penalties for driving offences related to alcohol vary depending on age, alcohol level, and the number of repeat offences.
If you are under 20 years of age, there is a zero-alcohol limit, meaning that any amount of alcohol in your system will result in a fine and 50 demerit points. For those over 18, the legal alcohol limit is 250 micrograms of alcohol per litre of breath or 50 milligrams of alcohol per 100 millilitres of blood.
If your alcohol level exceeds the legal limit, you may be disqualified from driving, given demerit points, and either fined or imprisoned. The penalties for a first offence are typically calculated by multiplying the fine by five. For example, if your blood-alcohol level is 100 mg (10 mg over the limit), you will be fined $500. For a second offence, the sentence may depend on how soon it occurred after the first. Maximum penalties are imposed for a third offence.
If you refuse to take a blood test or are found to have a certain amount of alcohol in an evidential breath or blood test, your licence will be suspended immediately. Repeat offences will result in substantially increased penalties. If you commit two alcohol-related offences within a five-year period, the disqualification can only be lifted by the Waka Kotahi NZ Transport Agency.
If your breath-alcohol level exceeds 400 micrograms or your blood-alcohol level is over 80 milligrams, you may face criminal charges. This can result in imprisonment of up to three months, a fine of up to $4,500, and automatic disqualification from driving for at least six months.
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Alcohol limit for heavy vehicles
In New Zealand, there are strict laws regarding alcohol consumption and driving. The legal blood alcohol content (BAC) limit varies depending on age. For drivers under 20 years of age, there is a zero-tolerance policy, meaning any detectable amount of alcohol in the blood or breath will result in drink-driving charges. This limit was introduced in 2011, lowering the previous limit of 150 micrograms per litre of breath and 30 milligrams per 100 millilitres of blood.
For drivers 20 years of age and older, the legal alcohol limit is 250 micrograms of alcohol per litre of breath and 50 milligrams of alcohol per 100 millilitres of blood. This limit was lowered from 400 micrograms and 80 milligrams respectively in 2013, following research and public support for stricter regulations.
The laws regarding alcohol consumption and driving apply to all drivers, including those operating heavy vehicles. There is no specific mention of heavier penalties for heavy vehicle drivers in New Zealand, unlike other countries that enforce stricter limits for commercial or heavy vehicle licenses. However, it is important to note that even small amounts of alcohol can impair driving ability, and the advice from the NZ Transport Agency is to refrain from driving if any alcohol has been consumed.
The penalties for driving under the influence of alcohol in New Zealand include fines, demerit points, licence suspension, and potential court-imposed penalties for repeat offences. Police officers can conduct random saliva tests for alcohol and drugs, and drivers are required to comply. If a driver is found to be impaired, they may be forbidden to drive and required to undergo further testing, such as blood tests or breath screening tests. Failing to comply with these tests can result in arrest and additional charges.
It is important to prioritize road safety and adhere to the legal alcohol limits when operating any vehicle in New Zealand. The specific penalties and enforcement measures for heavy vehicle drivers may vary, but the BAC limits remain consistent across all drivers, as outlined by the Land Transport Act 1998.
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Frequently asked questions
The legal alcohol limit for drivers under 20 in New Zealand is zero. This means that if you are under 20 and drive after consuming alcohol, you can be charged with drink-driving.
The legal alcohol limit for drivers over 20 in New Zealand is 250 micrograms of alcohol per litre of breath and 50 milligrams of alcohol per 100 millilitres of blood.
The penalties for driving over the legal alcohol limit in New Zealand vary depending on the driver's age and the severity of the offence. If you are under 20 and have a blood alcohol level of less than 150 micrograms per litre of breath or 30 milligrams per 100 millilitres of blood, you may be fined and given 50 demerit points. If you are over 20 and have an alcohol level between 251 and 400 micrograms per litre of breath or between 51 and 80 milligrams per 100 millilitres of blood, you may be fined and given 50 demerit points. For higher alcohol levels, you may be disqualified from driving and either fined or imprisoned.
The legal alcohol limit in New Zealand is enforced through breath testing and blood testing. Police officers can stop drivers and administer breath tests, and if the driver is over the legal limit, they may be required to undergo a blood test. If the blood test shows that the driver is over the legal limit, they will be given a copy of the blood test certificate and may be subject to penalties, including fines, demerit points, licence suspension, and imprisonment.











































