What is the drink driving alcohol limit in Singapore?
As of September 2026, the prescribed limits currently stated in Singapore’s Road Traffic Act 1961 are:
35 microgrammes of alcohol per 100 millilitres of breath
or
80 milligrammes of alcohol per 100 millilitres of blood.
However, there is a major change that every Singapore motorist should know about.
Singapore passed the Road Traffic (Miscellaneous Amendments) Act 2026, which provides for these limits to be lowered substantially to:
15 microgrammes of alcohol per 100 millilitres of breath
and
30 milligrammes of alcohol per 100 millilitres of blood.
The Act containing these amendments was published on 8 September 2026. At the time of writing, the consolidated Road Traffic Act still states the existing 35 microgramme and 80 milligramme prescribed limits.
This means motorists should pay particular attention to the commencement of the new provisions and check the latest version of Singapore’s legislation before relying on any numerical limit.
More importantly, the alcohol limit should never be interpreted as a target.
The safest rule is considerably simpler:
If you drink, do not drive.
This article explains Singapore’s drink-driving alcohol limits, the upcoming changes and some common misconceptions motorists should understand.
What Is the Current Drink Driving Alcohol Limit in Singapore?
Under Section 72 of the Road Traffic Act currently in force, the “prescribed limit” is defined as:
Breath Alcohol Limit
35 microgrammes of alcohol in 100 millilitres of breath.
Blood Alcohol Limit
80 milligrammes of alcohol in 100 millilitres of blood.
These are the figures that have traditionally been associated with drink-driving enforcement in Singapore.
However, legislation passed in 2026 will replace these thresholds with significantly lower limits.
What Is Singapore’s New Drink Driving Alcohol Limit?
The Road Traffic (Miscellaneous Amendments) Act 2026 changes the prescribed limits to:
New Breath Alcohol Limit
15 microgrammes of alcohol per 100 millilitres of breath.
New Blood Alcohol Limit
30 milligrammes of alcohol per 100 millilitres of blood.
This is a substantial reduction.
The breath limit falls from 35 to 15 microgrammes, while the blood limit falls from 80 to 30 milligrammes.
The Ministry of Home Affairs explained that Singapore’s existing prescribed alcohol limits had been in place since 1985 and that scientific understanding of alcohol impairment has advanced considerably since then.
MHA stated that evidence shows even relatively low levels of alcohol can impair a person’s reaction time, judgement, concentration and ability to respond safely to situations on the road.
The Government has therefore chosen to tighten the limits as part of efforts to strengthen deterrence and improve road safety.
Current vs New Singapore Alcohol Limits
For easy reference:
| Type of test | Current limit | New legislated limit |
|---|---|---|
| Breath | 35 µg alcohol / 100 ml breath | 15 µg / 100 ml |
| Blood | 80 mg alcohol / 100 ml blood | 30 mg / 100 ml |
The important point is that the lower limits have been legislated, but motorists should check whether the relevant provisions have commenced when determining the legal limit applicable on a particular date.
This is especially important in late 2026 because online information may contain either the old figures or the new figures without explaining the commencement issue.
Is It Legal to Drive as Long as You Are Below the Alcohol Limit?
Not necessarily.
This is one of the most important aspects of Singapore’s drink-driving law.
Section 67 of the Road Traffic Act provides alternative bases on which a drink-driving offence can arise.
Broadly, a person driving or attempting to drive a motor vehicle on a road or other public place can commit an offence where:
The person is under the influence of alcohol to such an extent as to be incapable of having proper control of the vehicle;
or
The proportion of alcohol in the person’s breath or blood exceeds the prescribed limit.
Therefore, the numerical alcohol limit should not be treated as the only consideration.
A driver should not think:
“As long as my reading is below the legal limit, I am automatically safe to drive.”
The law also addresses whether alcohol has made the person incapable of proper control of the vehicle.
How Many Drinks Can You Have Before Driving in Singapore?
There is no reliable universal answer.
Someone searching for Singapore’s alcohol limit may really be asking:
“How many beers can I drink before driving?”
or:
“Can I have two glasses of wine and still drive?”
This is not a safe way to approach the law.
The relationship between alcohol consumption and a person’s eventual breath or blood alcohol concentration varies.
It can depend on numerous factors, and different drinks can contain very different quantities of alcohol.
A glass of wine is not always the same size.
A cocktail may contain one measure of spirits at one establishment and substantially more at another.
Beer can differ in both serving size and alcohol percentage.
Two people consuming the same drinks should therefore not assume they will produce the same alcohol reading.
For this reason, motorists should not attempt to reverse-engineer the legal limit into a number of drinks.
Can You Drive After One Beer in Singapore?
There is no universal rule saying that everyone can legally drive after one beer.
A motorist should not assume:
“One beer is always okay.”
Beer comes in different sizes and alcohol concentrations.
People also process alcohol differently.
Most importantly, Singapore has legislated for a much lower prescribed alcohol limit.
The Government has expressly advised motorists that there is no “safe” number of alcoholic drinks before driving and that drivers should not drink at all if they plan to drive.
Therefore, the safest answer to:
“Can I drive after one beer?”
is not to use the number of beers as the test.
If you are planning to drive, avoiding alcohol altogether eliminates the uncertainty.
Can You Drive After One Glass of Wine?
The same principle applies.
There is no general legal exemption allowing every driver to consume one glass of wine.
The amount of alcohol consumed depends on factors such as:
The volume of the serving.
The alcohol percentage of the wine.
The actual amount consumed.
A large restaurant serving of wine could contain considerably more alcohol than a smaller serving.
Therefore, saying:
“I only had one glass.”
does not by itself establish that a person was below the prescribed limit or unaffected by alcohol.
What About Spirits and Cocktails?
Spirits can create even more uncertainty because cocktails frequently contain multiple ingredients and different quantities of alcohol.
A cocktail might contain one measure of spirits.
Another could contain several alcoholic ingredients.
The customer may not know precisely how much alcohol has been poured.
Therefore, counting cocktails is not a reliable method of determining whether someone can legally drive.
The same applies to whisky, vodka, gin, rum, brandy and other spirits.
If you intend to consume them, arrange another way home.
Can You Calculate Your Alcohol Level Based on Your Body Weight?
Online blood-alcohol calculators may provide estimates based on variables such as body weight, sex, amount consumed and time.
They should not be treated as guarantees of legal fitness to drive.
An estimate is not the same thing as an evidential breath or blood measurement.
There are too many variables for someone to sensibly say:
“The calculator says I should be under the limit, therefore I can drive.”
The consequences of getting that calculation wrong can be significant.
More importantly, another road user’s safety should not depend on whether an online alcohol calculator happened to estimate your concentration correctly.
Does Eating Before Drinking Keep You Below the Limit?
Eating can affect how alcohol is absorbed, but having a meal does not provide immunity from drink-driving laws.
A driver should not think:
“I ate a large dinner, so the alcohol doesn’t count.”
Food does not make alcohol disappear.
Similarly, drinking water alongside alcohol does not guarantee that a person will remain below the legal limit.
Coffee does not remove alcohol from the body.
Taking a shower does not eliminate alcohol.
Feeling awake does not establish that someone is legally fit to drive.
The relevant issue is not whether someone feels refreshed.
It is whether the person is legally and safely capable of driving and whether the applicable prescribed alcohol limit has been exceeded.
Can You Drive Several Hours After Drinking?
Time affects the body’s processing of alcohol, but there is no universal waiting period that guarantees every person will be legally fit to drive.
Someone may ask:
“If I stop drinking at 10pm, can I drive at midnight?”
There is no responsible general answer.
It depends on the circumstances.
A person who consumed a small quantity early in the evening is in a different position from someone who consumed a large amount shortly before stopping.
The safest approach is not to create a personal formula such as:
“Three drinks plus three hours equals safe to drive.”
Human biology does not work with that level of predictability.
If there is uncertainty, do not drive.
Can You Still Be Over the Alcohol Limit the Next Morning?
Yes, it is possible.
This is sometimes referred to as morning-after drink driving.
Someone who consumed a significant quantity of alcohol late at night may still have alcohol remaining in the body the following morning.
Sleeping does not instantly remove alcohol.
A driver may wake up, take a shower, drink coffee and feel considerably better while alcohol remains in the body.
Feeling less intoxicated is not necessarily the same thing as being below the prescribed limit.
Therefore, motorists who have consumed significant amounts of alcohol the previous night should exercise particular caution before driving the following morning.
What Happens If You Exceed the Drink Driving Limit?
Drink driving is a criminal offence in Singapore.
Section 67 of the Road Traffic Act provides that a person who drives or attempts to drive in the circumstances specified by the section is guilty of an offence.
For a first conviction, the current statutory punishment includes:
A fine of between $2,000 and $10,000;
imprisonment for up to 12 months;
or both.
For a second or subsequent conviction, the legislation provides for:
A fine of between $5,000 and $20,000;
and
imprisonment for up to 2 years.
Driving disqualification can also be a major consequence.
Therefore, exceeding the alcohol limit should not be viewed as merely receiving a traffic ticket or a few demerit points.
Can a First-Time Drink Driver Lose His or Her Licence?
Yes.
Being a first-time offender does not mean that a person keeps his or her driving licence.
The Road Traffic Act contains substantial driving-disqualification provisions for drink-driving convictions.
This can have significant consequences for someone who depends on driving for:
Work.
Business appointments.
Family transportation.
Client meetings.
School runs.
Daily commuting.
A person should therefore not assume:
“It’s my first offence, so I’ll just pay a fine.”
Drink-driving consequences can extend significantly beyond the monetary penalty.
Does a Higher Alcohol Reading Mean a More Serious Sentence?
Alcohol concentration can be an important consideration in sentencing.
For straightforward first-time drink-driving cases without an accident, Singapore’s sentencing framework has historically divided offenders into bands according to their breath alcohol readings.
Generally, a substantially higher reading can correspond with a more severe sentencing starting point.
However, alcohol level is not necessarily the only relevant consideration.
The circumstances of the driving, whether an accident occurred, harm caused and other aggravating or mitigating factors may also matter.
With Singapore legislating to lower its prescribed alcohol limit, sentencing practices will also need to be understood in the context of the law applicable when an offence occurs.
What Happens If Drink Driving Causes an Accident?
The situation can become substantially more serious.
An accident may involve:
Property damage.
Injuries.
Serious injuries.
Other traffic offences.
Dangerous or careless driving allegations.
Additional investigations or charges.
Where another person is injured, the harm caused can become an important sentencing consideration.
A driver should therefore never think that the worst possible consequence of exceeding the alcohol limit is simply being caught at a roadblock.
The most serious consequence may be causing irreversible harm to another person.
Can You Be Charged If You Are Below the Prescribed Limit?
Potentially, depending on the evidence and circumstances.
This goes back to the structure of Section 67.
The legislation does not only cover motorists who exceed the numerical prescribed limit.
It also addresses someone who is under the influence of alcohol to such an extent that he or she is incapable of having proper control of the vehicle.
Therefore, being below the numerical limit should not be interpreted as a guarantee that driving after consuming alcohol is always lawful.
This is another reason the safest approach is not to drink at all when you intend to drive.
Can You Refuse an Alcohol Breath Test?
A driver should not assume that refusing to provide a specimen is a way of avoiding legal consequences.
Singapore’s Road Traffic Act contains specific provisions governing alcohol testing and the provision of specimens.
Failing to provide a required specimen without reasonable excuse can itself have legal consequences.
Anyone facing an allegation concerning failure or refusal to provide a specimen should obtain legal advice regarding the specific facts and charge.
What If You Are Sitting in a Parked Car After Drinking?
Singapore law also separately addresses circumstances where a person is in charge of a motor vehicle while under the influence even though the person is not actually driving.
This means motorists should not assume that:
“The car wasn’t moving, so there can never be an offence.”
The legal position depends on the circumstances and the particular provision involved.
Where someone has been arrested or charged in circumstances involving a stationary vehicle, legal advice should be obtained based on the actual facts rather than assumptions from general articles online.
Why Is Singapore Reducing the Alcohol Limit?
The Government’s stated rationale is road safety.
The Ministry of Home Affairs explained that scientific evidence now demonstrates that even relatively low levels of alcohol can impair driving abilities.
These include:
Reaction time.
Judgement.
Concentration.
Decision-making.
Ability to respond safely to changing road conditions.
As alcohol concentration increases, impairment and the resulting risk to other road users also increase.
The new prescribed limits are intended to reflect the point at which the Government considers impairment and risk to road users unacceptable.
This represents a significantly stricter approach than the previous limits that had been in place since 1985.
The Alcohol Limit Is Not a Target
This is perhaps the most important point in the entire article.
The legal alcohol limit should never be treated as:
A recommended drinking level.
It is not:
A target.
It is not:
A guarantee of safe driving.
And it certainly does not mean:
“Drink until you are just below the limit.”
Someone trying to remain immediately below the legal threshold leaves virtually no margin for uncertainty.
More importantly, alcohol can impair driving before a person realises it.
The safest alcohol reading for someone intending to drive is therefore:
Zero.
Plan Your Journey Before You Start Drinking
One of the simplest ways to prevent drink driving is to decide how you will get home before drinking begins.
Singapore provides many alternatives.
Take public transport.
Book a taxi.
Use a private-hire vehicle.
Arrange for a designated sober driver.
Use a legitimate valet service where appropriate.
Leave your vehicle overnight.
Collect it the following day.
If you drove to a restaurant expecting not to drink but subsequently decided to have alcohol, change your transportation plans.
Your vehicle does not have to come home with you.
Leaving a car overnight may be inconvenient.
A drink-driving prosecution—or an accident—is considerably more serious.
Conclusion: What Is the Drink Driving Alcohol Limit in Singapore?
As of September 2026, Singapore’s Road Traffic Act currently states the prescribed alcohol limits as:
35 microgrammes of alcohol per 100 millilitres of breath
and
80 milligrammes of alcohol per 100 millilitres of blood.
However, the Road Traffic (Miscellaneous Amendments) Act 2026 has been passed and provides for these thresholds to be lowered to:
15 microgrammes of alcohol per 100 millilitres of breath
and
30 milligrammes of alcohol per 100 millilitres of blood.
Because this is a recent legislative change, anyone who needs to know the legally applicable threshold for a particular incident should check the current commencement status and the version of the Road Traffic Act applicable on that date.
Most importantly, motorists should not interpret either set of figures as permission to consume alcohol up to a particular level.
Singapore’s law can also address circumstances where a person is incapable of proper control because of alcohol, independently of exceeding the numerical prescribed limit.
There is therefore no recommended number of beers, glasses of wine, cocktails or spirits that someone should consume before driving.
If you plan to drive, do not drink. If you have been drinking, arrange another way home.
This article is intended to explain Singapore’s drink-driving alcohol limits and the seriousness of driving after consuming alcohol. It is not intended to teach motorists how much they can drink while attempting to remain below the legal threshold.
Disclaimer: This article is provided for general informational purposes only and does not constitute legal advice. Singapore’s prescribed alcohol limits are presently undergoing legislative change. Readers dealing with an actual incident should check the legislation in force on the relevant date or seek advice from a qualified Singapore lawyer.