If you intend to consume alcohol and drive in Singapore, one of the most commonly searched questions is:
“What is the drink driving alcohol limit in Singapore?”
As of September 2026, the prescribed alcohol limits currently stated in Singapore’s Road Traffic Act are:
Breath: 35 microgrammes of alcohol per 100 millilitres of breath
Blood: 80 milligrammes of alcohol per 100 millilitres of blood
These are the prescribed limits currently appearing in Section 72 of the Road Traffic Act 1961.
However, there is an important development in 2026.
Singapore has passed the Road Traffic (Miscellaneous Amendments) Act 2026, which provides for these limits to be substantially reduced to:
Breath: 15 microgrammes of alcohol per 100 millilitres of breath
Blood: 30 milligrammes of alcohol per 100 millilitres of blood
The amendment was published on 8 September 2026. As of the time of writing, however, the current consolidated Road Traffic Act still states the existing 35 µg/100 ml breath and 80 mg/100 ml blood limits.
Motorists should therefore pay close attention to when the new limits come into force.
More importantly, neither the existing nor incoming limit should be treated as a target for how much alcohol someone can safely consume before driving.
Singapore’s road-safety message remains much simpler:
If you drink, don’t drive.
What Is the Current Drink Driving Limit in Singapore?
Under the Road Traffic Act currently in force, the prescribed limit is:
Breath Alcohol Limit
35 microgrammes of alcohol in 100 millilitres of breath.
This is the figure commonly associated with breathalyser testing and drink-driving prosecutions in Singapore.
Blood Alcohol Limit
80 milligrammes of alcohol in 100 millilitres of blood.
The Road Traffic Act expressly defines both figures as the “prescribed limit”.
These limits have historically been used when determining whether a motorist has exceeded the prescribed alcohol concentration for the purposes of Singapore’s drink-driving legislation.
However, they are now scheduled to be tightened following legislative changes passed in 2026.
Singapore Is Lowering Its Drink Driving Alcohol Limit
This is particularly important for anyone reading older articles about Singapore’s alcohol limit.
The Road Traffic (Miscellaneous Amendments) Act 2026 provides for the prescribed limits to change from:
35 µg to 15 µg per 100 ml of breath
and
80 mg to 30 mg per 100 ml of blood.
The Ministry of Home Affairs explained during the Bill’s second reading that the existing prescribed limits had been in place since 1985.
MHA said scientific understanding of alcohol impairment has advanced considerably and that evidence indicates even relatively low levels of alcohol can impair reaction time, judgement, concentration and a driver’s ability to respond safely.
The change therefore represents a significant tightening of Singapore’s approach to drinking and driving.
Current Limit vs New Limit
For clarity:
| Measurement | Current prescribed limit | New legislated limit |
|---|---|---|
| Breath | 35 µg/100 ml | 15 µg/100 ml |
| Blood | 80 mg/100 ml | 30 mg/100 ml |
Motorists should check the latest legislation because the commencement of the new provisions determines when the lower limits legally replace the current limits.
This is particularly important because articles written before 2026 may continue to state only the 35/80 figures without mentioning the new legislation.
Does Being Below the Alcohol Limit Automatically Mean You Can Drive?
This is one of the most important misconceptions surrounding drink driving in Singapore.
No.
Being below the prescribed alcohol limit does not necessarily mean that a person cannot commit a drink-driving offence.
Section 67 of the Road Traffic Act contains two alternative bases relevant to drink driving.
A person can commit an offence if, while driving or attempting to drive on a road or other public place, the person is under the influence of alcohol to such an extent as to be incapable of having proper control of the vehicle.
Alternatively, an offence can arise where the proportion of alcohol in the person’s breath or blood exceeds the prescribed limit.
This distinction is extremely important.
A driver should therefore never think:
“As long as I am below 35 microgrammes, I am definitely legal to drive.”
That is too simplistic.
Singapore Police’s road-safety materials likewise explain that a person may be charged even when the blood or breath alcohol level is below the prescribed limit if there is evidence showing that the person was unable to control the vehicle because of alcohol intoxication.
How Many Drinks Can You Have Before Driving in Singapore?
There is no responsible universal answer.
You should not attempt to convert Singapore’s legal alcohol limit into:
“One beer.”
“Two glasses of wine.”
“Three shots.”
“One cocktail.”
The relationship between the number of drinks consumed and a person’s eventual alcohol concentration is not sufficiently predictable for this to be treated as a safe driving formula.
Alcohol concentration can be affected by numerous individual circumstances.
Even two people consuming apparently similar amounts of alcohol may not produce identical readings.
The type of drink also matters.
A “glass” is not a standard scientific measurement of alcohol intake. One establishment’s cocktail may contain substantially more alcohol than another establishment’s version of the same drink.
Therefore, trying to calculate:
“How many drinks can I have while remaining under the limit?”
is the wrong approach to road safety.
The safer decision is to separate drinking and driving completely.
What About One Beer?
Another common question is:
“Can I drive after one beer in Singapore?”
There is no universal yes-or-no answer based solely on the number of beers.
One beer does not necessarily produce the same alcohol concentration in every person.
Beer also varies significantly in alcohol content and serving size.
More importantly, the Road Traffic Act does not create a general rule saying that every motorist is legally permitted to consume one beer before driving.
A driver may potentially be affected by alcohol even before reaching the prescribed numerical limit.
With Singapore having legislated for a significantly lower prescribed limit, attempting to calculate a supposedly “safe number of beers” becomes even less sensible.
If you know that you need to drive, the safest option is not to consume alcohol.
What About One Glass of Wine?
The same principle applies to wine.
A person should not assume:
“One glass of wine is definitely safe.”
The amount of alcohol contained in a glass depends on the volume poured and the alcohol concentration of the wine.
A generous restaurant pour and a smaller serving at another establishment are not necessarily equivalent.
Individual alcohol absorption also differs.
The law is concerned with the alcohol concentration in the driver’s body and whether the driver is capable of proper control—not simply the number of glasses ordered.
What About Drinking Several Hours Before Driving?
Time is relevant to how the body processes alcohol, but motorists should be extremely cautious about relying on online formulas.
Someone may think:
“I stopped drinking two hours ago, so I should be fine.”
That is not necessarily correct.
Alcohol does not instantly disappear from the body when someone stops drinking.
A person may also misremember how much was consumed, underestimate the strength of drinks or misunderstand how alcohol is being metabolised.
Therefore, there should not be a universal rule such as:
“Wait X hours after X drinks and you can definitely drive.”
That could create a false sense of security.
Where there is genuine uncertainty, the safest decision is not to drive.
Can You Still Be Over the Limit the Morning After Drinking?
Potentially, yes.
The phrase “morning after” can create another dangerous misconception.
Sleeping does not automatically guarantee that all alcohol has disappeared from the body.
A person who consumed a significant quantity of alcohol late at night could potentially still have alcohol in the body the following morning.
Feeling sober is also not the same as objectively establishing an alcohol concentration.
Therefore, someone who drank heavily the previous night should not automatically assume that waking up means he or she is ready to drive.
Again, there is no universally reliable number of sleeping hours that guarantees every individual will be below the prescribed limit.
How Does Singapore Police Test for Alcohol?
Singapore’s Road Traffic Act contains provisions allowing breath testing in relevant circumstances.
A breath analysing device assesses whether alcohol is present in a person’s breath and, where alcohol is present, its concentration. The legislation defines a breath test by reference to a device approved by the Deputy Commissioner of Police.
Police regularly conduct enforcement operations against drink driving.
For example, during an island-wide operation in December 2025, Traffic Police stopped 88 motorists for alcohol testing, and 10 people were arrested specifically for drink-driving offences. The highest evidential breath reading reported in that operation was 73 microgrammes per 100 millilitres of breath—more than twice the then-current 35-microgramme prescribed limit.
Roadblocks should not be viewed as the only circumstances in which drink driving can be detected.
An investigation can also arise following an accident, observed driving behaviour or other circumstances giving police lawful grounds to investigate.
What Happens If You Exceed the Alcohol Limit?
Exceeding the prescribed limit while driving or attempting to drive can constitute an offence under Section 67 of the Road Traffic Act.
Drink driving is not simply an ordinary traffic ticket.
For a first conviction, Section 67 currently provides for:
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 is also an important consequence of a conviction.
Therefore, motorists should not view exceeding the limit as something that merely results in a few demerit points.
Is 36 Microgrammes Over the Limit?
Under the prescribed breath limit currently appearing in the Road Traffic Act, 35 microgrammes of alcohol per 100 millilitres of breath is the prescribed limit, and Section 67 refers to a proportion that exceeds that prescribed limit.
However, motorists need to be especially careful with examples like this in 2026 because Singapore has already legislated to reduce the limit to 15 microgrammes.
The appropriate limit is the one legally in force at the relevant time.
Furthermore, focusing on whether someone can remain just one unit below a statutory threshold misses the road-safety issue.
Alcohol impairment can occur before a person reaches a particular numerical threshold.
Why Is Singapore Lowering the Alcohol Limit?
Singapore’s decision reflects a more cautious approach towards alcohol impairment.
During the second reading of the 2026 amendments, the Ministry of Home Affairs explained that scientific evidence shows even low alcohol concentrations can affect a driver’s:
Reaction time.
Judgement.
Concentration.
Ability to respond safely to changing road conditions.
MHA stated that the new limits represent the point at which impairment—and therefore unacceptable risk to other road users—begins.
The incoming change from 35 to 15 microgrammes for breath represents a substantial reduction.
It sends a clear policy message that motorists should not attempt to drink close to the legal threshold and then drive.
Can You Be Charged Even Without an Accident?
Yes.
An accident is not required for a Section 67 drink-driving offence.
A driver can be stopped before any collision occurs and still be investigated and prosecuted where the legal requirements are satisfied.
This is important because some motorists incorrectly associate drink driving exclusively with accidents.
Drink-driving legislation is intended partly to prevent accidents from happening in the first place.
A motorist stopped before causing an accident should consider himself or herself fortunate that nobody was hurt—not conclude that the conduct was harmless.
What If You Are Over the Limit but Parked?
The law distinguishes between driving or attempting to drive and being in charge of a motor vehicle while under the influence.
Section 68 separately addresses a person who is in charge of a motor vehicle on a road or other public place but is not driving it while unfit through drink or with alcohol exceeding the prescribed limit.
The legal position can therefore be more complicated than simply asking whether the vehicle was moving at the moment police approached.
Anyone facing such a charge should obtain advice based on the actual facts rather than relying on a general internet article.
Can You Refuse a Breathalyser Test?
A motorist should not assume that refusing to provide a specimen is a simple way of avoiding a drink-driving charge.
Singapore’s Road Traffic Act separately regulates breath testing and contains offences concerning failure to provide specimens without reasonable excuse.
The law also gives police powers relating to arrest and testing in specified circumstances.
Someone facing an allegation of failing or refusing to provide a specimen should obtain legal advice about the particular charge and circumstances.
Why “I Feel Sober” Is Not a Reliable Test
Alcohol impairment can be deceptive.
A person who has been drinking may genuinely believe that his or her driving ability is normal.
But personal confidence is not an objective alcohol measurement.
More importantly, alcohol itself can affect judgement.
That creates an obvious problem:
The substance that may impair someone’s ability to drive can also impair that person’s ability to judge whether he or she should drive.
This is another reason why planning transport before drinking begins is safer than deciding whether to drive at the end of the evening.
Plan Your Transport Before You Drink
Singapore offers numerous alternatives to drink driving.
A person attending a dinner, celebration, wedding, corporate event or night out can:
Take public transport.
Book a taxi.
Use a private-hire vehicle.
Arrange a designated sober driver.
Use a legitimate valet service.
Stay nearby overnight.
Leave the vehicle behind and retrieve it the following day.
Planning beforehand eliminates the temptation to make calculations after consuming alcohol.
Instead of asking:
“Am I probably under the limit?”
the decision has already been made:
“I am drinking tonight, therefore I am not driving.”
That is substantially safer.
Do Not Treat the Alcohol Limit as a Drinking Allowance
Perhaps the most important lesson from Singapore’s drink-driving laws is that the prescribed alcohol limit should not be interpreted as permission to drink up to that amount.
It is a legal threshold.
It is not a recommendation.
It is not a target.
It is not a guide to the number of drinks that can safely be consumed.
And importantly, Section 67 also addresses situations where a driver is under the influence of alcohol to such an extent as to be incapable of proper control, independently of the prescribed-limit limb of the offence.
The safest alcohol concentration for someone who intends to drive is therefore straightforward:
Zero.
Conclusion: What Is the Drink Driving Alcohol Limit in Singapore?
As of September 2026, the prescribed limits currently appearing in Singapore’s Road Traffic Act are:
35 microgrammes of alcohol per 100 millilitres of breath
and
80 milligrammes of alcohol per 100 millilitres of blood.
However, Singapore has passed legislation in 2026 to substantially reduce these thresholds to:
15 microgrammes of alcohol per 100 millilitres of breath
and
30 milligrammes of alcohol per 100 millilitres of blood.
Because the legislation has recently changed, motorists and publishers should check the current version of the Road Traffic Act to determine when the lower prescribed limits have come into force.
More importantly, the alcohol limit should never be treated as a target for calculating how many drinks a person can consume before driving.
A motorist can also potentially commit an offence where alcohol has rendered him or her incapable of proper control of the vehicle, even if the numerical prescribed-limit limb is not established.
For that reason, there is no sensible “safe number” of beers, wines or spirits that this article recommends before driving.
The safest rule is considerably easier to remember:
If you drink, don’t drive.
Arrange another way home, leave the car behind and collect it later.
This article is intended to explain Singapore’s drink-driving alcohol limits and the seriousness of the law. It is not intended to teach motorists how much alcohol they can consume while attempting to remain below the legal limit.
Disclaimer: This article is provided for general informational purposes only and does not constitute legal advice. This topic is particularly time-sensitive because Singapore passed legislation in September 2026 to lower the prescribed alcohol limits. Readers should check the latest commencement status and current Road Traffic Act or obtain professional legal advice where the applicable limit is material to a particular case.