Many drivers think refusing a breathalyzer is a clever way to dodge a DUI. In Ontario, that gamble usually fails. Same penalties as blowing over .08 — often worse.
This article breaks down the law, the real costs, and why “no” backfires. A Brampton DUI defence lawyer can step in to protect a driver’s rights.
What Is a Breathalyzer Demand Under Ontario Law?
Under Ontario law, a police officer doesn’t need much—just a solid reason to suspect drinking. Then they can demand a roadside breath sample on an Approved Screening Device. That is Criminal Code authority, not provincial.
Who Can Make a Breathalyzer Demand?
A police officer can lawfully demand a breath sample when:
- They observe signs of alcohol consumption (smell, slurred speech, glassy eyes)
- A driver has been involved in an accident
- The officer has reasonable suspicion based on the driver’s behavior
Reasonable suspicion — not proven impairment — is enough. Drivers are legally required to comply immediately once the demand is made.
What Happens If You Refuse a Breathalyzer in Ontario?
Refusing a lawful breathalyzer demand is a criminal offence. It does not matter if you were impaired. Saying no is what gets you charged.
Criminal Penalties for Refusal
Refusing a test hits the same as blowing over .08. Same penalties, no shortcut.
- First offence: at least $2,000 fine plus a one-year driving ban
- Second offence: minimum 30 days in jail and a two-year driving prohibition
- Third or more: at least 120 days behind bars and a three-year driving ban
Immediate Roadside Consequences
Refusing a breathalyzer also triggers automatic penalties under Ontario’s Highway Traffic Act — no trial needed:
- 90-day licence suspension, right away
- 7-day vehicle impoundment
- Admin fees and reinstatement costs
All of this happens at the roadside, before any court date.
Is Refusing Worse Than Failing?
In most situations, yes — or at minimum, equally damaging.
Same criminal penalties whether a driver fails or refuses. But refusal puts them in a worse position — here’s why.
You Lose the Ability to Challenge the Results
When a driver blows over, a lawyer can fight the reading — bad calibration, procedural mistakes, even the driver’s own biology. Refuse, and none of that matters. There is nothing left to argue.
Courts May View Refusal Negatively
While refusal alone is not direct evidence of impairment, it can be interpreted as an attempt to conceal evidence — which may influence sentencing if the case proceeds.
The Administrative Penalties Are Identical
Refusing a breathalyzer does not help at the roadside. You still get the 90-day license suspension and the 7-day impoundment — same as if you failed. So saying no buys you absolutely nothing there.
Common Myths About Breathalyzer Refusals
Several misconceptions lead drivers to believe refusal is a viable strategy. It is not.
Myth 1: Refusing protects you from a DUI charge.
Refusing does not prevent a charge. It changes the charge from impaired driving to refusal — which carries the same penalties.
Myth 2: You have the right to call a lawyer before blowing.
Ontario law requires immediate compliance with the roadside ASD demand. The right to counsel applies before the formal Approved Instrument test at the station — not the initial roadside demand.
Myth 3: Without a breath sample, the Crown has no case.
Wrong. A refusal charge only requires proof that a lawful demand was made and the driver did not comply. No breath sample is needed for a conviction.
Long-Term Consequences of a Refusal Conviction
A conviction for refusing a breathalyzer stays with you long after the court date:
- Criminal record – affects employment, housing, and licenses
- U.S. border trouble – Canada record often means denied entry
- Insurance hikes – higher premiums or dropped coverage
- Ignition interlock – mandatory for a long time once your license returns
And none of this depends on whether you were actually drunk at the time.
Charged With Refusal? Get Legal Help Immediately
There are legitimate defences to a breathalyzer refusal charge. These may include:
- The officer lacked reasonable grounds to make the demand
- The demand was not made in proper legal form
- The driver had a valid medical reason for refusing
- Charter violations related to the stop or detention
A good impaired driving lawyer in Brampton, such as GSP Law, knows how to pick apart a case. But they need to move fast. Evidence fades and deadlines slip by.
