Can You Refuse a Breathalyzer in Wisconsin? Know Your Rights

If you are pulled over on suspicion of Operating While Intoxicated (OWI) in Wisconsin, an officer may ask you to submit to chemical testing. Many drivers wonder whether they have the right to refuse — and what happens if they do.

The answer depends on when the request is made and what type of test is being requested. Wisconsin’s implied consent law creates different consequences depending on the stage of the investigation.

Understanding Wisconsin’s Implied Consent Law

Wisconsin operates under an Implied Consent Law, found in Wis. Stat. § 343.305. By operating a motor vehicle on Wisconsin roadways, drivers are deemed to have consented to chemical testing if law enforcement has probable cause to believe they committed an OWI offense.

Implied consent applies to:

• Breath tests

• Blood tests

• Urine tests

However, the law applies only after a lawful arrest for OWI. The timing of the request matters.

Can You Refuse a Roadside Breath Test in Wisconsin?

Yes.

A roadside Preliminary Breath Test (PBT) is typically administered before arrest to help an officer establish probable cause. Under Wisconsin law, drivers may refuse a PBT without triggering an automatic license revocation under the implied consent statute.

However, refusal does not prevent arrest. An officer may still arrest you based on:

• Driving behavior

• Field sobriety tests

• Physical observations

• Statements made during the stop

Refusing a PBT may increase the likelihood that the officer proceeds with arrest and requests evidentiary testing.

Can You Refuse Chemical Testing After Arrest?

You can physically refuse - but there are consequences.

Once you are lawfully arrested for OWI and read the Informing the Accused form, refusal to submit to an evidentiary chemical test triggers penalties under Wisconsin’s implied consent law.

For a first refusal, consequences typically include:

• One-year driver’s license revocation

• Mandatory alcohol assessment

• Possible requirement: installation of ignition interlock device

• A separate civil refusal proceeding

The refusal is separate from the OWI charge itself and results in an independent administrative case.

What Happens After a Refusal?

1. Administrative Revocation

For a first refusal, license revocation is generally one year. Subsequent refusals carry longer revocation periods.

You have the right to request a refusal hearing, but strict deadlines apply.

2. Ignition Interlock Device (IID)

If you are later convicted of OWI and your BAC would have required an IID, installation may still be ordered. In some cases, refusal can result in IID requirements even without a high BAC reading.

3. Refusal as Evidence in Court

Prosecutors are permitted to argue that refusal demonstrates consciousness of guilt. While refusal is not an automatic admission of guilt, it can be introduced at trial.

Is Refusing a Breath Test Ever Strategic?

In most cases, refusal creates significant additional consequences.

Refusal guarantees a revocation period, even if the underlying OWI charge is later reduced or dismissed. It also removes the possibility of knowing your BAC level, which can complicate defense strategy.

There may be limited scenarios where refusal becomes part of a broader legal strategy, but that determination should be made with legal counsel — not during a roadside encounter.

For most drivers, the legal consequences of refusal can be substantial.

Can You Challenge a Breath or Blood Test?

Yes. Even if you submitted to testing, results may be challenged through:

Challenging the Traffic Stop

If the initial stop lacked reasonable suspicion, evidence may be suppressed.

Challenging Probable Cause for Arrest

If probable cause was insufficient, subsequent testing may be inadmissible.

Challenging Machine Accuracy

Evidentiary breath machines must be properly maintained and calibrated.

Challenging Blood Draw Procedures

Improper handling, storage, or chain-of-custody issues may affect reliability.

Each case depends heavily on its specific facts.

What Should You Do If You Are Arrested for OWI?

If you are arrested:

• Remain calm and respectful.

• Avoid making statements about alcohol consumption.

• Pay attention to what the officer reads to you.

• Contact an experienced OWI attorney immediately.

Time-sensitive administrative deadlines apply after arrest.

Know Your Rights Before You Need Them

While it is legally possible to refuse chemical testing in Wisconsin, refusal carries automatic administrative consequences that are often severe.

Because the State of Wisconsin — not the arresting officer — prosecutes OWI cases, the matter will proceed unless successfully challenged through the court process.

If you have been charged with OWI or cited for refusal in Janesville, Rock County, or elsewhere in Wisconsin, contact Gerard Law Firm to review your case and protect your driving privileges.

This article is for informational purposes only and is not legal advice. Reading this article does not create an attorney-client relationship. State and federal laws change frequently. This article reflects Wisconsin law as of the “Published” or “Last Updated” date listed above. Legal outcomes depend on specific facts. Consult a qualified attorney regarding your specific situation.