Call Us Now
Driving on Missouri roads constitutes implied agreement to submit to chemical testing, and refusal leads to an automatic one-year license revocation and can be used as evidence of guilt in court.
Understanding Missouri’s Implied Consent Statute
According to Missouri’s implied consent statute, when you opt to drive on state roads, you grant “implied agreement” to submit to alcohol tests if a law enforcement official reasonably suspects you are impaired. A refusal to submit to a breath, blood, or urine test after a reasonable request from police leads to a presumptive one-year license revocation.
What Chemical Tests Does the Law Apply To?
When a person applied for a driver’s license, they agreed to submit to chemical testing to assess their blood-alcohol concentration (BAC) if law enforcement officials requested it.
Chemical testing includes breath, blood, and urine testing:
- Breath Test: Can be administered anywhere.
- Blood and Urine Testing: Can only be done at a medical facility or a correctional facility, according to Missouri implied consent law.
Penalties for Refusing a BAC Test (Outside of Missouri)
The penalties for refusal to submit to a breathalyzer test vary by state, which may explain the considerable variation in statewide refusal rates. However, most jurisdictions impose an automatic six- or 12-month driver’s license suspension for refusing a BAC test. Suspensions typically increase for a refusal motorist with a history of DUI offenses and may include jail time. Your vehicle insurance company may cancel your policy if your license is suspended due to a refusal.
Immediate Consequences of Refusing a Breathalyzer in Missouri
A driver has the option to respectfully refuse a chemical test or a field sobriety test, but there are significant and immediate consequences. While you cannot be forcefully compelled to take a breathalyzer test without a warrant, police might arrest the driver for the crime of “Refusing a Breathalyzer Test.”
License Revocation (“Chemical Revocation”)
If you refuse to take the alcohol or chemical test when directed by a police officer, your Missouri driver’s license will be suspended for one year. This is formally referred to as a “Chemical Revocation.”
Drivers who ignore an officer’s authorized request to take a breath, blood test, or urine test face:
- One-Year License Suspension.
- Ignition Interlock Device (IID): If the driver has any past alcohol-related regulatory contacts (suspensions, revocations, or DWI convictions), the revocation will be followed by a six-month IID requirement.
To be eligible for restricted driving privileges throughout a refusal revocation, the driver must show documentation that all cars they plan to drive have an IID. Critically, these revocation and IID requirements are distinct from any criminal penalties imposed due to a DWI conviction and can be applied even if the DWI accusation is eventually dismissed.
Refusal Used as Evidence in Court
A driver’s refusal to consent to a test can be used against them at trial as proof of impairment. While rejection does not establish intoxication, prosecutors frequently claim that refusal indicates the accused was attempting to conceal intoxication. A driver can be convicted of DWI based on factors other than a chemical test, such as excessive BAC or being truly impaired.
Warranted Blood Draw
When a driver refuses to submit to testing, authorities can still obtain a warrant to draw blood. If a judge issues a warrant, the motorist no longer has the right to decline to test. If you were forcefully tested near Grandview, our lawyers in Grandview, MO, are prepared to seek justice for your case!
How a Defense Attorney Challenges a Refusal Case
If a driver refuses to take a breath test, a defense attorney will address key issues, including:
- Did the accused have a lawful reason to refuse?
- Did the police have a right or grounds to demand a breathalyzer test?
- Did the accused fail to provide the breath test to the police officer without lawful authority?
- Did the accused understand the implications of refusing the test?
Your defense attorney will try to get any sanctions for this reduced, but the punishment for refusing the test is the same as if the driver took and failed the test.
E-E-A-T Spotlight: Why Benjamin Law Firm is uniquely qualified to fight refusal cases
As an attorney who has favorably resolved countless DWI cases and is known among peers as an expert DWI and criminal defense lawyer, Kim Benjamin brings unparalleled experience to implied consent cases. Her specialized knowledge is recognized nationally; she is a Regent and Faculty member at the National College for DUI Defense (NCDD) and chairs the Missouri Bar’s Bernard Edelman DWI Law & Science Seminar.
Refusal cases can be complex, involving both administrative license revocation and criminal proceedings. Because the entire legal team is trained in the Trial Lawyers College (TLC) methods, The Benjamin Law Firm, LLC is focused on being the best at criminal and DWI defense to fight for your rights when the government comes after you.
If you were accused of driving while intoxicated in Missouri, the best course of action is to hire a lawyer from a respected law firm. At the Benjamin Law Firm, LLC, you can get the help of an experienced attorney to aid you in your case and fight for your rights!
Our trusted lawyers in Kansas City have favorably resolved countless DWI cases. Contact our law firm at 816-846-2219 right away for a consultation on your case, or send us a secure email.
This post was last updated on December 8, 2025.
