Michigan’s Implied Consent Law: How Chemical Test Refusal Actually Works
Michigan’s Implied Consent Law: How Chemical Test Refusal Actually Works
Michigan’s implied consent law — and the chemical test refusal Michigan drivers face — is one of the most misunderstood parts of the whole drunk driving legal scheme. Most drivers have heard the term, but far fewer understand exactly what it requires, when it applies, or what set of consequences follows from a refusal. This article untangles the statute.
One clarification up front: this article is about the legal framework of implied consent and what happens procedurally when someone refuses a post-arrest chemical (breath or blood) test. If you already refused and are trying to figure out what to do right now — what you need to submit, what deadline is coming, and whether there is a way to preserve your driving privileges — that is covered in a separate piece: What If I Refused the Breath or Blood Test? Here’s What Happens Next. Read that one first if you’re in the middle of this situation. Come back here when you want to understand the law behind it.
What “Implied Consent” Actually Means
The phrase certainly has a kind of technical, legal ring to it, but the concept is straightforward. The way the law works is that anyone who operates a vehicle on a public road in Michigan is treated as having already consented — in advance — to submit to a chemical test if a law enforcement officer has probable cause to believe that person was operating while intoxicated.
The consent is called “implied” because it is never written down and no one asks for it explicitly. It arises automatically from the act of driving on a Michigan road. When a driver accepts a Michigan license — or drives in Michigan on an out-of-state license — the law treats that driver as having agreed to this condition. The statute is found at MCL 257.625c, and it has been part of Michigan’s drunk driving law for decades.
This is basic stuff that’s typically covered in driver’s education. Whether a particular driver remembers it is legally irrelevant. This is one of those places where the old saying that ignorance of the law is no excuse really hits home. A driver who has never heard or doesn’t understand the term “implied consent” is still bound by it.
Two Tests, Two Different Legal Frameworks
A common source of confusion is that there are actually two different breath tests in a Michigan DUI case, and implied consent applies only to one of them.
The PBT: Roadside, Before Arrest
The preliminary breath test (PBT) is the handheld device offered at the side of the road, or sometimes in the back of a police car, before any arrest has been made. The purpose of the PBT is to help give the officer a basis for determining whether there is probable cause to make an arrest. Refusing a PBT is a civil infraction in Michigan. It carries a fine. It does not carry a license suspension, and it does not trigger implied consent consequences.
The Post-Arrest Chemical Test Refusal in Michigan
The post-arrest chemical test is the test given after an arrest has been made. This is either the breath test administered on the Intoxilyzer 9000 at a police station or other facility, or a blood draw. This is the test that implied consent law governs. When someone refuses this test, that is a chemical test refusal in Michigan — a legally significant event with its own separate consequences, independent of the underlying OWI charge.
The distinction matters because the two tests serve different purposes, happen at different points in the process, and carry entirely different consequences for refusal. The term “refusal” is the only similarity between them, as they are very distinct from each other.
What the Law Requires When a Driver Is Asked to Test
Under MCL 257.625c, before requesting a chemical test, the arresting officer is required to advise the driver of certain rights and consequences. This is not optional; it is a prerequisite to a valid implied consent proceeding. Specifically, the officer must read the following from the DI-177 form:
CHEMICAL TEST RIGHTS
Read the rights that follow in their entirety.
I am requesting that you take a chemical test to check for alcohol and/or controlled substances or other intoxicating substances in your body. IF YOU WERE ASKED TO TAKE OR TOOK A PRELIMINARY BREATH TEST BEFORE YOUR ARREST, YOU MUST STILL TAKE THE TEST I AM OFFERING YOU.
If you refuse to take this chemical test, it will not be given without a court order, but I may seek to obtain such a court order. Your refusal to take this test shall result in the suspension of your operator’s or chauffeur’s license and vehicle group designation or operating privilege, and the addition of six points to your driving record.
After taking my chemical test, you have a right to demand that a person of your own choosing administer a breath, blood, or urine test. You will be given a reasonable opportunity for such a test. You are responsible for obtaining a chemical analysis of a test sample taken by a person of your own choosing.
The results of both chemical tests shall be admissible in a judicial proceeding, and will be considered with other admissible evidence in determining your innocence or guilt.
Will you take a: (Select the appropriate test from the following list)
Breath Test? or Blood Test? or Urine Test?
*MCL 257.625c(2) provides that a person afflicted with hemophilia, diabetes, or a condition requiring the use of an anticoagulant shall not be considered to have given consent to the withdrawal of blood.
Whether the officer properly did that is one of the primary grounds for challenging a chemical test refusal in Michigan at an implied consent hearing. If the reading of those rights was incomplete, inaccurate, or not given at all, a hearing officer is required to find in the driver’s favor.
What Happens After a Chemical Test Refusal in Michigan
A refusal triggers a separate, civil proceeding that runs on a parallel track alongside any criminal OWI charge. It is entirely possible for a driver to have an OWI charge dismissed and still lose driving privileges because of the implied consent refusal. The two matters are completely independent of each other.
The Officer’s Report: Documenting the Chemical Test Refusal
At the time of refusal, the officer completes a form called the “Officer’s Report of Refusal to Submit to Chemical Test.” This form is given to the person and serves, temporarily, as a paper driver’s license. The driver’s actual license is confiscated. The paper document notifies the driver of the right to request a hearing, the deadline for that request, and the consequences of failing to act.
The 14-Day Deadline
This deadline is critical. A driver who wants to contest the implied consent suspension must request a hearing within 14 days of receiving the Officer’s Report of Refusal form. If no request is made within that window, the Secretary of State automatically suspends the driver’s license for one year. There is no grace period and no administrative mechanism for late requests. The 14-day clock starts running the moment the form is issued.
License Consequences
Under MCL 257.625d, if the refusal is sustained — either because no hearing was requested or because the hearing officer finds in favor of the officer — the Secretary of State imposes the following:
- First refusal: one-year license suspension and six points added to the driving record.
- Second refusal within seven years: two-year license suspension and six points.
These suspensions are in addition to any license consequences that arise from the underlying OWI charge. A driver who is ultimately convicted of OWI will face a separate set of license sanctions on top of the implied consent suspension.
The Implied Consent Hearing: Contesting a Chemical Test Refusal in Michigan
A driver who timely requests a hearing receives a hearing before a Secretary of State hearing officer. The scope of the hearing is narrow. Under MCL 257.625f, only four issues may be raised:
- Whether the officer had reasonable grounds to believe the driver was operating under the influence of alcohol or drugs;
- Whether the driver was arrested;
- Whether the driver was properly advised of the implied consent rights; and
- Whether the driver refused the test.
If the officer cannot establish all four of those elements, or if the driver establishes that any one of them is not satisfied, the hearing officer must set aside the refusal. If the officer establishes all four and no valid defense applies, the suspension is imposed.
The hearing is administrative, not criminal. The rules of evidence are relaxed. The officer’s report and testimony carry significant weight. However, inconsistencies between the report and any dash or body camera footage, failure to properly advise a person of their chemical test rights, or a legitimate medical or physical reason for the refusal can all be grounds for a favorable outcome.
The License Before the Hearing Decision
During the period between the refusal and the hearing decision, the driver still has whatever kind of license they had before the DUI arrest. Of course, that status may change as a result of either or both the implied consent hearing decision or any conviction for a DUI.
When the Suspension Stands: Petitioning the Circuit Court
Whether a driver missed the 14-day deadline entirely, chose not to request a hearing, or requested a hearing and lost, the story does not necessarily end there. Michigan law provides a separate avenue for relief: a petition filed in the circuit court for the county where the driver lives.
This is what is commonly called a “hardship” petition. The practical outcome, if the petition is granted, is a restricted license — meaning the ability to drive for limited purposes such as work, medical appointments, and other essential activities — rather than a complete suspension with no legal ability to drive at all. Different circuit courts have slightly different procedures for handling these petitions, but the availability of relief is consistent across the state.
This matters for one reason above all others: a driver facing a one-year implied consent suspension is not automatically stuck with a year of no driving. Relief exists. The circuit court process is available regardless of what happened — or did not happen — at the Secretary of State level.
It is also worth emphasizing, again, that this is entirely separate from any license sanction imposed as the result of a DUI conviction. The implied consent suspension and any OWI-related license action are parallel proceedings. A circuit court petition addresses only the implied consent piece.
The Refusal as Evidence in the Criminal Case
A chemical test refusal in Michigan is admissible as evidence in the underlying OWI case. Under MCL 257.625a and related caselaw, a prosecutor may argue to a jury that a defendant’s refusal to test is circumstantial evidence of consciousness of guilt — that the defendant refused because they knew the test would show they were over the limit.
This is worth understanding clearly. A driver who refuses the chemical test avoids producing a breath or blood result that shows a specific BAC. But the refusal itself becomes a piece of evidence that the prosecution can use. Courts have consistently held that this does not violate the Fifth Amendment, because submitting to a chemical test is a physical act, not a testimonial one.
The simple truth is that a chemical test refusal in Michigan is almost never strategically beneficial in all but the rarest of DUI cases. As a general matter, our firm’s position — and the position we explain to every client who calls with this question — is that refusing is almost never worth it. The penalties for refusing are certain and immediate. The potential benefit is highly unlikely, at best, as will be explained in the next section.
What Actually Happens When Someone Refuses: The Warrant
There is a widespread assumption that refusing the chemical test means law enforcement will have no test result to use. In practice, that is rarely true.
When a driver refuses, the arresting officer in almost every Michigan DUI case will apply for a search warrant authorizing a blood draw. Warrant applications in these circumstances are routinely approved. The blood draw is then performed, typically at a hospital, medical center, or jail facility. The result is available to the prosecution the same as any other chemical test result would have been.
It is almost a certainty that here, in the Greater Detroit area, a chemical test refusal in Michigan will quickly result in a warrant for a blood draw. Exceptions are genuinely rare. Refusal, in other words, typically does not prevent a test result from existing — it just delays it, adds procedural complexity, and layers on the implied consent license consequences in the meantime.
What You Need to Know
- Implied consent is created by law, not by any document you signed.
- It applies only to the post-arrest chemical test — not the roadside PBT.
- A chemical test refusal in Michigan triggers a one-year license suspension, independent of the criminal case.
- A hearing must be requested within 14 days or the suspension becomes automatic.
- The hearing is limited to four issues; the scope is narrow.
- Refusal is admissible as evidence of guilt in the OWI case.
- In nearly all cases, the officer will obtain a search warrant for a blood draw anyway.
- Even if the suspension stands, a circuit court petition for a restricted license is available.
If You’ve Already Refused
If the refusal has already happened and the question now is what to do about it, that is covered separately in What If I Refused the Breath or Blood Test? Here’s What Happens Next. That article walks through the practical steps — the form, the deadline, what requesting a hearing involves, and what the outcome can look like. The two pieces are designed to work together: this one on the legal framework, that one on what to actually do.
Our firm represents clients in implied consent hearings and circuit court hardship petitions (where we have, to-date, a 100% success rate) across Wayne, Oakland, and Macomb, and the surrounding counties. If a refusal has already occurred, getting a lawyer involved before the hearing — not after — is the most important thing to do. Call us at 586-465-1980 for a free, confidential phone consultation. We’re available Monday through Friday, 8:30 a.m. to 5:00 p.m., with an after-hours answering service. You can also reach us through the contact form or chat box on our website. For more information about how we defend DUI cases, visit our Michigan DUI defense page.