Refusing a field sobriety test is legal in every state, and no state imposes an automatic license suspension, fine, or other administrative penalty for declining. The roadside walk-and-turn, one-leg stand, and eye-tracking exercises are voluntary. That doesn’t end the stop, though. The officer can still arrest you based on everything else observed during the encounter, and depending on where you are, a prosecutor may be allowed to tell a jury you refused. The bigger risk is confusing the roadside tests with the chemical test given after arrest, because those are not the same thing and the consequences for refusing them are not remotely the same.
What You’re Being Asked to Do
Field sobriety tests are three roadside exercises developed by the National Highway Traffic Safety Administration. The officer moves a pen across your field of vision and watches your eyes for involuntary jerking. You walk nine heel-to-toe steps along a line, turn, and walk back. You stand on one leg with the other foot six inches off the ground and count out loud. Each exercise is designed to divide your attention between a physical task and a mental one, which the agency says becomes harder when impaired.
The point of these tests, from the officer’s perspective, is to build probable cause for a DUI arrest. They are not a pass-or-fail scientific instrument, and you are not required to help assemble the case against you.
You Can Decline, and Here’s How
No state treats refusal of field sobriety tests as a violation of its implied consent law. There is no automatic suspension and no administrative fine for saying no. Officers are also not required to warn you that participation is optional, because courts have treated the physical exercises as non-testimonial, meaning Miranda rights don’t attach to them. The request can sound like a command. It isn’t one.
If you decide to decline, how you do it matters. Keep your hands visible. Stay calm. Say something short and respectful, along the lines of: “Officer, I respectfully decline to take any field tests.” Don’t lecture the officer about test accuracy. Don’t argue. Hand over your license and registration when asked. Being cooperative in every other respect while declining the exercises is what works in practice, because rudeness won’t change the legal result but it can shape the police report.
What the Officer Does Next
Declining doesn’t mean you drive away. The officer falls back on everything else available: your driving before the stop, the smell of alcohol, the way you spoke, bloodshot eyes, your coordination getting out of the car, any admissions about drinking, any open containers in sight. If those observations add up to probable cause, the officer will arrest you for suspected DUI whether or not you performed any roadside exercises.
Officers are trained to expect refusals and to document enough independent evidence to support the arrest without field sobriety results. Refusing takes one category off the table. It doesn’t erase the rest.
After arrest, you’ll be transported to a police station or similar facility and asked to submit to a chemical test of your breath, blood, or urine. This is where the stakes change.
Don’t Confuse the Roadside Test With the Chemical Test
This is the single most important distinction in a DUI stop, and getting it wrong is how people lose their licenses before they ever see a courtroom.
Field sobriety tests happen at the roadside, before arrest, and are voluntary with no administrative penalty for refusing. Chemical tests happen at the station, after arrest, and are governed by every state’s implied consent law. By holding a driver’s license and driving on public roads, you’ve already agreed to submit to chemical testing if lawfully arrested for impaired driving.1National Highway Traffic Safety Administration. BAC Test Refusal Penalties
Every state except one imposes separate penalties specifically for refusing that post-arrest chemical test.1National Highway Traffic Safety Administration. BAC Test Refusal Penalties The most common is an automatic administrative license suspension running from six months to a year for a first refusal, with some jurisdictions going longer. That suspension takes effect regardless of whether you’re ever convicted of DUI. It runs on its own administrative timeline, separate from any criminal case, and you generally have a short window, often measured in days rather than weeks, to request a hearing to challenge it. Miss that window and the suspension stands.
The Roadside Breath Device Is a Middle Category
Some officers carry a handheld breath-testing device and will ask you to blow into it before any arrest. That’s a preliminary breath test, and it is not the same as the formal chemical test at the station. For most drivers over 21 who are not on DUI probation, it’s treated like a field sobriety test: voluntary, no automatic license penalty for refusing, and the result is generally used only to help establish probable cause rather than as direct evidence of guilt at trial. Drivers under 21 and drivers on DUI probation face stricter rules in many states, and refusing where it’s required is typically a civil infraction with a fine. Rules vary by jurisdiction.
Can a Refusal Be Used Against You at Trial?
It depends on what you refused and where you are.
For a field sobriety test refusal, some jurisdictions let prosecutors tell the jury you declined and argue it shows “consciousness of guilt,” on the theory that the exercises aren’t testimonial and declining them doesn’t invoke Fifth Amendment protection. Other jurisdictions restrict or bar that argument. Even where prosecutors can raise it, they usually have to build the rest of their case on other evidence.
For a chemical test refusal, the picture is harsher. Roughly 48 states allow prosecutors to introduce the refusal as evidence at trial. Juries tend to draw their own conclusions when they hear a defendant refused a breath test after being arrested. Many states also enhance the criminal penalties when a DUI conviction is paired with a chemical test refusal, adding mandatory jail days, longer license revocations, or required treatment programs on top of the standard sentence.
Commercial Drivers Face Different Rules
If you hold a commercial driver’s license, federal regulations govern what happens when you refuse an alcohol test required under a state’s implied consent law, and the consequences are far more severe than for other drivers. A first refusal results in a one-year disqualification from operating a commercial vehicle. If you were hauling hazardous materials, it’s three years. A second refusal in a separate incident is a lifetime disqualification.2eCFR. 49 CFR 383.51 – Disqualification of Drivers
These disqualifications apply even if the refusal happened while you were driving your personal vehicle, because federal law ties the penalty to your CDL status, not to whatever you were behind the wheel of at the time. A state may reinstate a lifetime-disqualified driver after 10 years if the driver completes an approved rehabilitation program, but a qualifying offense after reinstatement bars any further reinstatement.2eCFR. 49 CFR 383.51 – Disqualification of Drivers For anyone whose work depends on the license, a chemical test refusal can end a career.
If You’ve Already Been Arrested
The most consequential step after an arrest involving any test refusal is requesting the administrative hearing within your state’s deadline. That hearing is often the only chance to challenge the license suspension before it becomes final, and the clock starts the moment you’re served with notice. The deadlines are short, and missing one typically means the suspension takes effect automatically regardless of what happens later in the criminal case.