Yes, you can refuse a field sobriety test in NC. Roadside field sobriety exercises are voluntary in North Carolina, and no state law imposes a license suspension or separate criminal charge for declining them. The catch is that drivers often confuse these voluntary roadside exercises with the post-arrest breath or blood test, which is a completely different situation with serious license consequences. Knowing which test is which is the whole game.
What a Field Sobriety Test Is
Standardized field sobriety tests are physical coordination exercises developed by the National Highway Traffic Safety Administration. There are three of them. The Horizontal Gaze Nystagmus, where the officer tracks your eye movement with a stimulus. The Walk-and-Turn, which asks for nine heel-to-toe steps along a line, a turn, and nine steps back. And the One-Leg Stand, roughly 30 seconds of balancing on one foot.1National Highway Traffic Safety Administration. DWI Detection and Standardized Field Sobriety Testing Participant Manual
Officers use these exercises to build probable cause for a DWI arrest. They are performed on the shoulder of the road, before any arrest has happened, and they are scored based on the officer’s observation of specific “clues.”
What Happens If You Refuse
No North Carolina statute requires you to perform field sobriety exercises. You can decline politely, and the Division of Motor Vehicles will not revoke your license for that refusal alone. There is no automatic penalty attached to saying no.
That does not mean the refusal is invisible. Two things follow from it.
First, the officer can still arrest you. If the officer smells alcohol, hears slurred speech, or watched you swerve or drift before the stop, those observations can supply probable cause on their own. Refusing the exercises does not force the officer to let you drive away.
Second, your refusal can be brought up at trial. North Carolina law makes the fact that you refused field sobriety tests admissible in criminal, civil, or administrative proceedings.2Justia Law. North Carolina Code 20-139.1 – Procedures Governing Chemical Analyses; Admissibility Prosecutors often argue to the jury that a refusal shows you knew you would fail. Whether that argument persuades depends on the case, but it is a factor a court may weigh.
So the honest picture: no license consequences, but the refusal is not a get-out-of-jail card either. It can figure in the criminal case that follows if you are arrested.
Don’t Confuse This With the Alcosensor
Between the voluntary field sobriety exercises and the post-arrest chemical test sits a third test that trips people up: the roadside preliminary breath screening, sometimes called the Alcosensor. Under G.S. 20-16.3, an officer can require you to blow into a handheld breath device at the roadside if the officer has reasonable grounds to believe you consumed alcohol and either committed a moving violation or were involved in a crash. The officer can also require it if there is reasonable suspicion of an implied-consent offense during a lawful stop, including a license checkpoint.3Justia Law. North Carolina Code 20-16.3 – Alcohol Screening Tests Required of Certain Drivers
Refusing the Alcosensor does not trigger the automatic license revocation that follows a post-arrest chemical test refusal. But the refusal is not free either. An officer or court can treat it as evidence supporting reasonable grounds that you committed a DWI offense, which makes it easier to justify arresting you.3Justia Law. North Carolina Code 20-16.3 – Alcohol Screening Tests Required of Certain Drivers
The screening results themselves have limited use in court. They can establish probable cause but generally cannot be introduced as direct evidence of your blood alcohol concentration at trial.3Justia Law. North Carolina Code 20-16.3 – Alcohol Screening Tests Required of Certain Drivers Submitting to the Alcosensor also does not substitute for the implied consent chemical test. If you are arrested, you will still be asked to take a separate chemical analysis at the station.
The Test That Actually Carries License Penalties
The test drivers should be careful about is the chemical test administered after arrest, usually a breath test at the station or a blood test at a hospital. That one is covered by North Carolina’s implied consent law under G.S. 20-16.2. By driving on a North Carolina highway or public vehicular area, you have already consented, in advance, to a chemical analysis if you are charged with an implied-consent offense such as DWI.4North Carolina General Assembly. North Carolina Code 20-16.2 – Implied Consent to Chemical Analysis
Before administering the chemical test, the officer must inform you of your rights orally and in writing. Those rights include notice that refusing will result in a one-year license revocation, that the officer can compel testing through other legal means, and that your refusal will be admissible at trial. You have the right to call an attorney and to have a witness present, though neither can delay the test more than 30 minutes after you are notified of your rights.5North Carolina General Assembly. North Carolina Code 20-16.2 – Implied Consent to Chemical Analysis
Refusing the post-arrest chemical test sets off two separate revocations that run back to back. First, an immediate 30-day civil revocation under G.S. 20-16.5.6North Carolina General Assembly. North Carolina Code 20-16.5 – Immediate Civil License Revocation for Certain Persons Charged With Implied-Consent Offenses Then a 12-month DMV revocation that takes effect on the 30th calendar day after the DMV mails the revocation order.4North Carolina General Assembly. North Carolina Code 20-16.2 – Implied Consent to Chemical Analysis You are looking at roughly 13 months without full driving privileges.
These are civil penalties that apply even if the DWI charge is later dismissed or you are acquitted at trial. The refusal itself is the trigger, not the outcome of the criminal case. On top of that, G.S. 20-139.1 makes the fact of a chemical test refusal admissible in any criminal, civil, or administrative proceeding, and prosecutors routinely argue that refusal signals consciousness of guilt.2Justia Law. North Carolina Code 20-139.1 – Procedures Governing Chemical Analyses; Admissibility
One more thing worth knowing: refusing the chemical test does not guarantee that officers walk away empty-handed. The implied consent statute warns that “an officer can compel you to be tested under other laws,” which in practice means a search warrant for a blood draw. If a judge grants it, hospital staff will draw blood whether you consent or not.4North Carolina General Assembly. North Carolina Code 20-16.2 – Implied Consent to Chemical Analysis
The Bottom Line for a NC Traffic Stop
Field sobriety tests: voluntary, no license penalty for refusing, but your refusal can come up at trial and will not prevent an arrest.
Roadside Alcosensor: refusing carries no automatic license revocation, but the refusal itself can support the officer’s decision to arrest you.
Post-arrest chemical test (breath at the station or blood at a hospital): refusing triggers an immediate 30-day revocation followed by a 12-month revocation, applies even if you are never convicted of DWI, and the refusal is admissible against you in court.
Drivers get in trouble when they treat all three tests as the same decision. They are not. Refusing the field sobriety exercises on the roadside is a very different act, with very different consequences, from refusing the chemical test after you have been arrested and read your implied consent rights.