If you refuse breathalyzer testing in Colorado, it triggers an automatic license revocation through the Express Consent law, separate from any criminal DUI case. The officer takes your license on the spot, you receive a temporary permit, and you must request a hearing within seven days to challenge the revocation.
Last Updated: October 1, 2026
That seven-day window is unforgiving. Miss it, and the revocation stands without a fight.
The confusion most drivers face starts at the traffic stop itself. Officers often ask for a "breath sample" before any arrest has occurred. What they rarely explain is that the first test is voluntary and the second is not. This guide from Law Offices of Robert E. Ray breaks down exactly what happens if you refuse breathalyzer Colorado 2026 procedures, from the roadside to the administrative hearing.
Under Colorado's Express Consent statute, Colorado Revised Statutes on expressed consent, any person who drives on public roads has already agreed to submit to chemical testing when lawfully arrested for DUI. Refusing that test is a statutory violation with its own penalty schedule, entirely distinct from the DUI charge itself.
The single most consequential fact in a refusal case is which test the officer is asking you to take. Colorado treats a roadside preliminary breath test (PBT) and a post-arrest evidentiary breath test as two completely different events with two completely different legal consequences, and most drivers never hear the distinction explained at the window.
A preliminary breath test (PBT) is a handheld screening device an officer uses before arrest to confirm or dispel a suspicion of alcohol. It is not the chemical test referenced by the Express Consent law. Under Colorado law, you are not penalized for declining a PBT, and declining it does not, by itself, trigger a license revocation. The officer may still arrest you based on other observations, odor of alcohol, field sobriety maneuvers, driving behavior, admissions, but the PBT refusal is not the trigger for the administrative case.
An evidentiary breath test is the formal chemical test conducted after a lawful DUI arrest, using an approved instrument at a station, mobile unit, or other designated location.
| Feature | Roadside PBT | Evidentiary Breath Test |
|---|---|---|
| When it happens | Before arrest, at the stop | After arrest, at station or mobile unit |
| Device type | Handheld screening device | Approved evidentiary instrument |
| Legal weight | Screening only; not the chemical test | The chemical test under Express Consent |
| Refusal penalty | No automatic license revocation | Automatic revocation via Express Consent |
| Can you decline? | Yes, without Express Consent consequences | Yes, but Express Consent penalties apply |
There is also a practical evidence angle. Because a PBT is a screening tool, its result is generally not the state's chemical-test evidence in the criminal case. The evidentiary test result, or the refusal of it, is what the prosecution and the DMV build around. That is why the choice at the station, not the choice at the window, is the one that shapes both the criminal DUI case and the administrative revocation.
Colorado's expressed consent law means your driver's license is conditioned on agreeing to chemical testing after a lawful DUI arrest. Refuse, and the state moves to revoke your driving privileges through an administrative process, not a criminal one.
The consequences stack quickly:
The DUI license revocation hearing is an administrative proceeding before a Colorado DMV hearing officer, not a criminal court, not a judge, and not a jury. It decides one narrow question: should the revocation stand? That narrow scope is exactly why preparation matters more here than most drivers expect.
This is the part most guides skip. The hearing officer is not deciding whether you are guilty of DUI. The officer is deciding whether the state met its burden on the elements the Express Consent law requires, typically that the officer had reasonable grounds to believe you were driving under the influence, that you were lawfully arrested, and that you refused the evidentiary test after being properly advised of the consequences. (Source: National Highway Traffic Safety Administration (NHTSA) data on DUI enforcement)
For anyone facing this process in Weld County, having counsel who understands how local hearing officers evaluate these cases changes the outcome. The Law Offices of Robert E. Ray has handled these proceedings since 1975 and knows where the paperwork typically breaks down.
Preparing for a Colorado DMV administrative hearing means building a documented challenge to the revocation within a compressed timeline. The hearing officer is not deciding your guilt. The officer is deciding whether the state followed its own rules.
Penalties for a refusal escalate with prior offenses. A first refusal carries a longer revocation than a first-time DUI conviction alone, and repeat refusals trigger the persistent drunk driver classification, which comes with mandatory interlock requirements and stricter reinstatement conditions.
A refusal in Colorado sets off two parallel legal problems at once, and the seven-day hearing deadline does not wait for you to sort out the criminal side. Drivers who treat the DMV notice as routine paperwork lose their license by default.
Refusing a breathalyzer is not a criminal offense by itself, but it triggers automatic administrative penalties under Colorado's Expressed Consent Law. Your driver's license can be revoked for one year for a first refusal. You can still be charged with DUI based on other evidence, such as field sobriety tests and officer observations. The refusal can also be used against you in court.
A first refusal results in a one-year license revocation. A second refusal leads to a two-year revocation, and a third refusal results in a three-year revocation. These are mandatory administrative penalties separate from any criminal DUI case. You may be eligible for early reinstatement with an ignition interlock device after serving part of the revocation period.
Colorado's Expressed Consent Law states that by driving on public roads, you automatically consent to chemical testing of your breath or blood if arrested for DUI. If you refuse, the DMV will revoke your license administratively. You have the right to request a hearing to challenge the revocation, but the refusal itself carries immediate consequences.
Yes, you can request a blood test, but the officer chooses which test to administer. If you refuse the officer's chosen test, it counts as a refusal under the Expressed Consent Law. You do not have the right to demand a specific test. Refusing any chemical test leads to the same administrative penalties.
Facing a refusal charge and unsure where to start? The Law Offices of Robert E. Ray has defended clients in Weld County courts since 1975, with bilingual services and a track record The Greeley Tribune has recognized for courtroom results. Contact the firm to review your DMV notice, protect your driving privileges, and build the strongest possible defense before your hearing date.