DUI Defense
Short answer: a Tennessee DUI arrest opens two cases. The criminal charge is decided in court; your license is decided at the Department of Safety on a deadline measured in days from the notice of revocation. Refusing the test has its own revocation under the implied-consent law, a conviction brings a one-year revocation on a first offense, and getting back on the road usually means a restricted license with an ignition interlock.
This page is the detail behind our Memphis DUI lawyer page, on the license side of a DUI arrest. Call (901) 324-5000, or call or text the criminal line at 901-412-2973, any time. Se habla español.
Implied Consent and License Revocation
When you applied for your Tennessee driver’s license, you consented in advance to chemical testing of your blood or breath any time a law enforcement officer has reasonable grounds to believe you are driving under the influence. This is Tennessee’s implied consent law, codified at T.C.A. § 55-10-406.
Consequences of Refusal
Refusing a lawful chemical test carries its own penalties, separate from the DUI charge itself:
- First refusal: 18-month license revocation for refusals on or after January 1, 2026 (1 year for earlier refusals).
- Second refusal (or first refusal with a prior DUI): 2-year revocation.
- Refusal with a prior vehicular assault or homicide conviction: 5-year revocation.
- Refusal when a passenger is under 16, or when a crash caused injury or death: The officer is statutorily required to obtain a blood sample with or without your consent, pursuant to T.C.A. § 55-10-406(c).
Refusal is a civil violation, not a crime — but it results in automatic license revocation even if you are ultimately acquitted of the underlying DUI. The revocation begins at the time of the arrest notice and runs independent of the criminal case.
Two further changes took effect January 1, 2026 under SB 1400. A refusal can now be charged even when the State obtains the sample anyway — by search warrant, court order, exigent circumstances, or other lawful means — so refusing no longer denies the State its evidence for free. And oral fluid (saliva) testing is now within the implied consent framework, which matters most in drugged-driving cases, where collection procedure, officer training, and the reliability of the test are all open to challenge.
When the State Can Test You Anyway
Under current Tennessee law, officers must either obtain your consent, obtain a search warrant, or demonstrate exigent circumstances before drawing blood. However, T.C.A. § 55-10-406(c) requires blood testing — with or without consent, with a warrant or under exigent circumstances — whenever:
- The driver was in a crash causing injury or death to another;
- A passenger in the vehicle was under 18; or
- The driver has a prior conviction for DUI, vehicular assault, aggravated vehicular assault, vehicular homicide, or aggravated vehicular homicide.
Two Parallel Tracks: Criminal Court and the Tennessee Department of Safety
A Tennessee DUI arrest sets two separate proceedings in motion. The criminal case is prosecuted by the District Attorney in General Sessions, Criminal, or Municipal Court. At the same time, the Tennessee Department of Safety and Homeland Security (TDOSHS) acts as an administrative agency to revoke or suspend your driver’s license. The two tracks have different burdens of proof, different procedures, different decision-makers, and different deadlines — and an outcome on one side does not automatically dictate the result on the other.
Different Burdens, Different Decision-Makers
In criminal court, the prosecution must prove every element of the offense beyond a reasonable doubt to a judge or jury. In a Department of Safety administrative hearing, the State need only show by a preponderance of the evidence that the officer had probable cause for the DUI arrest and that you either tested over the limit or refused. Proceedings are conducted by an administrative judge or hearing officer under the Uniform Administrative Procedures Act, T.C.A. Title 4, Chapter 5. The rules of evidence are relaxed; hearsay is often allowed.
Implied-Consent Revocation Is Independent of the DUI Charge
You can be acquitted of DUI in criminal court and still lose your license through the Department of Safety. The implied-consent revocation under T.C.A. § 55-10-406 is a civil consequence imposed by the administrative agency for refusing the chemical test. The criminal jury’s verdict has no automatic preclusive effect on the administrative hearing officer. This is why preserving your right to an administrative hearing matters even when the criminal case looks strong.
Deadlines Are Short and Unforgiving
The window to request an administrative hearing on a license revocation is measured in days, not weeks. Practitioners commonly cite a 10-business-day window after the notice of revocation. Miss the deadline and the revocation becomes automatic — there is no good-cause exception, and a successful criminal defense months later will not undo it retroactively. The exact deadline depends on the type of revocation and the date of notice, so consult a lawyer immediately after arrest.
What the Department of Safety Controls That the Court Does Not
- Restricted licenses based on administrative suspensions. If your suspension is administrative (e.g., implied-consent refusal), the path to a restricted license runs through TDOSHS, not through the sentencing court.
- Reinstatement. Even after you have served every day of your sentence and paid every dollar of your fines, your license stays revoked until the Department processes a reinstatement application, collects the $103 reinstatement fee, an SR-22 fee, and a $75 surrender fee if applicable, and verifies all compliance documents.
- SR-22 insurance filings are tracked by the Department’s Financial Responsibility Division. A lapse in your SR-22 — even years into the revocation period — triggers a fresh suspension.
- Out-of-state convictions and reciprocity. When another state notifies Tennessee of a revocation, the Department sends a 30-day notice and, absent clearance or a timely hearing request, cancels your Tennessee license under T.C.A. § 55-50-902.
- Ignition interlock compliance. The interlock reporting agency forwards monthly data directly to the Department’s monitoring division. A “violation” finding by the Department can reset your 120-day compliance clock under T.C.A. § 55-10-425 even if no court hearing was held.
- Points and accumulation suspensions that have nothing to do with the criminal case but can run concurrently with a DUI revocation.
Appeals From the Department Go to Chancery Court
An adverse Department of Safety decision is appealed not to the criminal court, but to Chancery Court for judicial review under the Uniform Administrative Procedures Act. The reviewing chancellor does not retry the case — review is generally limited to whether the agency’s decision was supported by substantial and material evidence, was within the agency’s authority, and was not arbitrary or capricious. This is a fundamentally different posture from a criminal appeal, and it requires counsel familiar with administrative practice.
Ignition Interlock and Restricted License
A Tennessee DUI conviction triggers automatic license revocation. You may, however, be eligible for a restricted license under T.C.A. § 55-10-409 that allows you to drive for specified purposes — work, school, court-ordered programs, medical appointments — during the revocation period.
When an Ignition Interlock Device (IID) is Required
Under T.C.A. §§ 55-10-409 and 55-10-417, an IID is required — not optional — in any of the following situations:
- A first DUI with BAC of 0.08% or higher if you want a restricted license (T.C.A. § 55-10-409(b)(2)(B));
- Any DUI with a prior DUI or § 55-10-421 conviction within the past 10 years;
- Any DUI where a child under 18 was a passenger;
- Any second or subsequent DUI;
- Any DUI arising from a crash with injury.
How the Device Works
An IID is a breath-alcohol analyzer wired into the vehicle’s starter circuit. The vehicle will not start if your breath alcohol exceeds 0.02%. The device also requires random “rolling retests” while you are driving. Every test is photographed and logged; the data is reported to the state monitoring agency every 30 days.
Compliance-Based Removal
Under T.C.A. § 55-10-425, the interlock period is the longer of 365 consecutive days or the full period of license revocation. To have the device removed at the end of that period, you must complete the final 120 days violation-free — meaning no failed start attempts above 0.02%, no skipped rolling retests, and no attempts to tamper with or circumvent the device. Any violation in that final 120-day window resets the clock.
Costs You Should Expect
- Installation: typically $70–$150.
- Monthly monitoring/calibration: roughly $60–$100 per month.
- $12 one-time electronic monitoring fee under T.C.A. § 55-10-417(m).
- Removal fee when the period ends.
- Indigent drivers may qualify for assistance through the Electronic Monitoring Indigency Fund under T.C.A. § 55-10-419.
Applying for the Restricted License
The court order for a restricted license must be presented to a Tennessee Driver Service Center within 10 days of issuance, along with proof of SR-22 insurance, a $65 license fee, and a $2 application fee. The court order itself serves as a 10-day temporary restricted license; a hard copy is mailed after your visit to the Service Center. If the suspension is administrative rather than court-imposed, the restricted license must be approved by the Department of Safety, not the sentencing court.
Talk to a Memphis DUI lawyer
Patrick Brooks handles every DUI case personally in Shelby County General Sessions, the Germantown, Bartlett and Collierville municipal courts, and Tipton and Fayette County. A first-offense DUI starts at $3,500, flat; the schedule is on what a DUI lawyer costs in Memphis. Call (901) 324-5000, or call or text the criminal line at 901-412-2973, any time. Se habla español.
Frequently asked questions
How long do I have to request the license hearing?
Days, not weeks. Practitioners commonly cite ten business days from the notice of revocation, the exact window depends on the type of revocation and the date of notice, and there is no good-cause exception for missing it. Call before you do anything else.
If I win the criminal case, do I get my license back automatically?
No. The implied-consent revocation is independent of the DUI charge. An acquittal in criminal court does not undo an administrative revocation that was never contested on time.
Can I drive to work during a revocation?
Often, on a restricted license, and in most cases with an ignition interlock installed. The court order is presented to the Department of Safety, which issues the restricted license once the interlock is in place.