Tennessee DUI Laws: Complete Guide (2024)
Last Updated: January 2025
Reading Time: 18 minutes
Difficulty: High
Quick Overview
Driving Under the Influence (DUI) in Tennessee is a serious offense with severe consequences including license suspension, fines, jail time, and a permanent criminal record. This guide explains Tennessee DUI laws, penalties by offense number, the administrative license revocation process, ignition interlock requirements, and the court process you will face.
At a Glance
| Requirement | Details |
|---|---|
| Legal BAC Limit | 0.08% for drivers 21+ |
| Commercial Driver BAC Limit | 0.04% |
| Under 21 BAC Limit | 0.02% |
| Implied Consent Law | TCA § 55-10-406 |
| DUI Statute | TCA § 55-10-401 |
| License Revocation (1st DUI) | 1 year |
| Lookback Period | 10 years for enhanced penalties |
What Is a DUI in Tennessee?
Legal Definition
> "It is unlawful for any person to drive or be in physical control of any automobile or other motor driven vehicle on any of the public roads and highways of the state, or on any streets or alleys, or while on the premises of any shopping center, trailer park, or any apartment house complex, or any other premises which is generally frequented by the public at large, while:"
>
> 1. Under the influence of any intoxicant, marijuana, narcotic drug, or any drug producing stimulating effects on the central nervous system; OR
> 2. With a blood alcohol concentration (BAC) of 0.08% or higher (0.04% for commercial drivers, 0.02% for drivers under 21)
>
> — Tennessee Code Annotated § 55-10-401
Definition: Driving Under the Influence
> "The operation of a vehicle while impaired by alcohol, drugs, or any intoxicating substance to a degree that renders the driver incapable of safely operating the vehicle."
> — Black's Law Dictionary (11th ed.)
Key Elements of Tennessee DUI Law
| Element | Description |
|---|---|
| Driving or Physical Control | You can be charged even if parked if you have the ability to operate the vehicle |
| Public Place | Includes roads, highways, parking lots, apartment complexes, shopping centers |
| Intoxication | Can be from alcohol, prescription drugs, illegal drugs, or over-the-counter medications |
| Per Se Violation | BAC at or above legal limit is sufficient for conviction, regardless of impairment signs |
Tennessee BAC Limits
Standard BAC Limits by Driver Type
| Driver Category | Legal BAC Limit | Statute |
|---|---|---|
| Drivers 21 and Over | 0.08% | TCA § 55-10-401(a)(2) |
| Commercial Drivers (CDL) | 0.04% | TCA § 55-10-401(a)(3) |
| Drivers Under 21 | 0.02% | TCA § 55-10-401(a)(4) |
BAC Levels and Impairment
| BAC Level | Typical Effects |
|---|---|
| 0.02% | Some loss of judgment, relaxation, mild euphoria |
| 0.05% | Exaggerated behavior, loss of small-muscle control, impaired judgment |
| 0.08% | Poor muscle coordination, impaired judgment, self-control, reasoning, memory |
| 0.10% | Slurred speech, slowed reaction time, deteriorating control |
| 0.15% | Far less muscle control, major loss of balance, vomiting may occur |
| 0.20%+ | Severe motor impairment, blackout probable, life-threatening overdose risk |
Enhanced Penalties BAC Levels
Tennessee imposes enhanced penalties for "High BAC" offenses:
| BAC Level | Enhanced Penalty |
|---|---|
| 0.15% - 0.20% | Mandatory minimum jail time increases, higher fines |
| Above 0.20% | Additional mandatory jail time, mandatory ignition interlock, mandatory treatment |
Tennessee DUI Penalties by Offense Number
Tennessee uses a 10-year lookback period for determining offense number (TCA § 55-10-402). Any prior DUI conviction within the past 10 years counts as a prior offense.
First Offense DUI (Misdemeanor)
| Penalty | Details |
|---|---|
| Jail Time | 48 hours to 11 months, 29 days |
| Minimum Jail | 48 hours (consecutive) |
| Alternative to Jail | 24 hours jail + 24 hours litter removal (with judge approval) |
| Fines | $350 - $1,500 |
| License Revocation | 1 year |
| Ignition Interlock | Required for restricted license (optional for full reinstatement) |
| Court Costs | Approximately $350 - $500 additional |
Second Offense DUI (Misdemeanor)
| Penalty | Details |
|---|---|
| Jail Time | 45 days to 11 months, 29 days |
| Minimum Jail | 45 days (consecutive) |
| Fines | $600 - $3,500 |
| License Revocation | 2 years |
| Ignition Interlock | Mandatory for any relicensure (minimum 6 months) |
| Vehicle Confiscation | Possible if DUI occurred in owned vehicle |
| Community Service | Additional litter removal required |
Third Offense DUI (Misdemeanor or Felony)
A third DUI conviction is still a misdemeanor in Tennessee unless it meets aggravated criteria:
| Penalty | Details |
|---|---|
| Jail Time | 120 days to 11 months, 29 days |
| Minimum Jail | 120 days (consecutive) |
| Fines | $1,100 - $10,000 |
| License Revocation | 3 to 10 years (judge's discretion) |
| Ignition Interlock | Mandatory for any relicensure (minimum 6 months) |
| Vehicle Forfeiture | Required if DUI occurred in owned vehicle |
Fourth or Subsequent Offense DUI (Felony)
| Penalty | Details |
|---|---|
| Classification | Class E Felony |
| Jail Time | 150 days to maximum (1-6 years in prison) |
| Minimum Jail | 150 days consecutive confinement |
| Fines | $3,000 - $15,000 |
| License Revocation | 5+ years, possible permanent revocation |
| Ignition Interlock | Mandatory (if eligible for relicensure) |
| Vehicle Forfeiture | Required if DUI occurred in owned vehicle |
DUI with Child Passenger (Enhanced Penalty)
Under TCA § 55-10-416, DUI with a passenger under 18 carries enhanced penalties:
| Penalty | Details |
|---|---|
| Additional Jail | 30 days to 6 months added to base sentence |
| Additional Fine | $500 - $1,000 |
| Child Endangerment | Separate charge possible |
Administrative License Revocation (Implied Consent)
Tennessee's Implied Consent Law
Tennessee's Implied Consent Law (TCA § 55-10-406) states that by driving on Tennessee roads, you have consented to chemical testing of your blood, breath, or urine for the purpose of determining alcohol or drug content.
Definition: Implied Consent
> "A legal doctrine whereby a person is deemed to have consented to certain actions (such as chemical testing for intoxication) by virtue of having engaged in certain conduct (such as driving on public roads), regardless of whether they actually gave express consent."
> — Black's Law Dictionary (11th ed.)
License Revocation for Test Refusal
| Test Refusal Scenario | Revocation Period |
|---|---|
| First Refusal | 1 year license revocation |
| Second Refusal (within 5 years) | 2 years license revocation |
| Refusal with Prior DUI | 2 years license revocation |
License Revocation for Test Failure
| BAC Level | Revocation Period (First Offense) |
|---|---|
| 0.08% - 0.20% | 1 year |
| Above 0.20% | 1 year |
Critical Timeline: Administrative vs. Criminal Proceedings
Tennessee DUI cases involve TWO separate proceedings:
`
DUI ARREST
├── ADMINISTRATIVE PROCEEDING (Tennessee Department of Safety)
| ├── Immediate license seizure
| ├── Temporary driving permit issued (7 days)
| ├── Request for hearing deadline: 10 days
| └── Separate from criminal court
└── CRIMINAL PROCEEDING (Tennessee Courts)
├── Arraignment
├── Pre-trial motions
├── Trial or plea
└── Sentencing
`
Administrative License Revocation Periods by Offense
| Offense Number | Revocation Period (Test Failure) | Revocation Period (Refusal) |
|---|---|---|
| First | 1 year | 1 year |
| Second | 2 years | 2 years |
| Third | 3 to 10 years | 3 to 10 years |
| Fourth+ | 5+ years | 5+ years |
Ignition Interlock Device Requirements
What Is an Ignition Interlock Device?
An ignition interlock device (IID) is a breathalyzer installed in your vehicle that prevents operation unless the driver passes a breath alcohol test. Tennessee's ignition interlock program is governed by TCA § 55-10-411.
Definition: Ignition Interlock Device
> "A breath alcohol measurement instrument attached to a motor vehicle's ignition system that prevents the vehicle from starting if the driver's blood alcohol concentration exceeds a preset level."
> — Black's Law Dictionary (11th ed.)
When Is IID Required?
| Offense Type | IID Requirement | Minimum Duration |
|---|---|---|
| First DUI | Optional for restricted license | 6 months (if elected) |
| Second DUI | Mandatory for any relicensure | 6 months |
| Third+ DUI | Mandatory for any relicensure | 6 months - indefinite |
| Test Refusal | Required for early reinstatement | 1 year |
| High BAC (0.15%+) | Mandatory if reinstating | 1 year |
How Tennessee's IID Program Works
| Step | Description |
|---|---|
| 1. Installation | Device installed by state-approved vendor at your expense |
| 2. Monthly Calibration | Must visit service center monthly for recalibration |
| 3. Rolling Retests | Device requires random breath tests while driving |
| 4. Data Downloads | Service center downloads violation data |
| 5. Compliance Report | Vendor reports to Tennessee Department of Safety |
| 6. Removal | Device removed after compliance period ends |
IID Costs in Tennessee
| Cost Item | Amount |
|---|---|
| Installation Fee | $75 - $150 |
| Monthly Lease/Service | $70 - $120 |
| Calibration Fee | Included in monthly fee |
| Violation Fee | Additional costs for failed tests |
| Removal Fee | $50 - $100 |
| Total First Year Cost | Approximately $900 - $1,500 |
IID Violations and Consequences
| Violation Type | Consequence |
|---|---|
| Failed Start-Up Test | Vehicle won't start; violation logged |
| Missed Rolling Retest | Alarm sounds until test taken; violation logged |
| Tampering | License revocation extension, possible criminal charges |
| Driving Without Device | License revocation, mandatory IID period restart |
Tennessee DUI Court Process
Step 1: Arrest and Booking
| Action | Description |
|---|---|
| Traffic Stop | Officer observes driving behavior, smells alcohol, sees open containers |
| Field Sobriety Tests | Horizontal gaze nystagmus (HGN), walk-and-turn, one-leg stand |
| Preliminary Breath Test | Portable breath test (PBT) - admissible for probable cause only |
| Arrest | Handcuffed, transported to jail or police station |
| Miranda Rights | Given before custodial interrogation |
| Chemical Test Request | Officer reads implied consent warning |
| Booking | Photographed, fingerprinted, personal belongings inventoried |
| Bond Hearing | Appears before magistrate for bond determination |
Step 2: Initial Appearance / Arraignment
| Matter | Description |
|---|---|
| Timing | Usually 10-30 days after arrest |
| Charges Read | Formal reading of DUI charges |
| Rights Advised | Right to attorney, right to remain silent |
| Plea Entered | Not guilty, guilty, or no contest |
| Bond Conditions | May include alcohol monitoring, no driving restrictions |
Step 3: Discovery and Pre-Trial Motions
| Matter | Description |
|---|---|
| Discovery Request | Defense requests police reports, video, maintenance records |
| Motions Hearings | Challenges to traffic stop validity, test results, procedures |
| Suppression Motions | Request to exclude evidence obtained illegally |
| Plea Negotiations | Prosecution and defense discuss resolution options |
Step 4: Trial or Plea
| Option | Description |
|---|---|
| Guilty Plea | Accepts responsibility, proceeds to sentencing |
| Negotiated Plea | Plea to reduced charge (e.g., reckless driving) |
| Bench Trial | Judge decides guilt/innocence (no jury) |
| Jury Trial | 12-person jury decides guilt/innocence |
Step 5: Sentencing
| Matter | Description |
|---|---|
| Presentence Report | Probation officer prepares background report |
| Victim Impact Statement | If injury involved, victim may address court |
| Sentencing Hearing | Judge imposes penalties within statutory ranges |
| Conditions of Probation | DUI school, treatment, community service, restitution |
Possible Outcomes in a Tennessee DUI Case
| Outcome | Description | Consequences |
|---|---|---|
| Dismissal | Charges dropped by prosecution or judge | No record, no penalties |
| Reduced Charge | Plea to reckless driving, wet reckless | Lesser penalties, some impact |
| DUI Conviction | Guilty plea or guilty verdict | Full DUI penalties apply |
| Deferred Judgment | Judgment postponed, dismissal after compliance | No conviction if completed successfully |
DUI School and Treatment Requirements
DUI School Requirements
Tennessee court-ordered DUI schools are certified by the Tennessee Department of Mental Health and Substance Abuse Services.
| Offense Level | DUI School Hours |
|---|---|
| First Offense | 12-hour DUI school program |
| Second Offense | 20-hour DUI school program |
| Third+ Offense | 40-hour DUI school program + treatment assessment |
Treatment Program Requirements
| Assessment Result | Required Treatment |
|---|---|
| No Substance Use Disorder | DUI school only |
| Mild Disorder | Outpatient treatment (typically 20+ hours) |
| Moderate Disorder | Intensive outpatient treatment |
| Severe Disorder | Inpatient treatment may be required |
Restricted License Options
Eligibility for Restricted License
Tennessee allows limited driving privileges during license revocation under certain conditions (TCA § 55-10-411):
| Requirement | Details |
|---|---|
| Waiting Period | No driving during first revocation period (varies by offense) |
| IID Required | Must install ignition interlock device |
| Eligible Purposes | Work, school, DUI school, treatment, medical appointments |
| Application | Petition to court for restricted license |
Restricted License Purposes
| Permitted Purpose | Documentation Required |
|---|---|
| Employment | Employer letter on company letterhead |
| School/College | Class schedule or enrollment verification |
| DUI School | Certificate of enrollment |
| Substance Abuse Treatment | Treatment provider letter |
| Medical Care | Doctor's statement or appointment documentation |
| Court Appearances | Court notice or docket sheet |
| Probation Meetings | Probation officer verification |
Restricted License Hours
| Offense Type | Typical Restrictions |
|---|---|
| First DUI | Usually 12 hours per day, 6 days per week |
| Second+ DUI | More restricted hours, judge's discretion |
| Employment Verification | Must carry work verification at all times while driving |
Tennessee Driver's License Reinstatement
Reinstatement Requirements
After serving your revocation period and completing all court requirements, you must meet specific criteria to reinstate your license:
| Requirement | Description |
|---|---|
| Revocation Period Complete | Full revocation period must expire |
| IID Compliance | Interlock device requirements met (if applicable) |
| DUI School Completed | Court-approved program certificate |
| Treatment Completed | If assessed and ordered |
| Fines and Costs Paid | All court fines and costs paid in full |
| Reinstatement Fee Paid | $100+ (varies by offense) |
| SR-22 Certificate Filed | Proof of financial responsibility |
SR-22 Insurance Requirements
Tennessee requires an SR-22 certificate for license reinstatement after DUI:
| SR-22 Requirement | Details |
|---|---|
| What Is It | Certificate of financial responsibility filed by insurance company |
| Duration Required | 3 years from reinstatement date |
| Cost | Insurance premiums typically increase 30-100% |
| Lapse Consequence | License immediately suspended, reinstatement period restarts |
Reinstatement Fees by Offense
| Offense Type | Reinstatement Fee |
|---|---|
| First DUI | $100 |
| Second DUI | $250 |
| Third+ DUI | $500+ |
| Test Refusal | $250 (first), $500 (second) |
Need Help with License Reinstatement?
Jurist-Diction provides a comprehensive Driver's License Reinstatement Tool to guide you through the process of restoring your driving privileges. The tool provides step-by-step guidance for Tennessee license reinstatement based on your specific situation.
DUI Defense Strategies in Tennessee
Common Defense Approaches
| Defense Strategy | When Applicable |
|---|---|
| Challenging the Stop | Officer lacked reasonable suspicion for traffic stop |
| Field Sobriety Test Validity | Tests administered incorrectly, medical conditions affected performance |
| Breath Test Accuracy | Machine not calibrated, operator not certified, mouth alcohol present |
| Blood Test Issues | Chain of custody problems, improper storage, contamination |
| Rising BAC Defense | BAC was below legal limit while driving, rose after stop |
| Medical Conditions | Diabetes, GERD, other conditions affecting test results |
| Prescription Medication | Valid prescription, no warning about driving impairment |
Challenging the Traffic Stop
| Challenge Basis | Description |
|---|---|
| No Traffic Violation | Officer observed no violation before stop |
| Anonymous Tip | Tip lacking sufficient corroboration |
| Profile Stop | Stop based on race, age, or vehicle type rather than conduct |
| Window Tint | Illegal stop without independent violation |
Challenging Field Sobriety Tests
| Test | Common Challenges |
|---|---|
| Horizontal Gaze Nystagmus (HGN) | Officer not trained, improper lighting, medical conditions |
| Walk and Turn | Uneven surface, inappropriate footwear, physical limitations |
| One Leg Stand | Age, weight, physical conditions affect performance |
Challenging Chemical Tests
| Test Type | Common Challenges |
|---|---|
| Breath Test | Machine calibration, operator certification, mouth alcohol, radio interference |
| Blood Test | Chain of custody, preservative content, fermentation, technician certification |
| Urine Test | Less commonly used, challenges based on timing and contamination |
Tennessee DUI vs. Other Traffic Offenses
Comparison of Offenses
| Offense | Classification | Penalties | License Impact |
|---|---|---|---|
| DUI (1st) | Misdemeanor | Up to 11 months 29 days jail, $1,500 fine | 1 year revocation |
| Reckless Driving | Misdemeanor | Up to 6 months jail, $500 fine | Points only |
| Wet Reckless | Misdemeanor | Up to 11 months 29 days jail, $1,500 fine | Points only |
| Implied Consent Violation | Civil | License revocation | 1-2 years revocation |
| Open Container | Class C Misdemeanor | Up to 30 days jail, $100 fine | Points only |
| DUI with Child Passenger | Enhanced Misdemeanor | Additional jail time and fines | Same as DUI |
Point System Impact
| Violation | Points |
|---|---|
| DUI Conviction | 8 points (license suspended if 12+ points in 1 year) |
| Reckless Driving | 6 points |
| Speeding 16-25 MPH over | 5 points |
| Speeding 26+ MPH over | 8 points |
Frequently Asked Questions
Can I refuse the field sobriety tests in Tennessee?
Yes, field sobriety tests are voluntary in Tennessee. You may politely decline without penalty. However, refusing the chemical test (breath, blood, or urine) after arrest will result in immediate license revocation under the Implied Consent Law.
Should I refuse the breath test?
This is a critical decision. Consider:
- Refusing: License revoked for 1 year (first refusal), but prosecution may lack BAC evidence
- Submitting: License may still be revoked if BAC is 0.08%+, but evidence of intoxication exists
Consult an attorney before deciding, as the choice depends on specific circumstances.
How long will a DUI stay on my record?
A Tennessee DUI conviction remains on your driving record for life. However, only convictions within the past 10 years count as prior offenses for enhanced sentencing purposes.
Can I get a DUI expunged in Tennessee?
Generally, no. Tennessee law does not allow expungement of DUI convictions. However, if your DUI charge was dismissed, you may be eligible for expungement of the arrest record.
Will a DUI affect my employment?
A DUI conviction may affect:
- Jobs requiring driving (commercial drivers lose CDL)
- Professional licenses (attorneys, doctors, nurses face disciplinary action)
- Background checks (visible to most employers)
- Security clearances (may be denied or revoked)
Do I need an attorney for a first-time DUI?
While not required, a qualified Tennessee DUI attorney is strongly recommended because:
- DUI laws are complex
- Prosecutors often negotiate better with defense counsel
- Attorneys can identify constitutional violations
- Long-term consequences justify the investment
What happens if I get a DUI in another state while licensed in Tennessee?
Tennessee is part of the Driver License Compact (DLC), meaning:
- Tennessee will treat the out-of-state DUI as a Tennessee conviction
- License penalties apply as if the offense occurred in Tennessee
- Points and revocation periods will be assessed
Can I travel to Canada with a DUI on my record?
Generally, no. Canada considers DUI a serious offense and may:
- Deny entry for any DUI conviction (even misdemeanor)
- Require special rehabilitation waiver for entry
- Allow entry only after 10 years have passed and sentence is complete
What is the difference between DUI and DWI in Tennessee?
Tennessee uses only the term DUI (Driving Under the Influence). Some states distinguish between DUI and DWI (Driving While Intoxicated), but Tennessee law covers all impaired driving under the single DUI statute.
Will my insurance rates increase after a DUI?
Yes, significantly. Most insurance companies:
- Increase premiums by 30-100% after DUI
- May require SR-22 filing (additional cost)
- Some may cancel your policy entirely
- You'll be classified as a high-risk driver for at least 3 years
Can I be charged with DUI for prescription medication?
Yes. Tennessee DUI law covers "any drug producing stimulating effects on the central nervous system." This includes prescription medications that impair driving ability. A valid prescription is a defense to possession charges but NOT a defense to DUI.
Glossary
| Term | Definition |
|---|---|
| BAC (Blood Alcohol Concentration) | The percentage of alcohol in a person's bloodstream, measured as grams per 100 milliliters of blood |
| DUI | Driving Under the Influence - operating a vehicle while impaired by alcohol or drugs |
| Implied Consent | Legal doctrine that drivers consent to chemical testing by operating a vehicle on public roads |
| Ignition Interlock Device | Breathalyzer device connected to vehicle ignition that prevents starting if alcohol is detected |
| SR-22 | Certificate of financial responsibility filed by insurance company, required after license suspension |
| License Revocation | Complete termination of driving privilege, requiring reinstatement to drive again |
| License Suspension | Temporary withdrawal of driving privilege (distinct from revocation) |
| Per Se Violation | Violation based solely on BAC being at or above legal limit, regardless of impairment evidence |
| Wet Reckless | Plea bargain to reckless driving involving alcohol (not a statutory offense in Tennessee) |
| Lookback Period | Time period during which prior convictions count for enhanced sentencing (10 years in Tennessee) |
| Zero Tolerance | Law prohibiting any measurable alcohol in drivers under 21 |
Resources
Tennessee Government Resources
- Tennessee Department of Safety & Homeland Security: tn.gov/safety
- Tennessee DUI Laws (TCA § 55-10-401): justia.com/codes/tennessee/2022/title-55/chapter-10/part-4
- Tennessee Implied Consent Law: tn.gov/safety
- Ignition Interlock Program: tn.gov/safety/dui
Legal Aid and Assistance
- Tennessee Bar Association Lawyer Referral: tnbar.org
- Legal Aid of Tennessee: laet.org
- Tennessee Public Defender Conference: tnpublicdefenders.org
Treatment and Support
- Tennessee REDLINE: 1-800-889-9789 (substance abuse referral)
- Alcoholics Anonymous Tennessee: aa-tn.org
- Tennessee Association of Alcohol, Drug & Other Addiction Services: taadas.org
Related Jurist-Diction Resources
- Driver's License Reinstatement Tool: Step-by-step guidance for Tennessee license reinstatement after DUI or other suspensions
Legal Disclaimer
This guide is for informational purposes only and does not constitute legal advice. DUI laws in Tennessee are complex and change frequently. The penalties described here are current as of January 2025 but may be updated by the Tennessee legislature or interpreted differently by courts.
> "The information in this guide is provided 'as is' without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose, or non-infringement. In no event shall Jurist-Diction or its authors be liable for any claim, damages, or other liability arising from the use of this information."
If you are facing DUI charges in Tennessee, consult with a qualified Tennessee DUI attorney immediately. The consequences of a DUI conviction last a lifetime and professional legal guidance is essential.
Need Help? This guide provides general information about Tennessee DUI laws, but specific situations require personalized legal advice. Consider consulting with:
- Tennessee DUI attorney for legal representation
- Insurance provider for SR-22 filing
- Licensed treatment provider for substance abuse assessment
- Jurist-Diction's Driver's License Reinstatement Tool for license restoration guidance
© 2025 Jurist Diction. All rights reserved. This guide is updated as Tennessee laws change.