State service guide

Alabama DUI laws: .08 adult BAC, .15 ignition-interlock trigger, and escalating ALEA license penalties after conviction

Alabama's official DUI materials are strongest when read as a conviction-and-license-consequence system rather than as one flat first-offense chart. ALEA's driver manual says it is unlawful to drive with a 0.08 BAC, to drive under the influence of alcohol or impairing drugs, to operate a commercial vehicle at 0.04 BAC, or for drivers under 21 and school-bus or daycare drivers to operate at 0.02 BAC. The state then escalates quickly. A first conviction normally brings a 90-day suspension, but ALEA's ignition-interlock page says a first conviction under 0.15 BAC can have that full suspension stayed if interlock is elected, while a first conviction at 0.15 BAC or higher triggers mandatory one-year interlock. Repeat convictions move into one-year, three-year, and five-year revocations with longer mandatory interlock periods, and ALEA separately publishes higher reinstatement costs for alcohol- and drug-related cases.

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Adult BAC limit Alabama's general per se DUI threshold is 0.08 BAC
Lower BAC limits Commercial drivers face a 0.04 BAC limit, and drivers under 21 plus school-bus or daycare drivers face a 0.02 BAC limit
First-conviction interlock split Below 0.15 BAC, a first 90-day suspension can be fully stayed if interlock is elected; at 0.15 BAC or higher, one year of interlock is mandatory
Alcohol/drug reinstatement fee ALEA lists $275 to reinstate an alcohol- or drug-related suspension or revocation, plus a $150 interlock issuance fee when required

Overview

What this page helps you verify

A strong Alabama DUI page should not stop at the 0.08 adult BAC rule. ALEA's current public materials show several Alabama-specific details that generic benchmark pages often flatten: lower BAC thresholds for drivers under 21, CDL operators, and school-bus or daycare drivers; a first-offense split at 0.15 BAC for ignition-interlock treatment; repeat-offense revocation periods that scale sharply; and a separate ALEA reinstatement and interlock-fee layer after the court case. The official public sources reviewed here are also clearer on conviction and interlock outcomes than on every arrest-side hearing detail, so the page should stay anchored to what ALEA actually publishes.

Last reviewed: 2026-05-18. This page was manually upgraded against service-specific official sources, but requirements can still change quickly.

Usually needed

Documents and information to prepare

  • The DUI citation, court paperwork, or sentencing order showing the conviction level and any court-ordered conditions
  • Proof that you completed the required DUI or substance-abuse court referral program
  • Proof of ignition interlock installation if your conviction or election requires interlock before ALEA will issue the restricted license
  • The ALEA reinstatement requirements notice or other ALEA record showing what must be cleared before reissuance
  • Payment for the alcohol- or drug-related reinstatement fee, plus the interlock issuance fee and any additional drug-related fee that applies

Typical flow

What the process often looks like

  1. Identify first whether the case is a standard adult DUI, an under-21 or CDL case, or a repeat conviction, because Alabama's BAC thresholds and license consequences change materially by category.
  2. Separate the first-conviction under-0.15 lane from the 0.15-and-higher lane, because ALEA publishes different ignition-interlock treatment for those two first-offense situations.
  3. Follow the court referral and interlock requirements early instead of waiting until the suspension or revocation period ends, because ALEA will not reissue the license without proof of required program completion and interlock compliance when interlock is mandatory.
  4. Before driving again, confirm that the suspension or revocation period, the ALEA reinstatement fees, and any required ignition-interlock restricted license have all been satisfied.

Core offense rules

Alabama's DUI law is broader than one adult 0.08 BAC rule

The official ALEA manual leads with several different Alabama DUI triggers.

  • ALEA's driver manual says it is unlawful to drive while under the influence of alcohol or drugs, with a 0.08 BAC or more, or while under the combined influence of alcohol and a drug to a degree that renders the person incapable of safely driving.
  • The same manual says commercial vehicle operators are unlawful at 0.04 BAC or more.
  • Drivers under 21, and school-bus and daycare drivers, are subject to a 0.02 BAC threshold in Alabama.

Conviction escalation

Alabama's published penalties ramp up quickly from a 90-day first suspension to felony treatment on a fourth or subsequent conviction

This is where a generic first-offense-only page becomes too shallow.

  • ALEA's driver manual says a first conviction carries a $600 to $2,100 fine, up to one year in jail, and a 90-day license suspension.
  • For a second conviction in five years, the manual says the fine rises to $1,100 to $5,100, with a mandatory 48 hours in jail or 20 days of community service, plus a one-year revocation.
  • For a third conviction, ALEA says the fine rises to $2,100 to $10,100, the revocation period becomes three years, and the jail term includes a mandatory 60 days that cannot be probated or suspended.
  • ALEA says a fourth or subsequent conviction is a Class C felony, with a $4,100 to $10,100 fine, a five-year revocation, and imprisonment of one year and one day to ten years.

Ignition interlock

In Alabama, the most important first-offense split is whether the BAC stays below 0.15

ALEA's ignition-interlock page is more precise about this than many benchmark summaries.

  • ALEA says that on a first conviction with BAC below 0.15, the 90-day suspension can be entirely stayed if the driver voluntarily elects and installs ignition interlock for 90 days.
  • On a first conviction with BAC above 0.15, ALEA says ignition interlock is mandatory for one year and the suspension is stayed with proof of installation.
  • ALEA then escalates mandatory interlock to two years on a second conviction, three years on a third conviction, and four years on a fourth or subsequent conviction, with minimum suspension or revocation time that must be served before the interlock period starts.
  • ALEA also says the ignition-interlock law does not apply to CDL disqualifications.

Refusal and reinstatement

Chemical-test refusal and ALEA fees can add another layer on top of the court sentence

This is the part many generic DUI pages treat too casually.

  • The ALEA manual says Alabama's implied-consent law treats operation on public highways as consent to chemical testing of blood, breath, or urine, and that a driver who refuses a directed breath test will have the license suspended.
  • ALEA's ignition-interlock page says refusals add one additional year to the interlock term except on a first conviction.
  • ALEA's reinstatement page lists alcohol- or drug-related reinstatement fees at $275 for a suspension or revocation, plus a $150 interlock issuance fee and an additional $25 drug-related fee when applicable.
  • The statute-based court referral requirement also matters because ALEA says it will not reissue the license without proof that the required DUI or substance-abuse program was successfully completed.

Accuracy notes

Where people get tripped up

  • Alabama DUI content should keep the under-21, CDL, and school-bus or daycare BAC thresholds visible instead of flattening everything into the adult 0.08 rule.
  • The first-offense BAC split at 0.15 is one of the state's most important practical DUI details because it changes ignition-interlock treatment immediately.
  • The official ALEA sources reviewed here are clearer on conviction, interlock, and reinstatement consequences than on every arrest-side review deadline, so the page should not invent unsupported hearing timing details.
  • Do not state that SR-22 is universal in every Alabama DUI case unless the specific ALEA reinstatement record for the driver requires it.

FAQ

Common questions

  • What BAC is illegal for DUI in Alabama?

    For most adult drivers, Alabama's per se DUI threshold is 0.08 BAC. The ALEA manual also lists a 0.04 BAC threshold for commercial drivers and a 0.02 BAC threshold for drivers under 21 and for school-bus and daycare drivers.

  • Can a first Alabama DUI avoid the full 90-day suspension?

    Sometimes. ALEA says a first conviction with BAC below 0.15 can have the 90-day suspension fully stayed if the driver elects and installs ignition interlock for 90 days.

  • What happens if the BAC is 0.15 or higher on a first Alabama DUI?

    ALEA's ignition-interlock page says a first conviction above 0.15 BAC requires one year of ignition interlock, with the suspension stayed once proof of installation is provided.

  • Is a fourth DUI in Alabama a felony?

    Yes. ALEA's driver manual says a fourth or subsequent DUI conviction is a Class C felony.

  • What does ALEA require before reissuing a DUI-related license?

    ALEA's public materials say you must clear the suspension or revocation, pay the alcohol- or drug-related reinstatement fee, satisfy any interlock requirement, and provide proof of completion of the required DUI or substance-abuse court referral program.

Sources

Official references used for this page

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