Florida Blood Alcohol Level Chart: Limits, Thresholds, and Penalties

The legal blood alcohol limit to drive in Florida is 0.08% for adults 21 and older, 0.04% for anyone operating a commercial vehicle, and 0.02% for drivers under 21.¹ Reaching the applicable number creates a per se DUI, which means prosecutors do not have to prove you looked or acted drunk. The chemical reading alone is enough. A first conviction at the adult limit brings fines of $500 to $1,000, up to six months in jail, a license revocation of at least 180 days, mandatory community service, and an FR-44 insurance filing that drives premiums up for years.

The Three Legal Limits

Florida’s blood alcohol concentration (BAC) rules work as bright lines. If a breath or blood test puts you at or above the number that applies to you, that number is the case.

0.08% for adult drivers. This is the per se threshold for anyone 21 or older in a regular passenger vehicle.¹ A test at this level or higher triggers DUI charges automatically.

0.04% for commercial drivers. Anyone holding a commercial driver’s license (CDL) and operating a commercial vehicle faces half the adult limit. A first violation at 0.04% or above disqualifies the driver from any commercial vehicle for one year, and a second violation makes that disqualification permanent.² The federal disqualification also follows a CDL holder who gets a standard DUI in a personal vehicle, or who refuses a required test.

0.02% for drivers under 21. Florida’s zero-tolerance law makes it unlawful for anyone under 21 to drive with a BAC of 0.02% or higher. A single drink can put a younger driver there. A first violation brings a six-month administrative license suspension, and a second brings a one-year suspension.³ A BAC between 0.02% and 0.079% for a driver under 21 is not a criminal offense and does not involve an arrest; it is handled as a license suspension. An underage driver who tests at 0.08% or higher faces the same criminal DUI charges as any adult.

The 0.15% Enhanced Threshold

A BAC at or above 0.15% is not a separate “limit,” but it changes every penalty on the chart. At any offense level, a high-BAC reading roughly doubles the fine range and lengthens potential jail time. The same enhanced penalties apply if a child under 18 was in the vehicle, no matter the BAC.

At a first conviction, fines climb to $1,000 to $2,000 and jail exposure rises to nine months.¹ An ignition interlock device becomes mandatory for at least six continuous months on every vehicle you own or regularly drive. At the standard 0.08% level, the interlock is at the judge’s discretion for a first offense; at 0.15%, the court has no choice. The device requires a clean breath sample before the engine starts and prompts random retests while you drive. Monthly lease and monitoring fees generally run $60 to $90.

For a second offense at 0.15% or higher, fines run $2,000 to $4,000 with up to 12 months in jail. A third at that level carries a minimum fine of $4,000.²

You Can Be Charged Below the Limit

A reading under 0.08% is not a safe harbor. The DUI statute separately prohibits driving under the influence when your normal faculties are impaired, regardless of what the number says.¹ In those cases, prosecutors rely on officer observations, dashcam footage, and field sobriety test performance instead of a specific BAC.

What a First Conviction Costs

A first DUI at the standard adult limit combines criminal, administrative, and financial penalties:

Fines of $500 to $1,000.¹
Up to six months in jail.
License revocation of at least 180 days and up to one year.⁴
Up to one year of probation, with any jail time included in that total.⁵
At least 50 hours of community service.
10 days of vehicle impoundment.
A mandatory Level I DUI school of at least 12 classroom hours, which must be finished before you can apply for hardship reinstatement.⁶

Repeat Offenses and When DUI Becomes a Felony

Florida uses different lookback windows for different offense counts. The time between convictions decides both how harsh the sentence is and whether the charge stays a misdemeanor.

Second Conviction

A second DUI carries a fine of $1,000 to $2,000, up to nine months in jail, and a mandatory ignition interlock for at least one year.⁵ If it falls within five years of the first, the court must impose at least 10 days in jail (with 48 consecutive hours), 30 days of vehicle impoundment, and a minimum five-year license revocation.² The Level II DUI program runs at least 21 classroom hours.⁶

Third Conviction Within 10 Years

This is where the charge becomes a felony. A third conviction within 10 years of the second is a third-degree felony, with up to five years in prison and a fine of $2,000 to $5,000.² The court must impose at least 30 days in jail (with 48 consecutive hours), a two-year interlock requirement, 90 days of vehicle impoundment, and a minimum 10-year license revocation.⁵ A third DUI more than 10 years after the second stays a misdemeanor, but still carries escalated penalties.

Fourth and Beyond

A fourth DUI is always a third-degree felony, no matter how long since the last one. Fines can reach $5,000 and the license revocation is permanent.² A DUI causing serious bodily injury is also a third-degree felony, and DUI manslaughter carries a mandatory minimum of four years in prison.

Losing Your License and Driving Again

Every DUI conviction triggers a revocation. The length depends on your record:

First conviction: 180 days to one year.⁴
Second within five years: minimum five years.
Third within 10 years: minimum 10 years.
Fourth: permanent.²

Florida allows a hardship license, which lets you drive to work, school, or medical appointments during the revocation. For a first conviction, you must finish DUI school and serve at least 30 days of suspension before applying for a hardship hearing at the Department of Highway Safety and Motor Vehicles.² For a second within five years, the wait is one year. For a third within 10, two years. You cannot drive at all during those waiting periods.

A hardship license for a repeat offender also requires you to stay enrolled in a DUI supervision program for the rest of the revocation. Miss counseling or treatment and the hardship license gets canceled. Before reinstatement, you must also have gone at least 12 months without consuming alcohol or controlled substances and without driving.

FR-44 Insurance After a DUI

Florida is one of only two states that requires an FR-44 filing after a DUI, instead of the more common SR-22. The FR-44 demands liability limits far above Florida’s normal minimums:

$100,000 bodily injury per person (standard minimum: $10,000)
$300,000 bodily injury per accident (standard minimum: $20,000)
$50,000 property damage (standard minimum: $10,000)⁷

You must keep FR-44 coverage for at least three years from the date your driving privileges are reinstated. Three clean years from reinstatement and the requirement drops. Limits five to ten times the normal minimum mean substantially higher premiums for the duration. The FR-44 requirement applies whether or not the court formally adjudicated you guilty; a no-contest plea triggers it too.⁷

Refusing the Breath or Blood Test

By driving on Florida roads, you have already given legal consent to a breath, blood, or urine test if you are lawfully arrested for DUI. Refusing a test after a lawful arrest carries both administrative and criminal consequences.⁸

A first refusal brings an automatic one-year license suspension. A second or subsequent refusal brings an 18-month suspension.⁸ Those suspensions run on top of any revocation that follows a DUI conviction.

Refusal is also a standalone crime. A first refusal is a second-degree misdemeanor; a second or subsequent refusal is a first-degree misdemeanor with up to one year in jail.⁹ The refusal itself is admissible as evidence at trial, so saying no to the test does not necessarily help your defense and adds a separate charge. Many Florida jurisdictions also run “no-refusal” enforcement during holiday weekends, with prosecutors and judges standing by so officers can get an electronic warrant for a blood draw within minutes of a refusal.

1
Florida Senate. Florida Code 316 – Driving Under the Influence, Penalties
2
Florida Department of Highway Safety and Motor Vehicles. Florida DUI and Administrative Suspension Laws
3
The Florida Legislature. Florida Statutes 322.2616
4
The Florida Legislature. Florida Statutes 322.28 – Period of Revocation
5
The Florida Legislature. Florida Code 316 – State Uniform Traffic Control
6
Florida Department of Highway Safety and Motor Vehicles. Licensed DUI Programs in Florida
7
Florida Senate. Florida Statutes 324.023 – Financial Responsibility for Bodily Injury or Death
8
The Florida Legislature. Florida Code 316.1932 – Tests for Alcohol, Chemical Substances, or Controlled Substances
9
The Florida Legislature. Florida Statutes 316.1939 – Refusal to Submit to Testing