Florida DUI Laws: BAC Limits and Implied Consent

Under Florida DUI laws, you’re driving under the influence if your blood or breath alcohol level is 0.08 or higher, or if any substance impairs your normal faculties (Fla. Stat. 316.193). Florida also has an “implied consent” law: by driving here, you’ve already agreed to take a breath, blood, or urine test when lawfully asked, and refusing carries its own license penalty (Fla. Stat. 316.1932). If you were just arrested, the most urgent thing to know is this: you usually have only 10 days to act to protect your driving privilege. The rest of this page explains what that means.

Florida’s BAC Limits

The legal limit depends on who you are and what you’re driving. Florida sets three different thresholds (Fla. Stat. 316.193, FLHSMV):

Two things are worth knowing. First, you can be charged even below 0.08 if an officer believes alcohol or another substance impaired your “normal faculties,” because the statute covers impairment, not just a number (Fla. Stat. 316.193). Second, a BAC of 0.15 or higher, or having a minor in the vehicle, is an “enhanced” level that raises the possible penalties. If you’re under 21, see our guide to underage DUI in Florida, and if you hold a commercial license, read about a CDL DUI in Florida.

Implied Consent and the Breath Test

Florida’s implied consent law means that operating a vehicle here counts as agreeing in advance to chemical testing when an officer has lawful cause to ask (Fla. Stat. 316.1932). You can still physically refuse, but refusing has consequences separate from the DUI charge itself.

What happens if you refuse

A first refusal triggers an administrative driver’s license suspension of one year (FLHSMV). A second or later refusal is an 18-month suspension and can be charged as a separate misdemeanor (Fla. Stat. 316.1932, FLHSMV). Whether refusing helps or hurts your case depends on the facts, so it’s not a simple yes or no. We walk through the trade-offs in our guide on refusing a breathalyzer in Florida.

The officer’s duty to warn you

Before a refusal can be used against you, the officer is generally required to read you the implied consent warning, telling you that refusing will suspend your license (Fla. Stat. 316.1932). If that warning wasn’t properly given, the refusal may be challenged. That’s a detail a lawyer reviews case by case.

The 10-Day Window and Administrative Suspension

This is the part that surprises most people. There are actually two separate processes after a DUI arrest: the administrative license suspension handled by FLHSMV, and the criminal case handled by the court. They run on different tracks.

When you’re arrested for DUI with a BAC at or above the limit, or for a refusal, the officer typically takes your physical license and issues a temporary driving permit good for 10 days (FLHSMV). Within that same 10-day window, you can request a formal review hearing to challenge the administrative suspension (Fla. Stat. 322.2615). If you don’t request it in time, the suspension usually takes effect automatically.

Here are the standard administrative suspension periods (FLHSMV):

For more on how the suspension works and how to get back on the road, see DUI license suspension in Florida and getting your license back after a DUI.

Criminal Penalties by Offense

The court case is separate from the license suspension and carries its own penalties. Florida counts prior offenses using lookback periods: a second offense is more serious if it falls within 5 years of a prior, and a third within 10 years can become a felony (Fla. Stat. 316.193). Our Florida DUI lookback period guide explains how those windows are counted.

Source: Fla. Stat. 316.193. A higher BAC (0.15 or higher) or a minor passenger usually raises these numbers. Ignition interlock is often required, and a third offense within 10 years is generally charged as a felony DUI in Florida. For a deeper breakdown, see our pages on a first offense DUI in Florida, the full range of Florida DUI penalties, and the real cost of a Florida DUI.

Frequently Asked Questions

What is the legal BAC limit in Florida?

It’s 0.08 for most drivers age 21 and over (Fla. Stat. 316.193). The limit drops to 0.02 for drivers under 21 and 0.04 for commercial drivers (FLHSMV). You can also be charged below those numbers if an officer believes a substance impaired your normal faculties.

How long do I have to save my license after a Florida DUI?

In most cases you have just 10 days from your arrest to request a formal review hearing with FLHSMV to challenge the administrative suspension (Fla. Stat. 322.2615). The officer usually gives you a 10-day temporary permit at arrest. Missing that window typically lets the suspension take effect automatically.

Will refusing a breath test help me in Florida?

Not automatically. A first refusal triggers a one-year license suspension on its own, and a second refusal is 18 months and can be a separate crime (Fla. Stat. 316.1932, FLHSMV). Whether refusing helps depends on the specific facts of your stop, so there’s no one-size answer.

Is a DUI a felony in Florida?

Usually no on a first or second offense, which are misdemeanors. A third DUI within 10 years of a prior is generally charged as a third-degree felony (Fla. Stat. 316.193). A DUI causing serious injury or death can also be a felony regardless of prior count.

If you’ve just been arrested, the calmest next step is to mark your 10-day deadline on a calendar today and read up on the Florida DUI court process so you know what’s coming. Knowing the law is the first step toward making clear decisions.