Florida · DUI · Checked October 2026
Ignition Interlock Rules in Florida
Ignition Interlock Rules in Florida: What Are the Rules?
When Florida requires an ignition interlock after a DUI.
- First offense
- Discretionary for at least 6 continuous months with BAC 0.08 or higher; mandatory for at least 6 continuous months if BAC was 0.15 or higher or a person under 18 was in the vehicle
- Repeat offenses
- Second offense: at least 1 continuous year (2 continuous years with BAC 0.15+ or a minor in the vehicle); third offense: at least 2 continuous years; fourth or subsequent: at least 5 years
First Offense in Florida
discretionary for at least 6 continuous months with BAC 0.08 or higher; mandatory for at least 6 continuous months if BAC was 0.15 or higher or a person under 18 was in the vehicle
Repeat Offenses in Florida
second offense: at least 1 continuous year (2 continuous years with BAC 0.15+ or a minor in the vehicle); third offense: at least 2 continuous years; fourth or subsequent: at least 5 years
How the Program Works in Florida
Installed at the offender's expense on all vehicles individually or jointly leased or owned and routinely operated by the offender, before a permanent or restricted license is issued; the department requires it even if the court fails to order it.
More on DUI Law in Florida
See the full overview of DUI laws in Florida and read about how ignition interlock programs work.
This page summarizes Florida law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in Florida can advise on your case.
Frequently Asked Questions
Is an Ignition Interlock Required for a First DUI in Florida?
discretionary for at least 6 continuous months with BAC 0.08 or higher; mandatory for at least 6 continuous months if BAC was 0.15 or higher or a person under 18 was in the vehicle
Is an Interlock Required for Repeat Offenses?
second offense: at least 1 continuous year (2 continuous years with BAC 0.15+ or a minor in the vehicle); third offense: at least 2 continuous years; fourth or subsequent: at least 5 years