A second DUI in Florida

The five-year window is what decides your case. Inside it the court must order at least ten days of imprisonment, of which at least 48 hours must be consecutive, and must impound or immobilize every vehicle you own for 30 days — separately from the jail time, not at the same time. A second conviction also carries a mandatory interlock of at least one year on every vehicle you routinely operate, at your expense.

Start from what the statute forces and what it leaves to the judge. The floor here is up to 9 months, and at least 10 days if within 5 years, and it moves on the facts: a reading of 0.15 or higher, or a passenger under 18 means doubles the fine and adds a mandatory interlock. Everything above that floor is argued, and the same conviction can end up served in custody, on work release or as a condition of probation depending on the county and the judge. What no one can promise you is a sentence below the statutory minimum — that is not a question of persuasion.

Misdemeanor, with a mandatory interlock year: up to 9 months, and at least 10 days if within 5 years, and a fine of $1,000 to $2,000. The range is set by Fla. Stat. § 316.193(2)(a), (6)(b), and the figures on this page come from the statute rather than from a summary of it.

A reading of 0.15 or higher, or a passenger under 18 — doubles the fine and adds a mandatory interlock.

Florida does not order an interlock for every first conviction — it becomes mandatory at 0.15% BAL or with a minor in the car, and it is required whenever a convicted driver applies for a hardship or business-purposes license. Your term starts the day the "P" restriction lands on your license, not the day of the conviction. The device requirement and the criminal penalty are separate tracks: one is handled by the court, the other by Florida Department of Highway Safety and Motor Vehicles.