Ignition interlock in Florida
If you've been ordered to use an ignition interlock in Florida, your required time starts only after it's installed and the "P" restriction is added to your license. Call us and we'll pass your request to an interlock company that serves Florida, so they can set up your appointment.
- Intoxalock's monthly lease price in Florida
- $110-136
- Companies installing
- 8
- Program operator
- Florida Department of Highway Safety and Motor Vehicles
- Time counts
- once the device is installed and the "P" restriction is on your license
8 interlock companies in Florida
| Company | From, a month | Installation | 12 months, install included | Trustpilot |
|---|---|---|---|---|
 LifeSafer | From $50 | $70 to $150 | From $670 | 4.6 of 5 |
 Guardian Interlock | From $50 | $70 to $170 | From $670 | 3.7 of 5 |
 Smart Start | From $59.99 | From $150 | From $869.88 | 4.6 of 5 |
 ALCOLOCK | From $60 | $70 to $150 | From $790 | 2.3 of 5 |
 Low Cost Interlock | From $78.76 | $100 to $250, plus $40 set-up | From $1,085.12 | 2.9 of 5 |
 Intoxalock | $110 to $136Florida price | Set by each service center | $1,390 to $1,782install at MADD's typical range | 4.4 of 5 |
 Dräger (RoadGuard Interlock) | Call for a quoteFirst month free | 1.7 of 5 | ||
 Alcohol Detection Systems (ADS) | Call for a quote | 2.4 of 5 | ||
Rows marked "Florida price" use a price posted for Florida; the others show each company's national starting price. The 12-month column adds a year of that price, the install price and any set-up fee, or MADD's typical $70 to $150 where no install price is posted.
The Florida price for Intoxalock comes from its Florida pricing page. MADD's national range: $70 to $150 to install, then $60 to $80 a month, or $790 to $1,110 for a year.
Florida ignition interlock law
| Offense | Interlock rule |
|---|---|
| First DUI | At least 6 months, when a court orders it |
| First offense DUI, BAC 0.15 or more, or with a minor as a passenger | At least 6 months |
| Second DUI | 1 year minimum; 2 years if the reading is 0.15 or more |
| Third DUI | At least 2 years |
| Fourth or later | 5 years at minimum, as a condition tied to a hardship license |
Where these rules come from: Florida Statutes 322.2715.
Getting a license you can drive with
Once you qualify, your license gets a "P" restriction, a mark that shows you may only drive cars with an interlock. Your required time begins the day it is issued.
Installing the device is only half of it. Your time starts once you visit a driver license office or tax collector and have the P added to your license, so plan that visit right after your install.
You'll also need an interlock if you apply for a restricted license to drive for work or business after a DUI. FLHSMV runs the program.
What an interlock costs in Florida
Other companies set their own prices, so your total depends on who installs it and how long your order runs.
Across the country, a 6-month order typically runs about $430 to $630 in total and a 12-month order about $790 to $1,110.
Help paying for it
If the court decides you can't afford it, part of your DUI fine can be set aside to pay for the installation.
FLHSMV and Florida's interlock vendors have also offered discounts since September 1, 2020. Every vendor decides for itself who qualifies, so ask about discounts when you make your appointment.
If a test fails or gets missed
For convictions after July 1, 2013, the device locks you out at a reading of 0.025 or higher. A violation is any of these: two startup tests over the limit, a rolling retest that you fail or skip, or tampering with the device. A rolling retest means the device asks you to breathe into it while you're on the road.
If you get a violation letter, you have 10 days to reach a licensed DUI program and schedule a review.
At each monthly service visit, the device is recalibrated, which means it is reset so its readings stay accurate.
Taking the device off
To take the device off early, you have to surrender your license. If you remove it before your restriction ends, the clock could start over and the months you've finished wouldn't count, so check your end date first.
Updates to Florida law
The state's interlock law was last changed in 2014, and we haven't found anything newer affecting interlock periods.
The state's law on refusing a breath test was amended in 2025. According to one law firm, HB 687, "Trenton's Law," went into effect October 1, 2025 and makes refusing a test for the first time a second-degree misdemeanor. That same source reports a plan to require a one-year interlock following a refusal hasn't clearly passed into law. The 2025 change does not set a new interlock period, so the current periods still apply.