Utah · DUI · Checked October 2026
Ignition Interlock Rules in Utah
Ignition Interlock Rules in Utah: What Are the Rules?
When Utah requires an ignition interlock after a DUI.
- First offense
- Ordered as a probation condition unless the court finds it unnecessary; mandatory if you were under 21. Interlock restriction lasts 18 months after a first alcohol DUI conviction (2 years if under 21)
- Repeat offenses
- Mandatory on every vehicle registered to or operated by you for a conviction within 10 years of a prior; restriction lasts 2 years (3 years after a felony DUI, 4 years after automobile homicide)
First Offense in Utah
Ordered as a probation condition unless the court finds it unnecessary; mandatory if you were under 21. Interlock restriction lasts 18 months after a first alcohol DUI conviction (2 years if under 21).
Repeat Offenses in Utah
Mandatory on every vehicle registered to or operated by you for a conviction within 10 years of a prior; restriction lasts 2 years (3 years after a felony DUI, 4 years after automobile homicide).
How the Program Works in Utah
The restriction period runs from the day you provide proof of installation and reinstate your license, and is extended by any days the device is removed. You pay the costs unless the court finds you indigent. Driving an employer-owned vehicle for work is allowed with employer verification if the vehicle is not for personal use and you do not own the business. Driving without a required interlock is a Class B misdemeanor.
More on DUI Law in Utah
See the full overview of DUI laws in Utah and read about how ignition interlock programs work.
This page summarizes Utah law from official sources, checked October 2026. It isn't legal advice; a lawyer licensed in Utah can advise on your case.
Frequently Asked Questions
Is an Ignition Interlock Required for a First DUI in Utah?
Ordered as a probation condition unless the court finds it unnecessary; mandatory if you were under 21. Interlock restriction lasts 18 months after a first alcohol DUI conviction (2 years if under 21).
Is an Interlock Required for Repeat Offenses?
Mandatory on every vehicle registered to or operated by you for a conviction within 10 years of a prior; restriction lasts 2 years (3 years after a felony DUI, 4 years after automobile homicide).