New Hampshire Ignition Interlock Laws

For first and repeat DWI offenders, the court and the New Hampshire Department of Motor Vehicles (DMV) may require you to install an Ignition Interlock Device (IID) in your vehicle if you…

Had a breath alcohol concentration (BAC) level of .08 or higher.
Are guilty of subsequent DWI traffic offenses.
Caused bodily injury and/or death at time of DWI.
Refused to take a drug or alcohol test from a police officer on your record.

*You will be responsible for all costs and installation services for the IID, and bring your vehicle in for regular monitoring and service.

How to Get Your License Quickly in New Hampshire

Complete all jail/suspension time, as well as the Impaired Driver Care Management Program (IDCMP) and community service hours, if applicable.
File for an SR-22 proof of insurance if needed. Your insurance agent/company can help you complete this form.
Call 800.831.3299 to schedule an appointment to have your interlock device installed with a state-approved, Smart Start interlock service provider.
Pay your reinstatement, and any other applicable, fees to the New Hampshire Department of Safety.
Finally, per administrative regulations, the DMV will mail you a license restoration notice as confirmation. Note that you will still have to complete court regulations as well.

DISCLAIMER: These steps may not be a complete representation of what you must do to regain your license. As DWI case details vary by each individual, please do not see this step-by-step guide as an official process to regaining your license, but rather as a starting point only.

How Much Does a DWI Cost in New Hampshire?

DWI Offense	Jail Time	Fee *IID fees not included	Suspended License Period
First	None	$500 to $1,200	At least 6 months
Second	At least 30 days	At least $750	At least 3 years
Third and subsequent	At least 180 days	At least $750	Indefinite