New Hampshire Ignition Interlock Cost Calculator 2026
New Hampshire does not require an ignition interlock after a first DWI conviction, so there is no first-offense device cost to add up. Change the offense level below to price a second or third offense.
Your New Hampshire DWI estimate will appear here
Answer the questions and press the button. You will get a low, typical and high figure, with each cost listed on its own line.
- Uses this state's own fines, suspension and interlock rules
- Market costs such as attorney fees are labelled as estimates
- Free, and nothing to sign up for
New Hampshire DWI FAQ
How much does a DWI cost in New Hampshire?
Attorney fees for a first-offense DWI in New Hampshire typically run $1,500 to $5,000 on our estimates, and the fine is $500 to $1,200 before court costs. Adding insurance, interlock, education, reinstatement and lost time from work, our calculator puts a typical first offense at about $18,076 (range $9,791 to $28,285) with its default answers; the median of our 50 state estimates is $17,615.
How long is your license suspended for a first DWI in New Hampshire?
A first-offense DWI conviction in New Hampshire carries a license suspension of 270 days. A hardship or restricted license may be available during this period.
Is an ignition interlock device required in New Hampshire for a first DWI?
Our New Hampshire data shows no interlock requirement for a first-offense DWI.
How long is SR-22 insurance required after a DWI in New Hampshire?
New Hampshire requires SR-22 high-risk insurance filing for 3 years following a DWI conviction.
Can a DWI be expunged in New Hampshire?
New Hampshire allows DWI expungement under certain conditions, typically after a waiting period of 10 years following completion of your sentence.
New Hampshire DWI figures this calculator uses
- Ignition interlock, first offense
- None
- Ignition interlock, second offense
- 12 months
- Ignition interlock, third offense
- 12 months
- Required for every offense
- No
- Typical monthly lease and monitoring (estimate)
- $85
Statutory figures were checked against New Hampshire law (primary source) and last verified May 2026. Typical ranges are market estimates, not law; see our methodology.
Worked example
With the calculator's default answers (offense number: First offense; number of vehicles you own: 1 vehicle):
New Hampshire does not require an ignition interlock device after a first DWI conviction, so there is no device cost to estimate. A second DWI conviction carries a 12-month interlock requirement.
Change the answers in the calculator above to see your own estimate.
On our estimates, a typical first-offense DWI in New Hampshire comes to about $18,076, the 22nd highest of the 50 states. The median of our 50 state estimates is $17,615. These come from the total-cost calculator with its default answers, not from a national survey.
New Hampshire DWI Overview
All New Hampshire DWI Calculators & Laws →Related Calculators
New Hampshire Attorney Cost →New Hampshire Total Cost →New Hampshire SR-22 Insurance →New Hampshire Suspension Timeline →Related Guide
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