Skip to content
ImNotAnAttorney logo

New Hampshire DUI Laws

DUI Defense in New Hampshire

Statutes, Penalties, and Defense Strategies

What you are facing, the deadlines that bind you, and the questions an attorney needs to answer — under New Hampshire (NH) DUI law.

BAC Limit

0.08

Enhanced BAC

0.16

Higher penalties above this

Lookback Period

10 years

Prior offenses count within

⚠

30 days-Day DMV Hearing Deadline

New Hampshire gives you 30 days days from the arrest to ask for a DMV hearing. This is the

administrative hearing

Plain language

A DMV review of the license suspension — separate from the criminal court case, with its own paperwork and deadline.

that decides the license suspension. Miss the deadline and the suspension starts on its own, even if the criminal case ends in dismissal later.

First Offense Penalties in New Hampshire

Jail TimeNo mandatory jail (rarely imposed)
Fines$500 – $1,200
License Suspension9 months – 2 years
Ignition Interlock

Plain language

A breath-tester wired into the car ignition. The car will not start without a clean sample.

May be ordered by the court

Implied Consent and Test Refusal

New Hampshire has an

implied consent law

Plain language

By driving on the state's roads, you have already agreed to a chemical test if an officer has probable cause to think you are impaired.

like every state. The test can be breath, blood, or urine. Refusing carries its own penalty, listed below.

Refusal Penalty

180-day license suspension

New Hampshire-Specific Detail

New Hampshire is one of the few states where first-offense DUI rarely results in jail time. However, the license suspension (9 months to 2 years) is among the longest for a first offense.

Is your New Hampshire DUI defense on track?

The Masked Researcher’s First Read checks 10 critical defense behaviors specific to DUI cases. Takes 2 minutes. Instant results.

Take the Free Defense Score

DUI Defense Playbook — $127

26 questions that change how your next attorney meeting goes, a case stage roadmap, red flag checklist, and a case progress scorecard. Instant PDF download — calibrated for New Hampshire DUI defendants.

Get the DUI Playbook — $127Read the Free DUI Guide

Other New Hampshire defense topics

Facing a different charge in New Hampshire? Penalty ranges, enhancements, and defense questions for related crimes:

Drug Possession in New HampshireAssault in New HampshireDomestic Violence in New Hampshire

Important: This page provides general legal information about New Hampshire DUI laws as of the date of publication. Laws change frequently. This is not legal advice. For guidance specific to your case, speaking with a New Hampshire-licensed attorney is one option, or take the free Masked Researcher’s First Read to see where your case stands.