How Much Does an Ignition Interlock Cost in New Hampshire?

If you’ve been charged with Driving Under the Influence (DUI) in New Hampshire and must install an Ignition Interlock Device (IID) or car breathalyzer, you’re likely curious about the cost. Smart Start understands the stress and confusion that can come with a DUI, which is why we offer an affordable and user-friendly IID solution. We’re here to support you in successfully completing your Interlock program.

How do I know if I need to install an IID in New Hampshire?

"According to the New Hampshire Department of Motor Vehicles website, If you have been convicted of an aggravated DWI offense under RSA 265-A:18, I(b) or I(c), or a subsequent DWI offense under RSA 265-A:18, IV, you will be required to install an Ignition Interlock Device (IID) in any vehicle registered to you or used by you on a regular basis. This requirement will go into effect after the period of revocation or suspension of your license has been served. The IID must be installed for a minimum of 12 months. If you have received notification from the DMV that you are required to have an Ignition Interlock Device installed, you must present a Certificate of Installation issued by an approved vendor to the Bureau of Financial Responsibility at the Concord DMV office. For more information on when you would be required to install an Ignition Interlock device, please refer to New Hampshire laws RSA 265-A:36 and 265-A:36-a.

How do I install an ignition interlock device in New Hampshire?

To install a Smart Start IID in New Hampshire, simply call us at (800) 831-3299 or fill out our online form to schedule an appointment. We understand that getting an IID installed can be stressful, but we’re here to help. As a New Hampshire-certified Interlock provider, Smart Start is committed to providing you with the best possible experience. Contact us today to schedule your installation and get back on the road safely. With service centers across New Hampshire, we’ll find a convenient location for you. The installation process typically takes a few hours, and it’s easy to set up an appointment. Our skilled technicians will: • Install your Interlock device. • Demonstrate the proper way to use it. • Provide hands-on training to make sure you’re comfortable using it.

Ignition Interlock Cost in New Hampshire

With Smart Start, you don’t have to choose between “live free or drive”—even after a DWI.

Call our Program Advisors now for a free quote on Interlock Device costs near you.

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How Much Does an Interlock Device Cost in New Hampshire?

Let’s quickly review the factors that affect the cost for an Ignition Interlock Device in New Hampshire. These can vary according to your jurisdiction and DWI program.

Fortunately, you won’t be required to enter a long-term contract or buy your device. Instead, the cost of your device will usually include:

Get Started With New Hampshire Ignition Interlock Pricing

Granite State drivers count on Smart Start for affordable IID pricing, plus 24/7 multilingual service and convenient installation. We make the whole thing easy—just call now for a quote from our Program Advisors.

One-Time Enrollment Fee

One-time, non-refundable fee paid to Smart Start to secure your installation appointment.

Device Installation Labor Fee

Pays for a skilled technician to install your device. Starts at $150.00⁺, paid to the service location that installs your IID.

Affordable Monthly Lease

Our plans don’t lock you into a long-term contract — just a simple and affordable monthly lease. Starts at $106.99⁺.

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Calibration Fee

Pricing for IID services at your local Smart Start service center starts at $25.00⁺. Prices can vary, so we recommend contacting your local service center for the most accurate info.

Removal Charges

At the end of your lease, you’ll pay an administration closing fee and a labor fee to have your IID removed by a skilled technician.

Questions? Our Program Advisors are happy to assist with whatever you need—get in touch now and get your free quote on IID costs in New Hampshire.

⁺Pricing as of 2/24/25 and is subject to change. Does not include taxes and fees. Total cost may vary depending on the type of vehicle, and if you get your IID installed at a Smart Start corporate store or contract store.

What Factors Impact the Total Cost for An Ignition Interlock Device in New Hampshire?

Some other factors that can affect the cost of an IID in New Hampshire include:

Vehicle Specifics
- Some vehicles may cost more to install an IID on, particularly hybrid and electric models.
Lease Duration
- When you keep your device installed longer, your final cost will be higher. Your monitoring authority will specify how long you must keep it installed.
Multiple Vehicles
- If you own and/or drive more than one vehicle, you might be required to install an IID in each one.
Behavior
- IID violations like giving multiple above-limit samples or failing a rolling retest can result in a longer installation period, raising total costs.

Consequences for Getting a DWI in New Hampshire

Please note that the information in the following sections is for general informational purposes only. The materials contained herein are not intended to and should not be relied upon or construed as a legal opinion or legal advice or to address all circumstances that might arise. Information may be dated and may not reflect the most current developments. You should contact your attorney to obtain advice with respect to any particular legal matter. Only your individual attorney can provide assurances that the information contained herein – and your interpretation of it – is applicable or appropriate to your particular situation. Smart Start expressly disclaims all liability regarding actions taken or not taken based on any or all content. Information as of 3/20/26.

In addition to consequences such as probation and possible jail time, the New Hampshire DMV reminds drivers that the financial penalties for a DWI in New Hampshire include fines ranging from $500 to $2,000. That doesn’t include court costs and attorney fees, which together can run thousands of dollars more. When you’re ready to reinstate your license, you’ll also be responsible for paying all suspension and restoration fees imposed by the New Hampshire DMV.

Finally, New Hampshire drivers who are required to install an IID are responsible for all costs associated with their devices, including leasing, calibration, and fees. If you’re struggling to afford your IID, note that New Hampshire offers a Fee Reduction Program if you meet certain financial conditions. Ask your attorney or monitoring authority to help you determine whether you qualify.

Do You Need Installation Services for an Ignition Interlock in New Hampshire?

Find a new road to freedom after your DWI. Talk to our Program Advisors today for a free quote on Ignition Interlock Device costs in your area.

Understanding the Installation Process For an Ignition Interlock Device in New Hampshire

We offer a fast and easy installation process, and for many drivers, same-day service is available at a Smart Start service center in your area. Get started with a quote from our Program Advisors on the cost of an Ignition Interlock near you.

During your appointment, skilled technicians will:

Install your device.
Demonstrate how to use it.
Provide hands-on training and answer your questions in depth.

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Ignition Interlock Cost in New Hampshire

With Smart Start, you don’t have to choose between “live free or drive”—even after a DWI.

Fast-Track Your Installation

Want to speed up the installation appointment process?We can get you a quote faster if you fill out the information below.

Or Call (800) 831-3299 Now!

¡O llame ahora al (800) 831-3299!

How Much Does an Interlock Device Cost in New Hampshire?

Get Started With New Hampshire Ignition Interlock Pricing

One-Time Enrollment Fee

Device Installation Labor Fee

Affordable Monthly Lease

Calibration Fee

Removal Charges

What Factors Impact the Total Cost for An Ignition Interlock Device in New Hampshire?

Consequences for Getting a DWI in New Hampshire

Do You Need Installation Services for an Ignition Interlock in New Hampshire?

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Understanding the Installation Process For an Ignition Interlock Device in New Hampshire

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