New Hampshire boat registration is handled by the Department of Safety, Marine Patrol Division, and covers any motorized vessel or sailboat over a certain size that operates on state waters.

New Hampshire requires registration for boats with motors of any size, and for sailboats 14 feet or longer. Registration is not a one-time purchase—you renew it annually, and the process differs slightly depending on whether you own the boat outright, are financing it, or are registering it for the first time in the state.

The Marine Patrol Division issues registration certificates and decals. You'll need proof of ownership (a bill of sale, manufacturer's certificate, or previous registration), proof of identity, and proof that the boat hull has been inspected for damage or defects if it's new to New Hampshire. The registration itself costs a fee based on the boat's length; that fee varies year to year, so check the current schedule on the Marine Patrol website before you submit.

Key Takeaways

  • Motorized boats of any size and sailboats 14 feet or longer must be registered with New Hampshire's Marine Patrol Division.
  • Registration is valid for one year from the date of issue and must be renewed annually; you cannot renew early.
  • You can register in person at any Marine Patrol office, by mail, or online through the state's boat registration portal.
  • The registration fee depends on your boat's length and changes annually; check the current fee schedule before paying.
  • New boats or boats new to New Hampshire may require a hull inspection before registration is issued.

What boats must be registered in New Hampshire

Any boat with a motor—regardless of horsepower—must be registered. This includes outboard motors, inboard motors, jet drives, and electric motors. Sailboats must be registered if they are 14 feet or longer. Boats under 14 feet with no motor do not need registration, though you may still want to carry proof of ownership if you transport them.

Boats registered in another state that you bring into New Hampshire temporarily (for a vacation, for example) do not need New Hampshire registration as long as you keep your out-of-state registration with you. However, if you move to New Hampshire or keep the boat here for more than 90 days, you must register it in the state.

How to register a new boat or a boat new to New Hampshire

If you are registering a boat for the first time in New Hampshire, you will need a bill of sale or manufacturer's certificate of origin showing you own the boat. If the boat is financed, bring the loan documents showing the lienholder's name and address. You will also need a photo ID and proof of New Hampshire residency (a utility bill, lease, or tax return dated within the past 12 months).

New boats or boats that have never been registered in New Hampshire may require a hull inspection. The Marine Patrol Division conducts these inspections to verify the hull identification number (HIN) matches the paperwork and to check for damage or defects. You can request an inspection appointment by calling the Marine Patrol office in your region or by visiting in person. Once the inspection is complete and passed, you can proceed with registration.

You can submit your registration by mail, in person at any Marine Patrol office, or online through the state portal. Mail submissions should be sent to the Marine Patrol Division with all required documents and the registration fee. Processing by mail typically takes 5 to 10 business days. Online registration is faster and allows you to print your temporary decal when ready; your permanent decal will arrive by mail within two weeks.

Annual renewal and decal replacement

Your boat registration expires one year from the date it was issued. You cannot renew early—the system will not accept a renewal until 30 days before expiration. The Marine Patrol Division will not send you a renewal notice by mail, so you are responsible for tracking your expiration date.

To renew, you can use the online portal, mail in a renewal form with the fee, or visit a Marine Patrol office in person. Online renewal is the fastest option and takes about 10 minutes. You will need your current registration number and the boat's HIN. If your boat information has not changed (owner, length, motor type), you do not need to provide additional documents.

Your registration decal must be displayed on the boat's hull in a visible location. If your decal is damaged, faded, or lost, you can request a replacement decal from the Marine Patrol Division. Replacement decals are issued at no additional charge and can be obtained by mail or in person.

Registration fees and what affects the cost

The registration fee is based on your boat's length overall (LOA), measured from the foremost point of the bow to the aftermost point of the stern. Boats are grouped into length categories, and each category has a set fee. A boat 16 feet long costs less than a boat 25 feet long, for example. The fee schedule changes annually and is published on the Marine Patrol website before the fiscal year begins.

Residency status does not affect the fee—New Hampshire residents and non-residents pay the same amount. If you own multiple boats, each one must be registered separately and each registration carries its own fee. There is no discount for registering more than one boat.

Transferring ownership and updating registration

If you sell your boat, the new owner must register it in their name. The sale should be documented with a bill of sale that includes the boat's HIN, the sale date, and the names and signatures of both buyer and seller. The new owner then submits their own registration with proof of ownership and payment of the registration fee.

If you change your address, update your boat's information (such as the motor type or length), or add or remove a lienholder, you must notify the Marine Patrol Division. You can update your address online or by mail. Changes to the boat itself (such as replacing the motor) may require a new inspection and a new registration certificate, depending on what changed.

Where to register and contact information

New Hampshire has three Marine Patrol regional offices: one in the Lakes Region (Laconia), one in the Seacoast (Portsmouth), and one in the Connecticut River Valley (Enfield). You can register at any of these offices during business hours, or you can mail your registration to the main Marine Patrol office in Concord. The online portal is available 24 hours a day.

To find the address and phone number of the office nearest you, visit the New Hampshire Department of Safety website and search for Marine Patrol. You can also call the main office in Concord to ask questions about registration requirements or to schedule a hull inspection. Processing times vary by method: in-person registration is when ready, online registration takes 10 minutes with a temporary decal printed on the spot, and mail registration takes 5 to 10 business days.

Frequently Asked Questions

Do I need to register a canoe or kayak?

No. Unpowered boats under 14 feet do not require registration. If your canoe or kayak has an electric motor, it must be registered.

What happens if I let my registration expire?

Operating an unregistered boat is a violation. You cannot legally use the boat on New Hampshire waters until it is registered again. Renewal is straightforward and can be done online or by mail, so renewing before the expiration date is the easiest option.

Can I register a boat if I don't live in New Hampshire?

Yes. Non-residents can register boats in New Hampshire. You will need proof of ownership, a photo ID, and proof of your out-of-state address. The registration fee is the same as for residents.

Do I need to inspect my boat every year?

No. A hull inspection is required only when you first register a boat in New Hampshire or when you make significant changes to the boat's structure or identification. Annual registration renewal does not require a new inspection.

What if my boat's hull identification number doesn't match my paperwork?

Contact the Marine Patrol Division before you attempt to register. A mismatch between the HIN and your bill of sale or certificate of origin must be resolved first, usually by obtaining corrected paperwork from the seller or manufacturer. The Marine Patrol office can advise you on the steps to take.