DBA · New Hampshire

How to File a Trade Name for an LLC in New Hampshire

By Edmond Hui · Last updated October 6, 2026

Short answer

New Hampshire requires an LLC that does business under a name other than its own to register a trade name. An LLC or corporation registered with the Secretary of State registers a trade name only for a name other than the one it is registered under. The filing fee is $50.00.

New Hampshire Trade Name at a Glance

Requirement: Required
Where to file: Secretary of State
Fee: $50.00
How long it lasts: 5 years
Newspaper notice: None found
File online: Yes

How an LLC Files

An LLC files the Application for Registration of Trade Name with the Secretary of State.

You can file online.

A partner joining or leaving must be reported to the Secretary of State within 10 days, and a business that stops trading must file a notice within 30 days. The Secretary of State mails a renewal notice six months before the registration expires.

Open the filing office's site · Open the filing page

Cost and Renewal

The filing fee is $50.00.

The registration has a 5-year term.

Renewal costs $50.00.

Publication

We found no publication step for an LLC's trade name filing in New Hampshire.

Does it protect the name?

Registration lets the registrant ask a court to stop another business using the name, but it does not override rights someone else gained in good faith by using the name, whenever those rights were gained.

If you skip it

A partnership, LLC, corporation or other organization that does business without registering is guilty of a misdemeanor.

Sole proprietors

New Hampshire requires a sole proprietor who does business under a name other than their legal name to register a trade name. Every partnership doing business in the state must also register its trade name. A sole proprietor who does business without registering is guilty of a violation.

A sole proprietor files the Application for Registration of Trade Name with the Secretary of State.

The filing fee is $50.00.

The registration has a 5-year term.

Renewal costs $50.00.

We found no publication step for a sole proprietor's trade name filing in New Hampshire.

Requirement	Required
Where to file	Secretary of State
Fee	$50.00
How long it lasts	5 years
Newspaper notice	None found
File online	Yes

Next steps

Frequently Asked Questions

: New Hampshire requires an LLC that does business under a name other than its own to register a trade name. An LLC or corporation registered with the Secretary of State registers a trade name only for a name other than the one it is registered under.
: An LLC files the Application for Registration of Trade Name with the Secretary of State.
: The filing fee is $50.00.
: The registration has a 5-year term. Renewal costs $50.00.
: We found no publication step for an LLC's trade name filing in New Hampshire.
: Registration lets the registrant ask a court to stop another business using the name, but it does not override rights someone else gained in good faith by using the name, whenever those rights were gained.
: A partnership, LLC, corporation or other organization that does business without registering is guilty of a misdemeanor.
: New Hampshire requires a sole proprietor who does business under a name other than their legal name to register a trade name. Every partnership doing business in the state must also register its trade name. A sole proprietor who does business without registering is guilty of a violation. A sole proprietor files the Application for Registration of Trade Name with the Secretary of State.

This guide is general information, not legal or tax advice, and reading it does not create an attorney-client relationship. It reports what each state's filing office publishes about registering a business name, with the sources this page cites. A filing here does not register a federal trademark, and fees and forms change between our reviews. Confirm with the office named on this page before you file.

Sources

Each entry below is a document recorded in our verified New Hampshire sources, and each entry says what the document is. Some statutory text is read from an accurate mirror rather than from the state's own host, and those say so.

gc.nh.gov/rsa/html/XXXI/349/349-1.htmRSA 349:1, Registration; Generally
gc.nh.gov/rsa/html/XXXI/349/349-5.htmRSA 349:5, Registration; Procedure
gc.nh.gov/rsa/html/XXXI/349/349-6.htmRSA 349:6, Effect of Registration
gc.nh.gov/rsa/html/XXXI/349/349-7.htmRSA 349:7, Record; Fees
gc.nh.gov/rsa/html/XXXI/349/349-2.htmRSA 349:2, Withdrawal or Addition of Partner; Discontinuance of Business
gc.nh.gov/rsa/html/XXXI/349/349-8.htmRSA 349:8, Reregistration
gc.nh.gov/rsa/html/XXXI/349/349-9.htmRSA 349:9, Penalty
gc.nh.gov/rsa/html/XXXI/349/349-10.htmRSA 349:10, Fraudulent Registration; Civil Rights
gc.nh.gov/rsa/html/XXXI/349/349-11.htmRSA 349:11, Prior Rights
sos.nh.gov/corporations-0/forms-and-fees/trade-namesNew Hampshire Secretary of State, Trade Names (Forms and Fees)
sos.nh.gov/sites/g/files/ehbemt561/files/documents/2023-12/form_tn-1.pdfNew Hampshire Secretary of State, Form TN-1, Application for Registration of Trade Name
sos.nh.gov/corporations-0/business-faqsNew Hampshire Secretary of State, Business FAQs

Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.