2025 BOI rule update US entities are now exempt. Check if you still need to file →
We answer most inquiries within one business hour during US business days.
Start filing →
New Hampshire . DBA / Fictitious Name

File a DBA / Fictitious Business Name in New Hampshire.

A DBA (Doing Business As) . also called a Fictitious Business Name, Assumed Name, or Trade Name . lets a New Hampshire entity operate under a different name. This guide explains the filing process, where to file in New Hampshire, fees, renewal cycles, and the critical fact that a DBA is NOT a substitute for forming an LLC or Corporation.

File New Hampshire DBA →

When to file a DBA in New Hampshire

Operating under a different name than your legal entity

"Acme Holdings LLC" wants to operate retail stores as "Acme Coffee".

Sole proprietors operating under a brand name

Sole proprietorships using anything other than the owner's legal name must file a DBA in New Hampshire.

Operating multiple lines of business under one entity

Multiple brands run by the same LLC each get their own DBA.

Banking under a brand name

Banks require a filed DBA to accept payments made out to a name other than the legal entity.

Critical

A DBA is NOT a legal entity

Filing a DBA in New Hampshire does not create liability protection, tax separation, or perpetual existence. A DBA is only a name registration. If you want liability protection, form an LLC or Corporation. The DBA can then be filed in the entity's name.

How to file a New Hampshire DBA

  1. 1Determine state vs county filing. Some states file at the NH Secretary of State, others at the county clerk. Some require both.
  2. 2Check name availability. A New Hampshire DBA cannot duplicate an existing entity or DBA.
  3. 3File the Certificate of Assumed Name. Some New Hampshire jurisdictions require newspaper publication.
  4. 4Track renewal cycle. New Hampshire DBA renewals typically required every 5 years; some states sooner.
FAQ

Frequently asked questions

Where do I file a DBA in New Hampshire?
Depends on the New Hampshire jurisdiction. Some states file with the NH Secretary of State, others at the county clerk. File.Business identifies the correct filing office.
How much does a New Hampshire DBA cost?
State/county fees typically $10-$100. File.Business preparation: $79.
Does a DBA in New Hampshire replace forming an LLC?
No. A DBA is just a name registration. No liability protection, no tax separation, no perpetual existence.
Can my New Hampshire LLC file multiple DBAs?
Yes. Each brand can have its own DBA under the same LLC.
Do I need a DBA if I use my legal entity name?
No. Operating under your registered entity name does not require a DBA.
How long does a New Hampshire DBA last?
Most {s["name"]} DBAs expire after 5 years. Some require sooner renewal.
Does File.Business handle New Hampshire DBA filings?
Yes. We identify the correct jurisdiction, check name availability, prepare and file.

Ready to handle this the easy way?

Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.

File a DBA Form an entity first

Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the NH Secretary of State or any Secretary of State office. You may file directly with the NH Secretary of State. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Fees and deadlines verified against the NH Secretary of State as of June 2026 and may change. For entity-specific guidance, consult a licensed New Hampshire attorney or CPA.

File New Hampshire DBA →
File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with any Secretary of State office. You may file directly with the appropriate state agency. SOC 2 Type II audited. 220,000+ businesses formed since 2017.