Running a business under a name that isn't your own legal name triggers a filing requirement in New Hampshire. The state calls it a trade name registration, though most business owners know the concept as a DBA, short for "doing business as." A DBA in New Hampshire is governed by RSA Chapter 349, administered by the New Hampshire Secretary of State, and costs $50 to file for a five-year term. Sole proprietors, LLCs, corporations, and partnerships can all file, or may be required to, depending on whether the name they operate under differs from their registered legal name. This guide walks you through the entire process: checking name availability, completing the application, choosing how to file, and managing your registration once it's active.
What is a DBA in New Hampshire?
In New Hampshire, a DBA is officially called a trade name: a name you use to conduct business that differs from your own legal name or your registered business entity name, governed at the state level under RSA Chapter 349. It lets you operate under a business name that's different from your personal or legal entity name, but does not create a new entity or protect personal assets.
New Hampshire trade name at a glance
- New Hampshire law requires that anyone doing business under any name other than their own must register that name with the Secretary of State (RSA Chapter 349).
- The registration term is five years, and there is no newspaper publication requirement.
- The filing fee is $50, payable to the State of New Hampshire.
- You can file online through the NH QuickStart portal or by mailing a completed paper form to the Secretary of State's Corporations Division.
"DBA," "fictitious business name," and "assumed name" all describe the same concept: a registered name your business uses that isn't its legal name. New Hampshire's official term is simply trade name.
A registered trade name unlocks practical things you need to actually run your business.
- Open a business bank account in your brand name rather than your personal name
- Sign contracts and invoices using the name your customers know
- Market your business consistently under a single, state-recognized name
Filing a trade name only changes the name under which you operate. It has no effect on your business entity's legal status or tax treatment, does not give you trademark rights over the name, and does not shield you from personal liability.
Here's a concrete example. Say you're a sole proprietor named Jane Smith operating a landscaping company called White Mountain Property Care. Your legal name is not the name you're doing business under, so New Hampshire law requires you to register that name with the Secretary of State before you put it on a truck, a contract, or a business card.
That requirement applies whether you're an individual sole proprietor or a formally organized business entity operating under a brand name that differs from its registered legal name.
Who needs to file a New Hampshire trade name?
Any person or business conducting business under any name other than their own legal name must register that name as a trade name with the New Hampshire Secretary of State. That rule extends to sole proprietors, partnerships, corporations, LLCs, limited partnerships, and limited liability partnerships.
Under RSA § 349:1, every sole proprietor doing business in New Hampshire under any name other than their own must register, as must every partnership, trust, or association doing business under a name other than the partners' full legal names.
For formally registered entities such as LLCs, corporations, and limited partnerships, RSA Chapter 349 applies only when they are doing business under a name other than the one they registered with the state.
New Hampshire trade name: Who must file?
| Entity type | Must file if… | Example |
|---|---|---|
| Sole proprietor | Operating under any name other than their own full legal name | Maria Lopez files because she operates as "Seacoast Pet Care" |
| General partnership | Operating under any name other than the partners' combined full legal names | Tom Hill and Dana Rowe file because their business is called "White River Plumbing" |
| LLC | Operating under a name different from its registered legal name | "Granite Peak Holdings LLC" files because it markets services as "Granite Peak Realty" |
| Corporation | Operating under a name different from its registered corporate name | "Northern Star Foods, Inc." files because it sells products under "Harvest Table" |
| Foreign entity | Operating in New Hampshire under a name different from its home-state registered name | An LLC registered as "Lakewood Digital LLC" in Massachusetts files if it does business in New Hampshire as "Lakewood Marketing" |
A trade name registration does not create a new business entity, provide liability protection, or replace any obligation to keep the underlying business structure in good standing with the state.
Does a sole proprietor need to register in New Hampshire?
New Hampshire does not require sole proprietors to form a legal business entity. But the trade name question is separate from entity formation entirely.
The test is not whether you have a business—it's whether the name you're using matches your legal name exactly. John D. Smith doing business as "John D. Smith" does not have to register. But "John Smith Enterprises" requires registration, because "Enterprises" is not part of his legal name. Add a word like "Consulting," "Services," or a geographic identifier, and you've crossed into trade name territory under RSA Chapter 349.
Without a trade name registration, the business name for a sole proprietor defaults to their personal legal name—meaning your name appears on every invoice, contract, and check, not the brand name you've built.
A few things to keep in mind:
- The filing is a trade name registration only, not a business entity formation. Your liability exposure and tax treatment don't change.
- No liability protection is created. A trade name does not separate your personal assets from your business debts.
- The $50 filing fee covers a five-year term. Mark your renewal date now so you don't let the registration lapse after you've built a brand around it.
How to get a DBA in New Hampshire: Step-by-step
Registering a trade name is a straightforward process administered by the New Hampshire Secretary of State. Follow these steps to ensure you meet all legal requirements and file your application successfully.
Step 1: Search for trade name availability
Before you fill out a single field on the application, check whether your intended name is available. Your proposed trade name must be distinguishable from other business names already on file in New Hampshire—including other registered trade names—and you can search the state's database to confirm.
Use the New Hampshire Secretary of State's online business name database at sos.nh.gov. A conflict exists not only when a name is identical but also when it is deceptively similar to an existing registration. A minor spelling variation or the addition of a common word like "the" may not be enough to distinguish your name.
Naming rules to know before you search:
- Trade names cannot include entity suffixes like "LLC," "Incorporated," or "Corp." unless the business actually holds that structure.
- Designations such as "Foundation," "Benefit Corporation," "Professional Corporation," "Limited Liability Partnership," and "Limited Partnership" may not appear in trade names.
- Words such as "bank" or "insurance" require regulatory approval before use.
Common mistakes to avoid:
- Choosing a name already on file or too similar to an existing registration
- Including a restricted word without required regulatory approval
- Adding an entity suffix that doesn't match your actual business structure
- Using punctuation or special characters the system does not accept
Catching a conflict before you submit saves you the $50 filing fee, which is non-refundable.
Step 2: Complete the New Hampshire trade name application
File an Application for Registration of Trade Name with the New Hampshire Secretary of State. The paper version is Form TN-1; the same fields appear when filing online through NH QuickStart.
- Business name: The trade name exactly as you want it to appear on your registration.
- Business address: The physical street address of the business, plus mailing address if different.
- Description of business: A brief description, for example, "real estate" or "hairdresser."
- Date business was organized: For sole proprietors, typically the date you started operating.
- Applicant information and signature: The form requires original signatures—from an authorized officer for corporations, from a manager or member for LLCs, or from one or more authorized partners for limited liability partnerships.
Missing signatures or names that conflict with existing registrations are the most common reasons applications are rejected.
Step 3: File online through NH QuickStart or by mail
New Hampshire lets you file for a DBA in two ways: online or by mail. The option you choose largely depends on your business’ needs and preferences.
Online via NH QuickStart
Sign in or create a free account at quickstart.sos.nh.gov, navigate to Business Services, and select "Create a Business Online Trade Name." Complete the application, pay the $50 fee by credit card or pre-approved ACH, and submit. Processing typically takes 3–7 business days.
By mail
Print, sign, and mail one original document to the Corporation Division on 8.5" x 11" paper in black ink. Make checks payable to "State of New Hampshire." Mailing address: Corporation Division, NH Dept. of State, 107 N Main St, Rm 204, Concord, NH 03301-4989. Mail-in applications take approximately 1–3 weeks to process.
Step 4: Pay the $50 filing fee
The $50 fee covers a five-year registration term. The renewal fee is also $50. Both are non-refundable if your application is rejected—which is why the name search in Step 1 matters.
Step 5: Receive confirmation and keep your records
Once approved, save your confirmation. Banks will typically ask for it when you open a business account in your trade name, and it serves as your official proof of registration.
Mark your calendar for the five-year expiration date. The Secretary of State's office will send a renewal notice six months before expiration, but setting your own reminder ensures you won't be caught off guard if that notice goes to an old address.
How long does a New Hampshire trade name last? Renewal, amendment, and cancellation
| Action | When it applies | Form / process | Fee |
|---|---|---|---|
| Renewal | Every five years from registration date | Renewal form via NH QuickStart or by mail | $50 |
| Member addition | New member joins a partnership or sole proprietorship | Certificate of Addition in Members Using Trade Name | $10 |
| Member withdrawal | A member leaves a partnership or sole proprietorship | Certificate of Withdrawal in Members Using a Trade Name | $10 |
| Re-registration (name/address change) | Any change to the trade name itself or business address | File a new Trade Name Registration (Form TN-1) | $50 |
| Cancellation | Business stops operating under the trade name | Certificate of Discontinuance of Use of Trade Name (Form TN-9) | $10 |
Renewing your New Hampshire trade name
A New Hampshire trade name registration stays in force for five years from the date of filing. At the five-year mark, you must renew or the name becomes available to anyone else. You can renew online through NH QuickStart or by mail. The renewal fee is $50.
Under RSA § 349:8, if you don't renew within 30 days after expiration, your registration is discontinued and the name is considered abandoned—any other business can register it. Don't rely solely on the state's reminder notices; if your mailing address has changed, the notice may never reach you.
Amending your New Hampshire trade name
You cannot update the trade name itself or the business address by filing a quick amendment. To change either, you must file a new Form TN-1 and pay the $50 fee. Your old registration does not transfer; you begin a new five-year term under the updated information.
For ownership changes within a partnership or sole proprietorship, two specific situations have their own forms and a 10-day deadline:
- Adding a member: All members, including the new member, must file a Certificate of Addition in Members Using Trade Name within 10 days. Fee: $10 (RSA § 349:2).
- Removing a member: The partnership or association must file a Certificate of Withdrawal in Members Using a Trade Name within 10 days, signed by all members including the withdrawing member. Fee: $10 (RSA § 349:2).
Canceling your New Hampshire trade name
Under RSA § 349:2, if any person, partnership, or association ceases to do business, a certificate setting forth that fact and the date of discontinuance must be filed with the Secretary of State within 30 days, signed by all members or the sole proprietor.
The form is Form TN-9, the Certificate of Discontinuance of Use of Trade Name. It requires the owner's name, business address, and effective date of discontinuation. The filing fee is $10. You can file online through NH QuickStart or by mail.
The registration does not automatically expire because you stop using the name. Until you file the discontinuance, the name stays on the state's register under your ownership. If your business is an LLC or corporation being dissolved, the trade name registration is a separate filing—dissolving your LLC does not automatically cancel associated trade names.
DBA vs. LLC vs. legal business name in New Hampshire
| Option | What it does | Cost | Ongoing requirements | Best for |
|---|---|---|---|---|
| Trade name (DBA) | Registers a brand name you use instead of your legal name | $50 state filing fee | Renew every five years ($50) | Anyone who wants to operate under a different name without forming a new entity |
| LLC | Creates a separate legal entity with personal liability protection | $100 filing fee (Certificate of Formation) | Annual report due by April 1 each year, $100 fee | Business owners who want to separate personal assets from business debts |
| Legal business name only | Operates under the name already on file with the state | No additional filing | Varies by entity type | Businesses whose operating name exactly matches their registered legal name |
What a trade name does and doesn't do
A trade name registration is a naming record, not a business structure. It tells the state and the public that you're operating under a particular name—that's the extent of what it creates.
It does not shield your personal assets from business debts or lawsuits. If you're a sole proprietor operating as "Granite Coast Consulting" and a client sues you, your personal savings and assets are potentially on the table regardless of how well-known your trade name becomes. It also carries no trademark protection and grants no exclusive rights to the name beyond New Hampshire's borders.
What an LLC does
Forming an LLC requires filing a Certificate of Formation with the New Hampshire Secretary of State and paying the $100 filing fee. Once approved, the LLC exists as a legal entity separate from you. It can own property, enter into contracts, and absorb liability in its own name.
That separation comes with ongoing compliance obligations. New Hampshire LLC owners must file an annual report by April 1 each year, with a $100 fee. Miss the deadline and your LLC enters "Not in Good Standing" status, with a $50 penalty added on top.
These two filings are not either/or
Forming an LLC does not automatically give you the right to operate under a different brand name. If your LLC is registered as "Northern Ridgeline Properties LLC" but you market under "Northern Ridgeline Real Estate," you need both the LLC on file and a trade name registration. The LLC provides legal structure and liability protection; the trade name registration makes the operating name official under RSA Chapter 349. Neither filing replaces the other.
Neither a trade name nor an LLC provides trademark protection
Registering a name with the New Hampshire Secretary of State, whether as a trade name or as part of your LLC's Certificate of Formation, only establishes your right to use that name for business purposes in New Hampshire. Another business in a different state can legally use the same name, and if that business holds a federal trademark, it could challenge your use even within New Hampshire. If your brand has real commercial value or you plan to expand beyond the state, a federal trademark application through the USPTO is worth considering.
Choosing the right path
The decision usually comes down to one question: do you need liability protection?
If you simply want to operate under a brand name without forming a new entity, a $50 trade name registration is the straightforward answer. If personal liability is a real concern—because your business carries financial risk, works with clients under contracts, holds significant assets, or employs people—forming an LLC and adding a trade name registration on top gives you a more complete foundation.
Confusing one for the other—assuming a trade name alone protects your personal assets, or assuming your LLC name automatically covers every brand name you use—is where business owners run into problems.
What to do after you file your New Hampshire DBA
Once your trade name registration is approved, you will need to complete several administrative tasks to ensure your business operations remain compliant and well-organized.
Open a business bank account.
Most banks require a certified copy of your trade name registration to open an account in the trade name. Bring your registration confirmation and a government-issued ID. Some banks also require an EIN (Employer Identification Number), which you can obtain free from the IRS at irs.gov.
Understand your New Hampshire tax obligations.
A trade name registration does not change your tax obligations. New Hampshire has no general sales tax, but if your business sells meals, rooms, or motor vehicle rentals, you must register separately with the New Hampshire Department of Revenue Administration for a Meals & Rentals Tax license. New Hampshire also imposes a Business Profits Tax on net income above $50,000 and a Business Enterprise Tax on enterprise value. Register at revenue.nh.gov if any of these apply.
Check local licensing requirements.
New Hampshire has no statewide general business license, but many cities and towns require a local business license or home occupation permit. Contact your municipality directly. Local zoning rules vary, and some municipalities restrict the type or scale of business activity permitted in residential zones.
Use the trade name consistently.
Contracts, invoices, and marketing materials should all use the registered trade name exactly as it appears on your registration. Inconsistent use can create confusion in legal disputes and may complicate your ability to enforce contracts under the name.
Consider trademark protection.
A New Hampshire trade name registration does not prevent a business in another state from using the same name. If your brand has commercial value beyond New Hampshire, a USPTO federal trademark application provides broader protection. You can file for a trademark on your own, but LegalZoom’s trademark registration service can make the process easier.
New Hampshire DBA FAQs
What is a trade name in New Hampshire?
A trade name in New Hampshire is the official term for what most people call a DBA: a name a person or business uses to conduct business that differs from their legal name. It is registered with the New Hampshire Secretary of State under RSA Chapter 349, costs $50, and is valid for five years. It does not create a new legal entity or provide liability protection.
What is the difference between a DBA and a trade name in New Hampshire?
There is no legal difference. "DBA," "trade name," "fictitious business name," and "assumed name" all describe the same concept. New Hampshire's official term is "trade name." For a deeper look at how these terms compare, see trade name vs. business name.
Who is required to file a trade name in New Hampshire?
Any person or business entity conducting business in New Hampshire under a name other than their legal name must register that name under RSA Chapter 349. This includes sole proprietors, general partnerships, LLCs, corporations, and foreign entities operating under a name different from their registered legal name.
How do I renew a New Hampshire trade name?
File a renewal application through NH QuickStart or by mail before your registration's five-year expiration date and pay the $50 renewal fee. A registration not renewed within 30 days of expiration is discontinued and the name becomes available to others.
How do I amend or cancel a New Hampshire trade name registration?
To change the trade name itself or the business address, file a new Form TN-1 and pay $50. To add or remove a member from a partnership, file the applicable certificate within 10 days for a $10 fee. To cancel, file Form TN-9 within 30 days of ceasing use, for a $10 fee.
What are the consequences of operating without a registered trade name in New Hampshire?
Operating under an unregistered trade name can result in civil penalties under RSA Chapter 349. You may also be unable to enforce contracts under the unregistered name, and banks will typically refuse to open a business account without proof of registration.
Can I open a business bank account with a New Hampshire trade name?
Most banks will open a business account in a trade name once you provide a certified copy of your trade name registration and a government-issued ID. Some banks also require an EIN. Confirm requirements with your bank before your appointment.
Can I register more than one trade name in New Hampshire?
Yes. Each requires a separate $50 application, must independently meet the state's naming requirements, and carries its own five-year registration term.
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