Sole Proprietorship in New Hampshire (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 20, 2026 · Last updated Aug 20, 2026

A sole proprietorship in New Hampshire requires no state formation filing and no formation fee. New Hampshire imposes no general sales tax and does not tax wages, but a sole proprietor can owe the Business Profits Tax at 7.5% and the Business Enterprise Tax at 0.55% once gross income or receipts pass the Department of Revenue Administration filing thresholds.

What a Sole Proprietorship Is in New Hampshire

A sole proprietorship is an unincorporated business owned by one person. It is the default structure everywhere in the United States, including New Hampshire: start selling goods or services on your own account and you are a sole proprietor from that moment, whether or not you ever file a document. Because the business is not a separate legal person, every dollar of profit is yours and every debt, contract, and lawsuit is also yours personally. That simplicity is the appeal, and the absence of a liability shield is the drawback.

Nothing in New Hampshire law creates a sole proprietorship, so there is no "sole proprietor certificate" and no formation fee. What New Hampshire does regulate is what the business does: collecting tax, hiring employees, using a business name, and practising a licensed trade. Each of those triggers a separate registration, and each is covered below. If you want a liability shield instead, compare this structure with an LLC, read S-corp vs LLC, and use the glossary for the terms used here.

No State Formation Filing Required

The New Hampshire Secretary of State's Corporation Division registers corporations, limited liability companies, limited partnerships, and similar entities. It does not register sole proprietorships, because a sole proprietorship is not an entity. There is no form to file, no fee to pay, and no annual report to submit at the entity level. That is the sharpest contrast with an New Hampshire LLC, which must file a Certificate of Formation, appoint a New Hampshire registered agent, and file an annual report with the Secretary of State every April.

Because there is no registration, there is also nothing to look up: a sole proprietorship will not appear in the New Hampshire business entity search unless a trade name has been recorded. The obligations that do apply come from tax law, licensing law, and employment law rather than entity law. Compare the full setup cost against forming an entity using the New Hampshire LLC cost breakdown.

Registering a Trade Name

If you trade under your own full legal name, New Hampshire asks nothing of you on the naming side. If you use any other name — a DBA, or "doing business as" name — you may register that trade name with the Secretary of State's Corporation Division. Registration puts the name on the public record and is often what a bank asks to see before it will open an account or deposit cheques made out to the business name.

A registered trade name is a record of use, not a property right. It does not stop a competitor from using a confusingly similar brand and it does not give you rights outside New Hampshire. For that you need a state or federal trademark registration; see how to trademark a business name in New Hampshire. Confirm the current trade-name form, fee, and renewal term directly with the Secretary of State, and see New Hampshire DBA filing for the mechanics.

EIN: When a Sole Proprietor Needs One

An Employer Identification Number is a free federal tax ID issued by the IRS. A sole proprietor with no employees can normally use a Social Security number instead, so the EIN is optional. It becomes mandatory when you hire employees, file employment or certain excise tax returns, or establish a qualified retirement plan. Many banks also require one before opening a business account, and using an EIN keeps your Social Security number off every Form W-9 you hand to a client.

Applying costs nothing. The IRS online EIN assistant issues the number immediately to applicants whose principal business is in the United States and who have a valid taxpayer ID; Form SS-4 by fax or mail is the fallback. Never pay a third-party site for an EIN. See how to get an EIN in New Hampshire, the national EIN guide, and the ITIN page if you have no Social Security number.

New Hampshire Business Taxes: BPT and BET

New Hampshire's tax system is unusual twice over: there is no general sales tax, and the state does not tax wage income. Instead it taxes business activity directly, and a sole proprietorship is a "business organization" for these purposes. The Business Profits Tax (BPT) is charged at 7.5% of taxable business profits for taxable periods ending on or after December 31, 2023. For 2026, the Department of Revenue Administration set the BPT filing threshold at gross business income over $109,000; below that you do not file a BPT return.

The Business Enterprise Tax (BET) is a separate, broader tax at 0.55% on the enterprise value tax base — compensation paid, interest paid, and dividends paid. For 2026 the BET filing threshold is gross business receipts over $298,000 or an enterprise value tax base over $298,000. Both thresholds are adjusted biennially, so check the current figures each filing season. BET actually paid can be credited against BPT, which prevents most small businesses from paying the full amount of both.

Federal Income and Self-Employment Tax

For federal purposes a sole proprietorship is a disregarded activity reported on your own return. You report gross receipts and deductible expenses on Schedule C and carry the net profit to Form 1040. On that profit you owe self-employment tax of 15.3% — 12.4% Social Security up to the annual wage base plus 2.9% Medicare with no ceiling — computed on Schedule SE. One half of the self-employment tax is deductible in arriving at adjusted gross income.

Nobody withholds tax for you, so the IRS expects quarterly estimated payments on Form 1040-ES. Underpaying triggers a penalty even if you settle up in April. Model the combined federal burden with the self-employment tax calculator, read business tax basics, and see S-corp election in New Hampshire for the structure owners often adopt once profit is high enough for the payroll-tax saving to outweigh the compliance cost.

Licences, Permits, and Employees

New Hampshire has no single statewide general business licence. What applies instead is activity-specific: professional and occupational licensing boards, health permits for food service, contractor and trade licensing, and municipal permits for signage, home occupations, and zoning. Meals and rooms operators and certain other sellers must register with the Department of Revenue Administration even though there is no general sales tax. Start with the New Hampshire business licence guide and confirm local requirements with your town or city clerk.

Hiring changes the picture immediately. Employees require an EIN, federal and state employment registrations, workers' compensation coverage, and payroll withholding and reporting. Independent contractors do not, but misclassifying an employee as a contractor is one of the most common and expensive errors a small proprietor makes. Review how to start a business in New Hampshire for the full sequence.

Liability and When to Move to an LLC

The defining trade-off is personal liability. With no legal separation between you and the business, a supplier's unpaid invoice, a customer's injury claim, or a defaulted lease is a claim against your personal assets — savings, vehicles, and in many cases your home. Insurance narrows the exposure but does not create the separation that an entity does. A sole proprietorship also cannot be sold as a going entity, cannot admit a co-owner without becoming a partnership, and ends when you stop operating.

Most owners convert once revenue, contracts, employees, or physical risk grow. Converting means forming the entity, moving bank accounts, contracts, licences, and insurance into it, and adopting an operating agreement. Your federal EIN, tax registrations, and income-tax duties continue in the new structure, though you may need to notify the state tax agency that the taxpayer has changed. Before choosing a name, run the formation checklist, review single-member LLC treatment, and compare an LLC against a sole proprietorship.

Frequently Asked Questions

Do you have to register a sole proprietorship in New Hampshire?

No. New Hampshire has no formation filing that creates a sole proprietorship, and the Secretary of State's Corporation Division does not register them. You may optionally register a trade name if you operate under a name other than your own, and you must register for any tax or occupational licence your activity requires.

Does a New Hampshire sole proprietor pay income tax?

New Hampshire does not tax wage income, but a sole proprietorship can owe the Business Profits Tax at 7.5% of taxable business profits and the Business Enterprise Tax at 0.55% of the enterprise value tax base. Federal income tax and 15.3% self-employment tax still apply on Schedule C and Schedule SE.

What is the New Hampshire BPT filing threshold for 2026?

For 2026 the Department of Revenue Administration set the Business Profits Tax filing threshold at gross business income over $109,000. The Business Enterprise Tax threshold is gross business receipts over $298,000 or an enterprise value tax base over $298,000. Both are adjusted biennially.

Does New Hampshire charge sales tax on a sole proprietorship?

No. New Hampshire has no general sales tax, so a sole proprietor does not collect one on ordinary goods and services. Specific activities such as meals, rooms, and motor vehicle rentals are taxed separately and require registration with the Department of Revenue Administration.

Does a New Hampshire sole proprietor need an EIN?

Not usually. A sole proprietor with no employees can use a Social Security number. An EIN is required if you hire employees, file employment or certain excise tax returns, or set up a qualified retirement plan, and most banks ask for one before opening a business account. It is free from the IRS.

Related

• Sole proprietorship (cluster hub)
• How to form an LLC in New Hampshire
• New Hampshire DBA filing
• How to get an EIN in New Hampshire
• New Hampshire business licence
• Business tax basics
• Sole proprietorship in Hawaii (sibling)
• Sole proprietorship in Maine (sibling)

Sources

1. New Hampshire Department of Revenue Administration — Business Profits Tax (7.5% rate).
2. New Hampshire Department of Revenue Administration — Business Enterprise Tax (0.55% rate).
3. New Hampshire Department of Revenue Administration — BET and BPT Filing Threshold Adjustment ($109,000 and $298,000 for 2026).
4. New Hampshire Department of Revenue Administration — Business Taxes at a Glance.
5. New Hampshire Secretary of State — Corporation Division Forms and Fees (trade name registration).
6. New Hampshire Secretary of State — Annual Reports (entity filings; not applicable to sole proprietors).
7. New Hampshire Revised Statutes — RSA 77-A, Business Profits Tax.
8. IRS — Sole Proprietorships.
9. IRS — About Schedule C (Form 1040).
10. IRS — Self-Employment Tax (Social Security and Medicare Taxes) (15.3%).
11. IRS — About Schedule SE (Form 1040).
12. IRS — Get an Employer Identification Number (free EIN).
13. IRS — Do You Need an EIN?
14. IRS — Estimated Taxes (Form 1040-ES).
15. U.S. Small Business Administration — Choose a Business Structure.

LegalGlass provides general information for educational purposes and is not legal advice, is not a law firm, and is not a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the New Hampshire Department of Revenue Administration, the New Hampshire Secretary of State, and the IRS before acting.