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New Hampshire . Contact directory

How to reach the New Hampshire Secretary of State.

Direct phone number, hours, mailing and physical addresses, and the right phone for the right question. Plus the related New Hampshire departments most business owners need.

Primary phone
603-271-3246
Mon-Fri 8am-4pm ET
Mailing address
107 N. Main Street, Concord, NH 03301
Physical address
107 N. Main Street, Concord, NH 03301
Fax
603-271-3247

The right phone for the right question

Franchise tax and corporate income tax
603-230-5000 (NH Department of Revenue Administration, Corporate Tax)
Expedited filings
Online same business day
603-271-3246

Most calls to the New Hampshire SoS are about things File.Business can answer instantly

"What is my entity's status?"
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"When is my AR due?"
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"How do I change RA?"
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"Can I reinstate?"
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FAQ

Frequently asked questions

What is the phone number for the New Hampshire Secretary of State?
The primary phone for the New Hampshire Secretary of State, Corporation Division is 603-271-3246. Office hours are Mon-Fri 8am-4pm ET.
What are the New Hampshire Secretary of State office hours?
Office hours are Mon-Fri 8am-4pm ET. Online filings can be submitted 24/7.
What is the New Hampshire Secretary of State mailing address?
Mailing address: 107 N. Main Street, Concord, NH 03301. Physical office: 107 N. Main Street, Concord, NH 03301.
How do I speak to a person at the New Hampshire Secretary of State?
Call 603-271-3246 during business hours.
Does the New Hampshire Secretary of State offer expedited service?
Online same business day.
Can I email the New Hampshire Secretary of State?
Email contact varies by department.
Can I visit the New Hampshire Secretary of State office in person?
Yes, the physical office is at 107 N. Main Street, Concord, NH 03301.

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

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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.