U.S. Business Licenses, State Sales Tax & EIN Guide (2026)

Guide to U.S. business compliance covering EIN applications, current FinCEN BOI rules, state sales tax economic nexus, and local licensing and permit requirements.

Executive Compliance Summary

Operating a business in the United States—whether as an expat founder, foreign national investor, or local entrepreneur—requires navigating a multi-layered legal framework spanning federal tax registration, federal anti-money laundering mandates, state sales tax nexus laws, and municipal licensing.

Failing to obtain an EIN when required, failing to comply with a BOI reporting obligation when one applies, or ignoring state sales-tax nexus requirements can result in penalties, interest, tax assessments, or other legal consequences. The specific consequence depends on the applicable federal, state, or local rule.

1. How Foreign Founders Obtain an IRS EIN Without an SSN

An Employer Identification Number (EIN) is a federal taxpayer identification number used by businesses for tax, employment, banking, and other purposes when required. Whether an EIN is required depends on the entity and its federal tax/employment circumstances; banks may also require an EIN to open a business account. If the responsible party does not have a U.S. Social Security Number (SSN) or ITIN, special IRS application rules apply:

IRS Application Methods for Non-SSN Holders:

Form SS-4 via International Phone Call: Call the IRS International EIN queue at +1-267-941-1099 (6:00 AM – 11:00 PM EST). An agent will process your completed Form SS-4 and issue your 9-digit EIN immediately over the phone.
Form SS-4 via International Fax: Fax completed Form SS-4 to the IRS international EIN fax number +1-304-707-9471 when applying from outside the United States. If you provide a fax number, the IRS generally returns the EIN information by fax in about 4 business days. The IRS no longer provides the Form SS-4 notated with the EIN.
Line 7b Instructions: Write "FOREIGN" or "N/A" on line 7b of Form SS-4. Do not leave it blank.

2. FinCEN Beneficial Ownership Information (BOI) Reporting

The Corporate Transparency Act created federal BOI reporting requirements, but FinCEN's current rule exempts all entities created in the United States from BOI reporting. Certain foreign entities formed under foreign law and registered to do business in a U.S. state or tribal jurisdiction may still be reporting companies, unless an exemption applies.

⚠️ Important: BOI penalties apply only when a reporting obligation exists. U.S.-created entities are currently exempt from BOI reporting. For a foreign reporting company that is required to file, willful violations can result in civil and criminal penalties under the applicable FinCEN rules.

Who Is a Beneficial Owner When BOI Reporting Applies?

Any individual who directly or indirectly owns or controls at least 25% of the ownership interests of the entity.
Any individual who exercises substantial control over the company (such as the CEO, President, General Counsel, or Managing Member).

3. State Economic Sales Tax Nexus Thresholds (Wayfair Ruling)

Following South Dakota v. Wayfair, Inc., physical presence is not necessarily required for a state to impose sales-tax collection duties on a remote seller. Each state establishes its own economic-nexus thresholds and determines which products or services are taxable. Remote sellers should verify the current rule for the particular state and type of sale:

State	Gross Sales Threshold	Transaction Count Threshold	Filing Frequency
California	$500,000 USD in combined sales of tangible personal property for delivery into California	None	Varies by account
Texas	$500,000 USD	None	Assigned by Texas Comptroller
New York	More than $500,000 USD	More than 100 sales	Periodic; assigned by NY Tax Department
Florida	$100,000 USD	None	Varies by registration
Illinois	$100,000 USD	None — 200-transaction threshold removed effective Jan. 1, 2026	Periodic; assigned by Illinois Department of Revenue
Other States	State-specific	State-specific	Varies by state

4. Local Municipal & County Business Licenses

In addition to federal and state requirements, a business may need local licenses, registrations, zoning approvals, or permits depending on its location and activities:

General Business License / Tax Certificate: Issued by the city finance department where your primary office or remote employees are located.
Zoning & Home Occupation Permits: Required if running a business from a residential home or apartment.
Fictitious Business Name (DBA): May need to be registered with the applicable state or local authority if the business operates under a name different from its legal LLC/C-Corp name.

Official Statutory References & Authorities

🏛️ Internal Revenue Service (IRS): IRS Form SS-4 EIN Application Instructions
🏛️ Financial Crimes Enforcement Network (FinCEN): Current FinCEN BOI Reporting Guidance
🏛️ U.S. Supreme Court: South Dakota v. Wayfair, Inc. (138 S. Ct. 2080) Opinion
🏛️ Small Business Administration (SBA): SBA State & Federal License Directory

Frequently Asked Questions

Applicants whose principal place of business is outside the United States cannot use the IRS online EIN application. They may apply by telephone at +1-267-941-1099, or submit Form SS-4 by the IRS-approved fax or mail method. Follow the current Form SS-4 instructions for Line 7b if the responsible party does not have and is ineligible for an SSN or ITIN.

Under FinCEN's current Corporate Transparency Act rules, entities created in the United States are exempt from BOI reporting. Certain entities formed under foreign law and registered to do business in a U.S. state or tribal jurisdiction may still be reporting companies, subject to applicable exemptions. Current FinCEN rules also provide that reporting companies do not report U.S. persons as beneficial owners.

Under South Dakota v. Wayfair, Inc., states can require qualifying remote sellers to collect and remit sales tax when they meet the state's economic-nexus requirements. Thresholds and measurement periods vary by state and may be based on sales, transactions, or other criteria.

Business-license and permit requirements vary by state, county, city, business activity, and location. Some jurisdictions require a general business license or tax registration, while others do not. Zoning, home-occupation, health, construction, professional, environmental, and industry-specific permits may apply depending on the activity. A DBA or fictitious-name filing may also be required under the applicable state or local law when operating under a name different from the legal entity name.

A Fictitious Business Name (DBA, Doing Business As, or trade name) is a registration that may be required when a business operates under a name different from its legal entity name. DBA requirements, exemptions, filing offices, and publication rules vary by state and locality; the filing may be handled by a county, city, Secretary of State, or another designated authority.

Delaware LLCs must pay an annual flat Franchise Tax of $300 due every year by June 1, regardless of revenue. Wyoming LLCs generally have a $60 minimum annual report fee due on the first day of the anniversary month of formation.

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