EIN Application Guide for US Companies 2026

For foreigners who own or plan to establish a business in the United States, completing an EIN application is often an important step after company formation. An Employer Identification Number (EIN) is commonly used for federal tax matters and other business activities, such as opening a business bank account.

However, not every company follows the same application process. Foreign-owned businesses may have different requirements, especially when the responsible party does not have a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). Therefore, it is important to understand the EIN application process before submitting Form SS-4.

What Is an EIN?

An EIN, or Employer Identification Number, is a unique nine-digit federal tax identification number issued by the Internal Revenue Service (IRS). The IRS uses this number to identify business entities for federal tax administration.

Many U.S. businesses need an EIN, even if they do not have employees. For example, LLCs, corporations, partnerships, and other business entities may need an EIN based on their tax structure and business activities. An EIN works as an important business identifier. Companies may use it when dealing with tax authorities, banks, financial institutions, suppliers, and other business partners.

What Is an EIN Application Used For?

A successful EIN application allows a business to obtain its federal tax identification number. Companies may need an EIN for several important activities.

Federal Tax Reporting

Businesses that have federal tax filing obligations generally use their EIN when submitting tax returns and other tax-related documents to the IRS. The exact filing requirements depend on the company’s structure and tax classification. For example, LLCs and corporations may have different federal tax reporting responsibilities.

Opening a Business Bank Account

Many U.S. banks request an EIN when a company applies for a business bank account. However, bank requirements can vary depending on the institution, the business structure, and the owners’ residency status. Foreign-owned businesses should confirm the bank’s current requirements before beginning the account opening process.

Hiring Employees

Companies that hire employees generally need an EIN for payroll and employment tax reporting. The EIN helps government agencies connect employment tax records with the correct business entity.

Applying for Business Licenses

Some business licenses and permits may require an EIN. However, requirements vary by state, industry, and local authority. Therefore, a company should always check the rules that apply to its specific business activities.

Establishing Business Credit

Some lenders and credit card providers may request an EIN when reviewing a business application. The number can also support a company’s financial and tax records.

However, an EIN does not automatically create business credit. A company usually needs to build its credit history through ongoing financial activity.

Who Can Complete an EIN Application?

Different business entities can apply for an EIN, including:

Limited liability companies (LLCs)
Corporations
Partnerships
Sole proprietorships
Nonprofit organizations
Other eligible business entities

Foreign-owned U.S. companies can also apply for an EIN. However, the application method may differ when the responsible party does not have an SSN or ITIN. Because the IRS requirements can vary based on the applicant’s situation, foreign entrepreneurs should confirm which application method applies before submitting Form SS-4.

EIN Application Requirements

Before starting the EIN application, prepare the basic information required for Form SS-4. In most cases, you may need:

The legal name of the company
The company’s business or mailing address
The responsible party’s information
The company’s legal structure
The reason for applying for an EIN
The date the business was formed or acquired
A description of the company’s main business activity
Information about expected employees, if applicable

For a newly established U.S. company, you may also need the company’s formation documents and registration details.

How to Complete an EIN Application

The EIN application process can vary depending on the company’s ownership structure and the responsible party’s tax identification information. However, the basic steps remain similar.

Step 1: Confirm Your Eligibility

First, confirm that your business is eligible to apply for an EIN. In general, the business must have a valid reason for requesting a federal tax identification number. You should also identify the responsible party and confirm which application options are available based on that person’s information.

Step 2: Prepare the Required Information

Next, collect the company and responsible party information required for Form SS-4. Check all details carefully before submission.

For example, the legal company name and business address should match the company’s formation records. Consistent information can help reduce unnecessary delays.

Step 3: Choose an EIN Application Method

The IRS offers different ways to submit an EIN application, including:

Online application, for applicants who meet the IRS online eligibility requirements
Fax application
Mail application
International telephone application, where applicable

The online method is often the fastest option for eligible applicants. However, not all foreign applicants can use the online EIN application system.

Step 4: Complete Form SS-4

Form SS-4 is the main form used to request an EIN. It asks for information about the company, responsible party, entity type, business purpose, and other relevant details.

Complete the form carefully. Errors in names, addresses, or entity information can cause processing delays or create problems later.

Step 5: Submit the EIN Application

After completing Form SS-4, submit the EIN application using the method that applies to your situation.

The processing time depends on the submission method and the information provided. Some eligible online applications receive an EIN immediately after successful submission, while fax, mail, and international applications may take longer.

EIN Application Tips for Foreign-Owned US Companies

Foreign entrepreneurs often face additional challenges when applying for an EIN. For example, the responsible party may not have an SSN or ITIN, which can affect the available application methods.

Before submitting your application, make sure that:

The company has been properly formed in the United States.
All company information is consistent across registration documents.
The responsible party details are accurate.
The selected application method is available to foreign applicants.
The business purpose and entity type are clearly identified.

If you are registering a U.S. company and need support with the next steps, IngStart provides company formation and compliance services for international entrepreneurs. Through its online platform, businesses can manage U.S. company registration, compliance requirements, and related services more conveniently. This can be especially helpful for founders who want to reduce administrative work while focusing on their business.

Key Points About the EIN Application

An EIN is an important federal tax identification number for many U.S. businesses. It can support tax reporting, business banking, employment, licensing, and other business activities.

For foreign entrepreneurs, the EIN application process may require additional attention because eligibility and available application methods can depend on the responsible party’s tax identification information. Therefore, prepare the correct company details, complete Form SS-4 carefully, and choose the appropriate application method for your situation.

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If you still have questions, please contact our team on WhatsApp at +1 213 751 2111. We’ll help you find the right solution for your business and keep your company compliant as it grows.