1. Home
  2. /
  3. Formation
  4. /
  5. Get EIN Number Online — US Company Formation Guide

Get EIN Number Online — US Company Formation Guide

An Employer Identification Number (EIN), also known as a Federal Tax Identification Number, is crucial for businesses operating in the United States. It's like a Social Security number for your business, used by the IRS to identify taxpayers who are required to pay taxes related to business activities. Obtaining an EIN is a fundamental step for most new businesses, whether you're forming an LLC in Delaware, a C-Corp in California, or operating as a sole proprietor needing to hire employees. It's essential for opening business bank accounts, filing business tax returns, and applying for business licenses and permits. Check out our guide on LLC registration in Alabama for step-by-step instructions. The good news is that for most business structures, you can get an EIN number online directly from the Internal Revenue Service (IRS) for free. The online application process is generally the fastest and most convenient way to receive your EIN. This guide will walk you through the steps, requirements, and considerations for successfully obtaining your EIN online, ensuring your business is compliant from the start.

What is an EIN and Why Your Business Needs One

An Employer Identification Number (EIN) is a unique nine-digit number assigned by the IRS to business entities operating in the United States for identification purposes. Think of it as the Social Security number for your business. It's required for a variety of essential business functions. For instance, if your business is structured as a corporation or a partnership, an EIN is mandatory. Even if you're a sole proprietor or an LLC owner, you'll need an EIN if you plan to hire employees, operate a Keogh plan, or are involved in certain types of organizations like trusts or estates. Beyond federal tax purposes, an EIN is critical for operational necessities. Many banks require an EIN to open a business checking account, distinguishing your personal finances from your business finances. Our resource on forming an LLC in Alaska breaks this down further. This separation is vital for maintaining liability protection, especially for LLCs and corporations. Furthermore, obtaining an EIN is often a prerequisite for applying for state and local business licenses and permits. It also plays a role in establishing business credit, allowing your company to secure loans or lines of credit independently of your personal credit history. Without an EIN, conducting many standard business transactions becomes significantly more challenging, if not impossible. For example, a freelance graphic designer forming an LLC in Texas might need an EIN to open a business bank account under their LLC's name, even if they don't plan to hire employees immediately.

How to Get an EIN Number Online for Free

The primary and most efficient method to obtain an EIN is directly through the IRS website. This process is entirely free of charge. You will need to visit the official IRS 'Apply for an Employer Identification Number (EIN) Online' page. Ensure you are on IRS.gov to avoid third-party sites that may charge a fee for this service. The online application is available Monday through Saturday, typically between 7:00 AM and 10:00 PM Eastern Time. To begin the online application, you must have a valid Taxpayer Identification Number (TIN), such as a Social Security number (SSN) or an Individual Taxpayer Identification Number (ITIN), for the responsible party. If you're exploring this further, our guide on forming an LLC in Arizona is a helpful next step. The responsible party is typically the individual who controls, manages, or directs the applicant entity and its tax-related activities. You'll also need to provide the legal name and address of your business, the type of business entity (e.g., LLC, Corporation, Partnership), and the reason for applying (e.g., starting a new business, hiring employees). The application takes about 5-10 minutes to complete. Upon successful submission and validation, you will receive your EIN immediately on the screen. It's highly recommended to print this confirmation page and save it securely, as you will not receive a physical copy by mail immediately.

Eligibility Requirements for Online EIN Application

To be eligible to get an EIN number online through the IRS portal, your business entity must meet certain criteria. Firstly, the business must have a physical presence or be located in the United States or its territories. This means entities formed or operating primarily outside the U.S. cannot use the online system. Secondly, the 'responsible party' applying for the EIN must possess a valid Social Security number (SSN) or an Individual Taxpayer Identification Number (ITIN). This individual is typically the principal officer, general partner, grantor, or owner of the entity.

There are specific entity types that can apply online, including sole proprietorships (if they have an SSN/ITIN), partnerships, Limited Liability Companies (LLCs), and corporations (S-corp, C-corp). Estates and trusts can also apply online if the trustee or executor has an SSN/ITIN. However, certain entities, such as those without a U.S. TIN for the responsible party, or certain types of foreign entities, may need to apply via fax or mail using Form SS-4. It’s important to note that if you are applying for an EIN for a business that is already established, you must use the EIN of that business. If you are forming a new business, like an LLC in Florida or a non-profit in New York, you will apply for a new EIN. Each EIN is unique to the business entity it is assigned to.

Information Needed for the EIN Application

Gathering the necessary information before starting the online EIN application will streamline the process. You'll need the full legal name and address of your business entity. This should match the information filed with your state when forming your LLC or corporation, for example, in states like Wyoming or Nevada.

You must also provide the name and title of the responsible party. As mentioned, this individual must have a valid SSN or ITIN. You'll need their SSN/ITIN, name, and contact information (phone number and email address). The application will also ask for the type of business entity (e.g., Sole Proprietor, Partnership, LLC, S-Corp, C-Corp, Non-profit). You'll need to specify the reason for applying for the EIN, such as starting a new business, hiring employees, or changing the business structure. Some businesses may also need to provide details about their business activities, such as the principal activity code. For example, if you are forming a tech startup in California, you would select the relevant industry. Having all this documentation ready ensures you can complete the application accurately and efficiently, usually within minutes.

Alternatives to the Online EIN Application Process

While the online application is the most efficient way to get an EIN number, the IRS provides alternative methods for those who cannot apply online or prefer a different approach. If the responsible party does not have an SSN or ITIN, or if your business entity is not eligible for online application (e.g., certain foreign entities), you can apply by fax or mail. To do this, you must complete Form SS-4, Application for Employer Identification Number. This form requires all the same information as the online application but must be mailed or faxed to the appropriate IRS service center.

Faxing the completed Form SS-4 typically results in receiving your EIN within 4-5 business days. Mailing the form can take longer, often several weeks. The IRS also offers a telephone option for international applicants who do not have a U.S. mailing address or a responsible party with an SSN/ITIN. This process involves calling the IRS Business & Specialty Tax Line during their operating hours. The IRS representative will ask you the questions from Form SS-4 over the phone, and if approved, they will provide you with your EIN verbally. Remember, regardless of the method used, obtaining an EIN from the IRS is always free. Be wary of any services that charge a fee for this basic application.

Using Your EIN Number and Important Maintenance

Once you receive your EIN, it becomes a critical identifier for your business across all federal tax filings and many operational activities. You'll use it when filing your federal tax returns, such as Form 1120 for corporations or Form 1065 for partnerships. It's also necessary when reporting employment taxes to the IRS, including income tax withholding, Social Security, and Medicare taxes. As previously mentioned, it's essential for opening business bank accounts, applying for business loans, and obtaining necessary business licenses and permits, which vary by state and locality. For instance, a restaurant opening in Illinois will need its EIN for various health and business permits.

Maintaining the accuracy of your EIN information with the IRS is crucial. If there are significant changes to your business structure, such as converting your LLC to a C-Corp or vice versa, or if there are changes in the responsible party, you may need to notify the IRS. While you generally don't 'renew' an EIN, significant structural changes might necessitate obtaining a new EIN. For example, if a sole proprietorship obtains an EIN and then incorporates, the new corporation will need its own distinct EIN. It's vital to keep your EIN record up-to-date by informing the IRS of any changes. Failure to do so can lead to penalties and complications with tax filings. Always keep your EIN confirmation letter in a secure place, as it's the only official document you receive from the IRS confirming your number.

Key Concepts: Business Formation

US Business Formation guides entrepreneurs through the business formation process with actionable steps. Key components include LLC formation, entity registration, and state filing, each playing a critical role in the business formation process. Understanding liability protection and tax optimization is essential, as these factors directly impact legal compliance.

When evaluating business formation options, factors such as business entity types and formation process should inform your decision-making process.

Entity Relationships

  • Business Formation requires LLC formation
  • Business Formation includes entity registration
  • Business Formation establishes state filing
  • Business Formation defines business structure selection

Quick answers

What do I need to know about Get Ein Number Online for my business?

Understanding Get Ein Number Online is essential for business compliance and operational success. The specific requirements vary by state and industry.

How does Get Ein Number Online affect my business formation?

This aspect of business formation directly impacts your legal standing, tax obligations, and operational flexibility.

Start your formation with Lovie — $29/month, everything included.

Explore Formation Guides

State-specific formation guides, cost breakdowns, compliance checklists, and expert comparisons — updated for 2026.

Popular Guides

  • How Long Does It Take To Get An LLC Approved — US Company
  • How Much Does It Cost To Get LLC — US Company Formation
  • Certificate Of Organization Iowa — US Company Formation
  • How to Start an LLC Kansas | Lovie — US Company Formation
  • What is an LLC? Guide to Limited Liability Companies | Lovie

LLC Formation Guides

  • How to Form an LLC for AI ML Iowa (2026) | Lovie
  • How to Form an LLC for Construction Mississippi
  • How to Form an LLC for Telehealth California (2026) | Lovie
  • How to Form an LLC for Accounting in Utah
View all →

Operating Agreements

  • Operating Agreement for Gaming Hawaii (2026) | Lovie
  • Operating Agreement for Photographer Pro Florida
View all →

C-Corp Formation Guides

  • How to Form a C-Corp for Beauty Kentucky (2026) | Lovie
View all →

Entity by Industry

  • Best Entity for LLC Vs C Corp Construction (2026) | Lovie
View all →
Browse all 9,800+ formation resources