How to Get an EIN for a U.S. Small Business Without Paying a Middleman

An Employer Identification Number (EIN) is a nine-digit number assigned by the Internal Revenue Service (IRS) that identifies a business entity for tax and reporting purposes. It serves the same function for a business that a Social Security Number (SSN) serves for an individual. The IRS describes the EIN as the equivalent of a Social Security number for a business, and it is required on virtually every federal and many state forms that a business files.

Having an EIN is essential for almost every business that operates in the United States, regardless of size or structure. The EIN is required to open a business bank account, apply for business licenses, file business tax returns, apply for business loans and lines of credit, hire employees, establish business credit, and register for a merchant account to accept credit card payments. Without an EIN, a business cannot fully separate its finances from its owner's personal finances, which is a critical step in protecting personal assets through limited liability.

The EIN is also used on Form W-9 when your business provides services to another business as a contractor. The hiring business uses the EIN to report payments to your business on Form 1099-NEC at the end of the tax year. Having an EIN signals professionalism to clients, vendors, and financial institutions, and it is necessary for businesses that want to establish credit in their business name rather than relying on personal credit scores.

Who Needs an EIN

The IRS requires an EIN for several categories of business entities, while others may use the owner's SSN instead. Understanding whether you need an EIN depends on your business structure and circumstances.

Entities that must have an EIN:

• Corporations (C-Corp and S-Corp) — required regardless of size or number of employeesPartnerships and multi-member Limited Liability Companies (LLCs) — required because the entity is a separate tax-paying unitBusinesses with employees — any business that hires employees, even part-time, must have an EIN to report payroll taxesEstates and trusts — required for tax reporting purposesNonprofit organizations, including 501(c)(3) organizations — required for tax-exempt status applicationsBusiness entities that file certain tax returns, including Employment, Excise, and Alcohol, Tobacco, and Firearms taxesEntities that withhold taxes on income paid to non-resident aliens

Entities that can use an SSN instead:

• Single-member LLCs that are disregarded entities for tax purposes can use the owner's SSNSole proprietorships with no employees can use the owner's SSN for business taxesIndependent contractors without employees may use their SSN on Form W-9

However, even if you are legally allowed to use an SSN, obtaining an EIN is strongly recommended for privacy, professionalism, and future-proofing your business. Using your SSN on W-9 forms exposes your personal Social Security number to every client that hires you. An EIN provides a layer of privacy protection that is valuable for any business owner.

How to Apply for an EIN Free Through the IRS

The IRS offers a free, online EIN application process called the IRS EIN Assistant. This service is available during specific hours (currently Monday through Friday, 7:00 AM to 11:00 PM Eastern Time) and allows most business entities to receive their EIN immediately upon completion of the application.

Online Application Process

Before beginning the online application, you need to ensure that your business is located in the United States or its territories, and that the principal officer or owner has a valid Taxpayer Identification Number (SSN, ITIN, or EIN). The online application process takes approximately 15-20 minutes and consists of the following steps.

First, visit the IRS EIN Assistant at irs.gov/ein and select the option to apply online. You will be asked to select your business entity type from a list of options, including sole proprietorship, partnership, corporation, LLC, estate, trust, and others. Selecting the correct entity type is critical because it determines the tax classification of your business and affects how you file tax returns in the future.

Next, you will enter information about the responsible party for the business — the person who ultimately owns, controls, or directs the entity. For sole proprietorships and single-member LLCs, this is the owner. For corporations, this is typically a principal officer. The responsible party's SSN, ITIN, or EIN is required for the application.

You will then provide information about the business, including the legal name of the entity, any trade name or DBA (Doing Business As) name, the physical address of the business (not a P.O. box), the county and state where the business is located, and the name and title of the principal officer or owner. You will also need to provide the mailing address for the business if it is different from the physical address.

Finally, you will select the reason for applying for an EIN, which determines your business's tax classification. Common reasons include starting a new business, hiring employees, creating a trust, opening a bank account, meeting a bank requirement, or changing the type of ownership or organization. After reviewing all information for accuracy, you submit the application. If everything is correct, the system generates your EIN immediately.

Fax and Mail Application Process

If you cannot apply online — for example, if the principal officer does not have a valid SSN, ITIN, or EIN — you can apply by fax or mail using Form SS-4. The fax application typically takes four business days or less, while the mail application takes approximately four to five weeks.

To apply by fax, complete Form SS-4 and fax it to the appropriate IRS fax number for your state, which is listed on the IRS website. Include your fax number on the form so the IRS can return your EIN confirmation. To apply by mail, send the completed Form SS-4 to the IRS address listed for your state. The mailed form is processed more slowly, so plan accordingly if you need your EIN by a specific date.

Comparing Free IRS Application vs. Paid Services

The IRS EIN application is completely free when done directly through the IRS. However, many third-party websites and services charge fees ranging from $50 to $500 or more to obtain an EIN on behalf of a business. Understanding the value (or lack thereof) of these services is important for making an informed decision.

| Method | Cost | Time to Receive EIN | Who Should Use |

|---|---|---|---|

| IRS Online EIN Assistant | Free | Immediate | Most businesses with online access |

| Form SS-4 by Fax | Free | 4 business days | Businesses unable to apply online |

| Form SS-4 by Mail | Free | 4-5 weeks | Businesses without fax capability |

| Third-party website | $50-$500+ | Varies | Rarely necessary |

Third-party EIN services are almost always unnecessary for most business owners. The IRS has designed the online application to be straightforward, and the entire process takes less than 30 minutes. Paying someone else to fill out the same form you can fill out yourself wastes money that could be better invested in your business. The only legitimate use case for a third-party service is if your business has a complex ownership structure that requires professional guidance, or if the responsible party does not have a valid SSN, ITIN, or EIN and cannot obtain one.

Some third-party services also bundle EIN applications with other services such as LLC formation, business registration, or compliance packages. If you are already paying for an LLC formation service that includes an EIN application, the incremental cost may be reasonable. However, standalone EIN application services that charge $200 or more for filling out a free IRS form represent poor value for money.

Common Mistakes to Avoid

Many business owners make avoidable errors during the EIN application process. Understanding these common mistakes can save you time and prevent the need to correct information after receiving your EIN.

One common mistake is selecting the wrong entity type during the online application. For example, a single-member LLC that is taxed as a sole proprietorship might incorrectly select "LLC" instead of "Sole Proprietor/Independent Contractor." This error does not change your actual tax classification, but it may create confusion when you file your tax returns later. Always select the entity type that matches how the IRS will tax your business.

Another common mistake is providing an incorrect physical address. The IRS requires a physical street address, not a P.O. box, for the principal place of business. If you work from home, you can use your home address. If you use a virtual mailbox service, the IRS does not accept P.O. boxes or virtual mailbox addresses as the principal place of business. You must provide a physical location where business records are kept.

Failing to keep the EIN confirmation letter is another frequent error. After receiving your EIN online, the IRS provides a confirmation letter called CP 575 or CP 575E. You should print and save this letter with your business records, as you will need it to open a business bank account, apply for loans, and provide proof of your EIN to vendors and government agencies.

Verifying and Using Your EIN

After receiving your EIN, you should verify that the IRS has correctly recorded your information. You can verify your EIN by calling the IRS Business and Specialty Tax Line at 800-829-4933. Have your EIN and business information ready when you call.

Your EIN will remain with your business for its entire life, regardless of changes in ownership, location, or management. You do not need to apply for a new EIN when you move your business to a different state, change the name of your business (with proper notification), or add or remove owners. However, you will need a new EIN in specific situations: if your business ownership changes (such as a partnership taking on a new partner), if your business structure changes (such as a sole proprietorship incorporating), or if you create a new business entity.

The EIN should be used on all business tax forms, bank account applications, credit applications, and government forms. Never use your SSN on business documents once you have obtained an EIN, as this defeats the purpose of separating your business identity from your personal identity.