Introduction
An Employer Identification Number (EIN) is a unique identifier issued by the IRS for businesses. It acts as a tax ID number for businesses, similar to how a Social Security Number (SSN) functions for individuals. Having an EIN is crucial for a variety of business activities, including tax reporting, opening a business bank account, applying for business credit, and hiring employees. Even if you don’t have employees, obtaining an EIN can help separate your personal and business finances, enhancing credibility and protecting your SSN from unnecessary exposure.
This guide will walk you through the process of obtaining an EIN, including who needs one, how to apply, and key considerations for business owners and freelancers. By the end, you’ll have a clear understanding of whether you need an EIN, how to apply, and how to use it effectively for your business operations.
What is an EIN Number?
An EIN, or Employer Identification Number, is a nine-digit number assigned by the IRS to businesses and certain other entities. It serves as a business’s tax ID, similar to how a Social Security Number (SSN) functions for individuals.
Who Needs an EIN?
An EIN is required or recommended for several types of individuals and entities, including:
- Business owners operating as LLCs, corporations, or partnerships: These business structures are legally required to have an EIN to file taxes, hire employees, and manage financial transactions.
- Freelancers and self-employed individuals: While not always required, obtaining an EIN is highly recommended for privacy and professionalism. It allows freelancers to separate personal and business finances and avoid using their SSN for business dealings.
- Nonprofits and trusts: Charitable organizations, religious institutions, and certain types of trusts must have an EIN to comply with IRS regulations and maintain tax-exempt status.
- Employers hiring workers: Any business that hires employees is required to have an EIN for payroll tax reporting and compliance with employment laws.

How to Get an EIN Number
Step 1: Determine If You Need an EIN
An EIN is required for businesses structured as an LLC, corporation, or partnership, as well as for any business that hires employees. Even sole proprietors and freelancers who don’t legally require one may find it beneficial for tax and privacy reasons. If you plan to open a business bank account or apply for business credit, having an EIN can make the process smoother and more professional.
Step 2: Choose Your EIN Application Method
You can apply for an EIN using one of the following methods:
- Online: This is the fastest and most convenient option, available for free through the IRS website. You will receive your EIN immediately upon completing the application.
- Fax: If you prefer to submit a paper application, you can fax Form SS-4 to the IRS. Processing typically takes about four business days, and you’ll receive your EIN via fax reply.
- Mail: Mailing Form SS-4 to the IRS is an option, but it has the longest processing time—typically around four weeks. This method is best suited for those who do not need an EIN immediately.
- Phone: International applicants who do not have a U.S. address must apply via phone by calling the IRS. This method is not available for U.S.-based applicants.
Step 3: Fill Out Form SS-4
Form SS-4 is the official application for an EIN. When filling it out, you’ll need to provide:
- Your legal business name
- Business structure (LLC, sole proprietorship, corporation, etc.)
- Reason for applying (e.g., starting a new business, hiring employees)
- Business address and responsible party information
Make sure all information is accurate, as errors may delay processing.
Step 4: Submit Your EIN Application
Once you’ve completed Form SS-4, submit it based on the method you’ve chosen. If you apply online, you’ll receive your EIN instantly. Faxed applications typically take four business days, while mailed applications may take several weeks. International applicants who apply by phone will receive their EIN upon verification of their business details.
How to Find My EIN Number
If you’ve misplaced your EIN, there are several ways to locate it:
- IRS EIN confirmation letter: When you receive your EIN, the IRS sends a confirmation letter. If you still have this document, it will contain your EIN.
- Business bank statements: If you used your EIN to open a business bank account, your bank statements may display the EIN.
- Previous tax returns: If you’ve already filed business tax returns, your EIN will be listed on these documents.
- Payroll or business loan documents: If you have employees or applied for business financing, your EIN may be recorded in payroll records or loan documents.
- Calling the IRS Business & Specialty Tax Line: If you cannot locate your EIN through the above methods, you can contact the IRS at 800-829-4933 (Monday through Friday, 7:00 a.m. to 7:00 p.m. local time). You will need to verify your identity before they can provide your EIN.
Can I Put My EIN on the W-9 Instead of My SSN?
Yes, business owners can use their EIN instead of their SSN on Form W-9. This is particularly beneficial for protecting personal privacy, as it reduces the risk of identity theft. Using an EIN instead of an SSN also enhances professional credibility, making your business appear more established when dealing with clients, vendors, and financial institutions.
How Much Does It Cost to Get an EIN?
Applying for an EIN is completely free when done directly through the IRS. Be cautious of third-party services that charge unnecessary fees for the application process. Some companies try to take advantage of business owners by charging for EIN applications, but there is no cost when applying directly through the IRS website or submitting Form SS-4 by mail or fax.
Should I Get an EIN or LLC First?
It’s generally recommended to form your LLC first, as the EIN application requires a registered business name. However, in some cases, an individual may apply for an EIN first if needed, such as when they plan to operate as a sole proprietorship before officially registering an LLC. If you apply for an EIN first and later form an LLC, you may need to update your EIN information with the IRS.
Conclusion
Obtaining an EIN is a straightforward process that benefits business owners and freelancers alike. Apply directly through the IRS for free to avoid unnecessary fees. If you need additional guidance on business formation and tax setup, consult a professional for assistance.
FAQs
What is an EIN number?
An EIN is a unique tax identification number assigned to businesses by the IRS.
How to find my EIN number?
Check your IRS confirmation letter, tax returns, or call the IRS Business & Specialty Tax Line.
Can I put my EIN number on the W-9 instead of my SSN?
Yes, using an EIN can help protect your privacy and add credibility.
How much does it cost to get an EIN?
Applying for an EIN is free through the IRS.
Should I get an EIN or LLC first?
Forming an LLC first is recommended, as you’ll need an official business name for the EIN application.