An Employer Identification Number (EIN) is essential for most U.S. businesses. It’s used to open a business bank account, file taxes, hire employees, and apply for licenses. If you’re starting a business or forming an LLC, you’re probably asking: how do I obtain an EIN number?
Here’s everything you need to know.
What Is an EIN Number?
An EIN (also called a Federal Tax ID Number) is a 9-digit number issued by the IRS to identify your business entity. Think of it as your business’s Social Security Number.
You’ll need an EIN if:
- You have employees
- You operate as an LLC, corporation, or partnership
- You file business tax returns
- You open a business bank account
- You apply for business licenses
Step-by-Step: How to Obtain an EIN Number
1. Determine If You Need One
Check the IRS guidelines to confirm you need an EIN. Most businesses do, especially if they plan to scale, hire employees, or operate as an entity other than a sole proprietorship.
2. Apply Online via the IRS Website
The fastest and easiest way to obtain an EIN is through the IRS EIN Assistant online tool.
- Visit: https://www.irs.gov/businesses/small-businesses-self-employed/apply-for-an-employer-identification-number-ein-online
- Complete the application (takes about 10–15 minutes)
- Submit it, and you’ll get your EIN immediately
Note: The IRS EIN online portal is only available Monday to Friday, 7 AM to 10 PM EST
3. Apply by Fax or Mail (If Outside the U.S. or Cannot Apply Online)
- By fax: Send Form SS-4 to the IRS at (855) 641-6935
- By mail: Send to:
Internal Revenue Service
Attn: EIN Operation
Cincinnati, OH 45999
Processing takes up to 4 weeks via mail or 4 business days via fax.
Is There a Cost to Obtain an EIN?
No. Getting an EIN directly from the IRS is 100% free. Be cautious of third-party websites that charge fees—they are not affiliated with the IRS.
What Documents Are Needed?
To apply for an EIN, you’ll need:
- Legal business name
- Business structure (e.g., LLC, sole proprietorship)
- Responsible party’s SSN or ITIN
- Mailing address
- Business activity type
Final Thoughts
So, how do I obtain an EIN number? It’s simple: apply online through the IRS website for instant issuance, or use mail/fax methods if needed. Make sure your business information is accurate and consistent across all documentation.
Getting your EIN is the first official step in building a compliant and legitimate business.
