If you’re starting a business, hiring employees, or forming an LLC, you’ll likely need a Tax Identification Number (TIN)—commonly called an Employer Identification Number (EIN). But many entrepreneurs wonder: how to get a Tax ID number?
What Is a Tax ID Number?
A Tax ID Number, also known as an EIN, is a 9-digit number issued by the Internal Revenue Service (IRS) to identify your business for federal tax purposes.
You’ll need it to:
- Open a business bank account
- File federal and state taxes
- Apply for business licenses
- Hire employees
How to Get a Tax ID Number
There are four main ways to apply for an EIN through the IRS:
1. Online Application (Fastest Option)
Visit the IRS EIN application portal and complete the form online.
- Available Monday to Friday, 7 a.m. to 10 p.m. EST
- Instant EIN assignment after submission
- U.S. address and SSN/ITIN required
2. By Mail
Complete Form SS-4 and mail it to:
Internal Revenue Service
Attn: EIN Operation
Cincinnati, OH 45999
Processing time: 4 weeks
3. By Fax
Fax the completed Form SS-4 to:
855-641-6935 (for U.S. applicants)
Processing time: 4 business days
4. By Phone (International Applicants Only)
Non-U.S. residents or foreign businesses without an SSN/ITIN can call the IRS at:
+1-267-941-1099
Available Monday–Friday, 6 a.m. to 11 p.m. EST
What You’ll Need
Before applying, gather:
- Legal name of your business
- Responsible party’s name and SSN or ITIN
- Business address and phone
- Type of entity (LLC, sole proprietorship, etc.)
Do You Need a Tax ID?
Yes, if your business:
- Has employees
- Operates as a corporation or partnership
- Files excise, employment, or alcohol/tobacco/firearms taxes
Final Thoughts
Now that you know how to get a Tax ID number, you can take the next step in launching your business with confidence.
