Introduction
Verifying a Tax Identification Number (TIN)—whether it’s for a business (EIN) or an individual (SSN or ITIN)—is often necessary for payroll, tax reporting, or compliance. If you’re asking, how do I verify a tax identification number, this guide will explain the process for businesses and individuals step by step.
What Is a Tax Identification Number?
A Tax Identification Number (TIN) is a number issued by the Internal Revenue Service (IRS) used to track tax obligations. Types of TINs include:
- EIN (Employer Identification Number) – for businesses, LLCs, nonprofits
- SSN (Social Security Number) – for U.S. individuals
- ITIN (Individual Taxpayer Identification Number) – for non-resident individuals not eligible for an SSN
How to Verify an EIN (Employer Identification Number)
To verify the EIN of a business:
1. Use the IRS TIN Matching Program
- For authorized businesses only
- Access via the IRS e-Services
- Requires registration with IRS and is used to verify EIN and name combinations before filing 1099 forms
2. Check Official Documents
- Look at tax returns, CP 575 confirmation letter, or IRS correspondence
- Banks and financial institutions can also provide EINs on file
3. Contact the Business Directly
- Ask the company to confirm its EIN, especially if you are a vendor, contractor, or investor
How to Verify an SSN or ITIN
1. Use the SSA’s SSN Verification System (for Employers Only)
- Available to employers via Social Security Business Services Online
- Helps confirm the SSN of an employee for payroll and W-2 reporting
2. No Public Search for ITINs
- The IRS does not offer a public lookup for ITINs
- ITINs can only be verified through official IRS or tax professional channels
Can I Call the IRS to Verify a TIN?
Yes. The IRS may confirm EINs over the phone if you are an authorized party:
- Call: 800-829-4933 (Business & Specialty Tax Line)
- Hours: Monday–Friday, 7:00 a.m. – 7:00 p.m. local time
Why Is TIN Verification Important?
- Prevents filing errors and IRS penalties
- Ensures proper tax reporting for contractors, employees, and vendors
- Protects against identity fraud
Final Thoughts
If you’ve been asking, how do I verify a tax identification number, the method depends on whether it’s an EIN, SSN, or ITIN. For most business needs, the IRS TIN Matching Program or SSA employer tools are the safest options. Always handle TINs with care to protect privacy and avoid legal issues.
