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Validate United States TIN (SSN / EIN / ITIN)

Free online Social Security Number / Employer Identification Number validator. Instant validation using OECD-compliant rules for United States tax identification numbers.

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Validate SSN / EIN / ITIN

Enterprise checks for United States tax identification numbers.

Instant one-by-one format validation

Country

United States

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SSN / EIN / ITIN format check

Enter a SSN / EIN / ITIN to validate for United States

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Paste values with or without separators. Validation also checks a normalized value.

Use a real SSN / EIN / ITIN sample to verify format compliance before filing.

About United States TIN (SSN / EIN / ITIN)

The Social Security Number / Employer Identification Number is the official tax identification number used in United States. Format: SSN: 9 digits (XXX-XX-XXXX), EIN: 9 digits (XX-XXXXXXX)

Valid Examples

  • 123-45-6789
  • 12-3456789

Invalid Examples

  • 000-00-0000 (Invalid SSN)
  • 12-345678 (Too short)

Common Use Cases

  • Tax filing
  • Employment verification
  • Banking
  • Credit applications

Official source: IRS

Frequently Asked Questions

What is a US TIN?
A US Tax Identification Number (TIN) can be a Social Security Number (SSN), Employer Identification Number (EIN), or Individual Taxpayer Identification Number (ITIN). SSNs are for individuals, EINs for businesses.
How do I validate a US SSN format?
A valid SSN follows the format XXX-XX-XXXX where X is a digit. The first three digits cannot be 000, 666, or 900-999. Our validator checks both format and these rules.
What's the difference between SSN and EIN?
SSN (Social Security Number) is issued to individuals for tax and social security purposes. EIN (Employer Identification Number) is issued to businesses, trusts, and other entities.

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