Launching a SaaS?·Collect waitlist signups before you build — before.run
/./
regex.to
SandboxPatternsDetectDocs
Identity
en-US
#ein
#us
#tax
#employer

US Employer Identification Number (EIN)

Matches a US EIN (Federal Tax ID) in the NN-NNNNNNN format used by the IRS.

✓ Business tax forms✓ Contractor onboarding✓ Invoice validation
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Test String
3 matches
\d{2}digit— \d — digit (0–9) — repeated exactly 2 times · {2} — exactly 2 times
--— '-' — literal character
\d{7}digit— \d — digit (0–9) — repeated exactly 7 times · {7} — exactly 7 times
Pattern: 11 charsInput: 32 chars
100% client-side · private

✓ Valid Examples

  • 12-3456789
  • 99-9999999
  • 01-0000001

✗ Invalid Examples

  • 123-456789
  • 1-23456789
  • 12-345678