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Mexico TIN validator
Check whether a Mexico RFC follows the expected structure before you save it, send it to an API, or include it in a tax workflow.
Private by design
Your data stays in your browser
None of the TIN data you enter is ever saved to our servers — validation runs entirely on your device.
Validation Workspace
Validate RFC
Enterprise checks for Mexico tax identification numbers.
Instant one-by-one format validation
How Mexico tax IDs are formatted
In Mexico, the tax identifier is commonly known as Registro Federal de Contribuyentes (RFC). The expected format is 13 characters for individuals (AAAA######XXX), 12 for legal entities. Teams usually need a Mexico RFC check around tax declarations, invoicing, employment, or before a record moves into billing, onboarding, or compliance review.
Valid examples
ABCD560101ABCABC5601011A3
Invalid examples
- ABCD560101 (Incomplete)
- ABCD5601011AA (Wrong format)
What this validator checks
Format and length
Confirms the number follows the expected Mexico pattern: 13 characters for individuals (AAAA######XXX), 12 for legal entities.
Useful examples
Shows valid and invalid-looking samples so you can compare spacing, separators, letters, and digit counts before submitting real data.
When people usually check this number
- Tax declarations
- Invoicing
- Employment
- Banking
A format match does not prove that a Mexico tax ID belongs to a specific person or business. Use the result as a first-pass data quality check, then confirm sensitive cases with official records.
Official source: Servicio de Administración Tributaria
Last reviewed: May 23, 2026. We update country guidance when public format rules change.
How to check a Mexico RFC
Use this check before a record reaches billing, tax reporting, or manual review.
Enter the RFC
Paste or type the Mexico tax identifier exactly as it appears in your source record. Spaces and separators are fine when they are part of the expected format.
Review the format result
Check whether the number matches the known Mexico structure, including length, separators, letters, and checksum rules where public guidance includes them.
Confirm important records
For onboarding, tax reporting, or compliance work, treat the result as a data-quality signal and confirm high-risk records with Servicio de Administración Tributaria or your internal process.
Frequently asked questions
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