Mexico RFC Validator
Validate Mexican Tax ID
Enter a Mexican Federal Taxpayer Registry number to verify its validity.
About this Validator
This tool validates Mexican Federal Taxpayer Registry codes according to SAT requirements.
The validator checks if a given RFC follows the correct structure for either individuals or legal entities.
This validation only confirms if an RFC follows the correct format. It does not verify if the number is actually registered with Mexican tax authorities (SAT).
What is an RFC (Registro Federal de Contribuyentes)?
RFC Structure: Individuals (13 characters): • First 4: Name-based - 2 from paternal surname - 1 from maternal surname - 1 from first name • Next 6: Birth date (YYMMDD) • Last 3: Homoclave Legal Entities (12 characters): • First 3: Company initials • Next 6: Formation date (YYMMDD) • Last 3: Homoclave
Special Rules: • Vowel handling for surnames • María/José name exception • X for missing surname • Inappropriate word prevention • SAT-assigned homoclave
Used for: • Tax declarations • Business registration • Economic activities • Legal documents • Financial transactions • Government services
Important Notes: • Mandatory for taxpayers • Internet registration • SAT verification • Official standard • Identity verification
If you need to generate an RFC for testing purposes, here is a Mexico RFC Generator