RFC Calculator
Calculate the full 13-character RFC for a Mexican physical person using names, surnames, and date of birth.
Personal data
Enter the data normally requested to form the RFC characters for a physical person, including homoclave calculation.
If the first name is José or María and another name exists, the calculator uses the following name.
Optional. If omitted, the third RFC letter is usually represented with X.
Result
The official RFC has 13 characters. The last three characters are the SAT homoclave and verification digit.
Generated full RFC
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This calculator generates the RFC base, homoclave, and verification digit algorithmically. For official tax use, confirm the RFC against SAT records or official documents.
| Name used | — |
|---|---|
| Letters | — |
| Birth date | — |
| RFC base | — |
| Homoclave | — |
| Verification digit | — |
| Rule notes | — |
The RFC structure for physical persons starts with four letters from the name and surnames, followed by the birth date in YYMMDD format, two homoclave characters, and one verification digit. For real tax use, always verify the full RFC with the person’s official SAT records.