Name: SYNTA-IQ
Author: SYNTA-IQ

Question 1

What is an RFC in Mexico?

Accepted Answer

The RFC (Registro Federal de Contribuyentes) is the Mexican tax identification number issued by the SAT (Servicio de Administración Tributaria). It is required for all legal and commercial activities in Mexico, including filing taxes, issuing invoices (CFDI), opening bank accounts, and signing contracts. Every individual and company operating in Mexico must have one.

Question 2

How many characters is a Mexican RFC?

Accepted Answer

A Mexican RFC has 12 characters for companies (Personas Morales) and 13 characters for individuals (Personas Físicas). Companies use 3 letters derived from the company name, followed by 6 digits for the incorporation date, and 3 alphanumeric characters as the homoclave. Individuals use 4 letters from their surnames and first name, followed by 6 digits for their birth date, and 3 alphanumeric characters.

Question 3

What is the homoclave in an RFC?

Accepted Answer

The homoclave is the final 3-character alphanumeric suffix of an RFC assigned by the SAT (Servicio de Administración Tributaria). It is calculated using an internal SAT algorithm applied to the entity's name (or full name for individuals) to guarantee uniqueness when two entities would otherwise produce identical name and date codes. The homoclave cannot be derived manually.

Question 4

How can I verify a company's RFC in Mexico?

Accepted Answer

To verify that a Mexican company's RFC is active and registered, you can consult the SAT verification portal at sat.gob.mx. The SAT provides a free RFC consultation service. For broader company intelligence — financial data, directors, corporate structure, and compliance risk — search on SYNTA-IQ which aggregates data from official Mexican registries.

RFC Mexico Validator

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