Mexico RFC Registration: Complete Guide for Individuals and Businesses

The RFC (Registro Federal de Contribuyentes) is Mexico's federal taxpayer identification system administered by the SAT (Servicio de Administración Tributaria). The RFC is a 12 or 13-character alphanumeric code that uniquely identifies individuals and businesses for tax purposes in Mexico.

Having an RFC is mandatory for anyone conducting economic activities in Mexico, including business owners, freelancers, employees receiving certain benefits, and individuals making specific financial transactions. The RFC is required for issuing invoices (facturas), opening bank accounts, buying or selling real estate, and conducting any formal business in Mexico.

Types of RFC Registration

Individuals (Persona Física)

The RFC for individuals is 13 characters long and follows this structure:

| Position | Content | Example |

|---|---|---|

| 1-4 | Surname initials + first name initial | CAST |

| 5-10 | Date of birth (YYMMDD) | 850315 |

| 11-12 | Homoclave (assigned by SAT) | AB |

| 13 | Verification digit | 5 |

Example RFC for an individual: CAAA850315AB5

Businesses (Persona Moral)

The RFC for businesses is 12 characters long:

| Position | Content | Example |

|---|---|---|

| 1-3 | Company name abbreviation | GAC |

| 4-6 | Date of incorporation (YYMMDD) | 850101 |

| 7-8 | Homoclave | MG |

| 9-12 | Verification digits | 123 |

Example RFC for a company: GAC850101MG12

Registration Process

Online registration through the SAT website is the fastest method:

1. Visit sat.gob.mx and access the "Inscripción al RFC" section

2. Have your CURP (for individuals) or incorporation documents (for businesses) ready

3. Fill in the online registration form

4. Print the RFC registration confirmation (constancia de situación fiscal)

5. The RFC is issued immediately upon completion

Obligations of RFC Holders

Registered taxpayers must comply with:

| Obligation | Frequency | Notes |

|---|---|---|

| Tax Returns (Declaración Anual) | Annual | Due in April of the following year |

| Monthly Provisional Payments | Monthly | Based on estimated income |

| Accounting Records | Ongoing | Must be kept for 5 years |

| Invoices (CFDI) | As needed | Required for deductions |

Obtaining RFC Constancia

The Constancia de Situación Fiscal is a key document that proves your RFC status. You can download it anytime through the SAT portal using your RFC and password (CIEC or FIEL). Keep your RFC constancia updated with any changes to your address or business activities.