Skip to content

RFC guides

A company’s RFC: what it is used for

A company uses its own taxpayer key. It is not formed from the legal representative’s date of birth.

A 12-character key

A company RFC uses three characters related to its legal name, six for its incorporation date and three final characters. SAT assigns the definitive key.

Invoices and official procedures

The RFC identifies the company for tax purposes in invoices and procedures. A correctly formatted key does not mean that all its tax obligations have been fulfilled.

Verify registration

Use the SAT service when you need to confirm registration. Issuing a CFDI also requires the correct tax details for the recipient.

Calculation method and checked examples