Disclaimer and calculator limitations

A calculator result is not an official document, a registration or a tax certification.

Official assignment

Only SAT assigns and confirms a registered taxpayer key. A mathematical calculation does not query existing name collisions in the registry, so its result may differ from your official RFC.

Using the information

Before using a key for an invoice or an official procedure, confirm it with the authority. Guides provide general information and do not replace advice about a particular situation. Official procedures may change.

Project operator

CalcularRFC is maintained by Martin Kreitl. The published contact address is calcularrfc@gmail.com. The project is not affiliated with the institutions it links to.