CFDi 4.0

2021-12-17: Released FirmaSAT version 10.40 with support for CFDi versión 4.0, Complemento Pagos v2.0, and CFDI Retenciones v2.0.

Link to SAT page

Here is the official SAT page for CFDi 4.0:

Formato de factura (Anexo 20)

CFD v4.0 Examples - some example XML documents.

Complemento Carta Porte v2.0 was first published by SAT on 26 October 2021. It is compulsory from 1 January 2022.

Official SAT page for Complemento Carta Porte

http://omawww.sat.gob.mx/tramitesyservicios/Paginas/complemento_carta_porte.htm

Our summary of the complementos and complementos concepto used in CFDi v4.0 documents.

Complementos and Complementos Concepto

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This page last updated 10 September 2025