Essential Features for Mexican E-Invoicing Compliance
For businesses operating in Mexico, an invoicing app must prioritize strict adherence to the country's e-invoicing regulations, primarily the Comprobante Fiscal Digital por Internet (CFDI) system. All invoices must be issued in the CFDI 4.0 XML format, which has been mandatory since April 1, 2023. A critical feature is robust digital signature management, requiring the use of an e.firma (FIEL) and a Certificado de Sello Digital (CSD) issued by the Servicio de Administración Tributaria (SAT) to digitally sign and authenticate invoices. The app must integrate with an Authorized Certification Provider (PAC) for real-time validation and "timbrado" (stamping) of CFDIs, as direct submission to the SAT is not allowed. Furthermore, automated tax calculations specific to Mexican laws are essential, accurately applying the standard 16% IVA (Value Added Tax) or the 8% border zone rate, and managing various "complementos" for specific transaction types like payroll, payments, or transport.