Mexico CFDI for Foreign Companies: RFC Registration & E-Invoicing Obligations

Foreign companies with a permanent establishment (establecimiento permanente) in Mexico must register for an RFC and issue CFDI 4.0 for all Mexican-sourced income. Non-resident companies without a permanent establishment are typically not required to issue CFDIs, but their Mexican clients must withhold and report taxes using specific CFDI types. The registration process requires a legal representative with a Mexican CURP.

When Must Foreign Companies Issue CFDI?

With Permanent Establishment in Mexico

A foreign company has a permanent establishment if it has a fixed place of business, construction project lasting more than 183 days, or dependent agents habitually concluding contracts in Mexico. In this case:

• Must register for RFC with SAT
• Must issue CFDI 4.0 for all Mexican income transactions
• Must appoint a legal representative (representante legal) with Mexican CURP
• Subject to the same penalties as Mexican companies for CFDI non-compliance

Without Permanent Establishment

Foreign companies without a PE in Mexico:

• Are NOT required to issue CFDI
• The Mexican buyer withholds tax and issues a CFDI with Complemento de Comercio Exterior or retención details
• May still need a generic RFC (XEXX010101000 for foreign entities) for the buyer's CFDI

How to Register for RFC as a Foreign Company

Appoint a legal representative: Must have a Mexican CURP and be authorized to act before SAT Gather documentation: Articles of incorporation (apostilled), power of attorney, representative's identification

1. Appoint a legal representative: Must have a Mexican CURP and be authorized to act before SAT
2. Gather documentation: Articles of incorporation (apostilled), power of attorney, representative's identification
3. Schedule SAT appointment: In-person at SAT offices or via the SAT Portal
4. Obtain RFC: SAT issues a 12-character RFC for legal entities
5. Get e.firma (FIEL): Digital certificate for SAT portal access — requires in-person visit
6. Generate CSD: Certificado de Sello Digital for signing CFDIs

Withholding Requirements for Mexican Buyers

Withholding Requirements for Mexican Buyers includes: ISR withholding: Varies by income type — 25% for services, 15-35% for royalties, 4.

When a Mexican company pays a non-resident without PE:

• ISR withholding: Varies by income type — 25% for services, 15-35% for royalties, 4.9-10% for interest
• IVA withholding: 16% for digital services from foreign platforms
• The Mexican buyer issues a CFDI with retención (withholding) details

How Invoicemonk Supports Foreign Companies in Mexico

Invoicemonk provides multi-currency invoicing with automatic MXN conversion, CFDI 4.0 generation for companies with Mexican RFC, and withholding tax calculation support for cross-border transactions.