Tax compliance · Mexico 2026
When CFDI 4.0 became mandatory in Mexico in April 2023, the change stopped being a back-office concern and became an operational one — for any team that buys corporate merch, runs an annual uniform programme, ships welcome kits to new hires, or delivers year-end gifts to clients. The new format pulls in Carta Porte 3.0, the tax-regime field, SAT product/service keys, and 16 % IVA (or 8 % in the border zone). At Corp-Merch.MX we run this workflow every day for clients across FEMSA, Grupo Salinas, Coppel, Arca Continental, Grupo Bimbo, Liverpool, Elektra, Banorte and hundreds of IMMEX plants — here is the working playbook.
CFDI 4.0 introduces three changes that touch a merch programme directly. The first is the mandatory tax-regime field on the receptor side of the invoice. The old CFDI 3.3 form let providers leave that field vague or default to a generic RFC entry. Under 4.0, SAT requires the precise regime code registered in the buyer's Constancia de Situación Fiscal: 601 for Régimen General de Ley, 612 for individuals under Actividad Empresarial y Profesional, 626 for RESICO, and a dedicated IMMEX path for maquiladora operations. If your ERP or accounting tool doesn't surface that field, the PAC will refuse the stamp and the invoice never reaches you.
The second change is the SAT product/service keys, catalogued under c_ClaveProdServ. Merch programmes typically rely on 60101501 for uniform t-shirts, 60101606 for backpacks and briefcases, 50202201 for thermos bottles and drinkware, 60121603 for ceramic mugs, 44111506 for notebooks and agendas, 44121706 for pens, and 80141605 for full merch kits. The right key depends on the item and how your tax team classifies it — agreeing that upfront avoids repapering later.
The third is Carta Porte 3.0, mandatory since 1 January 2024 for any federal transport by road, rail or air. Locally, Carta Porte applies when the shipment exceeds 1.5 tonnes or the merchandise value exceeds $50,000 MXN. Inter-state, it almost always applies. We stamp the Carta Porte alongside the merch CFDI using our own fleet data, so your finance team receives a single linked document for each delivery.
Phase one is fiscal onboarding. We need the buyer's RFC, legal name, tax regime, fiscal zip code (the one on the Constancia, not the delivery zip), the contact email that should receive invoices, and an up-to-date Constancia de Situación Fiscal. Without these we cannot stamp.
Phase two is the commercial addendum. We document currency (MXN, or USD with the Banco de México fix of the previous day), payment terms (PUE for spot payments, PPD for credit), payment method (wire transfer, nominative cheque, TIIE-linked), use of CFDI (G03 for general expenses, G01 for procurement, I02 for inventory, P01 to be defined), and invoicing cadence (one invoice per delivery, monthly consolidated, or split by cost centre).
Phase three is a stamp dry-run. We issue a test CFDI with the buyer's data and validate it on the SAT portal before the first real delivery. That one dry-run usually saves weeks of churn later.
Phase four is recurring operation. Each delivery triggers a CFDI with Carta Porte when applicable, delivered within 48 business hours. For monthly programmes (typical in IMMEX maquiladoras or retail chains rolling out uniforms) we issue a consolidated invoice per cost centre with line-by-line breakdown.
Phase five is reconciliation. We deliver XML and PDF for every CFDI plus a monthly report listing folios, dates, amounts, IVA breakdown and PO reference. For buyers operating in the border zone we apply the reduced 8 % rate on deliveries into the 22-kilometre belt or the SAT-specified municipalities.
IMMEX maquiladoras have three particularities. First, when the merch is delivered physically on-shore to the plant but the underlying service is for a foreign principal, we stamp with the foreign-trade complement. Second, when the merch itself crosses the border — for example custom polos produced in Mexicali and worn by plant staff in Calexico — we add the customs complement to the CFDI. Third, in cases where the merch re-exports with the finished good under a temporary import, we coordinate with your customs broker to keep the pedimento aligned.
For donations, partners include DIF Nacional, DIF CDMX, Cruz Roja Mexicana, Save the Children México, Unicef México, World Vision México, Oxfam México, Fundación Carlos Slim, Fundación FEMSA, Fundación Banorte, Endeavor México, Ashoka México and United Way México. These invoices go out under use-of-CFDI D01 and require the receptor's current SAT donation authorisation number.
For border-zone operations (Tijuana, Mexicali, Ciudad Juárez, Nuevo Laredo, Reynosa, Matamoros), we apply the 8 % reduced rate when the delivery zip is in the SAT-specified list. Free-zone operations (parts of Baja California, Sonora and Chihuahua) follow the Decreto de zona libre — talk to your tax advisor on whether your specific case qualifies.
Programmes that face external audits — pharma, medical devices, automotive Tier 1, electronics — typically require fiscal traceability per production lot. We link the CFDI to the purchase order, the production lot number, and the destination of each carton (via the Carta Porte). This closes the loop for SAT, for the IMMEX quarterly report, and for your own contraloría reviews.
National rollouts for chains (Oxxo, 7-Eleven México, Farmacias Guadalajara, Farmacias del Ahorro, Soriana, Chedraui, Walmart México, Bodega Aurrera, Sam's Club México, Costco México) consolidate into one invoice per cost centre, with line-by-line breakdown by destination store. Each carton is identified with an internal transfer-order reference so the receiving team can match physical receipt to the fiscal document.
CFDI 4.0 makes the receptor's tax regime, fiscal zip code, and SAT product/service keys mandatory. CFDI 3.3 allowed those as optional, which created widespread under-specification. 4.0 also adds Carta Porte 3.0 when transport is involved.
Always on inter-state freight. Locally, Carta Porte applies when the shipment exceeds 1.5 tonnes or $50,000 MXN. Most in-city merch deliveries inside CDMX, Guadalajara or Monterrey stay under both thresholds.
Under receptor regime 601, with 16 % IVA broken out, and Carta Porte on inter-state freight. For cross-border delivery we add the foreign-trade complement. XML and PDF are delivered together.
Yes — regime 626, standard 16 % IVA, with the buyer applying the corresponding acreditamiento.
Within 48 business hours of the physical delivery. For buyers needing an anticipo invoice to release payment, we stamp PPD and complement with the payment receipt at close.
If you're closing your first merch order of the year or switching providers and want CFDI 4.0 compliance from the first invoice — let's talk. Send us the legal name, RFC, tax regime, fiscal zip, use-of-CFDI, payment terms, invoicing cadence, and Carta Porte or foreign-trade data when applicable.
Corp-Merch.MX is a corporate merch and gifting workshop based in Mexico City. We operate independently and are not a partner, official distributor or representative of SAT, nor of the brands and companies referenced on this page. Mentions of FEMSA, Grupo Salinas, Coppel, Arca Continental, Grupo Bimbo, Liverpool, Elektra, Banorte, Oxxo, 7-Eleven, Walmart, Costco, GM, Stellantis, Bosch and similar entities are made solely for descriptive purposes to identify the operating context of the merch sector in Mexico. The tax information in this guide is operational and does not constitute tax advice — consult your accountant or tax counsel for your specific case.