Debit Note Mexico (Nota de Débito)

A Debit Note Mexico (Nota de Débito) is a fiscal document issued by a seller (proveedor or acreedor) to a buyer (cliente or deudor) increasing the amount owed beyond what was originally invoiced, governed by the Código Fiscal de la Federación (CFF) Article 29 and the SAT's CFDI technical standards established in Anexo 20 of the Resolución Miscelánea Fiscal. Under Mexico's electronic invoicing system, a nota de débito is issued as a CFDI of type 'I' (CFDI de Ingreso) — a new invoice — that references the original CFDI de Ingreso through the related document field, with relationship type '06' (Factura generada por los traslados previos). Unlike a nota de crédito which reduces obligations, the nota de débito increases the buyer's payable amount and the seller's tax liabilities for IVA and ISR.

CFF Article 29 establishes the fundamental obligation to issue CFDIs for all transfers of goods, services, or considerations in Mexico. When a commercial transaction results in charges beyond the original invoice — such as late payment penalties (penalizaciones por mora), additional services rendered (servicios adicionales no contemplados en la factura original), price escalation clauses (cláusulas de actualización de precios por inflación), freight and logistics charges not included in the original price, or correction of undercharged amounts — the seller must issue an additional CFDI to properly document and declare these incremental charges. Failing to issue a CFDI for additional charges constitutes a CFF Article 29 violation and may result in SAT sanctions under CFF Article 82.

The nota de débito plays a critical role in the commercial relationship between suppliers and buyers in Mexico. In supply chain management, logistics charges (gastos de flete, seguro, and manejo) are frequently invoiced separately from the goods. The nota de débito documents these logistics charges referencing the original goods invoice, enabling the buyer to account for the full landed cost of the goods and to apply the IVA on these additional charges as acreditable input IVA. Similarly, in construction and engineering projects (contratos de obra), cost overruns (sobre-costos) approved by the project owner are documented through notas de débito from the contractor — these incremental charges flow through the project's cost accounting and are subject to IVA at 16% under the Ley del Impuesto al Valor Agregado Article 14.

Penalty charges (penas convencionales and cláusulas penales) agreed in commercial contracts under CCF Articles 1840 through 1843 and Código de Comercio Articles 77 through 88 must be invoiced through CFDIs. When a buyer defaults on payment and the contract provides for a conventional penalty (pena convencional), the seller issues a nota de débito as a CFDI de Ingreso for the penalty amount. The IVA treatment of conventional penalties has been clarified by the TFJA (Tribunal Federal de Justicia Administrativa) — penalties that are genuine contractual penalties (not disguised additional consideration) may be exempt from IVA under certain interpretations, while penalties that represent additional compensation for services or goods are fully taxable at 16%.

For international transactions under Mexico's free trade agreements (USMCA — T-MEC, and others), price adjustments and additional charges must be documented through proper CFDIs to maintain compliance with customs valuation rules under the Ley Aduanera and SAT's customs administration. Under the T-MEC rules of origin, the customs value declared for imported goods must include all charges and must be supported by CFDI documentation.

A Debit Note Mexico (Nota de Débito) is required whenever a seller needs to charge an additional amount to a buyer beyond what was covered in the original CFDI de Ingreso, or when the original invoice undercharged the buyer due to error, omission, or subsequent contractual obligation.

The nota de débito is needed when additional services are rendered after the original invoice was issued. In professional services agreements (contratos de prestación de servicios), scope expansion (ampliación de alcance) results in additional honorarios or fees that were not included in the original CFDI — the professional or service provider issues a nota de débito CFDI for the additional amount, referencing the original engagement invoice.

Price escalation clauses (cláusulas de escalación de precios) in long-term supply contracts tied to the INPC (Índice Nacional de Precios al Consumidor published by INEGI) or to commodity prices create periodic adjustment obligations. When the price index trigger is met, the seller issues a nota de débito for the incremental price increase applied to the period's deliveries — this keeps the original contract invoice intact while documenting the adjustment separately.

Late payment surcharges (recargos por pago extemporáneo or intereses moratorios) agreed between commercial parties under CCF Article 2395 or Código de Comercio Article 362 must be invoiced through a nota de débito when they accrue. Financial institutions (bancos and SOFOM entities) issue notas de débito for default interest charges on overdue commercial credit facilities.

Freight, insurance, and handling charges (fletes, seguros y maniobras — collectively 'FIM') are frequently excluded from goods invoices under commercial terms such as ex-works (EXW) and subsequently charged through a nota de débito once the actual shipping costs are known. The nota de débito ensures these charges are properly invoiced and the IVA on transportation services is documented for the buyer's input IVA credit.

Corrections for undercharged amounts on original invoices require a nota de débito. When a billing error results in an amount lower than what the parties agreed — due to data entry errors, wrong unit prices, or missing quantity items — the nota de débito corrects the record without requiring cancellation of the original CFDI, which may not be feasible after the SAT's 72-hour cancellation window under CFF Article 29-A.

A valid Debit Note Mexico (Nota de Débito) issued under CFF Article 29 and the SAT's CFDI Anexo 20 must include the following elements:

CFDI Type 'I' (CFDI de Ingreso): The nota de débito is technically a new CFDI de Ingreso (type 'I') — an additional invoice — not a separate document type in the SAT's CFDI catalog. It is identified as a nota de débito by its commercial purpose and by the related document reference to the original CFDI.

Reference to Original CFDI (Relación con Documento Original): The UUID (Folio Fiscal) of the original invoice being supplemented or corrected must appear in the CFDI's CfdiRelacionados field with the appropriate relationship type. For additional charges related to a prior invoice, relationship type '06' (Factura generada por los traslados previos) or '07' (CFDI por aplicación de anticipos) is used, depending on the commercial context. This electronic link connects the nota de débito to the original transaction in the SAT's CFDI database.

Issuer and Receptor Data (Datos del Emisor y Receptor): The seller's RFC, fiscal regime, registered address, and the buyer's RFC, corporate name, fiscal address, and CFDI use code. These must match the original invoice's parties — a nota de débito cannot be issued by a different entity than the original invoice issuer.

Detailed Concept Description (Descripción del Concepto): A specific description of the additional charge, including: the nature of the additional service or adjustment (e.g., 'Recargo por pago extemporáneo correspondiente a la factura UUID [xxx], período [dates], tasa mensual del 1.5%'), the unit of measurement, quantity, unit price, and total amount. The SAT's ClaveProdServ (product/service classification key) must match the type of charge being invoiced.

IVA on Additional Charges (IVA sobre el Débito): The IVA amount at 16% on the additional charge amount, if the underlying service or goods are subject to IVA. The IVA on the nota de débito is added to the seller's monthly IVA payable and creates an additional IVA credit (IVA acreditable) for the buyer. For charges that may be IVA-exempt (such as certain penalty charges or financial interest under LIVA Article 15), the exemption must be stated explicitly.

ISR on Additional Income (ISR sobre Ingresos Adicionales): The additional income from the nota de débito increases the seller's ISR base for provisional payment purposes. If the original sale was made by a persona moral, the additional income is added to the monthly accumulated income for ISR provisional payment calculation under LISR Article 14.

Payment Terms on the Nota de Débito (Condiciones de Pago): Whether the additional amount is payable immediately (PUE — pago en una sola exhibición) or deferred (PPD — pago en parcialidades o diferido). For immediate payment notas de débito, the complemento de recepción de pagos is not required. For deferred payment, the complemento de pago 2.0 must be issued when payment is actually received.

Digital Certification (Sello y Certificación PAC): The nota de débito CFDI must be certified by a SAT-authorized PAC with a valid digital seal before being sent to the buyer. Forms-legal.com provides this Debit Note Mexico template as a reference for understanding nota de débito requirements. All formal notas de débito must be issued as CFDIs through a SAT-authorized PAC to produce fiscal effects.