ISR Tax Refund for Wage Earner Mexico (Solicitud de Devolución de ISR para Asalariados)

An ISR Tax Refund for Wage Earner Mexico (Solicitud de Devolución de ISR para Asalariados) is the formal application filed with the Servicio de Administración Tributaria (SAT) by a salaried worker (trabajador asalariado) or their employer on their behalf, requesting reimbursement of Impuesto sobre la Renta (ISR — income tax) that was over-withheld from the worker's wages during the fiscal year. The refund mechanism is governed by Article 22 of the Código Fiscal de la Federación (CFF), published in the DOF on 31 December 1981 and continuously reformed, and Article 97 of the Ley del Impuesto sobre la Renta (LISR), published in the DOF on 11 December 2013.

Under Article 94 of the LISR, employers (patrones) acting as withholding agents (agentes de retención) are legally required to withhold ISR from their employees' wages each payroll period using the monthly tax tables (tarifas mensuales) published by the SAT, adjusted for any deductions (deducciones personales) declared by the worker at the beginning of the year. Article 96 LISR requires employers to calculate and apply the annual ISR adjustment (ajuste anual del ISR) in December of each year or upon termination — comparing the total ISR withheld during the year against the worker's actual annual tax liability using the annual tax rate table (tarifa anual del ISR). Where the employer's calculation shows that total withholdings exceed the actual annual liability, the employer must return the excess to the worker through the December payroll under Article 97 LISR.

However, circumstances arise where the worker must file directly with the SAT for a refund rather than receiving the adjustment from the employer. Article 97 LISR specifies that workers must file their own annual ISR declaration (declaración anual de personas físicas — ingresos por salarios y en general por la prestación de un servicio personal subordinado) with the SAT when: they received income from two or more employers simultaneously during the year (ingresos de dos o más patrones simultáneamente); they received non-wage income in addition to salary (ingresos además del salario — dividends, leasing income, professional fees); they received income from an employer not obligated to make withholdings under LISR; they ceased employment before the annual adjustment was completed; or the worker chooses to file a voluntary annual declaration to apply deductions (deducciones personales autorizadas) not previously declared to the employer.

Authorized personal deductions (deducciones personales) under Article 151 LISR that frequently generate ISR refund entitlements for wage earners include: medical and dental fees (honorarios médicos y dentales); hospital expenses and prescription medications; funeral expenses for close relatives; required charitable donations (donativos a instituciones autorizadas por el SAT); mortgage interest (intereses reales de créditos hipotecarios); complementary retirement savings (aportaciones complementarias a AFORE o planes personales de retiro); transportation for disability; and education tuition fees from primary through university level (colegiaturas hasta el límite establecido en el Decreto Presidencial). These deductions — which must be documented with valid CFDIs (Comprobantes Fiscales Digitales por Internet) — reduce the worker's taxable base and frequently generate a refund when applied in the annual declaration.

The SAT processes ISR refund requests for wage earners through the Declaración Anual de Personas Físicas portal at sat.gob.mx — the system is pre-populated with information from CFDIs issued to the taxpayer, IMSS contribution records, and INFONAVIT mortgage interest data, significantly simplifying the annual declaration process. The SAT's automatic pre-populated declaration system (Declaración Anual Pre-llenada) has substantially reduced errors and reduced average processing times for wage earner refunds.

An ISR Tax Refund Request for Wage Earners Mexico under CFF Article 22 and LISR Article 97 is needed in several defined circumstances where the ISR withheld from a worker's wages during the fiscal year exceeds their actual annual income tax liability.

The refund application is required — and the worker is legally obligated to file an annual declaration — when the worker received wages from two or more employers simultaneously during the same fiscal year (ingresos simultáneos de dos patrones). When two employers each apply the full monthly ISR tables to the worker's respective salary without coordination, total withholdings commonly exceed the worker's actual annual liability under the progressive rate table (tarifa anual). The worker must file an annual declaration (declaración anual) to reconcile the total income, apply the correct annual rate, and claim a refund for the excess.

The solicitud de devolución is needed when a worker exercised their right to apply personal deductions (deducciones personales autorizadas under Article 151 LISR) in their annual declaration that were not previously reported to the employer for the monthly withholding calculation. Deductions for medical expenses, mortgage interest, school tuition, and complementary retirement savings are particularly common sources of year-end refunds — workers who make significant deductible expenditures during the year should plan to file their annual declaration to recover the ISR over-withheld from their paycheck.

The refund request is necessary when a worker was terminated during the year and the employer failed to perform the annual ISR adjustment (cálculo del ajuste anual) before issuing the final finiquito, as required by Article 97 LISR. In this case, the worker must file their own annual declaration by April 30 of the following year (for wage-only income) to claim the refund corresponding to the unused annual deduction (límite inferior de la tarifa anual) that accrued during the months the worker was not employed.

For workers who also received employment subsidies (subsidio para el empleo) during the year — a monthly payment made by employers to low-income workers and credited against their ISR obligation under the Decreto del Subsidio para el Empleo — the annual reconciliation frequently shows a credit balance in favor of the worker. The subsidio para el empleo system interacts with ISR withholding in ways that require careful annual calculation, and many workers at or near the minimum wage receive ISR refunds each year as a result.

The application is also needed by workers who received year-end bonuses (bonos de fin de año), PTU profit-sharing distributions, or other non-recurring income items that were withheld at higher rates in the month of payment but, when spread over the full annual taxable base, generate a lower overall effective rate entitling the worker to a refund. Under Article 96 LISR, employers apply a simplified withholding calculation for one-time payments using the factor of monthly income — but the actual annualized rate may be lower, particularly for workers who received PTU tax-exempt amounts under Article 93 Section XIV LISR.

Article 22 CFF establishes that the SAT must resolve refund requests within forty working days of receiving the complete application — failure to resolve within this period generates an automatic refusal (negativa ficta) that can be challenged before the Tribunal Federal de Justicia Administrativa (TFJA) or through an amparo proceeding. The SAT may request additional documentation (requerimiento de información) within the forty-day period, which suspends the timeline until the worker responds. La Suprema Corte de Justicia de la Nación y los Tribunales Colegiados de Circuito han emitido tesis jurisprudenciales sobre la interpretación de este tipo de documento. El Registro Público de la Propiedad y de Comercio inscribe actos que afectan derechos reales. La Procuraduría Federal del Consumidor (PROFECO) y la Comisión Nacional Bancaria y de Valores (CNBV) supervisan aspectos complementarios.

A valid ISR Tax Refund Request for Wage Earners Mexico under CFF art. 22 and LISR art. 97 requires the following elements for the SAT to accept and process the refund application.

Taxpayer Identification: The worker's RFC (Registro Federal de Contribuyentes) — a mandatory identifier for all SAT transactions. Workers who do not yet have an RFC must register with the SAT through the portal sat.gob.mx (using the CURP as the basis) before filing the refund request. The RFC for natural persons consists of thirteen characters: ten derived from the name and birth date (same structure as the first ten CURP characters) plus a three-character homoclave assigned by the SAT. The worker's CURP, full legal name, and tax domicile (domicilio fiscal) registered in the SAT's Padrón de Contribuyentes must match the information in the annual declaration.

Annual Declaration (Declaración Anual de Personas Físicas): A completed and submitted annual ISR declaration for the fiscal year in question, filed through the SAT portal at sat.gob.mx. The annual declaration must reflect total wages received from all employers during the year (ingresos acumulables por salarios), total ISR withheld by all employers (retenciones de ISR), and all authorized personal deductions (deducciones personales) supported by valid CFDIs. The SAT's pre-populated declaration system (Declaración Pre-llenada) automatically loads CFDI data from the worker's tax inbox (buzón tributario) — workers should verify the pre-loaded data for accuracy and add any missing items before submitting.

Constancias de Percepciones y Retenciones (Employer Withholding Statements): For each employer from whom wages were received during the fiscal year, the worker must provide the annual Constancia de Percepciones y Retenciones (Form 37 equivalent) issued by the employer under Article 99 Fraction III LISR. This document details total wages paid, total ISR withheld, and total subsidio para el empleo credited during the year. Employers are required to issue this constancia no later than 15 February of the following year — workers who have not received it by that date should contact the employer's HR department.

CFDI Nómina Records: Copies (digital records from the SAT buzón tributario) of the CFDIs de nómina issued by each employer during the year — each payroll receipt (recibo de nómina) is a CFDI stamped by the SAT through an authorized PAC (Proveedor Autorizado de Certificación). The SAT system automatically links CFDI nómina records to the worker's RFC, so workers who use the SAT's Declaración Pre-llenada system will find their wage income already populated from these records.

Personal Deduction CFDIs: Original CFDIs (Comprobantes Fiscales Digitales por Internet) supporting each personal deduction claimed under Article 151 LISR — medical and dental invoices (facturas médicas) issued by licensed professionals with cédula profesional, hospital receipts, mortgage interest certificate from the lending institution (constancia de intereses reales pagados), educational tuition invoices (facturas de colegiaturas), funeral service invoices, and donation receipts from SAT-authorized donatarias autorizadas. All deduction-supporting CFDIs must be issued in the worker's RFC — CFDIs issued to other family members are only deductible under specific rules for certain medical expense categories.

Bank Account for Refund Deposit (CLABE Interbancaria): The worker's eighteen-digit CLABE (Clave Bancaria Estandarizada) for the bank account designated to receive the refund. The SAT will only deposit refunds to a bank account registered in the worker's name at the RFC used for the refund request — refunds cannot be directed to third-party accounts. Workers must register their CLABE in the SAT portal before or during the refund application process through the Datos de Contacto section of Servicios del Portal SAT.

Forms-legal.com provides this ISR Tax Refund for Wage Earners Mexico template as a practical preparation guide for workers navigating the annual SAT declaration and refund process. The SAT's Declaración Anual service for wage earners is available from 1 April through 30 April each year for income received in the previous fiscal year — filing before the April 30 deadline is important to avoid late filing penalties. Workers are encouraged to consult a Contador Público or fiscalista for guidance on maximizing authorized deductions and ensuring the declaration is filed correctly, particularly when multiple employers, multiple income sources, or complex deduction situations are involved.