Key Takeaways

  • IMSS, INFONAVIT, and SAR contributions are calculated on the Salario Diario Integrado (SDI), which includes base salary plus proportional values of Aguinaldo, vacation premium, and other regular benefits — not just base salary.
  • Income tax (ISR) ranges from 1.92% to 35%, and every salary payment requires a CFDI digital payroll receipt issued via an SAT-authorised PAC; failure to issue CFDIs can result in payroll being disallowed as a deductible expense.
  • Employers must pay a mandatory Aguinaldo (Christmas bonus) of at least 15 days’ salary by December 20, and distribute profit sharing (PTU) of 10% of taxable income to eligible employees by May 31.
  • The minimum wage is MXN 278.80 per day (general zone, 2025), with a higher rate of MXN 419.88 per day in the Northern Border Free Zone — the correct zone rate must be applied to all relevant employees.
  • Outsourcing payroll to a Mexico-specialist provider is the most reliable way to manage IMSS, INFONAVIT, SAR, ISR, CFDI, PTU, and Aguinaldo obligations simultaneously within the Federal Labour Law framework.

Mexico is the second-largest economy in Latin America and a founding member of the United States-Mexico-Canada Agreement (USMCA). With a population exceeding 130 million and a GDP driven by manufacturing, automotive, technology, and services exports, Mexico attracts substantial foreign direct investment from North America, Europe, and Asia. The country’s proximity to the United States and its extensive free trade network make it a strategic base for nearshoring operations. However, employing staff in Mexico involves navigating one of Latin America’s most complex payroll frameworks — encompassing income tax (ISR), social security (IMSS), housing fund contributions (INFONAVIT), retirement savings (AFORE/SAR), a mandatory year-end Christmas bonus (Aguinaldo), and the annual profit-sharing obligation (PTU).

Mexico payroll outsourcing provides international employers with a reliable path to compliance without the burden of establishing a dedicated local payroll function. By partnering with a provider experienced in the Servicio de Administración Tributaria (SAT), the Instituto Mexicano del Seguro Social (IMSS), and the Ley Federal del Trabajo (Federal Labour Law), businesses can manage their Mexican workforce compliantly from day one. This guide explains the Mexican payroll framework in full and helps you assess whether outsourcing is the right approach for your organisation.

What is Payroll Outsourcing in Mexico?

Payroll outsourcing in Mexico means delegating responsibility for salary calculation, ISR income tax withholding, IMSS social security contributions, INFONAVIT housing fund payments, SAR retirement savings contributions, Aguinaldo (Christmas bonus) calculations, PTU (profit sharing) obligations, CFDI digital payroll receipt generation, and regulatory filings to a qualified third-party provider. This covers compliance with the SAT, IMSS, and INFONAVIT.

For companies without a legal entity in Mexico, payroll outsourcing is often combined with an employer of record in Mexico, which acts as the legal employer while you retain operational control. This model is particularly common among technology companies, automotive suppliers, and manufacturers using Mexico as a nearshoring base.

A specialist provider manages SAT registration, IMSS employer registration, INFONAVIT registration, and all monthly and bimonthly obligations, ensuring accurate calculations and timely digital submissions via the SAT’s CFDI electronic invoicing system.

Mexico Payroll Regulatory Framework

Mexico’s payroll environment is one of the most multi-layered in Latin America, governed by the Servicio de Administración Tributaria (SAT) for income tax, the Instituto Mexicano del Seguro Social (IMSS) for social security, the Instituto del Fondo Nacional de la Vivienda para los Trabajadores (INFONAVIT) for housing fund contributions, and the Comisión Nacional del Sistema de Ahorro para el Retiro (CONSAR) for retirement savings. All are underpinned by the Ley Federal del Trabajo (LFT — Federal Labour Law) for employment standards.

Governing Bodies

The Servicio de Administración Tributaria (SAT) administers income tax (ISR) collection, employer RFC registration, CFDI payroll receipt requirements, and annual tax filings. The Instituto Mexicano del Seguro Social (IMSS) collects social security contributions covering healthcare, maternity, disability, retirement, and occupational risk. INFONAVIT manages the mandatory housing fund, to which employers contribute 5% of each employee’s Salario Diario Integrado (SDI). The Comisión Nacional del Sistema de Ahorro para el Retiro (CONSAR) oversees AFORE retirement savings accounts. The Secretaría del Trabajo y Previsión Social (STPS) enforces employment standards under the Federal Labour Law.

The World Bank’s Mexico country overview provides useful context on the country’s economic development priorities, including labour market reforms and investment in digital government systems affecting employer compliance.

IMSS, INFONAVIT, and SAR Contributions

Mexico’s employer social contributions are calculated on the employee’s Salario Diario Integrado (SDI — integrated daily salary), which includes base salary plus proportional values of Aguinaldo, vacation premium, and other regular benefits. The combined employer IMSS contribution rate is approximately 17–35% of SDI, depending on the employer’s occupational risk classification (Prima de Riesgo de Trabajo). Employee contributions to IMSS are approximately 2% of SDI. INFONAVIT contributions are 5% of the employee’s SDI and are entirely employer-paid. SAR (Sistema de Ahorro para el Retiro) retirement savings contributions are 2% of SDI for the employer.

All three contributions — IMSS, INFONAVIT, and SAR — are filed and remitted bimonthly via the SUA (Sistema Único de Autoliquidación) system, with payments due by the 17th of the month following each bimonthly period.

Income Tax (ISR)

Mexico applies a progressive income tax (ISR — Impuesto Sobre la Renta) with rates ranging from 1.92% to 35%. Employers must calculate and withhold ISR monthly, generating a CFDI (Comprobante Fiscal Digital por Internet) digital payroll receipt for each payment as a legal requirement. CFDIs must be issued via a government-authorised PAC (Proveedor Autorizado de Certificación). Failure to generate valid CFDIs can result in payroll being disallowed as a tax-deductible expense.

The national minimum wage in Mexico for 2025 is MXN 278.80 per day in the general zone, with a higher rate of MXN 419.88 per day applicable in the Northern Border Free Zone (Zona Libre de la Frontera Norte). Employers operating in the border zone must apply the elevated minimum wage to all employees working in the designated area.

Mandatory Benefits

Mexico’s Federal Labour Law mandates several benefits that significantly increase total employment cost beyond base salary. The Aguinaldo (Christmas bonus) is a minimum of 15 days’ salary, payable to each employee by December 20 each year. The vacation premium (Prima Vacacional) is a minimum of 25% of the salary attributable to each vacation day taken. PTU (Participación de los Trabajadores en las Utilidades — profit sharing) requires employers to distribute 10% of taxable income to eligible employees by May 31 each year.

Following the 2023 vacation reform, employees are entitled to a minimum of 12 working days of vacation after the first year, increasing to 14 days in year two, 16 days in year three, and continuing to grow with seniority. Food vouchers (Vales de Despensa) up to a statutory exempt value are also commonly provided as part of competitive compensation packages.

Employment Contracts and Labour Law

The Ley Federal del Trabajo (LFT) governs all employment relationships in Mexico. Written employment contracts are mandatory and must specify the type of work, salary, working hours, and place of work. Contracts must be in Spanish. Indefinite-term contracts are the default; fixed-term or project-based contracts are only permitted under specific, legally defined circumstances.

The standard working week varies by shift: 48 hours for the day shift, 45 hours for the mixed shift, and 42 hours for the night shift. Overtime is compensated at double the regular rate for the first nine hours beyond the standard week, and triple thereafter. Probation periods are limited to 30 days for general employees and 180 days for management, technical, or professional positions.

Leave Entitlements

Maternity leave in Mexico is 12 weeks at full pay (six weeks before and six weeks after birth), funded through IMSS. Paternity leave is five working days. Annual vacation entitlements increase with seniority as described under Mandatory Benefits above. Employees are also entitled to paid leave on all official public holidays, of which Mexico observes seven mandatory days plus additional state-specific holidays.

Employer Filing and Reporting Obligations

Employers in Mexico must meet several registration and filing obligations to remain compliant:

  • Register with the SAT to obtain an RFC (Registro Federal de Contribuyentes) employer tax number before processing the first payroll.
  • Register with IMSS as an employer and register each employee individually upon hiring.
  • Register with INFONAVIT and link each employee’s housing fund account.
  • Generate a CFDI digital payroll receipt (timbre fiscal) for every wage payment via an SAT-authorised PAC.
  • Calculate and withhold monthly ISR income tax from each employee’s salary.
  • Submit bimonthly IMSS, INFONAVIT, and SAR contributions via the SUA system by the 17th of the following month.
  • Pay Aguinaldo of at least 15 days’ salary to each employee by December 20 every year.
  • Calculate and distribute PTU (profit sharing) to eligible employees by May 31 each year.
  • File the annual ISR reconciliation (declaración anual) with the SAT by April 30.

The Inter-American Development Bank’s Mexico profile provides additional macroeconomic context on labour market developments and business environment trends that can inform workforce planning.

Penalties for Non-Compliance

The SAT enforces ISR compliance through fines, surcharges, and tax audits. Failure to issue valid CFDI payroll receipts is a serious violation that can result in payroll expenses being disallowed as a tax deduction, with significant financial consequences. IMSS enforces contribution obligations through employer audits and can assess retroactive contributions with surcharges and fines for under-declaration of the SDI.

INFONAVIT non-compliance results in fines and enforcement notices. Labour Law violations — including failure to pay Aguinaldo, underpayment of vacation premium, or non-payment of PTU — can be reported to the STPS and result in inspections, conciliation proceedings before the labour tribunal, and financial penalties.

What are the Benefits of Payroll Outsourcing in Mexico?

The primary benefit of outsourcing payroll in Mexico is managing the exceptional complexity of the country’s multi-stream obligations. The combination of IMSS, INFONAVIT, SAR, ISR, CFDI, PTU, and Aguinaldo creates a payroll environment that is among the most demanding in Latin America. A specialist provider with established SAT-authorised systems and IMSS filing expertise significantly reduces the risk of errors and penalties.

Outsourcing also delivers strategic value for nearshoring operations. As more international technology and manufacturing companies establish Mexican operations, a reliable payroll partner can scale with headcount growth and advise on evolving labour reforms, including ongoing updates to vacation entitlements and salary integration rules under the Federal Labour Law.

What are the Downsides of Payroll Outsourcing in Mexico?

Outsourcing payroll in Mexico requires entrusting confidential payroll data to a third party. Ensure your provider operates CFDI-compliant systems through an authorised PAC and maintains appropriate data security practices. Mexico’s Federal Law on Protection of Personal Data Held by Private Parties (LFPDPPP) governs data handling requirements.

For employers with complex compensation structures — involving variable bonuses, stock options, or multiple benefit components — ensuring your provider correctly calculates the SDI and applies the right IMSS rates for all benefit elements requires careful due diligence during the onboarding process.

How to Choose a Mexico Payroll Provider

Prioritise providers with active SAT authorisation, established IMSS employer registration experience, and demonstrated PTU calculation expertise. Experience in the nearshoring, manufacturing, technology, and BPO sectors is particularly valuable given their prevalence among international employers in Mexico.

Key criteria include: SAT-compliant CFDI generation capability, bimonthly SUA filing systems, transparent fee structures, MXN payroll processing, integration with HR or ERP systems, and references from international employers operating across Mexico or the broader Latin American region.

Payroll Outsourcing Alternative: Employer of Record in Mexico

If your company does not have a Mexican legal entity (such as a Sociedad Anónima de Capital Variable) and does not plan to establish one, an employer of record in Mexico may be the most efficient route to hiring. An EOR manages employment contracts, IMSS and INFONAVIT registration, CFDI generation, PTU, Aguinaldo, and full LFT compliance — allowing you to deploy staff in Mexico quickly without entity setup.

Get Started with Mexico Payroll Outsourcing

Managing payroll in Mexico requires navigating ISR income tax, IMSS social security, INFONAVIT housing fund contributions, SAR retirement savings, mandatory Aguinaldo, PTU profit sharing, and CFDI digital receipt generation — all within the framework of the Federal Labour Law. For most international employers, outsourcing to a Mexico-specialist provider is the most reliable path to full compliance.

Whether you need standalone payroll processing or a complete employer of record solution, our team manages SAT filings, IMSS registration, CFDI generation, and full LFT compliance — so you can focus on growing your nearshoring operations. Get in touch with our Mexico payroll team today.