Working-hour regulations in Mexico have remained largely unchanged for more than a century, shaping a model that historically prioritized time spent at work over productivity per hour. For international investors considering Mexico as a manufacturing destination, understanding this historical evolution is essential to anticipating the changes that will reshape the country’s labor landscape in the years ahead.
With the enactment of Mexico’s Constitution in 1917, Article 123 marked a historic milestone for workers’ rights by establishing a maximum eight-hour workday and a six-day workweek followed by one day of rest. While this structure may seem standard today, at the time it represented a major social achievement and laid the foundation for Mexico’s standard 48-hour workweek, later regulated under Article 69 of the Federal Labor Law.
For decades, this framework remained largely unchanged, reinforcing an organizational culture that placed greater emphasis on time spent at work than on productivity per hour. What began as a worker protection gradually became the maximum limit that many companies adopted as their operating standard, even as the economic environment continued to evolve.
Mexico’s import substitution industrialization (ISI) model, implemented from the 1940s through the 1980s, further reinforced the 48-hour workweek. This protectionist approach sought to develop domestic industry by producing locally many of the goods that had previously been imported. In this context, the availability of a large, relatively low-cost workforce became a structural competitive advantage.
Factories required large numbers of workers to maintain continuous production lines, and the 48-hour workweek fit this industrial model well. Investment in technology and automation often took a back seat to the availability of labor. This pattern of economic growth, focused more on labor volume than productivity, left a lasting mark on Mexico’s organizational culture that remains visible across many industries today.
For more than a century, Mexico’s labor model remained largely unchanged. Its competitiveness was built around the availability of abundant, relatively low-cost labor, while investment in technology and automation often took a secondary role. As other economies moved toward shorter working hours and new generations reshaped expectations around work, the limitations of this model became increasingly visible.
In a hyperconnected world where remote work and flexible schedules have become increasingly common, maintaining a 48-hour workweek began to seem outdated. Social pressure grew through movements such as “Yo Por Las 40 Horas” (“I Support the 40-Hour Workweek”), which called for Mexico’s labor laws to align more closely with International Labour Organization (ILO) guidelines—particularly Convention No. 47 and Recommendation No. 116, which promote the 40-hour workweek as a goal for improving worker well-being.
The proposal ultimately became national policy under President Claudia Sheinbaum’s administration and Labor and Social Welfare Secretary Marat Bolaños. To help reduce the operational impact on businesses, the federal government promoted a tripartite dialogue process involving government, employers, and labor representatives from June 2 to July 7, 2025.
The resulting consensus paved the way for the constitutional reform decree published in Mexico’s Official Gazette (DOF) on March 3, 2026, followed by amendments to the Federal Labor Law (LFT) on May 1, 2026. The reform establishes a gradual transition beginning on January 1, 2027, and ending on January 1, 2030, reducing the maximum workweek by two hours each year.
Manufacturing companies that understand how Mexico’s labor model evolved are better positioned to manage this transition. Those that prepare for shorter workweeks by investing in technology, automation, and results-based operating models can go beyond compliance and build a more sustainable competitive advantage.
The recurring questions our clients ask are: Is Mexico becoming more expensive? Is this trend sustainable? Is it still competitive?
Reducing working hours does not have to be an obstacle. It can be an opportunity to rethink production processes, improve talent retention, and align operations more closely with the global standards international investors increasingly expect. Read Alvaro Garcia's, VP of Human Resources at Prodensa, perspectives about the 40 hours.
40-Hour Workweek: A labor model that limits the standard workweek to 40 hours. Mexico will gradually transition from 48 to 40 hours between 2027 and 2030.
Federal Labor Law (LFT): Mexico’s primary labor legislation, regulating working hours, employment conditions, employee rights, and employer obligations.
International Labour Organization (ILO): A United Nations agency that develops international labor standards and promotes policies related to working conditions and worker well-being.
Import Substitution Industrialization (ISI): An economic strategy focused on replacing imported goods with domestic production. In Mexico, this model shaped industrial development from the 1940s through the 1980s and reinforced labor-intensive manufacturing.
When will Mexico’s 40-hour workweek take effect?
The gradual transition begins on January 1, 2027, and is expected to conclude on January 1, 2030, with the maximum workweek decreasing by two hours each year.
Will employee salaries be reduced as working hours decrease?
No. The reform is designed to reduce the maximum workweek without reducing employee pay.
How should manufacturers prepare for the transition?
Companies should begin reviewing staffing models, shift structures, production schedules, automation opportunities, and productivity per hour before the reductions take effect.
Why does the 40-hour workweek matter for manufacturers in Mexico?
For labor-intensive operations, fewer available working hours may require adjustments to workforce planning and production models. Companies that prepare early can use the transition to improve productivity, efficiency, and talent retention.
Notice: The content of this blog is developed by Prodensa for informational and educational purposes regarding nearshoring, foreign trade, human capital, and manufacturing in Mexico. Although we strive to keep the information accurate and up to date, laws and regulations may change. This material is not a substitute for specialized professional advice. Prodensa is not responsible for decisions made based on this content without appropriate professional consultation.