Mexico’s 40-Hour Workweek and the Phase-In to 2030

One reform, four moving parts

The headline is simple: a 48-hour week becomes a 40-hour week. But the reform an employer has to plan around has four parts that move together. The hours come down on a schedule. Pay and benefits are held flat by law. The overtime rules change as the week shrinks. And the way hours are recorded is being tightened. Read the four parts as the map of the work, then hold them against your own operation in Mexico.

1. A phased cut in the maximum week. The statutory maximum falls from 48 hours to 40, two hours each year. The reduction begins 1 January 2027 and reaches 40 hours in 2030. The phased design is meant to let operations and labor markets adjust without an abrupt shock.
2. Pay and benefits cannot fall with the hours. The amendment states expressly that the reduction in weekly hours cannot reduce wages, salaries, or benefits, directly or indirectly. Fewer scheduled hours at the same pay is the intended outcome, not a basis for a pay cut.
3. A widening overtime cap, and limits. As the ordinary week shrinks, the permitted overtime band widens on its own schedule, paid at premium rates. The combined total of ordinary and overtime hours may not exceed twelve in a single day. Overtime is capped per week and may be spread across no more than four days. Overtime for workers under 18 is prohibited.
4. Record-keeping and rest unchanged in principle, tightened in practice. The existing right to one full paid rest day for every six days worked is unchanged. The reform points toward mandatory electronic timekeeping. The scope, the start, and any exemptions for the smallest employers are to be defined by the Ministry of Labor and Social Welfare.

The schedule is the anchor, but the four parts bind together. The next sections take the schedule itself, then the overtime and timekeeping rules that ride alongside it. Then the pay-protection guarantee, and then where employers misread the change.

Who the reform reaches and when

The change is set at the constitutional level and carried into the Federal Labor Law. It reaches employment relationships across Mexico rather than a single sector. Unlike some recent reforms in the region, it does not carve out transitional regimes for specific industries. A labor-intensive operation does not get a separate, slower clock. What differs by employer is exposure, not coverage. An operation that already runs a 40-hour week, or close to it, has little to do on hours and more to do on documentation. An operation that runs a full 48-hour week faces the largest coverage gap and the steepest planning task. That is common in manufacturing, logistics, and continuous-shift settings. Every two-hour cut has to be covered by added staff, added overtime, or a redesigned shift pattern. The timetable is the same for all of them. The constitutional amendment is already in force, and the effective reduction in hours begins 1 January 2027 and runs through 2030.

The four-year phase-in, two hours at a time

The reduction is gradual and fixed. The maximum week holds at 48 hours through 2026, then steps down by two hours at the start of each year until it reaches 40. The schedule is the planning backbone, because each step is a known date with a known size. That is what lets an employer model the coverage gap and the cost in advance, rather than reacting when a cut lands.

1. 2026: 48 hours. No change to the maximum week. The constitutional amendment is in force and the Federal Labor Law is amended, but the effective reduction has not yet begun.
2. 2027: 46 hours. The first cut, effective 1 January 2027. Two hours come off the ordinary week. This is the year the operational change becomes real for a 48-hour operation.
3. 2028: 44 hours. The second cut. Four hours now off the original 48.
4. 2029: 42 hours. The third cut. Six hours off the original 48.
5. 2030: 40 hours. The final step. The ordinary maximum reaches 40 hours, eight hours below where it started.

For an operation at the full 48 hours, the cumulative effect by 2030 is eight ordinary hours per employee per week. Those hours have to be absorbed without cutting pay. Multiplied across a workforce, that gap is the number worth sizing now. The cost of covering it, whether through headcount or overtime, is the real financial weight of the reform.

The overtime cap, the daily ceiling, and electronic records

As the ordinary week shrinks, the rules on extra hours move with it. The reform pairs the reduced week with a permitted overtime band that widens year by year on its own schedule. The practical ceiling on total weekly hours therefore does not drop as fast as the ordinary week. Overtime is paid at a premium, the double-time and triple-time bands familiar under the Federal Labor Law, and it is bounded. The combined total of ordinary and overtime hours may not exceed twelve in any single day. Weekly overtime is capped, and it may be distributed across no more than four days a week. Overtime is also expressly prohibited for workers under 18. The second tightening is on records. The reform moves toward mandatory electronic timekeeping so that hours and overtime can be verified by inspectors. The scope, the effective date, and any exemption for micro and small employers are to be defined by the Ministry of Labor and Social Welfare. Non-compliance with the overtime and scheduling rules carries fines measured in Units of Measure and Update. In serious cases the framework ties overtime abuse to other enforcement regimes. The practical message is to be able to show clean hour-by-hour records rather than to rely on a manual log.

Why pay and benefits cannot fall with the hours

The single most important protection in the reform is also the easiest to get wrong in planning. The amendment states that reducing the weekly hours cannot reduce wages, salaries, or benefits. An employee who earns a weekly salary for a 48-hour week keeps that salary when the week becomes 46, then 44, and so on. The reform does not convert salaried pay into a lower hourly equivalent. It does not permit an indirect cut dressed up as a schedule change. That is why the cost an employer models is always the cost of covering the lost productive hours, never a saving. The honest framing for any internal communication and any employee notice is the one the law requires. The hours come down, the pay holds, and the business decides how to cover the gap those hours leave.

Four ways employers misread the change

• Treating it as a one-time switch in 2030.The cut is phased and starts in 2027, not 2030. An operation that waits for the final 40-hour figure misses three earlier two-hour reductions and the coverage decisions each one forces. The schedule is the work. 2027 is the first real date.
• Cutting pay along with the hours.The reform forbids it. Lowering weekly salary because the week is shorter, or converting salaried pay to a reduced hourly rate, is exactly the move the amendment blocks. Pay and benefits hold flat as the hours fall.
• Assuming an industry exemption will arrive.The reform was enacted without sector-specific transitional regimes. A labor-intensive or continuous-shift operation runs on the same timetable as everyone else. Planning on a hoped-for carve-out is planning on something the reform did not include.
• Leaving timekeeping and overtime records as they are.The reform tightens hour records and the overtime regime, with electronic timekeeping detail still being set by the labor ministry. Relying on a manual or approximate log is the exposure inspectors are being equipped to find. So is losing track of the daily twelve-hour ceiling and the weekly overtime cap.

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