By industry · 5 min read
Electronic working-time record for factories and manufacturing plants
Short answer
A manufacturing plant can comply with the electronic working-time record with a QR code printed on the premises, which each person scans with their phone. The law asks for recording each person's start and end times; it does not ask for a wall-mounted time clock.
How work is done at a manufacturing plant
A manufacturing plant employs operators, supervisors, maintenance and quality staff, with three rotating shifts and scheduled overtime. That brings three challenges for measuring working time:
- Overtime is a normal part of production.
- Shifts rotate every week.
- Hundreds of people clock in at the same time.
What the law asks of factories and manufacturing plants
Since the 2026 reform, the Federal Labor Law requires recording electronically the start and end time of each worker's workday (article 132, section XXXIV). Failing to do so is fined 250 to 5,000 UMA. The STPS will define who it applies to and what exceptions there will be. The details are in the reform guide.
Night shifts. A night shift lasts 7 hours at most, one less than a day shift. It helps if the record separates night hours from day hours.
Work peaks. Overtime has a weekly cap: 9 hours at double time in 2027, with a maximum of 4 per day on no more than 4 days, and never more than 12 total hours in a day.
Staff turnover. Each new person must clock in from their first day. With an app, registering them takes minutes.
How to record working time at a manufacturing plant
- Register the workplace and its shifts.
- Print the QR code and post it at the entrance or next to the register.
- Each person scans it on arrival, when leaving for a break and when going home.
- At the end of the day you review what does not add up and download the report whenever you need it.
Example. If the plant schedules overtime every week, the weekly cap per person is the figure to watch.
Calculate your overtime
How to do the math by hand
Take a salary of $400 per day on a day shift. The ordinary hour is worth 400 ÷ 8 = $50. In 2027, with 11 overtime hours in the week, the first 9 are paid at double time (9 × $100 = $900) and the remaining 2 at triple time (2 × $150 = $300). Total: $1,200.
Common mistakes at a manufacturing plant
- Keeping attendance from memory or in a notebook.
- Recording the clock-in and forgetting the clock-out.
- Not separating night hours, which have a lower daily maximum.
- Covering peaks only with overtime, until exceeding the weekly cap.
- Leaving new people without a record during their first days.
What to check every day and every week
Every day.
- Who did not record their clock-in or clock-out.
- Shifts that went over their daily maximum.
- Departures later than planned.
Every week.
- Each person's overtime against the weekly cap.
- Days when someone came close to 12 hours.
- Rest days that were actually taken.
How much an overtime hour costs: example in pesos
Suppose a daily wage of $400 on a day shift. The ordinary hourly rate is $50. One overtime hour at double time costs $100 and one at triple time, $150. If a person works 9 overtime hours in a week in 2027, that is $900 extra.
It is an example to show the calculation, not a reference wage for the sector.
What changes every year, from 2026 to 2030
| Year | Maximum working hours | Double-time overtime | Triple-time overtime |
|---|---|---|---|
| 2026 | 48 h | 9 h | 4 h |
| 2027 | 46 h | 9 h | 4 h |
| 2028 | 44 h | 10 h | 4 h |
| 2029 | 42 h | 11 h | 4 h |
| 2030 | 40 h | 12 h | 4 h |
Decree published in the Official Gazette of the Federation on May 1, 2026, second and fourth transitory provisions, and article 68 of the LFT. Each change applies from January 1.
Related terms
What is PROFEDET. PROFEDET is the Federal Labor Defense Attorney's Office (Procuraduría Federal de la Defensa del Trabajo).
What are the internal work regulations. The internal work regulations are the document with the mandatory rules inside the company: schedules, breaks, pay days and disciplinary measures.
What is the seventh day (séptimo día). The seventh day is the paid rest day, at full salary, that every person is entitled to for every six days worked.
Frequently asked questions
Does a manufacturing plant need to buy a time clock?
No. The law requires an electronic record of working time, not a device. An app on a phone complies.
What options are there for recording working time?
An app on each person's phone, a shared tablet or a clock connected to a system. All three comply if they generate an electronic record per person, with a start and an end time.
How are shifts that cross midnight recorded?
Clock-in and clock-out are saved with their actual date and time, and the hours are added up even if the day changes.
Can I ask for more overtime in peak season?
The weekly cap is not extended for the season. It helps to plan relief staff.
Is overtime counted by week?
Yes. The cap on double-time overtime is weekly and per person.
Legal basis and sources
- Electronic working-time record: article 132, section XXXIV, of the LFT and fifth transitory provision of the decree.
- Overtime: articles 66 and 68 of the LFT and fourth transitory provision of the decree.
- Working hours: articles 58 to 64 of the LFT and second transitory provision of the decree.
- Decree amending the Federal Labor Law on the reduction of the working week. Official Gazette of the Federation, May 1, 2026.
- Federal Labor Law, current text. Chamber of Deputies.
How we write this content. The Sicheca team writes it from the official text of the law. When something is not yet defined by the authority, we say so. It is general information and does not replace the advice of a lawyer or an accountant.