By industry · 4 min read
Attendance control for dental offices: how to comply with the law
Short answer
A dental office can meet the electronic working-time record requirement with a QR code printed on site, which each person scans with their phone. The law requires recording each person's start and end time; it does not require a wall-mounted time clock.
How work happens at a dental office
A dental office employs dental assistants, receptionists and hygienists, with morning and afternoon shifts plus Saturdays. That brings three challenges for measuring working hours:
- The team is three or four people.
- Long treatments run past the end of the shift.
- Nobody keeps a formal record.
What the law requires of dental offices
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.
How to record working time at a dental office
- 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. With four people, the daily review takes a minute: you see who arrived, who is missing and whether anyone went past their time.
How much is the fine for not recording
How to do the math by hand
The minimum fine is 250 × $117.31 = $29,327.50. The maximum is 5,000 × $117.31 = $586,550. If the penalty is calculated per person, with 5 people the range goes from $146,637.50 to $2,932,750.
Common mistakes at a dental office
- Keeping attendance from memory or in a notebook.
- Recording the clock-in and forgetting the clock-out.
What to check every day and every week
Every day.
- Who did not record their clock-in or clock-out.
- Departures later than planned.
Every week.
- Each person's overtime against the weekly cap.
- Rest days that were actually taken.
How much an overtime hour costs: example in pesos
Suppose a daily wage of $450 on a day shift. The ordinary hourly rate is $56.25. One overtime hour at double time costs $112.50 and one at triple time, $168.75. If a person works 9 overtime hours in a week in 2027, that is $1,012.50 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
Day shift: schedule and maximum length. The day shift is the one worked between 6:00 a.m. and 8:00 p.m.
What is NOM-035. NOM-035 is the STPS standard that requires identifying and preventing psychosocial risk factors at work, such as excessive workloads and long workdays.
What is the contribution base salary (SBC). The contribution base salary is the salary used to calculate IMSS contributions and INFONAVIT contributions.
Frequently asked questions
Does a dental office 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.
Is the maximum workday per day or per week?
There are two limits: a daily one, which did not change, and a weekly one, which drops from 48 to 40 hours between 2027 and 2030.
Is overtime counted by week?
Yes. The cap on double-time overtime is weekly and per person.
Can someone work more than 12 hours in a day?
No. The sum of ordinary and overtime hours cannot exceed 12 hours per day.
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.