Is it legal to work more than 9 hours a day?

“Is it legal to work more than 9 hours a day?” is a question that comes up as soon as there is a workload spike, a month-end close or a shift that runs long. The short answer is yes, but only under certain conditions. The ordinary working day is capped at 9 hours a day, and going beyond that requires an agreement and, above all, respecting the rest between shifts. We explain it from a staff manager’s point of view.

Quick answer

Situation	Can you go beyond 9 hours?
Ordinary working day with no special agreement	No more than 9 hours of effective work a day
Collective or company agreement with another distribution	Yes, respecting the 12-hour rest
Hours above the agreed ordinary working day	They are overtime (limit of 80 a year)
Workers under 18	No. Maximum 8 hours a day, no exceptions
Rest between the end of one day and the start of the next	Always a minimum of 12 hours

What the Workers’ Statute says

The limit is set out in article 34.3 of the Workers’ Statute (Estatuto de los Trabajadores):

“The number of ordinary hours of effective work may not exceed nine per day, unless, by collective agreement or, failing that, by agreement between the company and the workers’ representatives, a different distribution of daily working time is established, respecting in all cases the rest between shifts.”

Two key ideas come out of this. The ordinary working day is capped at 9 effective hours a day, and that cap can only be shifted through an agreement (collective agreement or company agreement). Outside such an agreement, no one should regularly work more than 9 ordinary hours.

The two ways to go beyond 9 hours a day

The law allows the working day to be made more flexible in two ways.

1. Collective agreement or company agreement. These can set daily shifts longer than 9 hours during certain periods (campaigns, peak season) in exchange for shorter days at other times. It is common in retail, logistics and the agri-food sector.

2. Irregular distribution of 10%. Article 34.2 of the Workers’ Statute allows the company, even without a specific agreement, to distribute up to 10% of the working time irregularly across the year. That lets it concentrate hours in heavier weeks without generating overtime, as long as it respects the rest periods.

In both cases the margin has a ceiling that is not open to negotiation: the rest between shifts.

The 12-hour rest is the real cap

No matter how many agreements are in place, there must be at least 12 hours between the end of one shift and the start of the next. It is a non-waivable rest, it cannot be given up or swapped for money. We look at it in depth in how many hours of rest there must be between shifts.

That rest is what sets the real daily maximum. If a worker has to rest 12 hours, in a 24-hour day only 12 are left as margin, and that is before counting the mandatory break. On shifts longer than 6 hours, in addition, a 15-minute break applies (30 for minors). That is why, in practice, there is no regular working day of 12 effective hours: the law squeezes it out through the rest requirement.

When the extra hours are overtime

This is where the most common confusion lies. A working day exceeding 9 hours does not automatically turn into overtime. What counts is each worker’s agreed ordinary working day:

• If the ordinary working day has been lawfully redistributed and a particular day calls for 10 hours, those hours are ordinary, not overtime.
• If the worker exceeds their ordinary working day without that redistribution in place, the extra hours are overtime, with the limit of 80 a year (art. 35.2 of the Workers’ Statute) and their own regime of payment or compensation.

If you want to manage the excess as flexibility rather than overtime, you may be interested in the hour bank, which distributes working hours irregularly within the year.

Special cases

Workers under 18. They cannot work more than 8 hours of effective work a day, including training time and adding up the hours from all their employers. They also cannot work overtime or at night.

Special working days (RD 1561/1995). In hospitality, transport, shift work or at sea, the rest between shifts can drop to 10 hours with alternative rest, which in turn widens the daily margin. It is the exception, not the rule.

What the company risks if it crosses the line

Scheduling shifts above what is allowed, or failing to respect the 12-hour rest, is no small matter. The Labour Inspectorate can penalise it as a working-hours infringement, and in an individual dispute the worker can claim the extra hours worked. The underlying problem is usually the same as in overtime claims: without a reliable record, the company cannot prove how many hours were actually worked or that it respected the rest periods, and the courts have been accepting the worker’s version when the record is missing or can be tampered with. We saw this in the Supreme Court’s position on the burden of proof and in how digital time tracking protects the company against claims.

How Cleverfy solves it

Cleverfy is time-tracking and working-hours software for SMEs and self-employed professionals that turns the working-day limit into something that monitors itself.

• Alerts you when a day exceeds the maximum hours so you can fix it before it becomes a problem.
• Monitors the 12-hour rest between shifts and warns you if the margin between the end of one shift and the start of the next falls short.
• Separates ordinary hours from overtime and totals them each month, with the annual cap in plain sight.
• Supports the irregular distribution of working hours to spread hours across heavier and lighter weeks without generating overtime.
• Generates the report ready for the Inspectorate with each employee’s real hours and the rest periods respected.

With the new Royal Decree on time tracking still going through its legislative stages, that record will also have to be digital and tamper-proof.

Try Cleverfy free for 14 days → · See plans from 1,20 €/user →

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This article is general information about working-hours and time-tracking regulations and does not constitute legal advice. Collective agreements may set specific conditions, so it is worth checking yours before making decisions.

Sources:

• Workers’ Statute, art. 34 (working hours)
• Workers’ Statute, art. 35 (overtime)
• Royal Decree 1561/1995 on special working days