Hour Bank: What It Is, How It Works and How to Track It

The hour bank (bolsa de horas) is one of the most widely used workplace flexibility systems in Spain, but also one of the most misunderstood. Many companies confuse it with overtime or apply it without meeting legal requirements.

In this guide, we explain exactly what it is, how it works under the law, and how to track it properly to avoid problems with Labour Inspection.

What is an hour bank?

An hour bank is a legal system that allows companies to distribute part of the annual working hours irregularly. Instead of always working the same hours each week, the company can increase or decrease the workday during certain periods based on production needs.

The key difference from overtime: an hour bank doesn’t change the total annual hours. It just distributes them flexibly. If an employee works more hours one week, they compensate by working fewer hours another week.

Practical example

A worker with a 40-hour weekly schedule can work 42 hours during a high-demand week (peak season, month-end closing, etc.) and then work 33 hours another week to compensate.

The annual total remains the same. There are no overtime hours to pay.

Legal framework: Article 34.2 of the Workers’ Statute

The hour bank is regulated in Article 34.2 of the Workers’ Statute:

“Through collective agreement or, failing that, agreement between the company and workers’ representatives, irregular distribution of working hours throughout the year may be established. In the absence of an agreement, the company may irregularly distribute 10% of working hours throughout the year.”

Mandatory legal requirements

• Maximum limit: 10% of annual working hours
• Prior notice: Minimum 5 days before schedule change
• Recording: Mandatory to track modified hours
• Compensation: Extra hours must be compensated with equivalent rest
• Rest periods: Respect minimum rest between shifts (12h) and days off

What does 10% mean in practice?

For a full-time worker with 40 weekly hours:

• Approximate annual hours: 1,800 hours
• 10% = 180 hours the company can redistribute

This equals about 3.5 hours per week on average that can be moved from one period to another.

Positive and negative hour balances

The hour bank balance can be positive or negative depending on whether the worker has worked more or less than expected:

✅ Positive hours

The worker has worked more hours than agreed for that period. They have hours “in their favour” that the company must compensate with rest time.

Example: Works 42h in a 40h week → has +2 positive hours.

❌ Negative hours

The worker has worked fewer hours than agreed. They have a balance “against them” that must be recovered later.

Example: Works 32h in a 40h week → has -8 negative hours.

Are they paid as overtime?

No. As long as the balance is compensated within the year and doesn’t exceed 10% of annual hours, they aren’t considered overtime. They don’t generate premiums or separate payment.

What’s legal vs. what’s not

✅ Legal

• Distributing up to 10% of annual hours irregularly
• Notifying the worker 5 days in advance
• Compensating positive hours with equivalent time off
• Having the hour bank regulated in a collective agreement or internal accord

❌ Illegal

• Exceeding 10% of hours without paying as overtime
• Changing the schedule without 5 days’ notice
• Not recording hours worked
• Applying the hour bank without regulation in agreement
• Violating minimum rest periods between shifts

Hour bank vs. irregular daily schedule

There’s a very common confusion: an hour bank is not the same as having an irregular schedule.

Irregular daily schedule:

• Monday you work 6h, Tuesday 8h, Wednesday 9h…
• But at the end of the week you’ve done your contracted 40h
• This is not an hour bank — it’s simply a flexible schedule that balances each week

Hour bank:

• One week you work 42h, another week 33h
• There’s a weekly imbalance that gets compensated throughout the year
• This is where the 10% limit applies

Why does the difference matter?

If your company has irregular schedules but they balance each week, you don’t need to worry about the 10% limit. You just need a system that ensures weekly hours are met.

With Cleverfy you can configure schedules with weekly or monthly calculation. The system automatically calculates the hour balance and alerts you if there are deviations — whether you use an hour bank or simply have irregular schedules that need to balance each week.

How to properly record hour banks

Time tracking is mandatory in Spain, and this includes hour bank variations. With the new Royal Decree in process, records must be digital and accessible to Labour Inspection.

What must be recorded

1. Start and end time of each workday (with minutes)
2. Breaks taken
3. Accumulated balance of positive/negative hours
4. Change history with traceability

Common mistakes

• Recording only theoretical hours: If the worker did 42h but you record 40h, you’re falsifying records.
• Not tracking the balance: Without accumulated control, it’s impossible to know if the 10% limit is being respected.
• Verbal compensation agreements: Compensations must be recorded, not informally agreed.

How to manage hour banks with Cleverfy

With Cleverfy you can manage hour banks automatically:

• Digital recording of all workdays (start, end, breaks)
• Automatic calculation of positive/negative hour balance
• Alerts when an employee approaches the 10% limit
• Reports for Labour Inspection in one click
• Compliance with the Royal Decree on time tracking

Want to see how it works? Request a free demo or start your 14-day trial.

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Frequently asked questions

Can the company force me to use an hour bank?

Yes, as long as it’s regulated in the collective agreement or there’s an accord with workers’ representatives. Even without an agreement, the company can redistribute up to 10% of hours, but must give 5 days’ notice.

What happens if I end the year with uncompensated positive hours?

They should be paid as overtime or compensated with rest. If the company doesn’t, the worker can file a claim.

Does the hour bank apply the same way to part-time workers?

Yes, but the 10% is calculated on the hours agreed in the contract, not full-time hours.

Is it the same as flexible working hours?

Not exactly. Flexible hours usually refers to choosing what time to start/finish. The hour bank allows varying the total number of hours worked in a period.

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Sources: Workers’ Statute, Art. 34