Ways to clock in at work: 6 methods and which one meets the law

When you only have two or three employees, jotting down the hours in a notebook seems enough. But as soon as the team grows, that manual control slips out of your hands: sheets that go missing, signatures that are missing and, above all, a record that the Inspección de Trabajo (Spain’s Labour Inspectorate) would not accept in the event of a visit. Choosing well how your workers clock in stops being a detail and becomes a decision that saves you penalties and hours of admin. In this article we go through the six most common ways of clocking in at a company and help you decide which one fits yours.

Why is clocking in at work mandatory?

Recording working hours is not optional. Since the Real Decreto-ley 8/2019 came into force, every company is required to keep a daily record of each worker’s working day, with the start and end times. The rules have been tightened over time and, in 2026, the time record must be digital, accessible in real time to the Inspección and kept for four years.

Beyond the legal obligation, clocking in properly brings you concrete management benefits:

• You avoid penalties. Infringements for failing to keep a valid record can run to several thousand euros per workplace.
• You keep overtime under control. You know exactly who is doing it and you can compensate or pay for it correctly.
• You make better decisions. With real data on time spent, you can adjust shifts, workloads and headcount.
• You protect your company and your team. The record serves as evidence for both the company and the worker in any labour dispute.

Methods for rolling out employee clocking in

There is no single correct way to clock in: the law does not impose a specific format, it only requires the system to be reliable, objective and accessible. What matters is that the method you choose is quick and natural for your team, because an awkward system ends up full of missed entries and corrections. These are the six most widespread options.

1. Biometric access control

This involves identifying the worker by fingerprint, facial recognition or iris scan. It is a very reliable method because no one can clock in for someone else.

Its main drawback today is legal: in 2023 the Agencia Española de Protección de Datos (AEPD, Spain’s data protection authority) tightened its criteria and considers biometric data to be a special category. Except in very justified cases, the worker’s consent is not enough to use them solely for clocking in, so biometrics are no longer recommended as a general time-tracking system.

2. Mobile app clocking-in system

The worker clocks in from their phone with a couple of taps. It is the most practical option for sales reps, field technicians, multi-site staff and remote workers, since it lets them record their working day from anywhere. Many apps add geolocation at the moment of clocking in to verify the location without continuously tracking the employee.

It is, by far, the method that has grown the most among SMEs. With a well-designed time-tracking app, clocking in takes no more effort than sending a message.

3. Software on a computer or in the cloud

Clocking in is done from the browser or a desktop application, ideal for teams that work at a computer. Being in the cloud, records are centralised automatically, can be viewed in real time and are exported to PDF or Excel to present to the Inspección or your payroll adviser.

It is the foundation of any modern time-tracking software and is usually combined with the mobile app to cover the whole workforce, wherever they are.

4. Manual control with signature sheets

Paper templates or a shared spreadsheet are the cheapest system and the starting point for many small companies. It works with a couple of workers, but it does not scale: it is easy to tamper with, signatures get forgotten and reconstructing a whole month is a nightmare.

On top of that, a paper record can hardly meet the real-time accessibility requirement demanded by the 2026 rules, so today it is considered a transitional solution, not a definitive one.

5. Identification card

The employee swipes a card (magnetic-stripe, RFID or proximity) through a reader when entering and leaving. It is a classic in factories and warehouses with physical access control, comfortable and quick to use.

Its limits: it requires installing hardware at each clocking-in point, the card can be lent or lost and it is no use for anyone working away from the premises. It is usually combined with software that centralises the data from the readers.

6. QR code on the phone

Each site or each shift displays a QR code that the worker scans with their phone to clock in. It is a very quick and cheap option for hospitality, retail or events, where staff rotate between sites and do not always carry a card.

Since the scan is recorded with time and location, it offers traceability without the need to install expensive terminals at each venue.

Which is the best way to clock in and comply with the rules?

There is no universal method: the best way to clock in is the one that best fits your type of work while also complying with the law. As a quick guide:

• Office or work at a computer: cloud software.
• Teams on the move (sales reps, technicians, site work): mobile app with geolocation.
• Remote or hybrid working: app and software combined, with a record accessible from home.
• Hospitality and retail with shifts: QR or mobile app.
• Factory or warehouse with access control: identification card connected to software.

In practice, the clear trend among SMEs is to combine a mobile app and cloud software: it covers the whole team wherever they are, centralises the data and automatically generates the reports the Inspección requires. If you also manage rotating shifts, it is worth having your clocking-in system integrate with your shift management software, so the actual record is compared against the planned rota without extra work.

Whatever method you choose, make sure it meets three requirements set by the rules in force: a reliable and tamper-proof record, real-time accessibility for the company, the worker and the Inspección, and retention of the data for four years. With those three points covered, clocking in stops being an administrative burden and becomes a source of useful data for running your company better.