Why working time documentation is a legal requirement

Documenting working hours is not a voluntary measure but a legal obligation for every employer in Austria. The Working Time Act (AZG) stipulates that the daily working hours of all employees must be recorded completely and traceably.

This obligation serves several purposes:

  • Protection of employees against excessive working hours and exploitation
  • Monitoring compliance with rest periods, breaks, and maximum working hours
  • Basis for correct payroll and overtime compensation
  • Transparency in disputes between employer and employee
  • Proof of compliance during authority inspections and audits

The Working Time Act (AZG) obliges employers under § 26 to keep records of the start and end of daily working time as well as the duration of rest breaks. Violations are subject to administrative fines of up to €2,180 per employee.

What data must be documented?

Working time documentation must contain certain minimum details in order to meet the legal requirements. The following data is mandatory:

1. Start and end of working time

For each working day it must be documented when work began and when it ended – to the minute. An approximate indication ("between 8 and 9 o'clock") is not sufficient.

2. Rest breaks

Breaks must not only be recorded in terms of time (start and end), but it must also be documented that the legally prescribed minimum breaks were observed:

  • For more than 6 hours of working time: at least 30 minutes' break
  • For more than 9 hours of working time: at least 45 minutes' break

3. Total working time per day

The daily net working time (excluding breaks) must be clearly visible. This information is decisive for monitoring maximum working hours (generally 10 hours per day, up to 12 hours in certain exceptional cases).

4. Name and identification of the employee

Every time record must be unambiguously assignable to the respective employee – by name, personnel number, or comparable identification.

5. Date

The date of the work performed must be clearly documented in order to be able to trace weekly working hours and rest periods between working days.

Optional but recommended information

In addition to the mandatory details, it is advisable to record the following information:

  • Project or client assignment (for post-calculation and service billing)
  • Type of activity (productive work, holiday, sick leave, time off in lieu)
  • Overtime classification (standard overtime, additional hours, hours subject to surcharges)
  • Place of work (especially for mobile employees)

Who is subject to the documentation obligation?

The obligation to document working time applies in principle to all employers in Austria, regardless of:

  • Industry or economic sector
  • Company size (including micro-enterprises with few employees)
  • Type of employment (full-time, part-time, marginal employment)
  • Place of work (office, home office, construction site, field service)

Exceptions and special cases

An exemption from the recording obligation exists only for certain senior executives who can largely determine their own working hours. In practice, however, this affects only a very small group of people – and even here voluntary documentation is often advisable for employment law and tax reasons.

Common mistakes in working time documentation

Mistake 1: Retrospective recording

Many companies have employees fill in their working hours from memory at the end of the week or month. This contradicts the principle of objective and reliable recording. Working hours must be documented promptly, ideally in real time.

Mistake 2: Missing break documentation

Often only the start and end of work are recorded, but not the breaks actually taken. This can cause problems during inspections – particularly when break times are deducted as a flat rate without breaks actually having been taken.

Mistake 3: Incomplete records

Individual missing days, illegible entries, or missing signatures render records unusable. Gapless documentation is absolutely mandatory.

Mistake 4: No centralised archiving

Paper timesheets that remain with employees or are filed in various folders are difficult to compile during inspections. Records must be archived centrally, securely, and retrievable at any time.

Mistake 5: Insufficient retention

The statutory retention obligation is at least three years. If records are destroyed earlier or are lost, this can lead to significant problems during later inspections or employment law disputes.

MistakeConsequencesPrevention
Retrospective recordingNot objective, legally contestable Prompt or real-time recording
Missing breaksViolation of occupational health and safety Automatic break monitoring
Incomplete dataAdministrative fine possible Mandatory field validation in the system
Decentralised filingDifficult to locate during inspection Centralised digital archiving
Retention period too shortMissing evidence in disputes Automatic 3-year storage

Step by step: Introducing legally compliant working time documentation

Step 1: Choose a system

Decide on a recording system that meets the legal requirements:

  • Paper timesheets with a clear structure
  • Excel templates with version control
  • Digital time-tracking software (recommended)

Step 2: Inform employees

Communicate clearly why time tracking is being introduced and how it works. For digital systems, a works agreement is often required.

Step 3: Define the recording method

Specify how times are to be recorded:

  • Time clock at the entrance (for stationary workplaces)
  • App on the smartphone (for mobile employees)
  • Browser-based recording (for home office and office)
  • NFC tags or QR codes (for construction sites and field service)

Step 4: Define mandatory fields

Ensure that your system captures the following data:

  • Date
  • Employee (name/ID)
  • Start of work (time)
  • End of work (time)
  • Start and end of break
  • Total working time

Step 5: Establish a review and approval process

Define who reviews and approves time records – typically team leaders or line managers. This improves data quality and reduces errors.

Step 6: Ensure archiving

Set up a secure storage location that meets the three-year retention obligation. With digital systems this is usually done automatically.

Step 7: Regular checks

Carry out spot checks to verify that records are complete and correct. Provide additional training to employees when errors occur.

Digital vs. analogue working time documentation

Advantages of digital systems

Modern digital time-tracking systems offer significant advantages over paper or Excel:

  • Automatic timestamping – no retrospective estimates
  • Tamper-evident logging – changes are documented
  • Automatic break monitoring – reminders when breaks are missed
  • Centralised storage – retrievable at any time, cannot be lost
  • Instant reporting – overtime and balances in real time
  • GDPR-compliant archiving – secure servers in Austria/Germany
  • Export function – data for payroll or authorities
  • Mobile-ready – recording possible from anywhere

Disadvantages of analogue systems

Paper and Excel have structural weaknesses:

  • ❌ Susceptible to retrospective manipulation
  • ❌ No automatic plausibility check
  • ❌ High manual administrative effort
  • ❌ Error-prone during transfer and calculation
  • ❌ Difficult for mobile or home-office employees
  • ❌ No automatic backup function

What is checked during authority inspections

During inspections by the labour inspectorate, social insurance authorities, or other bodies, particular attention is paid to the following points:

  • Completeness: Are records available for all employees and all working days?
  • Accuracy: Do the documented times correspond to reality?
  • Break rules: Were the legally prescribed minimum breaks observed?
  • Maximum working hours: Were the maximum daily and weekly working hours exceeded?
  • Rest periods: Were the minimum rest periods between working days observed?
  • Sunday and public holiday work: Were exceptions correctly documented and justified?

Practical tip: Prepare for potential inspections by spot-checking your own records. Simulate how quickly you could produce all time records for the past three months for a specific employee. With digital systems this takes seconds – with paper it can take hours.

Checklist: Is your working time documentation legally compliant?

Review your current system against these points:

  • Are the start and end of every work shift documented?
  • Are breaks recorded (start, end, duration)?
  • Is recording done promptly (not retrospectively at month end)?
  • Is the documentation objective and reliable (not estimated)?
  • Are records centrally and securely archived?
  • Can you produce records immediately during an inspection?
  • Are records retained for at least 3 years?
  • Are retrospective changes logged?
  • Is there a review and approval process?
  • Does the system also work for mobile employees?

If you are uncertain about more than two points or have to answer "No", you should revise your system.

Conclusion: Working time documentation is more than a compliance exercise

Working time documentation is often perceived as a tiresome obligation – yet it is the foundation for fair employee protection, correct remuneration, and transparent business management.

Establishing a legally compliant system not only protects against administrative fines and legal disputes, but also provides valuable insights into personnel costs, project hours, and productivity.

Modern digital solutions make documentation easier than ever before: employees record their hours in seconds, managers have an overview at all times, and the payroll department receives clean, exportable data. Administrative effort decreases, data quality improves – and the legal requirements are met automatically.