What is absenteeism from work?
Employee absenteeism is an operational category: it relates absences to scheduled working time. In Spain, there is no single legal definition that determines what every absenteeism index should include. Therefore, before comparing periods, centers, or companies, it is necessary to document the scope, units, and denominator (employees).
An absence may be due to temporary incapacity , a work accident, occupational disease , paid leave, family responsibilities, a strike, unjustified absence, or other causes. Each has its own regulations. The aggregated data may reveal a problem, but it does not, on its own, explain its origin nor prove a breach of contract by an individual.
Differences with related concepts
- Temporary incapacity: a situation covered by Social Security when a person is temporarily unable to work and receives healthcare under the provisions of Article 169 of the General Social Security Law. It is a possible cause of absence, not a synonym for absenteeism.
- Work accident and occupational disease: occupational contingencies (Spain) with their own definition and treatment; they can result in sick leave, but can also exist without prolonged absence.
- Unjustified absence: non-compliance not covered by a valid reason. It should not be confused with sick leave, a permit, or the exercise of a right.
- Presenteeism: being present at the workplace with reduced work capacity. It is not included in the absence rate, although it may indicate related health or organizational problems.
How is it measured?
There is no universal formula. A useful dashboard typically combines: percentage of time lost (included absence hours divided by theoretical hours), frequency (episodes multiplied by average number of people), and average duration (days or hours lost per episode). The number of people exposed and the period analyzed should also be shown.
The comparison is only valid if the same criteria are maintained: which absences are included, how part-time work schedules and calendars are treated, and whether calendar days, working days, or hours are counted. Segmentation by center, occupation, or type of contingency is advisable, but with groups large enough to preserve confidentiality. Eurostat distinguishes various reasons for temporary absence in its Labour Force Survey; this classification confirms that an absence does not automatically equate to illness or misconduct.
How is it analyzed from a prevention perspective?
Preventive analysis seeks modifiable patterns and causes, not culprits. It reviews temporal trends, tasks, shifts, ergonomic exposure, workload, autonomy, support, conflicts, accidents, and aggregated health surveillance results . The INSST identifies absenteeism among the possible organizational consequences of poor psychosocial exposure, but a statistical association does not prove causation.
An increase should be considered in light of staff changes, community outbreaks, seasonality, aging, reorganizations, and record-keeping quality. If work-related factors are identified, the risk assessment and prevention plan should be reviewed, with input from the workers.
How it is managed in practice
- Define the indicator and its exclusions in writing.
- Validate schedules, planned times, episodes, and causes without collecting unnecessary clinical data.
- Analyze aggregate trends and compare them with equivalent periods.
- Investigate working conditions when there are consistent signs.
- Prioritize collective measures: task redesign, staffing, shifts, ergonomics, support and psychosocial prevention.
- Implement a maintenance and return-to-work procedure, with adaptation when necessary.
- Evaluate results and correct the measures.
Management must coordinate human resources, prevention, worker representation and, where appropriate, health surveillance, keeping clinical information separate.
Practical example
At a logistics center, the percentage of lost work hours increased over four months. The breakdown shows that the change is concentrated in order picking and coincides with a new target system and increased shift rotation. The company does not automatically attribute the increase to abuse: it reviews ergonomic and psychosocial assessments, consults with staff, and compares accidents and sick leave in aggregate data.
Workloads, breaks, rotation sequences, and supervisory support are adjusted; in addition, a coordinated return to work is established after extended absences. Frequency, duration, and lost time are then compared with the same period, documenting changes in staffing and production.
Regulatory framework in Spain
The Workers’ Statute recognizes the works council’s right to be informed, at least quarterly, of statistics on absenteeism rates and their causes, along with accidents, occupational diseases, and workplace accident rates (Article 64.2.d). The General Social Security Law defines temporary incapacity, and Royal Decree 625/2014 regulates aspects of its management and control; these regulations do not automatically classify all absences as unjustified.
Law 31/1995 mandates the protection of occupational safety and health, risk assessment, and prevention planning (Articles 14 to 16). Article 22 protects the confidentiality of health surveillance: the company receives preventive recommendations, not individual diagnoses. Furthermore, Royal Decree-Law 4/2020 repealed the former dismissal for objective reasons due to absenteeism under Article 52.d of the Workers’ Statute. Employer actions must respect rights, collective bargaining, equality, data protection, and the circumstances of each absence.
