With the rising cost of living, many employees in Spain are seeking ways to supplement their income. When pay raises are not feasible, taking on a second job, commonly referred to as “double jobbing” is becoming increasingly popular. For employers, this trend raises important questions about legality, employee welfare, Social Security, and tax implications.
Is Holding Two Jobs Legal in Spain?
In general, Spanish labour law permits employees to hold more than one job. However, several important limitations apply:
- Exclusivity Clauses: A valid employment contract may prohibit secondary employment if it includes a specific exclusivity clause that is properly compensated.
- Conflict of Interest: Second jobs that compete with or conflict with the interests of the primary employer may be prohibited.
- Working Time Limits: Employees cannot exceed the legal maximum working hours set by Spanish labour law (typically 40 hours per week, averaged over a year).
- Public Sector Employment: Public sector employees face stricter regulations and often require prior authorization for any secondary work.
Occupational Risk and Employer Liability
Under Spain’s Prevención de Riesgos Laborales legislation, employers are legally required to prevent avoidable risks, including those linked to overwork or fatigue.
If an employee working multiple jobs suffers an accident caused by exhaustion, Social Security authorities or labour inspectors may investigate whether the employer fulfilled its duty of care.
Can Employers Dismiss Employees for Having a Second Job?
Yes, but only under certain circumstances. Dismissal must be proportionate and legally justified. Common grounds include:
- Violation of a Non-Compete Clause: If the second job involves working for a competitor, this could justify dismissal for breach of contract and loss of trust.
Social Security Implications
When employees work more than one job, each employer has independent obligations to the Spanish Social Security system:
1. Separate Employer Contributions
- Each employer must register the employee and pay contributions based on their respective salaries.
- The employee will appear under multiple alta (registrations) in the system.
- Contributions are subject to an annual maximum base, updated each year.
2. Impact on Social Security Benefits
Working two jobs can affect how certain benefits are calculated:
- Sick Leave (Incapacidad Temporal): If the employee becomes unfit to work, the benefit amount may reflect the total of their contributions. However, coverage could vary depending on whether the employee is unable to work in both jobs or only one.
- Unemployment Benefits (Prestación por Desempleo): An employee who loses only one of their jobs may not qualify for unemployment benefits unless they are fully unemployed and meet the minimum contribution requirements.
- Pension Contributions: Multiple jobs can lead to higher total contributions, which may slightly enhance pension calculations up to the maximum pensionable base.
Tax Considerations:
Taxation becomes more complex when an employee has two jobs in Spain. Each employer withholds IRPF (personal income tax) independently, often without accounting for the employee’s combined income. Also, employees might face a substantial tax bill when filing their annual tax return. To avoid unexpected tax liabilities, employees should regularly update their personal and income details by submitting Modelo 145, ensuring that income tax withholdings are calculated correctly. Alternatively, employees may opt for higher voluntary withholdings to prevent potential underpayments at year-end.
Best Practices for Employers
- Review Employment Contracts: Ensure clauses related to exclusivity, conflicts of interest, and working hours are clearly defined and compliant with the law.
- Monitor Employee Well-being: Implement safeguards to avoid risks related to overwork or fatigue, especially if aware of dual employment.
- Communicate Transparently: Encourage employees to disclose secondary employment if required contractually and assess risks or potential conflicts collaboratively.
Conclusion
Holding two jobs is legal in Spain, but it comes with important legal, tax, and welfare considerations for both employees and employers. By understanding these nuances and addressing them proactively, employers can maintain a fair, compliant, and productive workplace while supporting employees seeking additional income.



