Right to Strike in Spain: RDL 17/1977, Limits, Essential Services and Unlawful Strikes (2026) : Lexiel

The Right to Strike in Spain

The right to strike is recognised in Article 28.2 of the Spanish Constitution (Constitución Española) as a fundamental right, subject to legal regulation that preserves its exercise and guarantees essential community services.

The governing legislation is the Real Decreto-Ley 17/1977, of 4 March, on Labour Relations (RDLRT), which was partially declared unconstitutional by Constitutional Court Judgment (Sentencia del Tribunal Constitucional, STC) 11/1981, with the portions compatible with the Constitution remaining in force.

Who Holds the Right to Strike

The right to strike may be exercised by:

Employees (trabajadores por cuenta ajena) (RDLRT and the Workers' Statute, Estatuto de los Trabajadores, ET)
Civil servants (funcionarios públicos) with limitations (Art. 28.2 of the Constitution in conjunction with the TREBEP, Texto Refundido del Estatuto Básico del Empleado Público, the Consolidated Text of the Basic Statute of Public Employees)
Economically dependent self-employed workers (trabajadores autónomos económicamente dependientes, TRADE), with restrictions

The following do not have the right to strike: members of the armed forces and state security forces and bodies (Art. 28.2 of the Constitution, in fine; Law 17/1999 for the armed forces; Organic Law 2/1986 for the Police).

Notice and Calling a Strike

Parties Entitled to Call a Strike (Art. 3 RDLRT)

Trade union organisations (organizaciones sindicales) with a presence within the scope of the strike

Workers through an agreement adopted at a general assembly by majority vote

Notice Requirements (Arts. 4 and 10 RDLRT)

Ordinary strike: 5 days' advance notice to the employer and the labour authority (autoridad laboral) before the start date
Strike in essential services (transport, healthcare, energy, telecommunications): 10 days' advance notice

The notice must specify: the objectives of the strike, steps taken to resolve the dispute, the start date, and the members of the strike committee.

Strike Committee (Comité de Huelga) (Art. 5 RDLRT)

The strike committee (máximum 12 members) is the representative body of striking workers. It must ensure the security and maintenance services of the company during the strike, it may not abandon the premises.

Effects of a Strike on the Employment Contract

During a strike:

The employment contract is suspended (not terminated): the worker does not work and the employer does not pay wages
The striking worker is placed in a special social security registration status (alta especial en la SS) with no obligation to make contributions on the part of either the employer or the worker (Art. 106.4 LGSS, Ley General de la Seguridad Social, General Social Security Act)
The employer may not replace striking workers through new hires or through temporary employment agencies (ETT, empresas de trabajo temporal) (Art. 6.5 RDLRT + Art. 8.b Law 14/1994 on Temporary Employment Agencies)
The employer may not dismiss striking workers during a lawful strike (any such dismissal is null and void: STC 11/1981 and established case law)

Minimum Services in Essential Services

When a strike affects essential community services (Art. 28.2 of the Constitution: transport, healthcare, postal services, energy, water, education), the Government may set the minimum services (servicios mínimos) required to guarantee the basic needs of the community.

Judicial review: STC 26/1981 established that the Government must provide reasons for setting minimum services and that these may be challenged before the administrative courts (jurisdicción contencioso-administrativa). Excessive minimum services that hollow out the right to strike are unconstitutional (STC 183/2006).

Unlawful and Abusive Strikes

Unlawful Strikes (Art. 11 RDLRT)

The following strikes are unlawful:

Those called for political reasons or for purposes unrelated to workers' professional interests
Solidarity strikes (huelgas de solidaridad) in support of workers at another company (unless the solidarity interest is direct)
Strikes aimed at altering a collective agreement (convenio colectivo) in force, except in cases of employer non-compliance
Those that fail to respect security and maintenance services

Abusive Strikes (Art. 7.2 RDLRT)

Strike modalities that seek to disrupt the regularity of the production process are considered abusive (rotating strikes, work-to-rule, staggered strikes, sit-down strikes) when they do not pursue legitimate labour objectives. Classification is decided on a case-by-case basis by the Labour Inspectorate (Inspección de Trabajo) or the employment courts (jurisdicción social).

Consequences of unlawfulness: participating workers may be sanctioned (including dismissal if the unlawfulness is serious), although the Constitutional Court requires proportionality between the infringement and the sanction.

Strike-Breaking and Vídeo Surveillance

External strike-breaking (esquirolaje externo), replacement by outside workers: prohibited (Art. 6.5 RDLRT)
Internal strike-breaking (esquirolaje interno), the employer directing non-striking workers to perform the work of striking workers: prohibited when used to break a strike (STC 123/1992)
Vídeo surveillance: the employer may record company premises during a strike to monitor compliance with minimum services, but may not do so to identify striking workers for disciplinary purposes (STC 196/2004)

Conclusion

The right to strike is a fundamental right in Spain with broad constitutional protection. The most significant limitations are the advance notice requirement, minimum services in essential services, and the prohibition on substitution. Labour lawyers (abogados laboralistas) must be familiar with these limits in order to advise both workers seeking to exercise the right and companies that need to manage industrial action.

Lexiel allows you to search Constitutional Court case law on strikes, minimum services, and strike-breaking, with verified citations.