If you need expert advice on the posting of workers to Spain, contact Fernanda Vargas via WhatsApp or book an appointment through Calendly to receive personalized guidance.
1. What is a transnational posting of workers (and what it is not)
A transnational posting of workers refers to the temporary transfer of employees by companies established in one country to another, in this case Spain, for the purpose of providing services. It is important to differentiate this from a permanent transfer. The posting is temporary and carried out within the framework of a service provision contract, whereas a permanent transfer implies settling in a new country. Law 45/1999, which transposes Directive 96/71/EC, ensures that the worker’s rights and working conditions are protected in Spain from the moment of their arrival.
2. Who is covered by Law 45/1999: Companies from the EU, EEA, and third countries
Law 45/1999 applies to companies established in any EU member state or a country that is a signatory to the European Economic Area Agreement, which send workers temporarily to Spain. The law also extends its guarantees to companies from third countries, ensuring that the posting workers are not treated less favorably than their counterparts from EU countries. This comprehensive scope helps maintain fair competition and ensures that workers’ rights are safeguarded regardless of their country of origin.
3. What changed with Royal Decree-Law 7/2021: From “minimum wage” to full remuneration
The Royal Decree-Law 7/2021 brought significant reforms to the regulations governing posted workers. Previously, guarantees were limited to ensuring a minimum wage; however, the focus has shifted toward providing the complete remuneration as laid down in the applicable legislation and collective agreements. This means that from day one, posted workers must receive the same wages and benefits as if they were working under local Spanish conditions, under the principle of equal pay for the same work.
4. Ensured working conditions from the very first day
One of the core obligations placed on companies posting workers is to guarantee that Spanish labor conditions are met from the start. This includes adherence to working time regulations, proper remuneration, measures ensuring non-discrimination, child labor protections, workplace safety, and maternity protection. Even if the original contract stipulates conditions that are more favorable to the worker, Spanish legal minimums will always be upheld, ensuring that every worker is fully protected.
5. Advance notification of the posting: deadlines, content, and the eight-day exemption
Before any posting takes effect, companies are required to submit an advance notification. According to Article 5 of Law 45/1999, postings lasting less than eight days are generally exempt from this requirement, except in the case of temporary employment agencies where the notification is mandatory. The notification must include essential details such as the identity of the sending and receiving companies, the personal and professional details of the workers, the start date and expected duration of the posting, as well as contact information of a designated liaison in Spain.
6. The Single Portal Ley45 (RECD45): how the notification is now submitted
Since early 2025, the Ministry of Labor and Social Economy, in collaboration with the Regional Labor Authorities, has launched the Single Portal Ley45 (RECD45). This centralized electronic system streamlines the communication process by compiling all notifications in one place and allowing companies to check the status of submissions at any time. This innovation not only simplifies administration but also ensures timely and accurate communications regarding worker postings.
7. Representative in Spain and the documentation that must be available
The regulation mandates that companies designate a representative in Spain to liaise with the labor authorities. This representative must be fully identifiable and accessible to resolve any issues that arise. Additionally, companies must keep a series of documents on hand in Spain, including employment contracts or equivalent documents, pay slips, time records showing the start and finish of every workday, and, if applicable, work permits for nationals from third countries. Ensuring that all documents are properly translated if necessary further facilitates compliance checks by the Labor Inspectorate.
8. Long-term postings: the 12- and 18-month rule
When a posting extends beyond 12 months, additional Spanish labor conditions must be applied to the worker. Should the company wish to extend the posting period to 18 months, a motivated notification must be submitted to the labor authorities before the 12-month period expires. This requirement is designed to ensure that long-term postings continue to offer appropriate worker protections throughout the entirety of the assignment.
9. A1 vs. Law 45/1999: Why they are not the same and do not substitute each other
The A1 certificate, issued in accordance with Regulations (EC) 883/2004 and 987/2009, confirms the applicable Social Security legislation during a worker’s posting. However, it does not replace the obligations under Law 45/1999, such as advance notifications and compliance with Spanish working conditions. Both instruments operate in parallel, and it is crucial for companies to manage both appropriately to avoid legal pitfalls.
10. Construction and subcontracting: REA and chain of responsibility
In the construction sector, there are additional responsibilities regarding postings. Companies involved in construction and subcontracting must register in the Accredited Companies Register (REA) to ensure that all part of the subcontracting chain complies with legal requirements. This measure is vital for maintaining transparency and accountability, thus preventing irregularities and ensuring that all subcontracted workers receive the legal protections they deserve.
11. Infractions and sanctions: What the Labor Inspectorate monitors and the costs involved
The failure to comply with posting-related obligations can result in significant fines. Under Law 45/1999 and as amended by Royal Decree Legislative 5/2000 (further modified by Law 10/2021), sanctions range from minor fines of 70 euros up to very serious infractions amounting to 225,018 euros. Common areas of non-compliance include late or omitted notifications, inaccurate information, and failure to designate a responsible contact in Spain. The Labor Inspectorate rigorously monitors these criteria, reinforcing the need for meticulous adherence to the law.
12. Rights of the posted worker and how to claim them
Posted workers are entitled to a set of rights designed to ensure fair treatment while working in Spain. These rights include receiving the same working conditions as local employees and the ability to file complaints in situations of discrimination, unequal pay, or unsafe conditions. It is important for workers to be aware of these rights and to seek professional legal advice if they believe their rights are being compromised by their employer.
13. What’s on the horizon: The European Digital Posting Declaration Portal
On June 23, 2026, a provisional agreement was reached between the European Council and the European Parliament to introduce a digital portal for posting declarations. This innovative portal will offer a multilingual public interface, a standardized common form, the capacity for document uploads, and technical data validation. Although adoption is still pending formal ratification, this portal is expected to streamline and standardize digital communications between authorities and service providers across Europe, complementing existing national systems such as the Ley45 portal in Spain.
14. Compliance checklist before sending your workforce to Spain
Before posting workers to Spain, companies should ensure they have completed a comprehensive compliance checklist that includes the following points:
– Confirming the applicability of Law 45/1999 and the reforms introduced by Royal Decree-Law 7/2021.
– Verifying that all Spanish labor conditions are guaranteed from the first day.
– Ensuring the advance notification is submitted within the required deadlines (noting the eight-day exemption, except for temporary employment agencies).
– Enrolling in the REA for companies operating in the construction sector.
– Appointing a representative in Spain and maintaining all necessary documentation such as contracts, pay slips, and work schedules.
– Obtaining and correctly using the A1 certificate, while understanding that it does not substitute for compliance with Law 45/1999.
– Being aware of the potential fines and sanctions for non-compliance.
This checklist will help ensure that companies are fully compliant before relocating their workforce to Spain, reducing legal risks and protecting the rights of posted workers.
If you have any questions or need further advice, do not hesitate to contact Fernanda Vargas via WhatsApp or schedule an appointment through Calendly.