Spain ICT Social Security: Which System Applies and What HR Must Prepare

One of the most common compliance gaps HR teams hit when transferring employees to Spain under an ICT permit is the social security question. Which system applies? Who contributes? What documents does the host entity need before the application goes in?

The answer depends on whether a bilateral agreement exists between Spain and the sending country — and since a 2024 practice change, getting it wrong means months of delay or an outright rejection.

The Core Rule: Treaty or No Treaty

Spain social security obligations for intra-company transferees split into two scenarios based on whether the sending country has a bilateral social security agreement with Spain.

Scenario Comparison: Treaty vs. No Treaty

Spain has bilateral agreements with over 30 countries, including the United States, United Kingdom, Australia, Canada, Japan, South Korea, India, and most of Latin America. The Spanish Ministry of Inclusion, Social Security and Migration publishes the current list. For EU-based senders, EU Regulation 883/2004 governs automatically.

The 2024 Practice Change HR Teams Cannot Afford to Miss

Before 2024, Spanish immigration authorities allowed companies to submit a letter confirming that the employee would be registered for Spanish social security while the Certificate of Coverage (COC) was still being processed in the home country.That is no longer accepted.

Now, employees coming from countries that have a social security agreement with Spain must submit the actual Certificate of Coverage together with the ICT application. If the COC is not ready, the ICT application cannot move forward.

This is important because getting a COC can take anywhere from a few weeks to several months, depending on the country. If HR or payroll teams wait until the immigration paperwork is being prepared, the transfer process may be delayed.

The best approach is to request the COC as soon as the employee transfer is approved, instead of waiting until the application documents are being collected.

What HR Must Prepare By Scenario

If the Sending Country Has a Bilateral Agreement with Spain

If No Bilateral Agreement Exists

Payroll During the Transfer: What the Spanish Host Entity Owes

During the ICT assignment, the employee employment contract and payroll must remain with the sending home country company. The Spanish host entity does not become the employer of record under the ICT framework. The salary is paid by the home country entity, not the Spanish company.

However, the employee must meet Spain minimum salary threshold approximately 40,077 euros gross annually in 2025  and the Spanish host entity must have documentation proving that salary is being paid.

For treaty countries, the home country entity continues handling all social security contributions. The Spanish host entity does not separately withhold Spanish contributions. For non-treaty countries, the host entity is responsible for Spanish social security registration and contributions, even though payroll originates abroad  which requires careful coordination between HR and payroll teams in both jurisdictions.

The EU and EEA Case: A1 Certificate Instead of COC

Employees transferred from an EU, EEA, or Swiss sending entity follow a different document path. EU Regulation 883/2004 governs social security coordination across member states. Instead of a Certificate of Coverage, the relevant document is an A1 Certificate, issued by the home country competent social security authority.

The A1 Certificate confirms which country legislation applies and must be recognized by Spanish authorities automatically under EU law. No additional Spanish registration is required when a valid A1 Certificate is in place. Processing typically takes 2 to 4 weeks for standard cases in most EU countries.

Common HR Mistakes and How to Avoid Them

Waiting too long to request the COC

The Certificate of Coverage (COC) must be ready before the ICT application is submitted.

For employees transferring from the US, the process can take at least 4 to 8 weeks. In some countries, it may take 3 to 6 months. Starting late can delay the entire transfer.

Assuming a treaty means no paperwork

A social security agreement with Spain helps employees avoid paying into the Spanish system, but documents are still required. HR teams must submit the COC or A1 certificate in advance.

If these documents are missing, Spanish authorities may treat the case as if no agreement exists, which can lead to unexpected registration and contribution costs in Spain.

Registering the employee in both countries

Some companies register employees in Spain “just in case,” even when a valid treaty applies. This can lead to duplicate social security contributions in two countries at the same time.

If the employee has a valid COC or A1 certificate, they should generally remain covered only under the home country system.

Overlooking the Spanish entity’s own compliance

The Spanish host company must also meet its own social security obligations before sponsoring an ICT permit. The company must be properly registered with the Spanish Social Security Treasury and up to date on its obligations.

If these requirements are not met, the ICT application can be rejected. See the most common Spain ICT rejection reasons for more on this.

Practical Timeline for HR Teams

Recommended Social Security Preparation Timeline

If your organisation is managing multiple ICT transfers, the social security step is the one most likely to compress your onboarding timeline. It should be treated as a parallel workstream to the permit application not a downstream task.

Jobbatical manages the end-to-end Spain ICT process, including social security classification, Certificate of Coverage coordination, and Day 1 compliance for host entities. Book a demo to see how we support HR teams with complex intra-company transfers.

For more on how permit type affects employer obligations, see the EU ICT vs. National ICT permit comparison and the complete Spain ICT employer guide.

Disclaimer: Immigration rules change quite frequently; please verify with official sources or contact us for the latest info before making any decisions.