Social Security Agreement (SSA)

In brief for employers

A social security agreement coordinates between countries which social security system applies when a person works across borders. For employers, it is especially relevant when employees work outside the usual A1 context or are assigned to countries with specific bilateral or multilateral rules.

Definition

Social security agreements coordinate social security obligations between states. They can help avoid double contributions and clarify whether employees remain covered by the previous system during work abroad or become subject to the system in the country of work.

The agreement is the legal framework. A Certificate of Coverage is one possible form of evidence in certain agreement cases. The A1 certificate is the typical evidence in many European cases.

Typical checks

• Is there a social security agreement with the destination country?
• Which group of persons and activity is covered?
• How long does the assignment or work pattern last?
• Does the employee remain covered by the home system?
• Which certificate or evidence is required?
• Are payroll, HR and document storage aligned?

Difference from A1 and Certificate of Coverage

A social security agreement is the legal basis. A1 and Certificate of Coverage are forms of evidence used in different legal contexts. The operational process belongs to social security compliance.

How Vamoz helps with social security agreements

Vamoz A1 Forms helps HR identify social-security-relevant cases early, collect data in a structured way and document evidence centrally for HR, Payroll and Compliance.

Certificate of Coverage and A1 certificate

A Certificate of Coverage is social security evidence that can be relevant in certain bilateral treaty cases outside the classic European A1 process. The A1 certificate is the concrete evidence in many European cases. Both topics belong to social security compliance.