What proof or documentation is required for income from the European institution?

To validate your situation with the tax authorities, it is sufficient to provide a certificate/attestation from your employer or the HR department of the European institution.

This certificate should confirm:

• that you were indeed employed by the European institution;
• the exact period during which you held this position.

This allows the authorities to recognise your status as a European employee without including this income in your Luxembourg tax return.

Updated on: 20/01/2026