For European Union (EU) expatriates in Spain, managing Spanish taxes can be a complex task.
However, since October 2, 2024, the Spanish Tax Agency has implemented a new system that simplifies the process: eIDAS authentication (Electronic Identification, Authentication and Trust Services).
A new era at the Tax Agency: implementation of eIDAS
The eIDAS regulation (Electronic Identification, Authentication and Trust Services) is an EU-wide framework that establishes standards for secure electronic identification and trust services in cross-border digital transactions.
This system allows EU citizens to use their national digital ID (e.g., a digital identity card) to access public services in other member states — including Spain’s tax administration — securely and efficiently. It represents a major step toward digital integration across the European Union.
Benefits for EU expatriates
Thanks to eIDAS, EU citizens can now access a wide range of Spanish tax procedures using their national electronic identification — significantly simplifying administrative processes and reducing the need for physical documentation or in-person visits.
Start date and access to the eIDAS system
The eIDAS authentication system became operational on October 2, 2024. EU citizens can now securely access the Electronic Headquarters of the Tax Agency to:
- File income tax returns (IRPF / IRNR)
- Manage VAT obligations
- Complete customs formalities
- View tax statements and make payments
Authentication is performed using your national digital ID card — issued by your home country — as long as it is compliant with the eIDAS regulation.
Regulatory framework and operation of eIDAS
Currently, to access Spanish tax services via eIDAS, you must first hold a valid Spanish tax identifier. These include:
- DNI: National Identity Document (for Spanish nationals)
- NIE: Foreigner Identification Number (for non-EU and EU residents)
- NIF L: Tax Identification Number for Spaniards living abroad without a DNI
- NIF M: Tax Identification Number for foreigners without an NIE
This means that while you authenticate using your home country’s digital ID, you still need one of these Spanish identifiers to link your identity to the Spanish tax system.
In the future, the Spanish Tax Agency plans to expand eIDAS integration so that EU citizens can access services directly using only their national eID — without needing a prior Spanish identifier. This will greatly simplify cross-border tax compliance and strengthen EU digital cooperation.
Requirements for authentication in Spain
To interact with Spanish public administrations via eIDAS, you must have:
- A valid Spanish tax identifier (DNI, NIE, NIF L, or NIF M), OR
- If you don’t yet have one, you can request a NIF at a Spanish consulate in your home country — this will serve as your official Spanish tax identifier.
When you authenticate via eIDAS, your home country’s system will securely transmit your name, surname, date of birth, and national identifier to the Spanish administration — ensuring trusted, encrypted identification without sharing sensitive personal data.
Procedures enabled with eIDAS
The eIDAS system supports a broad range of tax and administrative procedures, including:
- Income tax declarations: IRPF, IRNR, Corporate Tax
- VAT management: Filing returns, queries, and corrections
- Debt management: Viewing and paying outstanding tax liabilities
- Customs procedures: Import/export documentation
- Powers of attorney and consultations: Appointing representatives and accessing Informa+
- Claims and appeals: Submitting tax disputes or requesting reviews
To confirm whether a specific procedure supports eIDAS authentication, look for the eIDAS login option in the authentication menu of the Electronic Headquarters of the Tax Agency.
Our tax advisory services
eIDAS authentication marks a major leap forward in digital tax compliance for EU expatriates in Spain — offering speed, security, and convenience.
If you need help navigating your tax obligations, applying for a NIE or NIF, setting up eIDAS access, or filing your IRPF/IRNR returns, our team provides personalized, bilingual support to ensure full compliance and peace of mind.
For assistance with your tax procedures, contact us today.
