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SAF-T in Luxembourg: Declaration, Requirements & Deadlines

What is SAF-T Reporting in Luxembourg?

The Standard Audit File for Tax (SAF-T) is an electronic format designed to facilitate the structured exchange of accounting and tax data between businesses and tax authorities. In Luxembourg, this standard is implemented as the Fichier Audit Informatisé de l’Administration de l’Enregistrement et des Domaines (FAIA). The FAIA serves as Luxembourg’s version of SAF-T, enhancing financial transparency, simplifying tax audits, and ensuring compliance with local accounting regulations. The SAF-T Luxembourg system supports the country’s shift to digital tax compliance.

When Was SAF-T Introduced in Luxembourg?

Luxembourg SAF-T reporting through the FAIA was introduced in January 2011. Since then, businesses subject to Luxembourg’s Standard Chart of Accounts have been required to maintain their financial records in an electronic format that complies with FAIA standards. The implementation of this requirement has helped standardize accounting practices and streamline tax audits under the Standart Audit File Tax in Luxembourg.

SAF-T Deadlines in Luxembourg

The FAIA file must be submitted upon request by the tax authorities, typically in preparation for a tax audit. There are no periodic or scheduled submissions required; however, businesses must ensure they can provide FAIA-compliant records when requested. Failure to comply with Standart Audit File Tax in Luxembourg requirements within the given timeframe may result in penalties or tax reassessments.

Is SAF-T Mandatory in Luxembourg?

Yes, SAF-T reporting through FAIA is mandatory for businesses operating under Luxembourg’s Standard Chart of Accounts. Any company that falls under this obligation must maintain accurate and structured digital accounting records to ensure compliance. Non-compliance with the SAF-T Luxembourg framework can lead to fines, potential tax investigations, or other administrative actions.

SAF-T Requirements in Luxembourg

The FAIA file must be structured according to specific tax regulations and must include detailed financial data. The key components of the FAIA file include:

  • Header Information: General details about the company and the reporting period.
  • Master Files: Data on general ledger accounts, customers, suppliers, and tax codes.
  • General Ledger Entries: A complete record of financial transactions.
  • Source Documents: Information on invoices, payments, and other relevant financial records.

All FAIA files must be submitted in XML format, ensuring compatibility with Luxembourg’s digital tax system. Companies must ensure that their accounting software is capable of generating FAIA-compliant reports to meet tax authority requirements.

SAF-T Declaration in Luxembourg

When tax authorities request an FAIA file, businesses must submit the report within the designated timeframe. Companies should conduct regular internal audits to ensure their accounting records are accurate, structured correctly, and ready for submission. By maintaining FAIA-compliant records at all times, businesses can ensure smooth tax audits and avoid penalties, as expected by the Standart Audit File Tax in Luxembourg.

What Companies Must Declare SAF-T in Luxembourg?

The FAIA requirement in Luxembourg applies to:

  • Businesses subject to the Luxembourg Standard Chart of Accounts.
  • Companies exceeding the financial reporting threshold of €112,000 per year.

  Non-resident entities with subsidiaries and branches established in Luxembourg.Businesses must ensure their accounting systems are SAF-T compliant to generate FAIA files efficiently when requested.


Luxembourg’s FAIA implementation ensures a structured and transparent approach to tax reporting and auditing. While there are no periodic submission deadlines, companies must maintain accurate digital accounting records and be prepared to submit FAIA files upon request. Ensuring that accounting software is FAIA-compatible will help businesses remain compliant and avoid any disruptions during tax audits. These practices support full alignment with the SAF-T Luxembourg initiative.


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