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Published on 20 January 2026, CSSF Circular 26/905 introduces a major shift in how Less Significant Institutions (LSIs) in Luxembourg must organise, govern, and operationalise their approach to environmental, social and governance (ESG) risks. Yet despite its significance, the circular has so far received surprisingly little attention, an oversight that could leave institutions unprepared for a complex regulatory transition. This article highlights what the circular requires, why it matters, and why institutions should act now.

On 17 February 2026, the EU Council published the updated list of non-cooperative jurisdictions for tax purposes (“Blacklist”), adding two new countries (Turks and Caicos Islands and Viet Nam) and removing three countries from the list (Fiji, Samoa and Trinidad and Tobago). It is now composed of 10 jurisdictions, with the next revision due in October 2026.

Grant Thornton Luxembourg February Data Protection Newsletter - On 23 February, 61 data protection authorities across the globe issued a Joint Statement on AI-Generated Imagery and the Protection of Privacy (the “Joint Statement”). Signatories include the European Data Protection Board (EDPB) and the European Data Protection Supervisor (EDPS), as well as national authorities from France, Germany, Belgium, Spain, Italy, and Switzerland.

Social parameters and other new features - What changes on 1 January 2026. Learn more on the new pension reform of 19 December 2025, the management of electronic certificate of incapacity for work, simplified procedure for profit-sharing bonuses, tax relief in case of sharing child benefit in cases of shared custody and more...

Specific social security obligations apply to non-resident employees who perform all or part of their professional activity outside Luxembourg. To ensure optimal management of these formalities, our dedicated team is available to assist you at every step of the process. We will support you in fulfilling your administrative obligations, ensuring that all procedures are carried out in full compliance with the relevant authorities.

Taxpayers are required to make quarterly advance payments for Corporate Income Tax (CIT), Municipal Business Tax (MBT) and Net Wealth Tax (NWT).

Grant Thornton Luxembourg welcomes you to the January Data Protection Newsletter! As we begin 2026, we continue to share clear and practical insights on the latest developments in data protection, AI, and tech regulation, helping you stay informed and compliant in this ever-changing digital landscape.

Pillar 2 brings in a 15% minimum tax and new reporting obligations for large groups. In Luxembourg, entities with a calendar year-end must file for the 2024 financial year by 30 June 2026.

As the 7 June 2026 deadline for transposing the EU Pay Transparency Directive (EUPTD) into national law approaches, some organisations may consider deferring action until national implementing measures are finalised. The European Commission has, however, dispelled any speculation about possible delays: no extension will be granted, and Member States are expected to meet the deadline. For employers in Luxembourg, the implication is clear - early and proactive preparation is not merely advisable; it is imperative.

Take control of your tax obligations and discover new opportunities. Thanks to our innovative tool, adapt your Tax Calendar 2026 to your needs and meet your tax deadlines efficiently with Grant Thornton Luxembourg.

Grant Thornton Luxembourg welcomes you to the December Data Protection Newsletter! This month, we highlight key developments in data protection, AI, and tech regulation, including the EDPB’s new Recommendations on eCommerce accounts, the EU Fundamental Right Agency (FRA) report on high-risk AI systems, the adoption of an AI ethics resolution by international Francophone data protection authorities, and CNIL fines for unlawful cookie practices.

AI is transforming the asset and wealth management industry, moving into investment decisions, compliance checks, and client engagement. This shift raises expectations for speed, accuracy, and personalisation. Learn more about the results of this new global AI research led by ThoughtLab.

Grant Thornton Luxembourg welcomes you to the November Data Protection Newsletter! This month, we highlight key developments in data protection, AI, and tech regulation, including updates on the European Commission GDPR and AI Act amendment proposal, a potential new GDPR adequacy decision, and important news for LinkedIn users regarding AI training. Whether you are managing compliance or simply aiming to stay safer and better informed online, this newsletter is for you. As always, our Data Protection Team is here to help. If you would like tailored advice or to discuss a specific issue, please contact us using the details at the end of this page.

Grant Thornton Luxembourg welcomes you to the October Data Protection Newsletter! Following the launch of our first issue in September, we continue our mission to provide you with a clear and practical overview of the latest developments in data protection, AI, and tech regulation, helping you stay informed and compliant in this ever-changing digital landscape. Whether you are a business navigating your compliance obligations or simply a citizen wanting to make your online life safer and more informed, this newsletter is for you. For more tailored advice or support, do not hesitate to reach out to our Data Protection Team using the details provided at the bottom of this page. We’ll be delighted to arrange an introductory meeting tailored to your needs.

2024 Income tax returns: The forms are now online.

Grant Thornton Luxembourg welcomes you to the first edition of its Data Protection Newsletter! Each month, we will bring you a clear and accessible overview of key developments in data protection, AI, and tech regulation helping you stay ahead in an ever-evolving digital landscape. Whether you are a business navigating your compliance obligations or simply a citizen wanting to make your online life safer and more informed, this newsletter is for you. For more tailored advice or support, do not hesitate to reach out to our Data Protection Team.