LUXEMBOURG Law and Practice Contributed by: Romain Tiffon and Marie Bentley, ATOZ Tax Advisers
• LuxCo contractually assuming risks that it does not control; • inadequate documentation of risk‑management procedures; and • incoherence between legal agreements and actual behaviour. Such mismatches can drive TP adjustments or chal - lenge the entire transaction framework. Failure to meet these expectations may lead to re‑characterisation of debt as equity, adjustments or denial of deductions. While Luxembourg historically did not impose manda - tory contemporaneous documentation, the framework is tightening significantly: • the forthcoming Master File/Local File obligations (via a draft Grand‑Ducal Regulation) target Luxem - bourg entities of MNE groups; and • even without these expected new rules, companies must maintain TP documentation and provide it to the tax authorities upon request (“on‑demand documentation”). 4.5 Challenges to Related-Party Limited Risk Distribution Arrangements In practice, Luxembourg does not single out lim - ited‑risk distribution arrangements for systematic challenge, but such arrangements can be reviewed and adjusted when they fail to comply with the arm’s length principle as embedded in Articles 56 and 56bis of the LITL. 4.6 Local Transfer Pricing Rules and OECD Standards From a Luxembourg perspective, the core transfer pricing framework is fully aligned with OECD princi - ples, but several important nuances exist in how these rules are embedded in domestic law and enforced in practice. Luxembourg does not have an integrated transfer pricing statute. Instead, TP rules result from a combination of domestic tax provisions. Although OECD aligned, Luxembourg has locally developed expectations, particularly in the context of intra-group financing. The tax authorities issued Circular LIR 56/1–56bis/1, establishing substance, equity at risk and remuneration requirements. These
expectations go beyond OECD Guidelines by provid - ing Luxembourg-specific safe harbour style condi - tions for financing activities. Luxembourg plans to implement Master File/Local File rules consistent with OECD’s Action 13. However, the thresholds differ significantly: • Master File – standalone entity must have ≥ EUR100 million turnover or ≥ EUR400 million bal - ance sheet total; and • Local File – required for entities belonging to MNE groups under country-by-country reporting (CbCR) rules. These thresholds differ from other OECD countries (eg, the Netherlands and Belgium use EUR50 million). 4.7 Transfer Pricing Disputes and Mutual Agreement Procedures Luxembourg traditionally had a very light audit envi - ronment. Historically, tax audits were uncommon, and taxpayers often relied on advance rulings for certainty rather than detailed transfer pricing documentation. However, this has changed materially. • Creation of a dedicated tax audit division – The establishment of a new audit division means that tax audits now occur more systematically, and transfer pricing has become a routine area of review. • Stronger enforcement focus on TP documenta - tion – Transfer pricing documentation is now the primary compliance and risk‑mitigation tool. The authorities increasingly challenge TP positions when documentation is missing, inconsistent or insufficient. • Increased monitoring and enforcement – With the new rules, updated circulars, and reporting obliga - tions for intra‑group transactions, the Luxembourg tax authorities place greater emphasis on TP than ever before. Companies face more questions, deeper audits and higher expectations for robust economic analyses. Luxembourg is not “aggressive” in a hostile sense, but it has clearly moved from a low‑audit environment to
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