Tax in Luxembourg

Who is the tax authority and where do filings live?

Luxembourg's Administration des Contributions Directes (ACD), under the Ministry of Finance, administers direct taxes; Administration de l'Enregistrement, des Domaines et de la TVA (AED) administers VAT, registration duties, and other indirect taxes [SC1]. Customs administered by Administration des Douanes et Accises. Filings flow through MyGuichet.lu for personal-tax e-services and dedicated portals for corporate filings. The credentialed Luxembourgish tax-and-accounting professions are CA Luxembourg regulated by the Institut des Reviseurs d'Entreprises (IRE) and the Ordre des Experts-Comptables. Substantive law: Income Tax Law (Loi modifiee du 4 decembre 1967 concernant l'impot sur le revenu, LIR), VAT Law, Tax Adaptation Law, Top-up Tax Law (Loi du 22 decembre 2023 transposant Directive 2022/2523), and successive amendments. Luxembourg has been a founding EU member since 1958 and applies the EU VAT Directive 2006/112/EC; euro since inception 1 January 1999; Schengen founding signatory.

What is the tax year and when are returns due?

The individual tax year is the calendar year. Personal income tax returns are due 31 December of the year following the tax year (extended from 31 March under successive reforms to provide longer filing window) [SC1]. Corporate fiscal years align with the calendar year (with limited exception); annual corporate returns are due 31 May of the year following fiscal year-end. VAT returns are filed monthly (above EUR 620,000 turnover) by the 19th of the following month, or quarterly. Annual financial statements are required for in-scope corporations.

Who is a Luxembourgish tax resident?

Under the LIR, an individual is tax resident in Luxembourg if (a) maintaining their domicile or habitual residence in Luxembourg, OR (b) being physically present in Luxembourg for at least 6 months (with limited exceptions) [SC2]. Residents are taxed on worldwide income; non-residents on Luxembourg-source income. Treaty tie-breakers apply.

What are the personal income tax rates?

The personal income tax brackets for 2024 cover 23 bands ranging from 0 percent up to 42 percent (top marginal). Brackets at category 1 (single): 0 percent up to EUR 12,438; progressive bands at 8/9/10/11/12/14/16/18/20/22/24/26/28/30/32/34/36/38/39/40/41/42 percent across narrowly-spaced thresholds [SC1]. Solidarity tax surcharge of 7 percent (or 9 percent for high-income) applies on the income tax payable. Personal allowances are tax-class-based (Class 1 single, Class 1a single-with-children, Class 2 married-jointly). Investment income (dividends from Luxembourg companies) face 15 percent withholding under specific provisions; 50 percent inclusion for partial-exemption framework. Mandatory social security contributions (CCSS) add 12.45 percent (employee-side) and approximately 12.45 percent (employer-side, plus accident insurance variable).

How does Luxembourg's corporate tax work?

The corporate income tax (Impot sur le revenu des collectivites, IRC) rate is 17 percent for fiscal years 2024 (raised from 15 percent for taxable income above EUR 200,000 under successive reforms; the rate is rising to 17 percent in 2025 under recent amendments aligning lower bracket structure) plus 7 percent solidarity surcharge on IRC plus municipal business tax (Impot commercial communal, ICC) at 6.75 percent (Luxembourg City) — combined ~24-25 percent [SC2]. Withholding tax on dividends to non-residents is 15 percent (treaty rates apply; 0 percent for EU/EEA participation under Parent-Subsidiary Directive). Pillar Two QDMTT and IIR apply for fiscal years from 31 December 2023 under the Top-up Tax Law transposing EU Directive 2022/2523 [SC3]; UTPR for fiscal years from 31 December 2024. Tax loss carryforwards: 17 years (under post-2017 reform; pre-2017 losses retained indefinite carryforward). Luxembourg's Net Wealth Tax (Impot sur la fortune) applies on companies at 0.5 percent on net wealth above EUR 500m and 0.05 percent above. IP-box regime (80-percent exemption on qualifying IP income) under Article 50ter LIR.

What about TVA (VAT)?

The standard VAT rate is 17 percent under the VAT Law — among the EU's lowest standard rates [SC4]. Reduced rates: 8 percent (basic foodstuffs, accommodation, books, certain pharmaceutical), 3 percent (super-reduced for specified categories including basic foodstuffs and certain other essentials), and 14 percent (intermediate rate for specified categories). Zero-rated supplies include exports. Registration threshold is EUR 35,000 annual turnover (raised under successive amendments). EU OSS/IOSS regimes apply.

How are cryptoassets taxed?

Luxembourg taxes individual cryptoasset disposal gains under the LIR with specific provisions: speculative gains (held under 6 months) are subject to ordinary progressive rates as 'speculative income'; long-term gains (held over 6 months) are generally tax-exempt for individual non-business holdings [SC2]. Mining and staking income are 'commercial income' or 'other income' depending on regularity. EU MiCA Regulation applies from 30 December 2024 with crypto-asset service providers supervised by the Commission de Surveillance du Secteur Financier (CSSF). Luxembourg has been progressive on cryptocurrency-fund licensing under specific UCITS/AIFMD framework adaptations.

What is the treaty network and what are the audit triggers?

Luxembourg has approximately 85 active double tax treaties [SC5]. EU directives apply alongside treaties. Luxembourg ratified the OECD MLI on 9 April 2019 with modifications entering force from 1 August 2019 onward. Audit triggers include disproportionate VAT credits, transfer-pricing non-compliance under Article 56 LIR (TPD/CbCR documentation), undeclared bank deposits flagged via DAC2/CRS (Luxembourg banking secrecy effectively eliminated through CRS adoption from 2017). Standard SOL is 5 years; 10 years for fraud.

What are the common penalties and pitfalls for foreigners?

The Luxembourgish penalty framework imposes administrative-fine sanctions for late filings, failure to file, incorrect declarations, and failure to maintain accounting records [SC5]. Default interest accrues at the prevailing rate plus statutory margin. Tax-evasion criminal exposure under specific provisions carries fines and imprisonment for grossly-significant evasion. Common foreign-national pitfalls: (1) the 23-bracket PIT framework with combined-effective marginal rates plus solidarity surcharge creates high-income exposure; (2) Pillar Two QDMTT and IIR effective 31 December 2023 caught in-scope MNE groups (Luxembourg's holdco position made the country a high-priority jurisdiction for Pillar Two analysis); (3) the IP-box regime 80-percent exemption under Article 50ter LIR has specific qualifying-IP-income classification; (4) Net Wealth Tax on corporate net wealth is layered atop IRC + ICC; (5) the tax-class framework (Class 1/1a/2) creates married-filing-status and dependant-allowance variations; (6) MiCA from 30 December 2024 introduced CASP-licensing changes; (7) MLI ratified 2019 introduces PPT and other anti-abuse rules; (8) the long-term cryptoasset-holding (>6 months) exemption for individual non-business is a notable feature; (9) EU member status brings full acquis-coordinated tax framework and Luxembourg's holdco-jurisdiction position requires careful BEPS-aligned structuring; (10) post-2017 17-year loss-carryforward limit replaced earlier indefinite framework — pre-2017 losses retain indefinite carryforward.