Luxembourg’s Article 50ter regime can exempt 80% of a qualifying fraction of net income from eligible intellectual property. The fraction depends on the nexus ratio, which links the relief to the taxpayer’s eligible research and development expenditure. A Luxembourg company owning a patent or selling a software subscription does not automatically exempt 80% of its revenue.
Development performed by the company, acquired rights subsequently improved by the company and research outsourced within a group affect different parts of the eligibility and nexus analysis.
Software copyright and qualifying development are separate tests
Article 50ter includes inventions protected by patents and the other specifically listed rights, as well as software protected by copyright. The list also includes utility models and certain supplementary protection certificates. Marketing-related intellectual property is excluded, including trademarks.
The eligible asset must have been created, developed or improved after 31 December 2007 through the research and development activities contemplated by the provision. The taxpayer itself must have carried on substantive research and development connected with that creation, development or improvement. Work carried out only by the seller of the asset or another group company does not satisfy this condition. Copyright protection alone does not establish qualifying research and development, and a development team does not establish that all technology expenditure relates to eligible assets.
The circular of the Luxembourg direct tax administration (ACD) explains the software and development conditions. The distinction matters for a business that combines original software, routine implementation, a brand and customer relationships. Those items are not treated as one eligible asset simply because they appear in the same product offering.
The rights held by the company also need evidence. Employee arrangements, contractor agreements and acquisitions determine what was created and what rights were transferred. Project records and source-code history can help explain the development work. A commercial description of the product cannot replace the legal and technical history.
For an acquired asset, continuing development or improvement by the taxpayer must create demonstrable added value. Acquisition alone does not establish those conditions or create eligible expenditure for the nexus numerator.
A subscription price can contain several kinds of income
Eligible income includes consideration for using an eligible asset or granting its use, gains from selling the asset, and qualifying judicial or arbitration compensation. Income directly linked to the asset can also be embedded in the sale price of a product or service.
For a software business, this last category is often central. A subscription may combine access to software with hosting, implementation, support or training. The part directly generated by the eligible intellectual property must be separated from the other income using the arm’s-length principles referenced by Article 50ter. The principle asks what independent parties would agree in comparable circumstances.
A contract headed “licence” does not establish that every amount billed is eligible income. The functions performed and what the customer receives support the allocation. The same issue arises where a patented component is sold inside a finished product with other sources of value.
Intragroup royalties require a consistent analysis of ownership, functions, risks and remuneration. The regime does not replace transfer pricing requirements. The company’s actual role should also be consistent with its Luxembourg substance, rather than established solely through the name on a licence agreement.
The 80% rate applies after expenses and historic adjustments
The calculation starts with eligible income and deducts the expenses required by the provision to reach eligible net income. Article 50ter then requires adjustments for the asset’s development history and uncompensated earlier negative income. A loss from developing the asset before commercialisation is relevant even if no licence income existed at that time.
Capitalising development costs in the accounts does not remove this history. The law has separate adjustment mechanics for costs deducted as incurred and costs capitalised and depreciated. Tax relief cannot be calculated simply by applying 80% to an accounting royalty margin.
Article 50ter(3) requires offsets between eligible assets that each generate eligible income where one has an adjusted negative result and another a positive result. Specific rules also cover uncompensated negative results of assets that have ceased generating eligible income. The amount reached after these steps is the adjusted and offset eligible net income. Only then is the nexus ratio applied.
A profitable established product alongside an already commercialised product with eligible income but an adjusted net loss requires assessment of both histories and the required offsets.
Development expenditure determines the nexus ratio
The numerator contains eligible research and development expenditure directly connected with the asset. It includes qualifying work performed by the taxpayer and qualifying research outsourced to unrelated entities. Amounts paid through a related entity can qualify where that entity passes the remuneration without a margin to an unrelated provider and the conditions are met.
Expenditure through a permanent establishment in another state of the European Economic Area (EEA) has additional conditions, including treaty attribution to the taxpayer, continued operation when eligible income is earned and absence of a similar IP regime in that state. The establishment’s existence and country must also be reported in the annual income tax return.
The denominator includes eligible expenditure, acquisition costs and relevant research and development expenditure paid to related enterprises. Buying an existing patent or software asset therefore increases total expenditure without creating eligible numerator expenditure merely through the purchase.
Related-party development must be distinguished from genuine pass-through payments to independent researchers. An invoice from a group service company does not establish either treatment on its own. The intragroup services analysis explains why the work actually supplied and its pricing need evidence.
The eligible numerator expenditure can be increased by up to 30%, capped at total expenditure. The ratio cannot exceed 100%. This uplift affects the ratio and does not create an additional tax deduction.
Interest, financing costs, property costs and costs lacking the required direct connection are excluded from eligible expenditure. The nexus calculation uses cumulative expenditure in the current and previous financial years when incurred, irrespective of its accounting or tax treatment. The net balance-sheet value of the software is therefore not a substitute for the expenditure schedule.
General or speculative research and development, and research that did not directly create an eligible asset, can still be counted under a specific exception. The taxpayer must establish a link to a particular eligible asset or justify a proportional allocation between eligible assets, with records supporting both the allocation and the amounts.
A numerical example separates the ratio from the exemption
Assume a hypothetical software asset meets all eligibility and documentation conditions. Cumulative eligible research expenditure is EUR 480,000. Acquisition costs are EUR 200,000 and development actually performed by a related enterprise costs EUR 120,000. The related enterprise does not pass these amounts to an independent provider.
| Calculation | Amount or result |
|---|---|
| Eligible R&D expenditure | EUR 480,000 |
| Acquisition costs | EUR 200,000 |
| Related-party development | EUR 120,000 |
| Total expenditure | EUR 800,000 |
| Eligible expenditure after the 30% uplift | EUR 624,000 |
| Nexus ratio | 78% |
If the adjusted and offset eligible net income is EUR 250,000, the exemption is EUR 156,000, calculated as EUR 250,000 × 78% × 80%. The remaining EUR 94,000 is not exempt under Article 50ter. It is not the tax due, which follows the company’s wider tax calculation.
Applying the ratio to revenue before the assumed income adjustments and offsets would overstate the relief.
Tracking begins before the first commercial licence
Article 50ter makes tracking eligible expenditure, total expenditure and eligible income for each asset a condition of the exemption. The company must retain supporting documents that establish the connection. Project identifiers, time records, invoices, contracts and the distinction between related and unrelated suppliers can form part of that evidence.
An unresolved legal interpretation concerning a planned operation may justify an advance tax ruling request. The request does not replace the tracking required by Article 50ter.
Grouping by product, service or family is allowed only within the statutory conditions where research complexity makes individual asset tracking impracticable. The grouping must be supported by objective and verifiable information and applied consistently. A single company-wide ratio cannot be adopted merely because it is easier to prepare.
For rights requiring registration, relief can begin at the application date. Withdrawal or refusal of the application requires the earlier exempt amounts to be included in the result for the year of withdrawal or notification of refusal. Pending protection therefore needs monitoring alongside the financial calculation.
Moving existing IP into Luxembourg does not erase the past
Article 50ter also addresses a change of taxing jurisdiction into Luxembourg. Earlier uncompensated negative income is reconstructed as though no transfer had occurred. Where the asset is valued at going-concern value on arrival, the positive difference over its remaining cost is also treated as negative income for this adjustment. That history must be reconciled with the opening values established for the company’s migration.
Certain tax-neutral reorganisations likewise preserve the income history under Article 50ter(5). Moving an established product into a Luxembourg company consequently does not establish a fresh exemption calculation based only on spending after arrival.
The annual tax file connects development expenditure with income allocation, adjusted net income and the nexus ratio. That record explains the actual relief and establishes the company’s role beyond holding rights or collecting royalties.
Tax advice on intellectual property
To examine eligible rights, development expenditure and the annual income calculation.
Explore tax advisoryFrequently Asked Questions
Does Article 50ter exempt 80% of a software company’s turnover?
No. The exemption applies to the eligible net income after the required adjustments and offsets, multiplied by the nexus ratio. Revenue from hosting, support and other services is not automatically income from eligible software rights.
Can trademarks benefit from the Luxembourg IP regime?
No. Marketing-related intellectual property is excluded. Eligible patents and copyright-protected software must also meet the development, income and documentation conditions.
Does buying a patent create a 100% nexus ratio?
No. Acquisition costs enter total expenditure, while eligible R&D expenditure forms the numerator. Purchase alone does not meet the development condition or create eligible numerator expenditure. The taxpayer’s own subsequent development or improvement must create demonstrable added value and be tracked with the asset’s history.
