The tax result of a Luxembourg property sale starts with two facts. The first is whether the property belongs to private wealth or to a business. The second is the time between acquisition and sale.
This article concerns private real estate held by an individual. Property recorded in a business or professional activity follows different rules. The Luxembourg Inland Revenue’s current overview normally treats the date of the notarial deed as the sale date. If the deed makes the transfer subject to a condition, the year in which that condition is satisfied can become the relevant year.
The five-year holding test
A sale within five years after acquisition or construction normally produces a speculation gain under Article 99bis of the Income Tax Law. The net gain is added to taxable income and taxed at the ordinary progressive rate.
A sale more than five years after acquisition or construction normally produces a disposal gain under Article 99ter. This longer-held gain is calculated with an adjusted acquisition cost and benefits from the half-global-rate method. The official page states a maximum rate of 21%, before the employment-fund contribution.
| Time between acquisition and sale | Ordinary classification | Main rate method |
|---|---|---|
| Five years or less | Speculation gain | Progressive income-tax scale |
| More than five years | Disposal gain | Half of the taxpayer’s global rate |
The temporary two-year threshold and quarter-rate regime generally ended on 30 June 2025. A limited transition under the Law of 27 June 2025 covered deeds completed from 1 July through 30 September 2025 where the related sale agreement had been registered with the Registration Duties, Estates and VAT Authority by 30 June 2025. A sale completed in 2026 follows the ordinary five-year test.
Calculating the gain
The starting point is the sale price less costs directly connected with the disposal. This amount is compared with the acquisition cost. For a long-held property, the acquisition cost is adjusted using the coefficient shown in Form 700.
Acquisition and improvement expenditure must be supported by the facts of the file. The current Income Tax Law and Form 700 determine which amounts enter the calculation. An unsupported estimate can lead to a lower acquisition value being retained.
| Calculation step | Amount used |
|---|---|
| Sale consideration | Gross amount under the disposal |
| Less disposal costs | Costs directly linked to the sale |
| Less eligible acquisition cost | Adjusted where Article 99ter applies |
| Result | Gain before any available allowance |
The tax rate is applied after the correct classification and calculation. Quoting one percentage without the holding period and the taxpayer’s global rate can therefore be misleading.
The main-residence exemption
A gain on the owner’s main residence is exempt when the conditions in Article 102bis are met. The official main-residence guidance first covers a home occupied at sale or sold by 31 December of the year after moving out. In that case, one of three further connections must exist: occupation following acquisition or completion, occupation during at least the five years before sale, or a move for recognised family or professional reasons.
A later sale of an unoccupied former home faces a stricter cumulative test. The owner must have occupied it following acquisition or completion, must not have another home available, and must have left for family reasons or a professional move involving the owner, spouse or partner.
The exemption extends to the normal appurtenances of the building and the land on which it stands. A separate building plot or an unusually large parcel requires its own analysis rather than an automatic extension of the residential exemption.
The allowances for long-held gains
A disposal gain under Article 99ter can be reduced by a ten-year allowance. The amount is EUR 50,000 for one person and EUR 100,000 for spouses or partners taxed jointly. Allowances granted during the previous ten years reduce the balance available. The deduction cannot create a loss.
A separate one-off allowance of EUR 75,000 can apply when property was inherited in the direct line and had been used as the parents’ main residence. The inheritance, relationship and former use must all fit the statutory condition.
These allowances concern qualifying long-held disposal gains. They do not convert a short-held speculation gain into exempt income.
Inheritance and gifts
Inheritance and gifts do not themselves produce a taxable sale gain under these rules. A later sale remains capable of doing so. To determine the holding period, inherited or gifted property is treated as acquired at the time of the last acquisition for value.
The acquisition cost also follows the amount paid under that last transaction for value. This continuity rule can place a later sale in the long-held category even when the heir or recipient has only recently received the property.
Non-residents and property structures
A non-resident remains taxable in Luxembourg on a gain from Luxembourg real estate. Residence status can affect the wider income-tax calculation, but it does not remove Luxembourg’s right to tax the local property gain.
An SCI or a company changes the analysis. A transparent SCI may attribute the result to its members, while a SARL holding property follows corporate tax and accounting rules. The private-property exemptions should not be carried into an entity-level calculation without checking the legal and tax classification.
Reporting the sale
The official reporting procedure confirms that a private sale or exchange must be reported for the year of disposal. The individual tax forms page publishes Form 700, which records the property, dates, sale price, acquisition cost and applicable classification. Its result is carried to Form 100.
The main-residence section of Form 700 can also record the facts supporting the exemption. The form should follow the notarial deed and the actual history of occupation rather than a simplified label applied after the sale.
Conclusion
The five-year holding test separates speculation gains from longer-held disposal gains. The calculation, rate method and allowances then follow that classification. A main residence can be exempt, but the occupation and timing conditions must be established. Form 700 brings the relevant dates and amounts into one calculation for the tax return.
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Frequently Asked Questions
When is a Luxembourg property gain a speculation gain?
A sale of private real estate within five years after acquisition or construction is normally treated as a speculation gain. It is taxed at the ordinary progressive rate.
How is a property gain taxed after five years?
A sale more than five years after acquisition or construction is normally a disposal gain. The adjusted acquisition cost is used and the taxable gain benefits from the half-global-rate method, subject to the taxpayer's circumstances.
Is the sale of a main residence exempt?
The gain is exempt when the property meets the conditions for the owner's main residence. Occupation and timing must be checked, especially when the property is sold after the owner has moved.
What allowance applies to a long-held property gain?
The ten-year allowance is EUR 50,000 per person and EUR 100,000 for spouses or partners taxed jointly. Allowances used during the previous ten years reduce the amount still available.
Which form reports a private property sale?
A private sale or exchange must be reported for the year of disposal. Form 700 records the calculation and facts, and its result is carried to Form 100.
