When selling a property in Luxembourg, one question almost always comes up: will I have to pay capital gains tax?
The answer is… it depends.
It all depends on the type of property, how long you have owned it and how it has been used. That is why, at Albalux Crédit, we believe it is essential to understand the rules before putting a property on the market. Careful planning can sometimes save you several thousand euros.
In this article, we explain in simple terms how property capital gains work in Luxembourg, the different scenarios that may apply, how the gain is calculated and a few tips to help optimise your tax position while fully complying with Luxembourg tax legislation.
What is a property capital gain?
Let's start with a very simple example.
Imagine you buy an apartment for €500,000.
A few years later, you sell it for €650,000.
You might think that your capital gain is €150,000.
In reality, the calculation is often a little more complex. The acquisition price can be adjusted to take account of certain purchase costs and qualifying investments, which may reduce the taxable capital gain.
How is a capital gain calculated?
In its simplest form, the calculation is as follows:
Capital Gain = Selling Price – Adjusted Acquisition Price
The acquisition price may be increased by certain purchase-related costs or by works that permanently increase the value of the property, in accordance with the applicable tax rules. In some situations, the law also allows for a revaluation of the acquisition price.
Let's look at an example.
- Purchase price: €450,000
- Eligible costs and improvements: €30,000
- Adjusted acquisition price: €480,000
- Selling price: €600,000
The capital gain is therefore:
€600,000 – €480,000 = €120,000
This is the amount that forms the basis for calculating any tax due, where applicable.
The main capital gains situations in Luxembourg
This is generally the most tax-efficient situation.
Under Article 102bis of the Luxembourg Income Tax Law (LIR), the capital gain realised on the sale of your main residence is, in principle, exempt from income tax, regardless of how long you have owned the property, provided that the legal conditions are met. In particular, the property must be your main residence at the time of the sale or meet the specific conditions laid down for cases where you have moved.
This is excellent news for families wishing to sell their home in order to purchase a larger property, relocate for professional reasons or simply enjoy a different living environment.
Where the property is not your main residence and is sold after a relatively short period of ownership, the capital gain may be treated as a speculative gain.
Under the current general tax regime, this applies to properties sold less than five years after acquisition (although temporary rules have applied during certain periods). The gain is then taxed at the progressive rates of Luxembourg income tax, which may reach the highest applicable marginal rate.
In other words, the higher your income, the higher the tax you may have to pay.
When a property has been owned for more than five years, the capital gain is treated as a disposal gain.
This regime benefits from more favourable taxation than speculative gains. In addition, a ten-year tax allowance of €50,000 (€100,000 for certain jointly taxed married couples) may apply, subject to the relevant conditions and taking into account any allowances already used during the previous ten years.
Property inherited through succession is not taxed at the time of inheritance, as inheritance is regarded as a transfer without consideration.
However, if the heir later sells the property, the sale may generate a taxable capital gain under Articles 99bis (speculative gain) or 99ter (disposal gain) of the Luxembourg Income Tax Law (LIR), depending on how long the property has been held.
To calculate the capital gain, the tax authorities generally use the property's tax value at the date of inheritance, to which certain eligible costs may be added and, where applicable, any revaluation permitted under Luxembourg tax legislation. As every inheritance is different, the taxable amount can vary significantly.
At Albalux Crédit, we always recommend obtaining a personalised tax calculation before putting an inherited property on the market. Proper planning often helps avoid unpleasant surprises when it comes to filing your tax return.
Building land is subject to the same taxation principles as a house or apartment when it forms part of the seller's private assets. Its sale may therefore give rise to taxable property capital gains under Articles 99bis and 99ter of the Luxembourg Income Tax Law (LIR), depending on whether the land is sold within five years of acquisition or after that period.
The capital gain is calculated as the difference between the selling price and the acquisition price (which may be revalued using the applicable tax coefficients in the case of a disposal gain).
Many owners assume that only residential properties are affected by these rules, but undeveloped building land is also subject to this tax regime.
Please note: Luxembourg legislation provides for certain exceptions. For example, the sale of building land to the State or to a municipality under specific housing policy schemes may qualify for an exemption from capital gains tax.
Can you reduce the amount of tax?
The good news is yes, in certain situations.
For example:
- keeping the property long enough may allow you to benefit from the tax regime applicable to disposal gains;
- the ten-year allowance may reduce the taxable portion of the capital gain where applicable;
- certain expenses and investments may be included when calculating the adjusted acquisition price.
Every situation is different. A sale planned several months in advance can sometimes be significantly more tax-efficient than one arranged at short notice.
Why is planning important?
Imagine two neighbours.
They own exactly the same apartment.
The first decides to sell immediately.
The second waits a few months in order to meet the conditions required to benefit from a more favourable tax regime.
The result?
The second neighbour may save a substantial amount of money simply because they took the time to plan ahead.
That is precisely why property taxation should never be considered only after a buyer has already been found.
The most common mistakes
Here are some of the mistakes we encounter most frequently:
- assuming that every capital gain is automatically taxable;
- forgetting that a main residence benefits from a tax exemption in many cases;
- failing to keep supporting documents for renovation or improvement works;
- selling without calculating the potential capital gain beforehand;
- overlooking available tax allowances or applicable tax rules.
A few hours of preparation can sometimes represent savings of several thousand euros.
Key points to remember
Property capital gains in Luxembourg do not follow a single rule.
Everything depends on factors such as:
- the type of property;
- how long you have owned it;
- how it has been used (main residence or investment property);
- the eligible costs and improvements that may be taken into account;
- any applicable tax allowances.
At Albalux Crédit, we understand that buying or selling a property is an important decision. Understanding Luxembourg's property tax rules helps avoid unpleasant surprises and enables you to make informed decisions with greater confidence.
If you are planning a property transaction, always take the time to assess the tax implications before signing a preliminary sales agreement or the final deed of sale.
What happens if you still have an outstanding mortgage?
A common situation is selling a property while the mortgage has not yet been fully repaid. In this case, the proceeds from the sale are generally used first to repay the outstanding balance owed to the bank. If the selling price exceeds the remaining mortgage balance and any selling costs, the seller keeps the difference.
For example, imagine you purchase a house for €500,000 using a mortgage. A few years later, you sell it for €700,000, while €250,000 remains outstanding on the loan. At the time of the sale, the €250,000 is repaid to the lender and you receive the remaining balance.
However, this has no impact on the calculation of the capital gain, which is always based on the difference between the selling price and the adjusted acquisition price, in accordance with Luxembourg tax legislation.
If you then decide to buy a new main residence, even if it is less expensive than the one you have just sold, you may use the remaining capital as a deposit for your new purchase or choose to repay your previous mortgage in full before taking out a new loan.
Unlike some countries, Luxembourg does not provide for an automatic deferral of capital gains taxation simply because the proceeds of the sale are reinvested in another main residence.
However, if the property sold was your main residence and the conditions laid down in Article 102bis of the Luxembourg Income Tax Law (LIR) are met, the capital gain is generally exempt from taxation, regardless of the purchase price of your future home.
It is therefore important to distinguish between the tax rules governing capital gains and the financing arrangements for your new property project.
Official sources
For the latest information or to verify your personal situation, we recommend consulting the official resources:
- Guichet.lu – Declaring the sale or exchange of real estate: https://guichet.public.lu/fr/citoyens/fiscalite/immobilier/impots-taxes-plus-value/declaration-vent…
- Luxembourg Direct Tax Administration (Administration des contributions directes) – Property capital gains: https://impotsdirects.public.lu/fr/az/t/transf_plusvalue.html
