Published on and written by Cyril Jarnias
Buying a chalet in Valais, an apartment in Geneva, or keeping your family home on the French side while working in Lausanne: for many French people, the Franco-Swiss border has become a mere line on the map… but certainly not for the tax authorities. Between local taxes, capital gains taxation, and the rules of the Franco-Swiss tax treaty, even a simple real estate transaction can trigger cascading effects in both countries.
Before buying, renting, or selling a property between France and Switzerland, it is crucial to understand the tax rules of both countries, whether you are a French resident with a property in Switzerland, a Swiss resident owning property in France, or a cross-border worker. The system, though complex, is based on stable principles that need to be known.
The key principle: real estate is taxed where it is located
In real estate matters, the Franco-Swiss tax treaty adopts a simple but fundamental principle: income and capital gains from a property are primarily taxed in the country where the property is physically located.
For a French person investing in Switzerland, rental income and capital gains are taxed in Switzerland. For a Swiss person owning a property in France, they remain subject to French rules (capital gains, rental taxation, IFI).
The tax treaty signed on September 9, 1966 and subsequently amended does not create additional tax; it simply allocates taxing rights between the two states to prevent the same capital gain or income from being taxed twice. This is where tax credits and exemption with progression methods come into play, particularly on the Swiss side.
How real estate taxation works in Switzerland
Switzerland does not have a unified system: it is the 26 cantons, and often the municipalities, that set most of the rules and rates. Three tax layers coexist – Confederation, canton, municipality – but real estate taxation largely relies on the cantonal and municipal levels.
A French investor must consider several aspects: purchase taxes, annual taxation (income and wealth), taxation upon resale, and domestic law constraints (Lex Koller, non-resident status, etc.).
Purchase taxes: transfer duties and ancillary costs
Most cantons levy a real estate transfer tax, due upon change of ownership. Its rate varies greatly from one canton to another: some, like Zurich, do not levy it, while others can exceed 3% of the property’s value.
In addition, the buyer bears notary fees and land registry fees, as well as, where applicable, costs related to setting up the mortgage. The combination of these charges typically amounts to around 3% of the purchase price in many cantons.
These elements can be summarized in an indicative table:
| Cost item | Basis of calculation | Typical range in Switzerland | Key remarks |
|---|---|---|---|
| Transfer tax | Sale price / tax value | 0% to approx. 3.3% | 0% in Zurich, up to 3.3% in canton of Vaud |
| Land registry fees | Property value or mortgage amount | approx. 0.1% to 0.3% | Mandatory for land registration |
| Notary fees | Sale price | approx. 0.1% to 1% | Very low in Zurich, higher in Geneva or Vaud |
| Mortgage fees | Loan amount | approx. 0.1% to 0.3% | Registration of the mortgage lien |
For a French non-resident, these costs add to any authorization fees under Lex Koller when authorization is required.
Annual taxation: wealth tax, property tax, and imputed rental value
Three major taxes apply to real estate ownership in Switzerland: wealth tax, annual property tax (only in some cantons), and, until its planned abolition, the imputed rental value (known as “valeur locative” or Eigenmietwert).
The private wealth tax rate in Switzerland is generally below 1%.
Many cantons add a specific tax on the land itself, the Liegenschaftssteuer, calculated as a percentage of the official value of the property. Typical rates range from 0.02% to 0.3%, with great cantonal diversity: Zurich, Schwyz, Zug, and Solothurn do not levy it, while Geneva, Vaud, Valais, and Ticino do.
The imputed rental value constitutes a third pillar: as long as the reform approved by Swiss voters has not entered into force, an owner-occupier is taxed on a “fictional rent”, an estimate of what the property could yield if rented. This amount is added to taxable income, after deducting mortgage interest and certain maintenance costs. It is generally calculated based on a tax value representing about 60% to 80% of the market value, and corresponds to 60% to 70% of the market rent.
An overview of annual taxes helps situate the tax “burden”:
| Type of tax | Taxable base | Order of magnitude | Specifics for a French owner |
|---|---|---|---|
| Wealth tax | Net value of assets (including real estate) | approx. 0.1% to 0.5% depending on canton and bracket | Mortgage debts fully deductible |
| Annual property tax | Tax or official value of the property | 0% to approx. 0.3% | Absent in about half of cantons |
| Imputed rental value (before reform) | Theoretical rent of owner-occupied property | Taxed as income at progressive rates | Eventually to be repealed and replaced by other adjustments |
For a French non-resident who only owns a property in Switzerland, this taxation is limited to that Swiss asset: this is known as “limited tax liability.” Conversely, a French person who becomes a Swiss tax resident must declare all their assets, including their house in France, which will count for determining rates but not for the taxable base when the property is abroad.
Rental income: taxed at the Swiss rate, but limited to Switzerland
When a French person rents out their apartment in Switzerland, the rents are taxed in Switzerland, in the canton where the property is located, like any real estate income. In principle, the administration allows deductions for expenses related to the property: maintenance costs, management fees, insurance premiums, and loan interest. The tax rate depends on the cantonal and municipal scale, to which the direct federal tax (up to 11.5%) is added, so that the total pressure on real estate income can approach 40% to 50% for very high incomes.
For non-residents, some cantons levy a withholding tax on rents, generally between 10% and 15% of gross rent. This amount is a prepayment towards the final tax. The French owner must file a limited tax return for this property to recalculate the actual tax, adjust, and, if necessary, obtain a partial refund.
Under the logic of the Franco-Swiss tax treaty, these rents, because they come from a property located in Switzerland, are taxable in Switzerland. They must nevertheless be reported in France if the owner remains a French resident, not to be re-taxed but to calculate an average tax rate, the so-called “effective rate.”
Real estate capital gains in Switzerland: a cantonal affair
Switzerland has no specific federal tax on real estate capital gains for individuals, but almost all cantons levy a tax on property gains upon resale of a property held as private assets.
The principle is common: the tax applies to the profit realized, i.e., the difference between the sale price and the “investment costs.” These include the acquisition price, purchase costs (notary, transfer duties, agency commissions), as well as expenditures that enhance the property’s value (extension, major renovation, additional garage, insulation, etc.). The “value-enhancing” nature of the work is crucial: routine repairs are often excluded.
Most cantons apply a very heavy tax on quick resales, considered speculative, then sharply reduce the rate over time, sometimes to a near-symbolic level after 25 or 30 years.
Some numerical examples illustrate this diversity:
| Canton | Rate logic on private capital gains | Effect of holding period |
|---|---|---|
| Zurich | Progressive rates from 10% to 40% depending on gain, exemption for first 5,000 CHF | Reduction of 5% after 5 years, 8% at 6 years, 11% at 7 years, up to 50% reduction after 20 years |
| Vaud | Rate approx. 30% for holding < 1 year, decreasing to approx. 7% after 24 years | Strong discouragement of quick resales |
| Geneva | Rate approx. 50% if resale within 2 years, dropping to 10% around 25 years and 0% beyond | Very strong incentive for long-term holding |
| Valais | Rate from 12% to 24% depending on gain, reduction of 4% per year from the 6th year | More lenient taxation for long holdings |
| Aargau | Rate of 40% in the 1st year, gradually decreasing to 5% in the 25th year | Very penalizing for quick resales |
In some cantons, when the capital gain is very small (a few thousand francs), the tax is simply waived. In Lucerne, for example, an exemption threshold of around 13,000 francs exists.
For a French person selling a property in Switzerland, the capital gains tax is due in the canton where the property is located. The Franco-Swiss treaty provides that France, as the country of residence, must recognize this taxing right. The gain generally must be taken into account in France to calculate the average rate, but France will grant a tax credit equal to the Swiss tax, thus avoiding economic double taxation.
Deferrals, rollovers, and special cases
Several cantons provide for tax deferrals, for example in the event of inheritance, gift, land consolidation, or “reinvestment” of the proceeds into a new principal residence. The idea is not to tax immediately when the taxpayer does not actually realize the sale proceeds, or when they reinvest entirely in a similar home.
In some cantons, it is possible to defer the tax provided that, within a set period (often two years), a new property of the same nature and use is purchased that the taxpayer will occupy themselves. The tax then becomes due only upon a later sale without reinvestment.
For non-residents, an often overlooked point deserves mention: if the seller has left Switzerland without leaving an address or sufficient guarantee, the canton can pursue the buyer and seize the property. This is why it is common to include in the deed that the seller deposits an amount equivalent to the capital gains tax or that the buyer obtains a contractual guarantee for the actual payment of the tax.
French taxation when owning or selling real estate from Switzerland
For a Swiss resident who owns property in France – a family home, second home, or rental apartment – France retains control over capital gains and wealth taxation. Switzerland, for its part, mainly applies the exemption with progression method: the French property will not be taxed in Switzerland, but will influence the rate applicable to income and wealth taxable in Switzerland.
Real estate capital gains in France: scale, allowances, and exemptions
The French regime for private capital gains on real estate is based on a flat income tax rate of 19%, to which social security contributions of 17.2% are generally added. The total burden thus reaches 36.2% for a French resident selling a property that does not benefit from any exemption.
The calculation begins with determining the gross capital gain, the difference between the sale price (reduced by selling costs such as agency commission) and the acquisition price increased by purchase costs (either actual or flat-rate) and qualifying improvement works. On this basis, allowances for holding period apply, separately for income tax and social contributions.
The allowance for income tax follows a rapid trajectory: 6% per year between the 6th and 21st year of holding, then 4% for the 22nd year. After 22 years, the capital gain is fully exempt from income tax. For social contributions, the allowance is slower: 1.65% per year between the 6th and 21st year, 1.6% in the 22nd year, then 9% per year from the 23rd to the 30th year. After 30 years, the capital gain is also fully exempt from social contributions.
In addition, a progressive surtax of 2% to 6% applies to net capital gains exceeding €50,000, per seller.
A summary table helps visualize these parameters:
| Element | Applicable French rule |
|---|---|
| Income tax rate | 19% on net taxable capital gain |
| Social contributions | 17.2% (CSG, CRDS, solidarity levy) |
| Basic total rate | 36.2% (excluding surtax) |
| Income tax allowance | 6%/year from 6th to 21st year, 4% in 22nd year (full exemption at 22 years) |
| Social contributions allowance | 1.65%/year from 6th to 21st, 1.6% in 22nd, 9%/year from 23rd to 30th (full exemption at 30 years) |
| “Large gains” surtax | 2% to 6% on net capital gain over €50,000 per seller |
For a Swiss resident selling a property located in France, these rules apply in full. The Franco-Swiss treaty clearly gives France the exclusive right to tax the real estate capital gain on a French property. Switzerland merely records the information for rate purposes, without re-taxing the gain.
Exemption for the principal residence: a major advantage
The sale of a principal residence located in France is fully exempt from capital gains tax, with no condition of holding period or amount ceiling. This exemption applies equally to a French resident or a cross-border worker domiciled in France who works in Switzerland: it is the nature of the property (actual principal residence on the day of sale) that matters, not the status of cross-border worker.
To benefit from the exemption, the home must be the owner’s habitual and actual residence at the time of the notarial deed. No condition of occupancy duration, capital gain amount, or income is required. A proposal to impose a minimum holding period of five years was not adopted, so the exemption remains total and unconditional in 2026.
For a Swiss person who lived in France and then moved abroad, a specific regime sometimes allows an exemption on the former principal residence, provided it is neither rented nor made available after departure and the sale occurs within a limited period following the change of domicile. Other targeted provisions exist for expatriates, within a certain amount of capital gain, subject to nationality and prior residence in France conditions.
Non-residents who sell a property in France remain subject to the 19% income tax rate. Regarding social contributions, the situation has significantly improved for individuals covered by a social security system of a European Economic Area state or Switzerland.
Since January 1, 2019, a Swiss resident proving affiliation with AVS/AI or LAMal is no longer subject to CSG/CRDS on their real estate capital gain in France, but only to a solidarity levy of 7.5% (capped at €150,000 of net taxable capital gain). Without Swiss certification, the notary applies 17.2%, with the possibility of filing a claim for a refund within the legal deadlines.
For a Swiss resident affiliated with Swiss social security, this results in a theoretical overall rate of 26.5% on the net taxable capital gain (19% + 7.5%), still subject to allowances for holding period.
Tax treaty and mechanisms for eliminating double taxation
Even though the tax on the French capital gain is withheld at source at the time of signing (via form 2048-IMM and the calculation performed by the notary), the Franco-Swiss treaty provides that the country of residence retains a declaratory right over this gain, with the granting of a tax credit.
For a Swiss resident selling a property in France, the gain is thus reported in the Swiss tax return for information purposes. Under Swiss practice, this gain will generally be excluded from the taxable base, but taken into account in calculating the rate applicable to other income or wealth (the so-called exemption with progression method). Switzerland acknowledges the tax paid in France and refrains from taxing the same gain a second time.
Conversely, for a French resident selling an apartment in Geneva, it is the Swiss canton that taxes the capital gain. France, for its part, includes this gain in determining the average rate applied to other income, but grants a tax credit equal to the theoretical French tax, so that the effective burden remains Swiss.
The tax treaty does not modify French domestic rules. Thus, the sale of a principal residence in France by a French resident remains fully exempt, even if that person receives Swiss income. This exempt capital gain is not reintegrated in Switzerland.
IFI: when real estate wealth crosses the border
Since the transformation of the ISF into the IFI, France has focused its wealth tax solely on real estate held directly or indirectly, including through companies with a real estate predominance. Tax households whose net real estate assets exceed €1.3 million as of January 1 are subject to this tax, according to a progressive scale ranging from 0.5% to 1.5%.
A French resident must declare all their worldwide real estate assets, including a chalet in Valais or an apartment in Lausanne, for IFI purposes. The fact that they are already taken into account for Swiss wealth tax does not exclude them from French taxation. The tax treaty operates here through a mechanism of tax credit or partial exemption to prevent the same asset from being fully taxed twice, but it does not exclude the Swiss asset from the IFI base.
For a Swiss resident, the rule is reversed: only real estate located in France falls within the scope of French IFI, provided that, together with other French assets of the household, it exceeds the threshold of €1.3 million. Swiss assets remain subject to cantonal and municipal wealth tax, which taxes all assets, movable and immovable, with widely varying modalities from one canton to another.
A comparative table helps visualize the contrast in philosophy:
| Comparative aspect | France (IFI) | Switzerland (wealth tax) |
|---|---|---|
| Tax base | Real estate only (direct or indirect) | All assets (accounts, securities, real estate, objects) |
| Entry threshold | €1.3M net real estate assets as of Jan. 1 | Cantonal thresholds often between 100,000 and 200,000 CHF |
| Rates | 0.5% to 1.5% | Typically 0.1% to 0.5% (progressive depending on canton) |
| Geographic scope | Worldwide for residents, France only for non-residents | Worldwide for residents, Swiss assets for non-residents |
| Treatment of debts | Deductible if related to taxable assets | Debts fully deductible, then allocated between countries |
For individuals who hold real estate through French civil property companies (SCI) or commercial companies, the Franco-Swiss treaty has introduced determinative clarifications: France can tax the value of the shares in proportion to the properties located on its territory, and Switzerland grants exemption only if the asset is actually taxed in France. Otherwise, Swiss authorities consider the shares as taxable movable assets for wealth tax purposes.
French cross-border workers, multiple residences, and telework: indirect effects on real estate
The cross-border worker who lives in France (for example, in the Pays de Gex or the Lake Geneva area) and works in Switzerland faces the constraints of both systems. Their salary is taxed in Switzerland according to the treaty rules, but France reintegrates this income in their annual tax return to calculate a global rate that will apply to their other French income, particularly rental income.
The so-called “effective rate” mechanism does not apply to real estate capital gains, which remain taxed at a proportional rate. A French cross-border worker selling their principal residence in France benefits from a full capital gains exemption, without their Swiss salaries aggravating the taxation on this gain.
Tax rule for cross-border workers
On the other hand, this cross-border worker remains subject to property tax, possible rental income, and, if their real estate wealth exceeds the threshold, to IFI, which will include both their French house and real estate assets located in Switzerland. Their Swiss salary, although exempt from French income tax thanks to a tax credit, inflates the tax rate on their French income, which can be decisive when they receive rents in France.
From 2026, new telework rules specify that as long as a certain percentage of days worked from France is not exceeded, salary taxation remains entirely in Switzerland. Beyond that, part of the taxation shifts to France, altering the income structure and the effective rate applied to French rental income.
Investing in Switzerland as a French person: key takeaways
For a French investor, the appeal of a Swiss real estate market often perceived as more stable and less volatile must be weighed against a cantonal tax mosaic and specific regulatory constraints, such as the Lex Koller.
At the time of purchase, the main difference from France lies in the absence of a uniform federal tax: transfer duties, property taxes, capital gains rules, and wealth tax vary greatly from one canton to another. The central Swiss cantons (Zug, Nidwalden, Lucerne, for example) stand out for generally lower tax pressure, while urban cantons like Geneva, Zurich, or Bern are more expensive.
During ownership, the French non-resident must pay property tax, imputed rental value, and cantonal wealth tax on their worldwide assets. If they remain a French tax resident, the Swiss property is declared in the French IFI, with a Franco-Swiss tax credit to reduce double taxation.
When it comes time to sell, the Swiss real estate capital gains tax – decided by the canton – becomes the key element. It can be heavy in case of a quick resale, but lightens considerably over the long term. At the same time, France will apply the treaty to avoid adding its own taxation on a capital gain that falls outside its jurisdiction, while possibly including it in determining an average rate for other income.
A French person living in Switzerland and investing in France can benefit from a full capital gains exemption on their principal residence if they sell it while still a French tax resident. If they become a non-resident before the sale, specific provisions apply subject to time limits and the property not being rented.
In the end, real estate taxation in Switzerland for French people, between local taxes, capital gains, and the tax treaty, rests on a few stable pillars: the state where the property is located taxes it first, the Franco-Swiss treaty avoids the most obvious double taxation, and each country retains its own logic for wealth, income, and capital gains.
The coexistence of the Swiss cantonal regime and the French general tax code complicates the management of multiple properties and statuses (resident, non-resident, cross-border worker). Any error in resale timing, lack of a Swiss social affiliation certificate, or failure to declare a foreign asset leads to extra costs, penalties, or double taxation.
Experience shows that the best strategy rarely involves aggressive optimization of regimes, but rather prudent anticipation of life events: choice of tax residence, timing of sales, level of debt, and coordination between French real estate wealth tax and Swiss wealth tax. The reward, for the taxpayer who takes the time to understand the logic of both systems, is the ability to enjoy their real estate assets on both sides of the border without leaving the largest share to the tax authorities.
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Cyril Jarnias is an independent expert in international wealth management with over 20 years of experience. As an expatriate himself, he is dedicated to helping individuals and business leaders build, protect, and pass on their wealth with complete peace of mind.
On his website, cyriljarnias.com, he shares his expertise on international real estate, offshore company formation, and expatriation.
Thanks to his expertise, he offers sound advice to optimize his clients' wealth management. Cyril Jarnias is also recognized for his appearances in many prestigious media outlets such as BFM Business, les Français de l’étranger, Le Figaro, Les Echos, and Mieux vivre votre argent, where he shares his knowledge and know-how in wealth management.
