Understanding IBGI: Geneva Real Estate Capital Gains Tax (2026)

When a property owner decides to sell real estate in Geneva, understanding the taxation of capital gains is essential. The Impôt sur les bénéfices et gains immobiliers (IBGI) is the cantonal mechanism that taxes the profit realized upon the alienation of a property. As experts at OAKSWELL, we guide our clients through this tax, where the sliding scale based on the holding period serves as a key lever for financial planning.

What is the IBGI in Geneva?

The IBGI is a direct cantonal tax levied on the gain realized from the sale, exchange, or any economic transfer of real estate located in the canton of Geneva [4, 9]. Unlike standard income tax, it specifically targets real estate capital gains to regulate the market and curb speculation [6]. It applies regardless of the seller's domicile, whether they are a Swiss resident or a foreign national [5].

Calculating Taxable Profit

The profit subject to IBGI is the difference between the alienation value (sale price) and the acquisition value (initial purchase price) [10]. To determine the net gain, several items can be deducted from the sale price:

• Notary fees and transfer taxes paid during the initial acquisition [2].
• Brokerage commissions related to the sale [2, 10].
• Expenses related to value-enhancing works (investments that increased the property's value) [3, 9].

Sliding Scale and 2026 Tax Rates

The tax rate is strictly linked to the duration of ownership. The longer you hold the property, the lower the rate, which encourages stability in the Geneva real estate market [3, 5]. As of January 1, 2025, an important change was introduced: the minimum rate for a holding period of 25 years or more increased from 0% to 2% [4, 6, 10].

Here is the scale applicable as of October 4, 2026:

• Less than 2 years: 50 %
• 2 to 4 years: 40 %
• 4 to 6 years: 30 %
• 6 to 8 years: 20 %
• 8 to 10 years: 15 %
• 10 to 25 years: 10 %
• 25 years and more: 2 %

Numerical Example

Consider the sale of an apartment held for 12 years with a net gain (after deductions) of CHF 200,000. According to the scale, the applicable rate is 10 %. The tax due will therefore be CHF 20,000. If this same property had been held for 26 years, the tax would be CHF 4,000 (2 % of 200,000) [4].

Key Takeaways

IBGI is an unavoidable tax in Geneva that rewards long-term ownership. It is essential to keep all invoices for renovation work and proof of acquisition costs to reduce the taxable base. In the event of reinvestment in a primary residence, tax deferrals may be considered under strict conditions (Art. 85 LCP) [3].

Frequently Asked Questions

Does IBGI apply if I sell my primary residence?

Yes, IBGI applies to all real estate sales in Geneva, including primary residences, except in specific cases of tax deferral when reinvesting in a replacement home [3].

How is the tax collected during the sale?

Upon signing the authentic deed, a portion of the tax is generally held in escrow by the notary to guarantee payment to the cantonal tax authorities [9].

Are there differences between selling shares and selling property?

Yes, the sale of shares in a real estate company (share deal) may be treated differently by tax authorities, although the tax administration may reclassify the operation as a real estate sale if private holding conditions are met [2].

Sources

• [2] Grange Immobilier (2025): Vente d’immeuble à Genève: share deal vs. asset deal.
• [3] EstimerMaison.ch: Guide pratique et calculateur de l'IBGI.
• [4] RealAdvisor (2026): Impôt Suisse sur les Gains Immobiliers: guide complet 2026.
• [5] Privalia (2026): IBGI: l’impôt sur les bénéfices et gains immobiliers à Genève.
• [6] JSRE.ch (2025): Impôt sur les Bénéfices et Gains Immobiliers (IBGI) à Genève.
• [9] Comptoir Immobilier (2026): Simulez votre impôt sur la plus-value immobilière à Genève.
• [10] Esther-Lauber.ch: Impôts sur les bénéfices et gains immobiliers à Genève.