What is Grundstückgewinnsteuer and how is it calculated on property sales in Switzerland?

Switzerland does not tax private securities gains, but profits from selling real estate are taxed at the cantonal level under the Grundstückgewinnsteuer (GKGST). The taxable gain is the sale price minus the original purchase price and any capital improvement costs (renovations, extensions) but not ordinary maintenance. Transaction costs such as notary fees and brokerage commissions are also deductible from the gain.

Most cantons apply a progressive rate that decreases the longer you have held the property. A sale after two years may trigger a surcharge above the base rate, while holding for 10, 20, or even 25 years can reduce the effective rate to a fraction of the base. The specific rate structure and holding-period discounts vary by canton: some cantons use a single cantonal rate, others add communal multipliers.

The tax is due in the canton where the property is located, regardless of where the seller is resident. If you reinvest the proceeds into a replacement primary residence within a set period (the deferral period varies by canton, often two years), you can defer the tax. Proceeds must be rolled into a new Swiss primary home, not a rental or holiday property. Estates that distribute a property to heirs generally trigger the tax only when heirs later sell, not at the time of inheritance.

This is general information only, not professional tax advice. Consult a qualified tax professional for your specific situation.