Property Gains Tax: How to Calculate Your Tax Burden When Selling

480 people search each month for "Grundstückgewinnsteuer" (property gains tax). Anyone selling a property in Switzerland must pay tax on the gain. How high this tax is depends on the canton, the ownership duration and the profit achieved.

What is property gains tax?

Property gains tax (Grundstückgewinnsteuer, GGSt) taxes the profit from the sale of a property. The gain is calculated as the difference between the sale price and the investment costs (purchase price + value-enhancing investments + ancillary purchase costs).

Property gain = sale price - purchase price - value-enhancing investments - ancillary purchase costs

Ownership duration: the most important factor

The longer you own the property, the less tax you pay. Most cantons grant a progressive ownership-duration discount:

• Under 2 years: surcharge of 20-50% (speculation surcharge)
• 2-5 years: full tax rate
• 5-10 years: discount of 5-15%
• 10-20 years: discount of 15-40%
• 20+ years: discount of 30-60% (varies greatly by canton)

Worked example

Purchase price 2010: CHF 1'200'000
Renovation 2018: CHF 150'000
Sale price 2026: CHF 1'800'000

Investment costs: CHF 1'350'000 + CHF 40'000 (ancillary purchase costs) = CHF 1'390'000
Property gain: CHF 1'800'000 - CHF 1'390'000 = CHF 410'000
Ownership duration: 16 years (discount approx. 30%)
Taxable gain: CHF 410'000 x 0.70 = CHF 287'000
Tax rate (cantonal, e.g. ZH): approx. 20% = CHF 57'400 in tax

Tax optimisation: 5 legal approaches

1. Hold for longer: the ownership-duration discount is the biggest lever. Owning for 5 more years can save 15-20% in tax.
2. Document value-enhancing investments: every renovation that increases the value (new kitchen, bathroom, heating system) reduces the taxable gain. Keep the receipts!
3. Replacement acquisition: if you buy an equivalent property within 2 years, the tax can be deferred.
4. Deduct ancillary purchase costs: broker's commission, notary fees and land registry charges are deductible.
5. Consult a tax adviser: for premium properties, professional advice can save thousands of francs.

General information, not tax advice. Note the cantonal differences. As of April 2026.