Casatax is a Geneva reduction in registration duties for the purchase of a main residence. 2026 scales: up to CHF 20'924 in reduction if the property price does not exceed CHF 1'394'928, plus the costs related to the mortgage note cut by half. Conditions: be a natural person, occupy the home within two years of purchase, and keep it as your main residence for at least three years. The amounts are indexed every year in March.