v3.25.4
Income taxes - Schedule of Tax Rate Reconciliation (Details) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Taxes [Abstract]      
Accounting profit SFr 205.2 SFr 279.6 SFr 69.1
Expected tax rate (in percentage) 19.60% 19.60% 19.70%
Expected tax expense SFr 40.2 SFr 54.8 SFr 13.6
Tax rate effect of income taxed at different tax rate (in percentage) (0.027) 0.005 (0.018)
Tax effect of income taxed at different tax rate SFr (5.6) SFr 1.4 SFr (1.3)
Tax rate effect of not deductible expense (in percentage) 5.90% 3.10% 10.30%
Tax effect of not deductible expenses SFr 12.2 SFr 8.8 SFr 7.1
Tax rate effect of non-taxable income and tax incentives (in percentage) (17.20%) (4.00%) (22.40%)
Tax effect of non-taxable income and tax incentives SFr (35.2) SFr (11.1) SFr (15.5)
Tax rate effect of (de)recognition of tax losses (in percentage) 0.00% (0.20%) (2.40%)
Tax effect of (de)recognition of tax losses SFr 0.0 SFr (0.6) SFr (1.7)
Tax rate effect from tax rate changes (in percentage) 0.30% (0.10%) 0.70%
Tax effect from tax rate changes SFr 0.7 SFr (0.2) SFr 0.5
Tax rate effect of prior year adjustments (in percentage) (5.80%) (0.90%) (20.50%)
Tax effect prior year adjustments SFr (11.9) SFr (2.6) SFr (14.2)
Other tax rate effects (in percentage) 0.50% (4.70%) 1.30%
Other tax effects SFr 1.1 SFr (13.3) SFr 0.9
Effective tax rate (in percentage) 0.70% 13.40% (15.10%)
Income tax expense (benefit) SFr 1.5 SFr 37.4 SFr (10.5)