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Income taxes (Tables)
 12 Months Ended
Dec. 31, 2022
Disclosure of Income Tax [abstract]  
Income before taxes
(USD millions)
2022
2021
2020
Switzerland 1
5 986
22 028
9 786
Foreign
2 385
4 109
92
Income before taxes
8 371
26 137
9 878
 1  The 2021 income before taxes in Switzerland includes a USD 14.6 billion non-taxable gain on the divestment of the Group’s investment in Roche Holding AG (see Note 2 and Note 4).
Current and deferred income tax expense
The significant components of the provision for income taxes are as follows:
(USD millions)
2022
2021
2020
Switzerland
-617
-958
-932
Foreign
-1 454
-1 470
-1 168
Current income tax expense
-2 071
-2 428
-2 100
Switzerland
-142
23
-137
Foreign
797
286
430
Deferred tax income
655
309
293
Income tax expense
-1 416
-2 119
-1 807
Analysis of tax rate
(As a percentage)
2022
2021
2020
Applicable tax rate
16.8
14.8
13.6
Effect of disallowed expenditures
2.6
1.0
4.6
Effect of utilization of previously unrecognized tax losses brought forward from prior periods
0.0
0.0
-0.3
Effect of income taxed at reduced rates
-0.3
-0.1
-0.3
Effect of income not subject to tax 1
-0.1
-7.5
-0.7
Effect of tax credits and allowances
-3.8
-1.4
-2.3
Effect of release of contingent consideration liability
-0.5
-0.1
-0.2
Effect of tax rate change on current and deferred tax assets and liabilities
-0.1
0.0
0.3
Effect of derecognition and reversals of derecognition of deferred tax assets
1.2
0.0
0.2
Effect of write-down and reversal of write-down of investments in subsidiaries
0.0
0.0
-0.8
Effect of prior-year items
-0.4
0.1
2.3
Effect of changes in uncertain tax positions
1.4
1.3
2.0
Effect of other items
0.1
0.0
-0.1
Effective tax rate
16.9
8.1
18.3
 1  2021 includes the effect of income not subject to tax (-7.3%) arising from the non-taxable gain on the divestment of our investment in Roche. See Notes 2 and 4 for further details.