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Tax | 6 Months Ended
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Jun. 30, 2023
Tax | 18 Tax Credit Suisse has used a year-to-date effective tax rate (discrete method) as the best estimate of the annual effective tax rate to calculate the 6M23 income tax expense. This is mainly due to the inability to forecast the annual effective tax rate for the year as a result of the acquisition of Credit Suisse Group AG by UBS and business uncertainty related to the previously disclosed issues affecting Credit Suisse. In 6M23, Credit Suisse incurred an income tax expense of CHF 765 million on income before taxes of CHF 2,939 million. The continuous reassessment of Credit Suisse’s deferred tax assets/(liabilities) and uncertain tax positions was additionally impacted by the acquisition of Credit Suisse Group AG by UBS. The reassessment overall resulted in an impact of CHF 448 million. Additionally, Credit Suisse recorded an impact of CHF 233 million, mainly relating to the tax impact of profitable entities in certain geographical locations, adjusted for other non-deductible expenses. This also reflected the impact of the gain from the write-down of additional tier 1 capital notes, on which Credit Suisse utilized unvalued tax losses from prior years. Net deferred tax assets/(liabilities)
end of |  | 6M23 |  | 2022 |
Net deferred tax assets (CHF million)
Deferred tax assets |  | 83 |  | 259 |
of which net operating losses |  | 12 |  | 138 |
of which deductible temporary differences |  | 71 |  | 121 |
Deferred tax liabilities |  | (178) |  | (670) |
Net deferred tax assets/(liabilities) |  | (95) |  | (411) |
Overall, net deferred tax liabilities of CHF 95 million decreased CHF 316 million in 6M23, primarily driven by a reduction in the deferred tax liability associated with the write-down of additional tier 1 capital notes, partially offset by the reassessment of the deferred tax assets.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 21 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.5.Q1) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 270 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI https://asc.fasb.org/topic&trid=2144680 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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