v3.26.1
Income tax expense - Relationship between net income before income tax expense and Income tax expense (Details)
$ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2025
KRW (₩)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
KRW (₩)
Dec. 31, 2023
KRW (₩)
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]        
Profit (loss) before tax ₩ 4,090,166 $ 2,831,446 ₩ 4,222,847 ₩ 3,517,453
Tax calculated at statutory tax rate [1] 997,720   1,014,678 859,608
Adjustments to net income:        
Effect of income that is exempt from taxation (189,253)   (46,946) (37,500)
Effect of expenses that are not deductible in determining taxable income 57,584   53,719 12,163
Adjustments recognized in the current period in relation to the current tax of prior periods 7,773   (36,205) (22,456)
Others (11,166)   66,132 78,744
Sub-total (135,062)   36,700 30,951
Income tax expense ₩ 862,658 $ 597,180 ₩ 1,051,378 ₩ 890,559
Effective tax rate 21.09% 21.09% 24.90% 25.32%
Description of applicable tax rate by taxable income The applicable income tax rate: 9.9% up to 200 million Won in tax basis, 20.9% over 200 million Won to 20 billion Won, 23.1% over 20 billion Won to 300 billion Won and 26.4% over 300 billion Won. The applicable income tax rate: 9.9% up to 200 million Won in tax basis, 20.9% over 200 million Won to 20 billion Won, 23.1% over 20 billion Won to 300 billion Won and 26.4% over 300 billion Won. The applicable income tax rate: 9.9% up to 200 million Won in tax basis, 20.9% over 200 million Won to 20 billion Won, 23.1% over 20 billion Won to 300 billion Won and 26.4% over 300 billion Won. The applicable income tax rate: 9.9% up to 200 million Won in tax basis, 20.9% over 200 million Won to 20 billion Won, 23.1% over 20 billion Won to 300 billion Won and 26.4% over 300 billion Won.
[1] The applicable income tax rate: 9.9% up to 200 million Won in tax basis, 20.9% over 200 million Won to 20 billion Won, 23.1% over 20 billion Won to 300 billion Won and 26.4% over 300 billion Won.