Interest and dividend income tax calculator

Formula and scope

Ordinary domestic interest/dividends: national withholding 14%, local tax 10% of national tax, total 15.4%. Above KRW 20 million, compare A = KRW 2.8 million + basic tax on excess financial income + other income − deductions, and B = all financial income × 14% + basic tax on other income − deductions; use the larger. This is national tax before credits/relief.

What this calculator cannot apply

All financial income must be ordinary domestic income subject to 14% withholding. Excludes dividend gross-up/credits, foreign/non-withheld income, private-loan 25%, exemptions, special separate taxation and partnership distributions. Difference from comparative tax is not the actual payment balance, which also depends on other income payments. Actual withholding rounding and filing may differ.

Calculation basis and official sources

• Income Tax Act, Article 62
• Income Tax Act, Articles 14 and 129

Sources checked: 8 November 2026 (KST, Asia/Seoul)