Inheritance Tax Calculator
Calculate Korean inheritance tax from estate value and deductions (spouse, children, general). Supports 2026 tax law with tier-based tax-saving strategies.
This calculator is for reference only and may differ from actual amounts due to law changes or individual circumstances. Please consult a licensed professional (tax accountant, labor attorney, etc.) for accurate calculations.
Total Deductions
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Taxable Amount
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Calculated Tax
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Tax Payable
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Notice: Based on Korean Inheritance & Gift Tax Act 2026. Actual tax may vary depending on asset valuation, debt deductions, and additional deductions. Filing deadline: 6 months from death (9 months for foreign residents). Consult a tax accountant for complex estates.
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Frequently Asked Questions
Q. When must inheritance tax be filed?
Within 6 months of the date of death. Filing on time provides a 3% tax credit on the calculated tax amount.
Q. Is the lump-sum deduction or itemized deduction better?
The ₩500M lump-sum deduction is better when family is only a surviving spouse or there are few children. Many children, minors, or disabled members may push itemized deductions above ₩500M.
Q. Are agricultural land or family business inheritances different?
The family business succession deduction can reach ₩50B but requires strict 10+ year management conditions. The farmland deduction is up to ₩3B. This calculator uses standard residential estate rates.
Q. What is the basic inheritance tax deduction?
Basic deduction ₩200M + itemized deductions (spouse up to ₩3B, ₩50M per child). The ₩500M lump-sum deduction can be used instead, whichever is larger.
Q. What is the difference between gift tax and inheritance tax?
Gift tax applies when transferring assets during one's lifetime; inheritance tax applies when assets transfer after death. Advance gifting can reduce ultimate inheritance tax.
Q. How much spouse deduction is allowed?
Minimum ₩500M up to ₩3B within the statutory inheritance share. Maximizing the spouse deduction is the most powerful inheritance tax reduction strategy.
How to Use
Input total assets by category: real estate, financial assets, and other assets.
Indicate whether a spouse survives, number of children, minors, and dependents aged 65+.
All deduction items are auto-calculated. The more favorable of lump-sum (₩500M) or itemized deductions is applied.
Taxable base, calculated tax, filing credit (3%), and final tax payable are displayed.
Expert Knowledge: Inheritance Tax Calculator
Korea's inheritance tax rates are among the highest in the OECD, reaching a top rate of 50%. However, the deduction system is robust — maximizing deductions can dramatically reduce the effective rate.
The spouse deduction is the most powerful tax-reduction tool, allowing up to ₩3B (within the statutory share) to be deducted tax-free. Families with a surviving spouse should always model "spousal succession first" strategies.
Advance gifting — transferring assets during one's lifetime — is effective but subject to the 10-year lookback rule (gifts to heirs within 10 years of death are added back to the estate). Using the annual gift tax exclusion (₩50M per recipient per 10 years) over a 10+ year horizon is the safest long-term tax planning approach.
Tax by estate size: ₩1B estate with ₩500M lump-sum deduction → taxable base ₩500M → ~₩90M in tax. For ₩3B estates with maximum spouse deduction, effective rates can fall below 20%. Professional tax advisor consultation can save hundreds of millions of won.
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