Inheritance Tax Saving Strategies — Complete Tax Calculation Guide by ₩1B, ₩3B, and ₩5B Brackets

Key Summary

• Spousal inheritance deduction of up to ₩3 billion + lump-sum deduction of ₩500 million → tax-free up to a basic ₩3.5 billion
• Lifetime gifts can spread out inherited assets and lower the applicable inheritance tax bracket
• An additional financial asset deduction of up to ₩200 million applies when inheriting financial assets

Basic Structure of Korean Inheritance Tax

Korea's inheritance tax has a top rate of 50%, one of the highest among OECD member countries. As of 2026, the inheritance tax base brackets are as follows.

Inheritance tax is calculated by subtracting various deductions from the assets of the decedent (the deceased person) to determine the tax base, then applying the tax rate.

Key Deduction Items — How Much Can Be Deducted

The most important inheritance tax deductions are as follows.

1. Spousal Inheritance Deduction If the spouse is alive, at least ₩500 million and up to ₩3 billion can be deducted. The deduction limit is the smaller of the amount actually inherited by the spouse and the spouse's statutory inheritance share. This deduction alone can greatly reduce the inheritance tax burden.

2. Lump-Sum Deduction of ₩500 Million If the lump-sum deduction (₩500 million) is more advantageous than the basic deduction (₩200 million) plus personal deductions, it can be selected and applied.

3. Financial Asset Deduction If there are financial assets (deposits, stocks, bonds), 20% of net financial assets can be additionally deducted, up to ₩200 million.

4. Cohabiting Home Inheritance Deduction If a child who lived with the decedent for at least 10 years inherits the home, an additional deduction of 100% of the home value, up to ₩600 million, is available.

Practical Calculations by Bracket

Case 1 — Inherited Assets of ₩1 Billion (with Spouse)

• Inherited assets: ₩1 billion
• Spousal deduction: ₩500 million (based on statutory inheritance share)
• Lump-sum deduction: ₩500 million
• Total deductions: ₩1 billion
• Tax base: ₩0 → inheritance tax ₩0

When the spousal deduction and lump-sum deduction are combined, assets of ₩1 billion or less are effectively tax-free.

Case 2 — Inherited Assets of ₩3 Billion (with Spouse)

• Inherited assets: ₩3 billion
• Spousal deduction: ₩1.5 billion (statutory inheritance share of 1/2)
• Lump-sum deduction: ₩500 million
• Total deductions: ₩2 billion
• Tax base: ₩1 billion
• Tax amount: ₩1 billion × 40% − ₩160 million = ₩240 million

Case 3 — Inherited Assets of ₩5 Billion (with Spouse)

• Inherited assets: ₩5 billion
• Spousal deduction: ₩2.5 billion
• Lump-sum deduction: ₩500 million
• Tax base: ₩2 billion
• Tax amount: ₩2 billion × 40% − ₩160 million = ₩640 million

For a more precise calculation, try the inheritance tax calculator.

Tax Saving Strategy — Reduce Inheritance Tax Through Lifetime Gifts

The key to reducing inheritance tax is lifetime gifting. Gifts made within 10 years before the inheritance commencement date (date of death) are added back to inherited assets, but gifts made more than 10 years earlier are excluded from inherited assets.

Gift Tax Deduction Limits (10-year aggregate):

• Spouse: ₩600 million
• Adult child: ₩50 million
• Minor child: ₩20 million
• Grandchild: ₩50 million (lineal descendant)

Tax Saving Simulation: If a person with ₩5 billion in assets gives ₩600 million to a spouse and ₩50 million each to two children starting 10 years in advance:

• Total lifetime gifts: ₩600 million + ₩100 million = ₩700 million (tax-free gifts)
• Inherited assets reduced to ₩4.3 billion
• Tax saving effect: tax base reduced by ₩700 million → approximately ₩280 million in tax savings

To calculate the total tax on inherited real estate together with real estate acquisition tax, use the acquisition tax calculator as well.

Expert Key Takeaways

Korea's inheritance tax is among the highest in the world. However, using the spousal deduction (up to ₩3 billion), lump-sum deduction (₩500 million), financial asset deduction (₩200 million), and cohabiting home deduction (₩600 million) can significantly reduce the actual burden. Over the long term, a lifetime gifting strategy is the most effective approach. It is recommended to build a long-term plan of at least 10 years with a tax accountant.

FAQ

Q1. When is the inheritance tax filing deadline? Inheritance tax must be filed and paid within 6 months from the last day of the month in which the inheritance commencement date (date of death) falls. For overseas residents, the deadline is 9 months.

Q2. Can inheritance tax be paid in installments? If inheritance tax exceeds ₩20 million, installment payment over up to 5 years (annual installment payment) is available. Interest (a surcharge of 1.2%) applies, but it can reduce the cash flow burden.

Q3. Do I also have to pay acquisition tax if I inherit real estate? Real estate acquired through inheritance is subject to acquisition tax of 2.8% (2.3% for rural and fishing communities).

Q4. Which is more advantageous, inheritance tax or gift tax? In general, early lifetime gifting is more advantageous for tax savings. However, if the donor dies within 10 years after the gift, the gifted assets are added back to inherited assets, so timing is important.

Q5. If the spousal deduction is used, can tax be imposed again when the spouse dies? Yes. When the spouse dies, another inheritance to the children occurs, so inheritance tax is imposed again. To prevent this, a plan that considers the second inheritance is needed.

Q6. Are stocks and coins also subject to inheritance tax? Yes. Stocks are valued at the average price for 2 months before and after death, while virtual assets are valued at the average price for 1 month before and after the date of death.