Korea Inheritance Tax 2026: How Much on a ₩2B Estate After Deductions

When my father passed away last spring, none of us wanted to talk about money. But a lawyer friend pulled me aside and said one thing: the tax clock starts ticking the moment he's gone. Six months. After that, penalties start stacking up. I'd never filed anything more complicated than a credit card expense report, and suddenly I was staring at a ₩2 billion estate trying to figure out what was actually ours and what belonged to the government.

The good news: Korea's inheritance tax looks scarier on paper than it feels in practice — as long as you understand the deductions. A spouse plus two kids can often walk away from a ₩1 billion estate paying zero won. A ₩2 billion estate might only owe 5% effective. This guide is the plain-English version of what I wish someone had handed me that first week.

What Korean Inheritance Tax Actually Is

Inheritance tax is charged on the heirs who receive the estate, not on the deceased. Korea uses an 'estate tax' model — tax is calculated on the total estate first, then split among heirs by their share. The filing deadline is six months from the last day of the month of death. Miss it, and you lose the 3% timely-filing credit and start accruing penalties that can hit 20–40% of the tax due.

The taxable value starts with everything the deceased owned at market value — apartments, deposits, stocks, insurance proceeds, severance pay. Then gifts made to heirs within the previous 10 years get added back in. Debts and funeral costs (up to ₩15M) come out. What's left is the taxable estate, and only after deductions does the actual tax base appear.

The 2026 Rate Table

Korea runs a 5-bracket progressive system. The formula is simple once you see it: Tax = Taxable Base × Rate − Progressive Deduction. The progressive deduction is a shortcut that makes the math clean without having to split the base across each bracket manually.

A ₩800M taxable base works out to 800 × 30% − 60 = ₩180M. Apply the 3% timely-filing credit and you're at roughly ₩174.6M. That's the whole formula. The hard part isn't the rates — it's getting the taxable base as small as possible through deductions.

The Deductions That Actually Matter

Most households never pay inheritance tax because the deductions eat the whole estate. Here are the ones worth memorizing.

• Basic deduction: ₩200M flat, applied to every estate.
• Lump-sum deduction: ₩500M. If the basic plus personal deductions add up to less than ₩500M, you take the lump-sum instead. Almost everyone does.
• Spouse deduction: minimum ₩500M, maximum ₩3B. The real amount equals what the spouse actually inherits, capped by the legal share (1.5 : 1 versus each child).
• Financial asset deduction: up to ₩200M. Net financial assets under ₩20M get fully deducted; above that, 20% of the balance (minimum ₩20M).
• Cohabitation housing deduction: up to ₩600M if a non-homeowning heir lived with the deceased in the same house for 10+ years.

The spouse deduction is the single most powerful tool. Because the minimum is ₩500M regardless of what the spouse actually receives, a married couple with kids automatically gets ₩1B of combined deductions (₩500M lump-sum + ₩500M spouse). That's why most ₩1B estates pay nothing.

Real Example: ₩2B Estate, Spouse + Two Kids

Here's the scenario I promised. Father leaves behind an apartment worth ₩1.5B and ₩500M in bank deposits. Surviving family: spouse and two adult children. Funeral costs came to ₩15M. No debts, no prior gifts.

A ₩2B estate ends up owing less than ₩100M in real tax. The spouse carrying the legal share does most of the heavy lifting, and the financial asset deduction knocks off another ₩30M of tax. If the spouse had only claimed the ₩500M minimum, the tax would've ballooned past ₩200M — more than double.

Valuing the Estate

The tricky part is figuring out what everything is worth. The rule is 'market value at the date of death,' but that means different things for different assets.

Apartments and condos get valued at the most recent comparable sale in the same building, or the government's public price if no sales exist. Land uses individual officially assessed land value. Listed stocks take the average closing price for two months before and two months after death. Bank deposits are straightforward — just the balance plus accrued interest. Life insurance proceeds and lump-sum pensions count too.

If you inherit an apartment the family bought 20 years ago for ₩400M but which is worth ₩1.5B today, the inheritance tax uses ₩1.5B. That same ₩1.5B becomes the new 'cost basis' when the heir later sells — so there's no capital gains tax on the appreciation that happened before death. It's one of the quiet benefits of inheriting rather than receiving a lifetime gift.

Inheritance vs. Gift: Which Is Cheaper?

Both taxes use the same 10–50% rate table, but gifts use per-person exemptions that reset every 10 years. A spouse can receive ₩600M gift-tax-free every decade, each adult child ₩50M, each minor child ₩20M. Over 20–30 years, systematic gifting can move serious wealth without triggering either tax.

The catch: gifts made within 10 years before death get pulled back into the inheritance estate. So the earlier you gift, the better. Starting at age 60 gives you almost no benefit; starting at 50 can reshape an entire estate.

Use the calculator to plug in your own numbers. Try switching spouse allocation between the minimum ₩500M and the full legal share — watch how much the final tax drops. That's the single lever that matters most on any estate between ₩1B and ₩3B.